/* =====================================================================
   Conference archive – design system v2
   App shell: fixed navigation rail on the left (like the original
   conference system), glass top bar, content stage on the right.
   One layout for every edition; brands swap tokens only:
   - CPOTE: logo blue + green, key visual "wave with energy icons"
   - ECOS:  teal / celadon theme, key visual "Rędziński Bridge"
   ===================================================================== */

/* ---------- 1. Tokens ---------- */
:root {
  --font-display: "Bricolage Grotesque", "Segoe UI", system-ui, sans-serif;
  --font-body: "Instrument Sans", "Segoe UI", system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "Cascadia Mono", Consolas, monospace;

  --paper: #F4F7FB;
  --surface: #FFFFFF;
  --surface-2: #EDF2F8;
  --ink: #0D1726;
  --ink-2: #2A3A50;
  --muted: #5A6A80;
  --line: #DCE3EC;
  --line-strong: #C3CFDD;

  /* CPOTE */
  --brand-a: #81A3D1;          /* cloud blue */
  --brand-b: #98B234;          /* CPOTE green */
  --brand-c: #C2413B;          /* red line of the key visual */
  --brand-a-strong: #2C5A96;
  --brand-b-strong: #5A7413;
  --brand-a-soft: #E4EDF8;
  --brand-b-soft: #EEF4DC;
  --on-brand-b: #0D1726;
  --link: var(--brand-a-strong);
  --focus: #2C5A96;

  --rail-bg: #15365F;
  --rail-bg-2: #0B1E38;
  --rail-ink: #ECF3FC;
  --rail-muted: #A9BDD8;
  --rail-line: rgb(255 255 255 / .09);
  --rail-hover: rgb(255 255 255 / .07);
  --rail-accent: #B9D35A;
  --rail-accent-bg: rgb(185 211 90 / .15);

  --wave-1: #81A3D1;
  --wave-2: #C2413B;
  --wave-3: #98B234;

  --sky-top: #DCEAF8;
  --sky-mid: #EEF5FC;
  --hero-ink: var(--ink);
  --hero-ink-2: var(--ink-2);
  --year-grad: linear-gradient(100deg, #2C5A96 0%, #6F96CC 42%, #98B234 92%);

  /* isotherm fields on state pages */
  --field-a: #81A3D1;
  --field-b: #98B234;
  --night: #0B1E38;
  --night-2: #15365F;
  --on-night: #EAF1FA;
  --on-night-muted: #A9BDD8;

  --radius-s: 10px;
  --radius: 16px;
  --radius-l: 24px;
  --radius-xl: 32px;
  --rail-w: 296px;
  --topbar-h: 64px;
  --wrap: 1180px;
  --gutter: clamp(16px, 3.4vw, 44px);
  --shadow-1: 0 1px 2px rgb(13 23 38 / .05), 0 10px 30px -14px rgb(13 23 38 / .18);
  --shadow-2: 0 2px 6px rgb(13 23 38 / .07), 0 30px 60px -24px rgb(13 23 38 / .32);
  --ease-out: cubic-bezier(.16, 1, .3, 1);

  color-scheme: light;
  interpolate-size: allow-keywords;
}

[data-brand="ecos"] {
  --paper: #F1F7F7;
  --surface-2: #E7F2F1;
  --line: #D3E4E3;
  --line-strong: #B9D2D1;
  --brand-a: #0D6980;          /* teal of the conference system */
  --brand-b: #45B89D;          /* celadon */
  --brand-c: #B4312C;          /* ECOS logo red */
  --brand-a-strong: #0B5E72;
  --brand-b-strong: #1A705D;
  --brand-a-soft: #DCEFEF;
  --brand-b-soft: #DDF3EB;
  --on-brand-b: #04282D;
  --focus: #0B5E72;

  --rail-bg: #0D6980;
  --rail-bg-2: #08495A;
  --rail-ink: #F0FBFA;
  --rail-muted: #C8E8EC;
  --rail-line: rgb(255 255 255 / .12);
  --rail-hover: rgb(255 255 255 / .08);
  --rail-accent: #A8ECDB;
  --rail-accent-bg: rgb(168 236 219 / .16);

  --wave-1: #0D6980;
  --wave-2: #B4312C;
  --wave-3: #45B89D;

  --hero-ink: #FFFFFF;
  --hero-ink-2: rgb(255 255 255 / .82);
  --year-grad: linear-gradient(100deg, #A8ECDB 0%, #7ED8C3 45%, #FFFFFF 100%);

  --field-a: #7FD6C2;
  --field-b: #E0605A;
  --night: #063A47;
  --night-2: #0B5E72;
  --on-night-muted: #B4DDE2;
}
[data-brand="neutral"] { --field-a: #81A3D1; --field-b: #E0605A; }

:root[data-theme="dark"] {
    --paper: #08111C;
    --surface: #0E1928;
    --surface-2: #132133;
    --ink: #E8EEF6;
    --ink-2: #C7D3E2;
    --muted: #93A3B8;
    --line: #1E2D41;
    --line-strong: #2C3E56;
    --brand-a-strong: #9DBBE6;
    --brand-b-strong: #B9D35A;
    --brand-a-soft: #13283F;
    --brand-b-soft: #1D2910;
    --focus: #9DBBE6;
    --sky-top: #0F2440;
    --sky-mid: #0A1626;
    --year-grad: linear-gradient(100deg, #9DBBE6 0%, #81A3D1 40%, #B9D35A 92%);
    --shadow-1: 0 1px 2px rgb(0 0 0 / .4), 0 10px 30px -14px rgb(0 0 0 / .7);
    --shadow-2: 0 2px 6px rgb(0 0 0 / .4), 0 30px 60px -24px rgb(0 0 0 / .85);
    color-scheme: dark;
}
:root[data-theme="dark"][data-brand="ecos"] {
    --paper: #061416;
    --surface: #0B1E21;
    --surface-2: #10282C;
    --line: #183538;
    --line-strong: #24484C;
    --brand-a-strong: #7FD1DE;
    --brand-b-strong: #7ED8C3;
    --brand-a-soft: #0E2E34;
    --brand-b-soft: #0F2C26;
    --focus: #7FD1DE;
    --rail-bg: #0B5568;
    --rail-bg-2: #06303B;
}

/* ---------- 2. Base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: calc(var(--topbar-h) + 16px); }
body {
  margin: 0;
  min-height: 100dvh;
  background: var(--paper);
  color: var(--ink);
  font: 400 1.0625rem/1.65 var(--font-body);
  font-optical-sizing: auto;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
main { outline: none; }
img, svg, canvas { display: block; max-width: 100%; }
img { height: auto; }
a { color: var(--link); text-decoration-thickness: .08em; text-underline-offset: .18em; }
a:hover { text-decoration-thickness: .14em; }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 3px; border-radius: 6px; }
h1, h2, h3, h4 { font-family: var(--font-display); line-height: 1.1; letter-spacing: -.02em; text-wrap: balance; margin: 0; }
p { text-wrap: pretty; }
code, .mono { font-family: var(--font-mono); font-size: .92em; }
kbd {
  display: inline-block; padding: 2px 6px; border-radius: 6px;
  border: 1px solid color-mix(in srgb, currentColor 22%, transparent);
  background: color-mix(in srgb, currentColor 6%, transparent);
  font: 500 .68rem/1.3 var(--font-mono); letter-spacing: .02em; white-space: nowrap; opacity: .85;
}
.ico-fill { fill: currentColor !important; stroke: none !important; }
svg[viewBox="0 0 24 24"] { fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
.sr-only { position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }
.skip-link { position: absolute; left: 12px; top: -60px; z-index: 100; padding: 10px 16px; border-radius: var(--radius-s); background: var(--surface); color: var(--ink); font-weight: 600; transition: top .2s; }
.skip-link:focus { top: 12px; }
.muted { color: var(--muted); }
ul.plain { list-style: none; padding: 0; margin: 0; display: grid; gap: .4rem; }
.wrap {
  width: 100%;
  max-width: calc(var(--wrap) + 2 * var(--gutter));
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.eyebrow {
  margin: 0 0 .7rem;
  font: 600 .76rem/1.2 var(--font-body);
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--brand-a-strong);
}
.text-grad { background: var(--year-grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
[data-brand="ecos"] .text-grad { background: linear-gradient(100deg, var(--brand-a-strong), var(--brand-b)); -webkit-background-clip: text; background-clip: text; }

/* ---------- 3. Shell: rail + stage ---------- */
.rail {
  position: fixed; inset: 0 auto 0 0; z-index: 60;
  width: var(--rail-w);
  display: flex; flex-direction: column;
  padding-top: env(safe-area-inset-top, 0px);
  background:
    radial-gradient(140% 50% at 0% 0%, rgb(255 255 255 / .13), transparent 60%),
    radial-gradient(120% 40% at 100% 100%, color-mix(in srgb, var(--rail-accent) 16%, transparent), transparent 70%),
    linear-gradient(180deg, var(--rail-bg) 0%, var(--rail-bg-2) 100%);
  color: var(--rail-ink);
  box-shadow: inset -1px 0 0 rgb(255 255 255 / .06);
}
.rail-head { display: flex; align-items: center; gap: 8px; padding: 18px 16px 14px; }
/* logo on its own white tile: original colours, clear space >= 1/4 of the logo height */
.rail-brand {
  flex: 1; display: flex; align-items: center; justify-content: center;
  padding: 14px 18px; border-radius: 18px; background: #fff;
  box-shadow: 0 1px 0 rgb(255 255 255 / .4) inset, 0 14px 30px -16px rgb(0 0 0 / .55);
  transition: transform .35s var(--ease-out);
}
.rail-brand:hover { transform: translateY(-2px) rotate(-.4deg); }
.rail-logo { height: 52px; width: auto; }
[data-brand="ecos"] .rail-logo { height: 40px; }
.icon-btn.rail-close { display: none; }

.rail-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 4px 10px; padding: 2px 20px 14px; font-size: .82rem; color: var(--rail-muted); line-height: 1.35; }
.rail-edition { padding: 3px 9px; border-radius: 999px; background: var(--rail-accent-bg); color: var(--rail-accent); font-weight: 600; font-size: .74rem; letter-spacing: .04em; }
.rail-when { color: var(--rail-ink); font-weight: 500; }
.rail-where { flex-basis: 100%; }

.rail-search {
  display: flex; align-items: center; gap: 10px;
  margin: 0 16px 10px; padding: 0 12px; min-height: 42px;
  border: 1px solid rgb(255 255 255 / .14); border-radius: 12px;
  background: rgb(0 0 0 / .14); color: var(--rail-muted);
  font: 500 .9rem/1 var(--font-body); cursor: pointer; text-align: left;
  transition: background-color .2s, border-color .2s, color .2s;
}
.rail-search:hover { background: rgb(0 0 0 / .22); border-color: rgb(255 255 255 / .28); color: var(--rail-ink); }
.rail-search svg { width: 18px; height: 18px; flex: none; }
.rail-search span { flex: 1; }

.rail-nav {
  flex: 1; overflow-y: auto; overscroll-behavior: contain;
  padding: 6px 12px 16px;
  scrollbar-width: thin; scrollbar-color: rgb(255 255 255 / .18) transparent;
}
.rail-link, .rail-group > summary {
  display: flex; align-items: center; gap: 12px;
  padding: 9px 10px; border-radius: 12px;
  color: var(--rail-ink); text-decoration: none;
  font: 500 .95rem/1.2 var(--font-body);
  cursor: pointer; user-select: none;
  transition: background-color .2s;
}
.rail-link:hover, .rail-group > summary:hover { background: var(--rail-hover); text-decoration: none; }
.rail-link[aria-current="page"] { background: var(--rail-accent-bg); color: #fff; }
.rail-link[aria-current="page"] .rail-icon { color: var(--rail-accent); }
.rail-group > summary { list-style: none; }
.rail-group > summary::-webkit-details-marker { display: none; }
.rail-icon { width: 30px; height: 30px; flex: none; display: grid; place-items: center; border-radius: 9px; background: rgb(255 255 255 / .07); color: var(--rail-muted); transition: color .2s, background-color .2s; }
.rail-icon svg { width: 18px; height: 18px; }
.rail-group[open] > summary .rail-icon { background: var(--rail-accent-bg); color: var(--rail-accent); }
.rail-group-title { flex: 1; min-width: 0; }
.rail-count { font: 500 .68rem/1 var(--font-mono); padding: 4px 7px; border-radius: 999px; background: rgb(255 255 255 / .07); color: var(--rail-muted); }
.rail-chev { display: grid; color: var(--rail-muted); transition: transform .3s var(--ease-out); }
.rail-chev svg { width: 16px; height: 16px; }
.rail-group[open] > summary .rail-chev { transform: rotate(90deg); }
.rail-group::details-content { block-size: 0; overflow: clip; transition: block-size .35s var(--ease-out), content-visibility .35s allow-discrete; }
.rail-group[open]::details-content { block-size: auto; }
.rail-group ul { list-style: none; margin: 2px 0 8px 24px; padding: 0 0 0 14px; border-left: 1px solid var(--rail-line); display: grid; gap: 1px; }
.rail-group ul a {
  position: relative; display: block; padding: 7px 10px; border-radius: 9px;
  color: var(--rail-muted); text-decoration: none; font-size: .9rem; line-height: 1.3;
  transition: color .2s, background-color .2s;
}
.rail-group ul a:hover { color: #fff; background: var(--rail-hover); }
.rail-group ul a[aria-current] { color: #fff; background: var(--rail-accent-bg); font-weight: 600; }
.rail-group ul a[aria-current]::before { content: ""; position: absolute; left: -16px; top: 22%; bottom: 22%; width: 3px; border-radius: 3px; background: var(--rail-accent); }
.rail-edition-link { display: flex !important; align-items: baseline; gap: 6px; flex-wrap: wrap; }
.rail-edition-link strong { color: #fff; font-family: var(--font-display); }
.rail-edition-link--cpote strong { color: #C9DE83; }
.rail-edition-link--ecos strong { color: #A8ECDB; }
.rail-edition-link small { flex-basis: 100%; font-size: .74rem; opacity: .75; }

.rail-foot { position: relative; padding: 14px 16px calc(16px + env(safe-area-inset-bottom, 0px)); border-top: 1px solid var(--rail-line); overflow: hidden; }
.rail-foot .waves { position: absolute; inset: auto -10% -18px -10%; width: 120%; height: 110px; opacity: .55; pointer-events: none; --wave-1: #9FBDE6; --wave-2: #E26A62; --wave-3: #B9D35A; }
[data-brand="ecos"] .rail-foot .waves { --wave-1: #A8ECDB; --wave-2: #F08A84; --wave-3: #FFFFFF; }
.rail-actions { position: relative; display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.btn.btn-rail { --btn-bg: color-mix(in srgb, var(--rail-bg-2) 82%, #fff 18%); --btn-fg: var(--rail-ink); border-color: rgb(255 255 255 / .18); }
.btn.btn-rail:hover { --btn-bg: color-mix(in srgb, var(--rail-bg-2) 70%, #fff 30%); }
.btn-rail svg { width: 16px; height: 16px; }
.rail-scrim { display: none; }

.stage { position: relative; isolation: isolate; margin-left: var(--rail-w); min-width: 0; min-height: 100dvh; display: flex; flex-direction: column; }
.stage > main { flex: 1; }

/* very light, slowly drifting isotherms behind the whole page; the pointer adds a little heat */
.page-field {
  position: fixed; inset: 0 0 0 var(--rail-w); z-index: -1; pointer-events: none;
  --field-alpha: .58;
  -webkit-mask-image: linear-gradient(180deg, #000 0%, rgb(0 0 0 / .9) 60%, rgb(0 0 0 / .75) 100%);
  mask-image: linear-gradient(180deg, #000 0%, rgb(0 0 0 / .9) 60%, rgb(0 0 0 / .75) 100%);
}
.page-field canvas { width: 100%; height: 100%; }
[data-brand="ecos"] .page-field { --field-a: #0D6980; --field-b: #45B89D; --field-alpha: .5; }
[data-brand="cpote"] .page-field { --field-a: #81A3D1; --field-b: #98B234; }
[data-theme="dark"] .page-field { --field-alpha: .4; }
@media (max-width: 1080px) { .page-field { left: 0; } }
/* liquid variant: soft marbled colour, a little stronger at the top */
.page-field--fluid { --fluid-alpha: .42; -webkit-mask-image: linear-gradient(180deg, #000 0%, rgb(0 0 0 / .85) 55%, rgb(0 0 0 / .6) 100%); mask-image: linear-gradient(180deg, #000 0%, rgb(0 0 0 / .85) 55%, rgb(0 0 0 / .6) 100%); }
.page-field--fluid canvas { image-rendering: auto; filter: saturate(1.15); }
[data-brand="ecos"] .page-field--fluid { --fluid-alpha: .38; }
[data-theme="dark"] .page-field--fluid { --fluid-alpha: .3; }

/* ---------- micro-interactions in the rail ---------- */
.rail-link, .rail-group > summary { position: relative; overflow: hidden; }
.rail-link::after, .rail-group > summary::after { /* light sweep on hover */
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: linear-gradient(100deg, transparent 30%, rgb(255 255 255 / .09) 50%, transparent 70%);
  transform: translateX(-110%);
}
@media (prefers-reduced-motion: no-preference) {
  .rail-link:hover::after, .rail-group > summary:hover::after { transform: translateX(110%); transition: transform .7s var(--ease-out); }
  .rail-link:hover .rail-icon, .rail-group > summary:hover .rail-icon { transform: translateY(-1px) rotate(-6deg) scale(1.06); }
  .rail-icon { transition: color .2s, background-color .2s, transform .35s var(--ease-out); }
  .rail-group ul a { transition: color .2s, background-color .2s, transform .3s var(--ease-out), padding-left .3s var(--ease-out); }
  .rail-group ul a:hover { transform: translateX(3px); }
  .rail-group ul a::after { content: ""; position: absolute; left: 10px; right: 10px; bottom: 4px; height: 1px; background: currentColor; opacity: .35; transform: scaleX(0); transform-origin: 0 50%; transition: transform .35s var(--ease-out); }
  .rail-group ul a:hover::after { transform: scaleX(1); }
  .rail-group ul a[aria-current]::after { display: none; }
  .rail-group[open] ul li { animation: rail-item .4s var(--ease-out) both; }
  .rail-group[open] ul li:nth-child(2) { animation-delay: .03s; } .rail-group[open] ul li:nth-child(3) { animation-delay: .06s; }
  .rail-group[open] ul li:nth-child(4) { animation-delay: .09s; } .rail-group[open] ul li:nth-child(5) { animation-delay: .12s; }
  .rail-group[open] ul li:nth-child(6) { animation-delay: .15s; } .rail-group[open] ul li:nth-child(n+7) { animation-delay: .18s; }
  @keyframes rail-item { from { opacity: 0; transform: translateX(-8px); } }
  .rail-search:hover svg { transform: scale(1.12) rotate(-8deg); }
  .rail-search svg { transition: transform .35s var(--ease-out); }
  .btn svg { transition: transform .35s var(--ease-out); }
  .btn:hover svg { transform: translateX(2px); }
  .crumbs a, .site-footer a { background: linear-gradient(currentColor, currentColor) 0 100% / 0 1px no-repeat; transition: background-size .35s var(--ease-out), color .2s; }
  .crumbs a:hover, .site-footer a:hover { background-size: 100% 1px; text-decoration: none !important; }
  .prose a:not([data-file]):not(:has(img)) { text-decoration: none; background: linear-gradient(color-mix(in srgb, var(--brand-b) 45%, transparent), color-mix(in srgb, var(--brand-b) 45%, transparent)) 0 100% / 100% 1px no-repeat; transition: background-size .3s var(--ease-out); }
  .prose a:not([data-file]):not(:has(img)):hover { background-size: 100% 40%; }
}

/* top bar */
.topbar {
  position: sticky; top: 0; z-index: 40;
  height: calc(var(--topbar-h) + env(safe-area-inset-top, 0px));
  padding: env(safe-area-inset-top, 0px) var(--gutter) 0;
  display: flex; align-items: center; gap: 12px;
  color: var(--ink);
  transition: background-color .3s, box-shadow .3s, color .3s;
}
.topbar.is-scrolled {
  background: color-mix(in srgb, var(--paper) 78%, transparent);
  -webkit-backdrop-filter: saturate(1.6) blur(18px); backdrop-filter: saturate(1.6) blur(18px);
  box-shadow: 0 1px 0 var(--line), 0 12px 30px -24px rgb(0 0 0 / .45);
}
[data-brand="ecos"] .topbar:not(.is-scrolled),
.stage:has(> main > .state-page:first-child) .topbar:not(.is-scrolled) { color: #fff; }
.icon-btn.topbar-menu, .topbar-brand { display: none; }
.topbar-brand img { height: 34px; width: auto; }
[data-brand="ecos"] .topbar-brand { padding: 6px 10px; border-radius: 10px; background: #fff; }
[data-brand="ecos"] .topbar-brand img { height: 22px; }
.topbar-status { display: flex; align-items: center; gap: 8px; margin: 0 auto 0 0; font-size: .86rem; font-weight: 500; white-space: nowrap; overflow: hidden; }
.topbar-status-sub { opacity: .7; font-weight: 400; }
.topbar-actions { display: flex; align-items: center; gap: 8px; margin-left: auto; }
.topbar-search {
  display: flex; align-items: center; gap: 8px; min-width: 210px; height: 40px; padding: 0 8px 0 12px;
  border-radius: 999px; border: 1px solid color-mix(in srgb, currentColor 18%, transparent);
  background: color-mix(in srgb, currentColor 5%, transparent); color: inherit;
  font: 500 .88rem/1 var(--font-body); cursor: pointer;
  -webkit-backdrop-filter: blur(8px); backdrop-filter: blur(8px);
  transition: border-color .2s, background-color .2s;
}
.topbar-search:hover { border-color: color-mix(in srgb, currentColor 40%, transparent); }
.topbar-search svg { width: 18px; height: 18px; opacity: .8; }
.topbar-search span { opacity: .75; }
.topbar-search kbd { margin-left: auto; }
.topbar .btn { min-height: 40px; padding: 8px 16px; font-size: .9rem; }
.icon-btn {
  width: 42px; height: 42px; flex: none; display: grid; place-items: center;
  border: 0; border-radius: 12px; cursor: pointer;
  background: color-mix(in srgb, currentColor 9%, transparent); color: inherit;
}
.icon-btn svg { width: 22px; height: 22px; }
.scroll-progress {
  position: absolute; left: 0; right: 0; bottom: 0; height: 2px;
  transform-origin: 0 50%; transform: scaleX(0);
  background: linear-gradient(90deg, var(--wave-1), var(--wave-2), var(--wave-3));
  pointer-events: none;
}
@supports (animation-timeline: scroll()) {
  .scroll-progress { animation: progress linear both; animation-timeline: scroll(root); }
  @keyframes progress { to { transform: scaleX(1); } }
}

/* off-canvas rail on smaller screens */
@media (max-width: 1080px) {
  .rail {
    width: min(var(--rail-w), 88vw);
    transform: translateX(-104%); visibility: hidden;
    transition: transform .45s var(--ease-out), visibility 0s .45s;
    box-shadow: 30px 0 80px -30px rgb(0 0 0 / .6);
  }
  .rail.is-open { transform: none; visibility: visible; transition: transform .45s var(--ease-out), visibility 0s; }
  .icon-btn.rail-close { display: grid; color: var(--rail-ink); }
  .rail-scrim {
    display: block; position: fixed; inset: 0; z-index: 55;
    background: rgb(4 10 18 / .5); -webkit-backdrop-filter: blur(3px); backdrop-filter: blur(3px);
    opacity: 0; pointer-events: none; transition: opacity .3s;
  }
  .rail.is-open + .rail-scrim { opacity: 1; pointer-events: auto; }
  .stage { margin-left: 0; }
  .icon-btn.topbar-menu, .topbar-brand { display: grid; }
  .topbar-status { display: none; }
  body.rail-open { overflow: hidden; }
}
@media (max-width: 720px) {
  .topbar-login, .topbar-search span, .topbar-search kbd { display: none; }
  .topbar-search { min-width: 0; width: 42px; height: 42px; padding: 0; justify-content: center; }
  .topbar { gap: 8px; }
}
@media (max-width: 400px) { .topbar-register { display: none; } }

/* ---------- 4. Buttons, chips, badges ---------- */
.btn {
  --btn-bg: var(--surface-2); --btn-fg: var(--ink);
  display: inline-flex; align-items: center; justify-content: center; gap: .5em;
  min-height: 44px; padding: 10px 18px;
  border: 1px solid transparent; border-radius: 999px;
  background: var(--btn-bg); color: var(--btn-fg);
  font: 600 .95rem/1 var(--font-body); text-decoration: none; cursor: pointer; white-space: nowrap;
  transition: transform .25s var(--ease-out), box-shadow .25s, background-color .2s, color .2s, border-color .2s;
}
.btn:hover { transform: translateY(-1px); text-decoration: none; }
.btn:active { transform: translateY(0) scale(.98); }
.btn-primary {
  --btn-bg: var(--brand-b); --btn-fg: var(--on-brand-b);
  background-image: linear-gradient(180deg, rgb(255 255 255 / .22), rgb(255 255 255 / 0));
  box-shadow: 0 1px 0 rgb(255 255 255 / .35) inset, 0 10px 24px -12px color-mix(in srgb, var(--brand-b) 80%, transparent);
}
.btn-primary:hover { box-shadow: 0 1px 0 rgb(255 255 255 / .35) inset, 0 16px 30px -12px color-mix(in srgb, var(--brand-b) 90%, transparent); }
.btn-ghost { --btn-bg: transparent; --btn-fg: currentColor; border-color: color-mix(in srgb, currentColor 26%, transparent); }
.btn-ghost:hover { border-color: currentColor; }
.btn-glass {
  --btn-bg: color-mix(in srgb, var(--surface) 62%, transparent); --btn-fg: var(--ink);
  border-color: color-mix(in srgb, var(--ink) 14%, transparent);
  -webkit-backdrop-filter: blur(12px) saturate(1.4); backdrop-filter: blur(12px) saturate(1.4);
}
.btn-glass:hover { --btn-bg: var(--surface); }
[data-brand="ecos"] .hero .btn-glass { --btn-bg: rgb(255 255 255 / .12); --btn-fg: #fff; border-color: rgb(255 255 255 / .3); }
[data-brand="ecos"] .hero .btn-glass:hover { --btn-bg: rgb(255 255 255 / .22); }
.btn-lg { min-height: 56px; padding: 14px 28px; font-size: 1.02rem; }
.btn-arrow { display: inline-block; transition: transform .3s var(--ease-out); }
.btn:hover .btn-arrow { transform: translateX(4px); }

.chips { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 6px 12px; border-radius: 999px;
  background: var(--surface-2); color: var(--ink-2);
  border: 1px solid var(--line);
  font-size: .86rem; line-height: 1.2; text-decoration: none;
}
a.chip:hover { border-color: var(--brand-a-strong); color: var(--brand-a-strong); }
.badge {
  display: inline-block; padding: 3px 9px; border-radius: 6px;
  background: var(--brand-b-soft); color: var(--brand-b-strong);
  font: 600 .72rem/1.2 var(--font-body); letter-spacing: .06em; text-transform: uppercase;
}
.code { font: 500 .78rem/1.2 var(--font-mono); color: var(--muted); letter-spacing: .01em; }
.status-dot {
  position: relative; display: inline-block; width: 8px; height: 8px; border-radius: 50%; flex: none;
  background: var(--brand-c);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--brand-c) 22%, transparent);
}
@media (prefers-reduced-motion: no-preference) {
  .status-dot::after { content: ""; position: absolute; inset: -4px; border-radius: 50%; border: 2px solid var(--brand-c); animation: ping 2.4s var(--ease-out) infinite; }
  @keyframes ping { 0% { transform: scale(.6); opacity: .9; } 80%, 100% { transform: scale(2.2); opacity: 0; } }
}
.link-arrow { font-weight: 600; text-decoration: none; white-space: nowrap; display: inline-flex; align-items: center; gap: 8px; }
.link-arrow span { display: inline-block; transition: transform .25s var(--ease-out); }
.link-arrow:hover span { transform: translateX(4px); }
.link-button { border: 0; background: none; padding: 0; font: inherit; font-weight: 600; color: var(--link); cursor: pointer; }
.link-button:hover { text-decoration: underline; }

/* ---------- 5. Waves (CPOTE key-visual lines) ---------- */
.waves { display: block; overflow: visible; }
.wave { fill: none; stroke-width: 3; stroke-linecap: round; vector-effect: non-scaling-stroke; }
.wave-1 { stroke: var(--wave-1); }
.wave-2 { stroke: var(--wave-2); }
.wave-3 { stroke: var(--wave-3); stroke-width: 2.5; }
@media (prefers-reduced-motion: no-preference) {
  .wave { stroke-dasharray: 1600; stroke-dashoffset: 1600; animation: draw 2.6s var(--ease-out) forwards, sway 9s ease-in-out 2.6s infinite alternate; }
  .wave-2 { animation-delay: .2s, 2.8s; }
  .wave-3 { animation-delay: .4s, 3s; }
  @keyframes draw { to { stroke-dashoffset: 0; } }
  @keyframes sway { to { transform: translateY(6px); } }
}

/* ---------- 6. Isotherm fields (state pages) ---------- */
.state-field, .unknown-field { position: absolute; inset: 0; overflow: hidden; pointer-events: none; }
.state-field canvas, .unknown-field canvas { width: 100%; height: 100%; }
[data-interactive] { pointer-events: auto; }

/* ---------- 7. Home hero ---------- */
.hero {
  position: relative; isolation: isolate; overflow: hidden;
  margin-top: calc(-1 * (var(--topbar-h) + env(safe-area-inset-top, 0px)));
  padding-top: calc(var(--topbar-h) + env(safe-area-inset-top, 0px) + clamp(10px, 3svh, 44px));
  color: var(--hero-ink);
}
.hero-sky {
  position: absolute; inset: 0; z-index: -2;
  background:
    radial-gradient(60% 55% at 88% 6%, color-mix(in srgb, var(--brand-a) 42%, transparent), transparent 70%),
    radial-gradient(50% 45% at 4% 38%, color-mix(in srgb, var(--brand-b) 20%, transparent), transparent 70%),
    linear-gradient(180deg, var(--sky-top) 0%, color-mix(in srgb, var(--sky-mid) 80%, transparent) 48%, transparent 100%);
}
.hero-sky::after { /* dotted engineering grid, fading out */
  content: ""; position: absolute; inset: 0;
  background-image: radial-gradient(circle, color-mix(in srgb, var(--brand-a-strong) 26%, transparent) 1px, transparent 1.6px);
  background-size: 24px 24px;
  -webkit-mask-image: radial-gradient(70% 60% at 20% 25%, #000 10%, transparent 70%);
  mask-image: radial-gradient(70% 60% at 20% 25%, #000 10%, transparent 70%);
}
.hero-copy { position: relative; z-index: 2; }
.hero-copy > * { max-width: 780px; }

.hero-status {
  display: inline-flex; align-items: center; gap: 10px;
  margin: 0 0 clamp(10px, 2svh, 22px);
  padding: 6px 13px 6px 11px; border-radius: 999px;
  background: color-mix(in srgb, var(--surface) 60%, transparent);
  border: 1px solid color-mix(in srgb, var(--hero-ink) 12%, transparent);
  -webkit-backdrop-filter: blur(10px); backdrop-filter: blur(10px);
  font: 500 .82rem/1.2 var(--font-body); letter-spacing: .04em;
}
.hero-title {
  display: flex; flex-wrap: wrap; align-items: baseline; column-gap: .16em;
  margin: 0;
  font: 800 clamp(3.2rem, min(7.2vw, 12.5svh), 8.6rem)/.86 var(--font-display);
  font-variation-settings: "opsz" 96;
  letter-spacing: -.055em;
}
.hero-word { color: var(--hero-ink); }
[data-brand="cpote"] .hero-word { color: #14325A; }
.hero-year { background: var(--year-grad); -webkit-background-clip: text; background-clip: text; color: transparent; padding-right: .04em; }
.hero-name {
  max-width: 44ch !important; margin: clamp(10px, 1.8svh, 22px) 0 0;
  font: 400 clamp(1.05rem, min(1.5vw, 2.8svh), 1.45rem)/1.3 var(--font-display);
  color: var(--hero-ink-2); letter-spacing: -.01em;
}
.hero-name strong { color: var(--hero-ink); font-weight: 650; }
.hero-edition {
  display: inline-block; margin-right: .5em; padding: .1em .45em; border-radius: 8px;
  background: var(--brand-b); color: var(--on-brand-b);
  font-weight: 700; font-size: .76em; vertical-align: .12em; letter-spacing: 0;
}
.hero-motto { margin: clamp(8px, 1.5svh, 16px) 0 0; padding-left: 16px; border-left: 3px solid var(--brand-b); font-size: clamp(1rem, 1.3vw, 1.12rem); color: var(--hero-ink-2); font-style: italic; }
.hero-dedication { margin: 10px 0 0; color: var(--hero-ink-2); font-size: .98rem; }
.hero-facts { list-style: none; display: flex; flex-wrap: wrap; gap: 8px; margin: clamp(12px, 2.2svh, 24px) 0 0; padding: 0; }
.hero-facts li {
  display: inline-flex; align-items: center; gap: 8px; padding: 7px 14px 7px 10px; border-radius: 999px;
  background: color-mix(in srgb, var(--surface) 66%, transparent);
  border: 1px solid color-mix(in srgb, var(--hero-ink) 10%, transparent);
  -webkit-backdrop-filter: blur(10px); backdrop-filter: blur(10px);
  font-weight: 500; font-size: .95rem;
}
.hero-facts svg { width: 18px; height: 18px; color: var(--brand-a-strong); }
.hero-cta { display: flex; flex-wrap: wrap; gap: 12px; margin-top: clamp(14px, 2.6svh, 32px); }
.hero-cta .btn-lg { min-height: clamp(46px, 6.4svh, 56px); padding-block: 10px; }

/* CPOTE: the wave flows under the copy, full stage width */
/* the wave is sized by the viewport height so that the numbers below it stay above the fold */
.hero-art { position: relative; z-index: 1; align-self: flex-end; width: min(100%, calc((100svh - 420px) * 3.6)); min-width: min(100%, 760px); margin: calc(-1 * clamp(36px, 15svh, 140px)) 0 0; pointer-events: none; }
.hero-art img { width: 100%; }
@media (prefers-reduced-motion: no-preference) {
  [data-brand="cpote"] .hero-art img { animation: art-in 1.6s var(--ease-out) .25s both; }
  @keyframes art-in { from { clip-path: inset(0 100% 0 0); opacity: .2; transform: translateX(-2%); } to { clip-path: inset(0 0 0 0); opacity: 1; transform: none; } }
  @supports (animation-timeline: view()) {
    [data-brand="cpote"] .hero-art { animation: art-drift linear both; animation-timeline: view(); animation-range: exit 0% exit 100%; }
    @keyframes art-drift { to { transform: translateY(12%) scale(1.04); } }
  }
}
[data-brand="cpote"] .hero-copy { order: 0; }
[data-brand="cpote"] .hero { display: flex; flex-direction: column; }
[data-brand="cpote"] .hero-art { order: 1; }
[data-brand="cpote"] .hero-stats-wrap { order: 2; }

/* ECOS: the bridge at dusk fills the hero */
[data-brand="ecos"] .hero {
  min-height: clamp(560px, 100svh, 1020px);
  display: flex; flex-direction: column; justify-content: flex-end;
  padding-bottom: clamp(24px, 4vw, 48px);
  background: #062F3A;
}
[data-brand="ecos"] .hero-sky { display: none; }
[data-brand="ecos"] .hero-art { position: absolute; inset: 0; z-index: -1; width: auto; min-width: 0; margin: 0; overflow: hidden; }
[data-brand="ecos"] .hero-art img { width: 100%; height: 100%; object-fit: cover; object-position: 62% 40%; }
[data-brand="ecos"] .hero-art::after {
  content: ""; position: absolute; inset: 0;
  background:
    linear-gradient(90deg, rgb(4 47 58 / .94) 0%, rgb(8 73 90 / .7) 38%, rgb(8 73 90 / .1) 72%),
    linear-gradient(0deg, rgb(3 32 40 / .92) 0%, transparent 46%),
    linear-gradient(180deg, rgb(3 32 40 / .55) 0%, transparent 22%);
}
@media (prefers-reduced-motion: no-preference) {
  [data-brand="ecos"] .hero-art img { animation: kenburns 32s ease-in-out infinite alternate; }
  @keyframes kenburns { from { transform: scale(1.02); } to { transform: scale(1.14) translate(-1.5%, -1%); } }
}
[data-brand="ecos"] .hero-status { background: rgb(255 255 255 / .1); border-color: rgb(255 255 255 / .2); }
[data-brand="ecos"] .hero-facts li { background: rgb(255 255 255 / .1); border-color: rgb(255 255 255 / .18); }
[data-brand="ecos"] .hero-facts svg { color: #A8ECDB; }
[data-brand="ecos"] .hero-motto { border-left-color: #A8ECDB; }

/* stats */
.hero-stats-wrap { position: relative; z-index: 3; }
.hero-stats {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 12px;
  margin: clamp(6px, 1.4svh, 16px) 0 clamp(24px, 4vw, 56px); padding: 0;
}
[data-brand="ecos"] .hero-stats { margin-bottom: 0; margin-top: clamp(28px, 4vw, 48px); }
.hero-stat {
  position: relative; overflow: hidden; padding: clamp(10px, 1.8svh, 18px) 20px clamp(12px, 2svh, 18px); border-radius: 18px;
  background: color-mix(in srgb, var(--surface) 72%, transparent);
  border: 1px solid color-mix(in srgb, var(--line) 80%, transparent);
  -webkit-backdrop-filter: blur(14px) saturate(1.4); backdrop-filter: blur(14px) saturate(1.4);
  box-shadow: var(--shadow-1);
}
.hero-stat::before { content: ""; position: absolute; left: 20px; right: 20px; top: 0; height: 2px; border-radius: 2px; background: linear-gradient(90deg, var(--wave-1), var(--wave-3)); opacity: .9; }
[data-brand="ecos"] .hero-stat { background: rgb(255 255 255 / .08); border-color: rgb(255 255 255 / .16); box-shadow: none; }
[data-brand="ecos"] .hero-stat::before { background: linear-gradient(90deg, #A8ECDB, #E0605A); }
.hero-stats dt { font-size: .72rem; letter-spacing: .14em; text-transform: uppercase; color: var(--hero-ink-2); }
.hero-stats dd { margin: 4px 0 0; font: 750 clamp(1.7rem, min(3vw, 5.4svh), 2.8rem)/1 var(--font-display); letter-spacing: -.035em; font-variant-numeric: tabular-nums; color: var(--hero-ink); }

@media (prefers-reduced-motion: no-preference) {
  .reveal { animation: rise .9s var(--ease-out) both; }
  .hero-title.reveal { animation-delay: .05s; }
  .hero-name.reveal { animation-delay: .14s; }
  .hero-motto.reveal, .hero-dedication.reveal { animation-delay: .2s; }
  .hero-facts.reveal { animation-delay: .26s; }
  .hero-cta.reveal { animation-delay: .32s; }
  .hero-stats.reveal { animation-delay: .5s; }
}
@keyframes rise { from { opacity: 0; transform: translateY(18px); filter: blur(6px); } to { opacity: 1; transform: none; filter: none; } }

/* ---------- 8. Sections ---------- */
.section { padding-block: clamp(48px, 7vw, 104px); }
.section--tight { padding-block: clamp(28px, 4vw, 56px) clamp(48px, 6vw, 88px); }
.section--flush { padding-top: clamp(28px, 4vw, 48px); }
.section--keynotes { background: linear-gradient(180deg, transparent, color-mix(in srgb, var(--brand-a-soft) 60%, transparent) 30%, transparent); }
.section-head { display: flex; flex-wrap: wrap; align-items: end; justify-content: space-between; gap: 16px 32px; margin-bottom: clamp(24px, 3.4vw, 40px); }
.section-title { font-size: clamp(2rem, 4vw, 3.3rem); font-weight: 720; letter-spacing: -.04em; line-height: 1.02; }
.mini-title { margin: 0 0 .6rem; font: 600 .75rem/1.2 var(--font-body); letter-spacing: .14em; text-transform: uppercase; color: var(--muted); }

.about { display: grid; grid-template-columns: minmax(220px, 300px) minmax(0, 1fr); gap: clamp(28px, 5vw, 72px); align-items: start; }
.about-head { position: sticky; top: calc(var(--topbar-h) + 28px); }
.about-head .waves { width: 100%; height: 60px; margin-top: 22px; }
.about-body { padding: clamp(22px, 3.4vw, 48px); border-radius: var(--radius-xl); background: var(--surface); border: 1px solid var(--line); box-shadow: var(--shadow-1); }
@media (max-width: 960px) { .about { grid-template-columns: 1fr; } .about-head { position: static; } .about-head .waves { display: none; } }

/* ---------- 9. Bento ---------- */
.bento { list-style: none; margin: 0; padding: 0; display: grid; gap: 14px; grid-template-columns: repeat(4, minmax(0, 1fr)); grid-auto-flow: dense; }
.bento--1, .bento--2, .bento--3, .bento--4 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 240px), 1fr)); }
.bento-item { min-width: 0; perspective: 900px; }
.bento-item--feature { grid-column: span 2; grid-row: span 2; }
.bento--1 .bento-item--feature, .bento--2 .bento-item--feature, .bento--3 .bento-item--feature, .bento--4 .bento-item--feature { grid-column: auto; grid-row: auto; }
.bento-link {
  --mx: 50%; --my: 0%; --rx: 0deg; --ry: 0deg;
  position: relative; isolation: isolate; overflow: hidden;
  height: 100%; min-height: 176px;
  display: flex; flex-direction: column; gap: 6px;
  padding: 22px 22px 20px;
  border-radius: var(--radius-l);
  border: 1px solid transparent;
  background:
    linear-gradient(var(--surface), var(--surface)) padding-box,
    linear-gradient(135deg, var(--line), var(--line)) border-box;
  color: var(--ink); text-decoration: none;
  box-shadow: var(--shadow-1);
  transform: rotateX(var(--rx)) rotateY(var(--ry));
  transition: transform .5s var(--ease-out), box-shadow .35s;
}
.bento-link::before { /* pointer-following glow */
  content: ""; position: absolute; inset: 0; z-index: -1; opacity: 0;
  background: radial-gradient(380px circle at var(--mx) var(--my), color-mix(in srgb, var(--brand-a) 20%, transparent), transparent 60%);
  transition: opacity .3s;
}
.bento-link:hover {
  box-shadow: var(--shadow-2); text-decoration: none;
  background:
    linear-gradient(var(--surface), var(--surface)) padding-box,
    linear-gradient(135deg, var(--wave-1), var(--wave-2) 50%, var(--wave-3)) border-box;
}
.bento-link:hover::before { opacity: 1; }
.bento-icon { width: 46px; height: 46px; display: grid; place-items: center; margin-bottom: auto; border-radius: 14px; background: var(--brand-a-soft); color: var(--brand-a-strong); transition: transform .4s var(--ease-out); }
.bento-link:hover .bento-icon { transform: scale(1.08) rotate(-4deg); }
.bento-icon svg { width: 24px; height: 24px; }
.bento-title { margin-top: 20px; font: 680 1.22rem/1.2 var(--font-display); letter-spacing: -.02em; }
.bento-text { color: var(--muted); font-size: .93rem; line-height: 1.45; }
.bento-stat { align-self: flex-start; margin-top: 8px; padding: 4px 9px; border-radius: 999px; background: var(--brand-b-soft); font: 600 .74rem/1.2 var(--font-mono); color: var(--brand-b-strong); }
.bento-arrow { position: absolute; top: 18px; right: 20px; width: 34px; height: 34px; display: grid; place-items: center; border-radius: 50%; background: var(--surface-2); font-size: 1rem; color: var(--muted); transition: transform .4s var(--ease-out), background-color .3s, color .3s; }
.bento-link:hover .bento-arrow { transform: rotate(45deg); background: var(--brand-b); color: var(--on-brand-b); }
.bento-item--feature .bento-link {
  padding: clamp(24px, 3vw, 36px);
  background:
    radial-gradient(90% 80% at 100% 0%, color-mix(in srgb, var(--rail-accent) 26%, transparent), transparent 60%),
    linear-gradient(160deg, var(--rail-bg), var(--rail-bg-2)) padding-box,
    linear-gradient(135deg, var(--rail-bg), var(--rail-bg-2)) border-box;
  color: var(--rail-ink);
}
.bento-item--feature .bento-link:hover {
  background:
    radial-gradient(90% 80% at 100% 0%, color-mix(in srgb, var(--rail-accent) 34%, transparent), transparent 60%),
    linear-gradient(160deg, var(--rail-bg), var(--rail-bg-2)) padding-box,
    linear-gradient(135deg, var(--wave-1), var(--wave-2) 50%, var(--wave-3)) border-box;
}
.bento-item--feature .waves { position: absolute; left: -6%; right: -6%; top: 16%; width: 112%; height: 34%; z-index: -1; opacity: .7; --wave-1: #9FBDE6; --wave-2: #E26A62; --wave-3: #B9D35A; }
[data-brand="ecos"] .bento-item--feature .waves { --wave-1: #A8ECDB; --wave-2: #F08A84; --wave-3: #FFFFFF; }
.bento-item--feature .bento-title { font-size: clamp(1.7rem, 2.8vw, 2.5rem); letter-spacing: -.035em; }
.bento-item--feature .bento-text { color: var(--rail-muted); font-size: 1.02rem; max-width: 34ch; }
.bento-item--feature .bento-icon { background: rgb(255 255 255 / .1); color: var(--rail-accent); }
.bento-item--feature .bento-stat { background: var(--rail-accent-bg); color: var(--rail-accent); font-size: .82rem; }
.bento-item--feature .bento-arrow { background: rgb(255 255 255 / .1); color: var(--rail-ink); }
@media (max-width: 1240px) { .bento { grid-template-columns: repeat(2, minmax(0, 1fr)); } .bento-item--feature { grid-row: auto; } }
@media (max-width: 600px) { .bento { grid-template-columns: 1fr; } .bento-item--feature { grid-column: auto; } }

/* ---------- 10. Speakers ---------- */
.speaker-grid { list-style: none; margin: 0; padding: 0; display: grid; gap: 16px; grid-template-columns: repeat(auto-fill, minmax(min(100%, 240px), 1fr)); }
.speaker-link {
  height: 100%; display: flex; flex-direction: column; gap: 18px;
  padding: 26px 22px 24px; border-radius: var(--radius-l);
  background: var(--surface); border: 1px solid var(--line);
  color: var(--ink); text-decoration: none; box-shadow: var(--shadow-1);
  transition: transform .4s var(--ease-out), box-shadow .35s, border-color .35s;
}
.speaker-link:hover { transform: translateY(-6px); box-shadow: var(--shadow-2); border-color: color-mix(in srgb, var(--brand-a) 45%, var(--line)); text-decoration: none; }
.speaker-photo, .speaker-portrait {
  position: relative; width: 112px; aspect-ratio: 1; border-radius: 50%;
  display: grid; place-items: center; flex: none;
  background: linear-gradient(135deg, var(--brand-a-soft), var(--brand-b-soft));
}
.speaker-photo::after, .speaker-portrait::after {
  content: ""; position: absolute; inset: -5px; border-radius: 50%; padding: 2px;
  background: conic-gradient(from var(--ring, 0deg), var(--wave-1), var(--wave-2), var(--wave-3), var(--wave-1));
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude;
  transition: --ring 1.2s var(--ease-out);
}
.speaker-link:hover .speaker-photo::after { --ring: 240deg; }
.speaker-photo img, .speaker-portrait img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; border-radius: 50%; }
.speaker-initials { font: 700 2.1rem/1 var(--font-display); color: var(--brand-a-strong); }
.speaker-body { display: grid; gap: 4px; }
.speaker-honorific { font-size: .76rem; letter-spacing: .12em; text-transform: uppercase; color: var(--muted); }
.speaker-name { font: 680 1.3rem/1.15 var(--font-display); letter-spacing: -.02em; }
.speaker-aff { color: var(--ink-2); font-size: .93rem; line-height: 1.4; }
.speaker-place { color: var(--muted); font-size: .88rem; }
.speaker-lecture { margin-top: 8px; padding-top: 12px; border-top: 1px solid var(--line); font-size: .95rem; line-height: 1.45; color: var(--brand-a-strong); font-weight: 500; }
@property --ring { syntax: "<angle>"; inherits: false; initial-value: 0deg; }

.speaker-detail { display: grid; gap: clamp(28px, 5vw, 64px); grid-template-columns: minmax(220px, 300px) minmax(0, 1fr); padding-block: clamp(32px, 4vw, 56px); align-items: start; }
.speaker-card { position: sticky; top: calc(var(--topbar-h) + 24px); display: grid; gap: 22px; justify-items: start; padding: 24px; border-radius: var(--radius-xl); background: var(--surface); border: 1px solid var(--line); box-shadow: var(--shadow-1); }
.speaker-portrait { width: min(220px, 100%); }
.speaker-facts { list-style: none; margin: 0; padding: 0; display: grid; gap: 6px; color: var(--ink-2); }
.speaker-facts li:first-child { font-weight: 600; color: var(--ink); }
.speaker-detail > .prose { padding: clamp(22px, 3.4vw, 44px); border-radius: var(--radius-xl); background: var(--surface); border: 1px solid var(--line); box-shadow: var(--shadow-1); }
@media (max-width: 860px) { .speaker-detail { grid-template-columns: 1fr; } .speaker-card { position: static; grid-template-columns: auto 1fr; align-items: center; } .speaker-portrait { width: 120px; } }

/* ---------- 11. Inner page header ---------- */
.page-hero {
  position: relative; isolation: isolate; overflow: hidden;
  margin-top: calc(-1 * (var(--topbar-h) + env(safe-area-inset-top, 0px)));
  padding: calc(var(--topbar-h) + env(safe-area-inset-top, 0px) + clamp(28px, 4vw, 56px)) 0 clamp(32px, 4.4vw, 60px);
  min-height: clamp(260px, 30vw, 380px);
  display: flex; flex-direction: column; justify-content: flex-end;
  background:
    radial-gradient(60% 80% at 90% 0%, color-mix(in srgb, var(--brand-a) 34%, transparent), transparent 70%),
    linear-gradient(180deg, var(--sky-top), color-mix(in srgb, var(--sky-mid) 70%, transparent) 60%, transparent);
  color: var(--hero-ink);
}
.page-hero-art { position: absolute; z-index: -1; pointer-events: none; }
[data-brand="cpote"] .page-hero-art {
  right: -2%; top: calc(var(--topbar-h) - 4px); width: min(50%, 760px);
  opacity: .55; filter: saturate(.7) contrast(.92);
  -webkit-mask-image: radial-gradient(120% 115% at 100% 30%, #000 30%, rgb(0 0 0 / .55) 55%, transparent 78%);
  mask-image: radial-gradient(120% 115% at 100% 30%, #000 30%, rgb(0 0 0 / .55) 55%, transparent 78%);
}
[data-theme="dark"][data-brand="cpote"] .page-hero-art { opacity: .38; }
[data-brand="cpote"] .page-hero-art img { width: 100%; }
[data-brand="ecos"] .page-hero { background: #06343F; }
[data-brand="ecos"] .page-hero-art { inset: 0; }
[data-brand="ecos"] .page-hero-art img { width: 100%; height: 100%; object-fit: cover; object-position: 60% 32%; }
[data-brand="ecos"] .page-hero-art::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(90deg, rgb(4 47 58 / .95) 0%, rgb(8 73 90 / .78) 45%, rgb(8 73 90 / .35) 100%), linear-gradient(0deg, rgb(3 32 40 / .6), transparent 60%);
}
@media (prefers-reduced-motion: no-preference) {
  .page-hero-art img { animation: art-fade 1.2s var(--ease-out) both; }
  @keyframes art-fade { from { opacity: 0; transform: translateX(3%) scale(1.03); } to { opacity: 1; transform: none; } }
}
.page-hero-inner { position: relative; }
.crumbs { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-bottom: 16px; font-size: .86rem; color: var(--hero-ink-2); }
.crumbs a { color: var(--hero-ink); text-decoration: none; font-weight: 600; }
.crumbs a:hover { text-decoration: underline; }
.crumb-sep { opacity: .45; }
[data-brand="ecos"] .page-hero .eyebrow { color: #A8ECDB; }
.page-title { max-width: 20ch; font-size: clamp(2.2rem, 5vw, 4.2rem); font-weight: 760; letter-spacing: -.045em; line-height: 1.0; view-transition-name: page-title; }
[data-brand="cpote"] .page-title { color: #14325A; }
[data-theme="dark"][data-brand="cpote"] .page-title, [data-theme="dark"][data-brand="cpote"] .hero-word { color: var(--ink); }
.page-title--long { max-width: 30ch; font-size: clamp(1.7rem, 3.2vw, 2.7rem); letter-spacing: -.03em; line-height: 1.12; }
.page-lead { max-width: 60ch; margin: 16px 0 0; font-size: clamp(1.02rem, 1.4vw, 1.18rem); color: var(--hero-ink-2); }
.page-hero .chips { margin-top: 18px; }
.chips--hero .chip { background: color-mix(in srgb, var(--surface) 60%, transparent); border-color: color-mix(in srgb, var(--hero-ink) 12%, transparent); color: var(--hero-ink); -webkit-backdrop-filter: blur(8px); backdrop-filter: blur(8px); }
[data-brand="ecos"] .chips--hero .chip { background: rgb(255 255 255 / .1); border-color: rgb(255 255 255 / .2); }
@media (max-width: 760px) {
  [data-brand="cpote"] .page-hero-art { width: 130%; right: -40%; opacity: .45; }
  .page-hero { min-height: 0; }
}

.page-body { padding-block: clamp(24px, 3.4vw, 44px) clamp(28px, 4vw, 56px); }
.page-card {
  max-width: 980px; padding: clamp(22px, 4vw, 56px);
  border-radius: var(--radius-xl); background: var(--surface); border: 1px solid var(--line); box-shadow: var(--shadow-1);
}

/* ---------- 12. Prose (archived content) ---------- */
.prose { min-width: 0; color: var(--ink-2); }
.prose:not(.page-card):not(.about-body) { max-width: 78ch; }
.prose--wide { max-width: none !important; }
.prose > :first-child { margin-top: 0; }
.prose > :last-child { margin-bottom: 0; }
.prose h2, .prose h3, .prose h4, .prose h5, .prose h6 { color: var(--ink); margin: 2em 0 .7em; }
.prose h2 { font-size: clamp(1.5rem, 2.4vw, 2rem); font-weight: 720; letter-spacing: -.03em; }
.prose h3 { font-size: 1.32rem; font-weight: 680; }
.prose h4 { font-size: 1.1rem; font-weight: 680; letter-spacing: -.01em; }
.prose h5, .prose h6 { font: 600 .8rem/1.3 var(--font-body); letter-spacing: .12em; text-transform: uppercase; color: var(--muted); }
.prose p, .prose ul, .prose ol, .prose dl, .prose address, .prose blockquote { margin: 0 0 1.1em; }
.prose ul, .prose ol { padding-left: 1.3em; }
.prose li { margin: .3em 0; }
.prose li::marker { color: var(--brand-b-strong); }
.prose strong, .prose b { color: var(--ink); font-weight: 650; }
.prose address { font-style: normal; }
.prose hr { border: 0; height: 1px; background: var(--line); margin: 2em 0; }
.prose img { border-radius: var(--radius-s); }
.prose blockquote { padding: 4px 0 4px 18px; border-left: 3px solid var(--brand-b); color: var(--ink); }
.prose a[data-file] { font-weight: 600; }
.prose a[data-file]::after {
  content: attr(data-file); display: inline-block; margin-left: .45em; padding: 2px 6px; border-radius: 5px;
  background: var(--brand-a-soft); color: var(--brand-a-strong);
  font: 600 .66rem/1.2 var(--font-mono); letter-spacing: .04em; vertical-align: .18em;
}
.prose .table-wrap { margin: 0 0 1.4em; overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
.prose table { width: 100%; border-collapse: collapse; font-size: .95rem; }
.prose th, .prose td { padding: 12px 16px; text-align: left; vertical-align: top; border-bottom: 1px solid var(--line); }
.prose th { background: var(--surface-2); color: var(--ink); font-weight: 600; font-size: .84rem; letter-spacing: .02em; }
.prose tr:last-child td { border-bottom: 0; }
.prose tbody tr:hover td { background: color-mix(in srgb, var(--brand-a-soft) 50%, transparent); }
.prose .grid { display: grid; gap: 14px; grid-template-columns: repeat(auto-fit, minmax(min(100%, 220px), 1fr)); margin: 0 0 1.4em; }
.prose .grid > div { min-width: 0; }
.prose .grid > div:has(> a > img, > img) { padding: 18px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface-2); transition: transform .3s var(--ease-out), border-color .3s; }
.prose .grid > div:has(> a > img, > img):hover { transform: translateY(-3px); border-color: var(--brand-a); }
.prose .grid > div > a > img, .prose .grid > div > img { max-height: 96px; width: auto; margin-bottom: 12px; object-fit: contain; }
.prose .grid > div h4 { margin: .2em 0 .2em; font-size: 1.02rem; }
.prose .grid > div p { margin: 0; font-size: .9rem; color: var(--muted); }
.prose .card { border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); overflow: hidden; margin: 0 0 1.4em; }
.prose .card > :not(.card-title) { padding-inline: 18px; }
.prose .card p { margin: .7em 0; }
.prose .card hr { margin: .2em 0; }
.prose .card > :first-child:not(.card-title) { margin-top: .7em; }
.prose .card-title { padding: 12px 18px; background: var(--surface-2); color: var(--ink); font-weight: 650; border-bottom: 1px solid var(--line); }
.prose .note { margin: 0 0 1.4em; padding: 14px 18px; border-radius: var(--radius); background: var(--brand-a-soft); color: var(--ink); border: 1px solid color-mix(in srgb, var(--brand-a) 30%, transparent); }
.prose .note > :last-child { margin-bottom: 0; }
.prose--abstract { font-size: 1.06rem; line-height: 1.75; color: var(--ink); }

/* ---------- 13. Book of abstracts ---------- */
.boa { padding-block: clamp(24px, 3vw, 44px) clamp(48px, 6vw, 88px); }
.boa-keynotes { margin-bottom: 32px; }
.keynote-strip { list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; grid-template-columns: repeat(auto-fill, minmax(min(100%, 260px), 1fr)); }
.keynote-strip a { display: grid; gap: 4px; height: 100%; padding: 14px 18px; border-radius: var(--radius); background: var(--surface); border: 1px solid var(--line); text-decoration: none; color: var(--ink); transition: border-color .2s, transform .3s var(--ease-out); }
.keynote-strip a:hover { border-color: var(--brand-a-strong); transform: translateY(-2px); }
.keynote-strip span { color: var(--muted); font-size: .9rem; line-height: 1.4; }
.boa-tools, .programme-tools {
  position: sticky; top: calc(var(--topbar-h) + env(safe-area-inset-top, 0px)); z-index: 5;
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 12px 24px;
  margin: 0 calc(-1 * var(--gutter)) 18px; padding: 12px var(--gutter);
  background: color-mix(in srgb, var(--paper) 86%, transparent);
  -webkit-backdrop-filter: blur(14px); backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}
.search { flex: 1 1 360px; display: flex; align-items: center; gap: 10px; padding: 0 18px; min-height: 52px; border-radius: 999px; background: var(--surface); border: 1px solid var(--line-strong); color: var(--muted); box-shadow: var(--shadow-1); }
.search:focus-within { border-color: var(--brand-a-strong); box-shadow: 0 0 0 4px color-mix(in srgb, var(--brand-a) 22%, transparent); }
.search svg { width: 20px; height: 20px; flex: none; }
.search input { flex: 1; min-width: 0; border: 0; outline: 0; background: transparent; color: var(--ink); font: inherit; font-size: 1rem; }
.search--compact { flex: 0 1 320px; min-height: 44px; }
.boa-count { margin: 0; font: 500 .86rem/1 var(--font-mono); color: var(--muted); }
.abstract-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.abstract-row a {
  display: grid; grid-template-columns: 9.5rem minmax(0, 1fr); gap: 4px 20px; padding: 18px 20px;
  color: var(--ink); text-decoration: none; border-radius: var(--radius);
  background: var(--surface); border: 1px solid var(--line);
  transition: border-color .2s, transform .3s var(--ease-out), box-shadow .3s;
}
.abstract-row a:hover { border-color: color-mix(in srgb, var(--brand-a) 55%, var(--line)); transform: translateX(4px); box-shadow: var(--shadow-1); }
.abstract-row .code { grid-row: span 3; padding-top: .3em; }
.abstract-title { font: 620 1.06rem/1.35 var(--font-display); letter-spacing: -.01em; }
.abstract-row a:hover .abstract-title { color: var(--brand-a-strong); }
.abstract-authors { color: var(--muted); font-size: .92rem; }
.abstract-session { font-size: .8rem; color: var(--brand-b-strong); font-weight: 600; }
@media (max-width: 640px) { .abstract-row a { grid-template-columns: 1fr; } .abstract-row .code { grid-row: auto; padding: 0; } }
.empty-state { padding: 48px 0; text-align: center; color: var(--muted); }
.boa-note { margin-top: 40px; font-size: .92rem; color: var(--muted); }

.abstract { display: grid; gap: clamp(24px, 4vw, 48px); grid-template-columns: minmax(0, 1fr) minmax(240px, 300px); padding-block: clamp(28px, 4vw, 52px); align-items: start; }
.abstract > :first-child { padding: clamp(22px, 3.4vw, 44px); border-radius: var(--radius-xl); background: var(--surface); border: 1px solid var(--line); box-shadow: var(--shadow-1); min-width: 0; }
.authors { margin-bottom: 32px; padding-bottom: 24px; border-bottom: 1px solid var(--line); }
.author-list { list-style: none; margin: 0 0 12px; padding: 0; display: flex; flex-wrap: wrap; gap: 4px 0; font: 600 1.1rem/1.4 var(--font-display); color: var(--ink); }
.author-list li:not(:last-child)::after { content: ","; margin-right: .4em; }
.author-list sup, .affiliations sup { font: 600 .68em var(--font-mono); color: var(--brand-b-strong); margin-left: 1px; }
.affiliations { list-style: none; margin: 0; padding: 0; display: grid; gap: 4px; color: var(--muted); font-size: .92rem; }
.affiliations sup { margin-right: 6px; }
.keywords, .acknowledgment { margin-top: 32px; padding-top: 24px; border-top: 1px solid var(--line); }
.acknowledgment p { margin: 0; color: var(--muted); font-size: .94rem; }
.abstract-aside { position: sticky; top: calc(var(--topbar-h) + 24px); display: grid; gap: 14px; }
.presented, .cite { padding: 20px; border-radius: var(--radius-l); background: var(--surface); border: 1px solid var(--line); box-shadow: var(--shadow-1); }
.presented { background: linear-gradient(160deg, var(--brand-a-soft), var(--surface) 70%); }
.presented-when { display: flex; flex-wrap: wrap; gap: 6px 12px; margin: 0 0 8px; }
.presented-session { display: block; margin-bottom: 4px; font: 650 1.05rem/1.3 var(--font-display); }
.presented .muted { margin: 0 0 8px; font-size: .9rem; }
.cite p:last-child { margin: 0; font-size: .9rem; color: var(--muted); }
@media (max-width: 960px) { .abstract { grid-template-columns: 1fr; } .abstract-aside { position: static; } }

.pager { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; padding-bottom: clamp(48px, 6vw, 88px); }
.pager-link { display: grid; gap: 6px; padding: 18px 22px; border-radius: var(--radius-l); background: var(--surface); border: 1px solid var(--line); color: var(--ink); text-decoration: none; font-weight: 600; line-height: 1.35; transition: border-color .2s, transform .3s var(--ease-out), box-shadow .3s; }
.pager-link:hover { border-color: var(--brand-a); transform: translateY(-2px); box-shadow: var(--shadow-1); }
.pager-link--next { text-align: right; }
.pager-dir { font: 500 .76rem/1 var(--font-mono); color: var(--muted); letter-spacing: .04em; }
@media (max-width: 640px) { .pager { grid-template-columns: 1fr; } .pager-link--next { text-align: left; } }

/* ---------- 14. Schedule ---------- */
.callout { display: flex; flex-wrap: wrap; gap: 8px 16px; align-items: center; margin: 0 0 28px; padding: 16px 20px; border-radius: var(--radius-l); background: var(--brand-a-soft); color: var(--ink); }
.timeline-days { list-style: none; margin: 0; padding: 0; display: grid; gap: 18px; grid-template-columns: repeat(auto-fit, minmax(min(100%, 260px), 1fr)); align-items: start; }
.timeline-day { padding: 22px; border-radius: var(--radius-l); background: var(--surface); border: 1px solid var(--line); box-shadow: var(--shadow-1); }
.timeline-date { display: grid; margin-bottom: 18px; font-size: 1.5rem; letter-spacing: -.02em; }
.timeline-date span { font: 600 .74rem/1.4 var(--font-body); letter-spacing: .14em; text-transform: uppercase; color: var(--brand-b-strong); }
.timeline { list-style: none; margin: 0; padding: 0 0 0 14px; border-left: 2px solid var(--line); display: grid; gap: 14px; }
.tl-item { position: relative; display: grid; gap: 2px; }
.tl-item::before { content: ""; position: absolute; left: -21px; top: .45em; width: 12px; height: 12px; border-radius: 50%; background: var(--surface); border: 2px solid var(--line-strong); }
.tl-item--keynote::before { background: var(--brand-b); border-color: var(--brand-b); }
.tl-item--session::before { background: var(--brand-a); border-color: var(--brand-a); }
.tl-item--social::before { border-style: dashed; }
.tl-time { color: var(--muted); font-size: .8rem; }
.tl-title { color: var(--ink); font-weight: 550; line-height: 1.35; }
a.tl-title { color: var(--brand-a-strong); }
.schedule-info { margin-top: 40px; }

.programme { padding-block: clamp(20px, 3vw, 36px) clamp(48px, 6vw, 96px); }
.day-tabs { display: flex; flex-wrap: wrap; gap: 4px; padding: 4px; border-radius: 999px; background: var(--surface-2); border: 1px solid var(--line); }
.day-tabs button {
  min-height: 38px; padding: 8px 16px; border-radius: 999px; border: 0;
  background: transparent; color: var(--ink-2); font: 500 .9rem/1 var(--font-body); cursor: pointer;
  transition: background-color .2s, color .2s;
}
.day-tabs button:hover { color: var(--ink); }
.day-tabs button[aria-selected="true"] { background: var(--surface); color: var(--ink); box-shadow: var(--shadow-1); font-weight: 600; }
.programme-day { margin-top: 28px; }
.programme-day[hidden] { display: none; }
.programme-date { margin-bottom: 18px; font-size: clamp(1.5rem, 3vw, 2.1rem); letter-spacing: -.03em; }
.session-grid { display: grid; gap: 16px; grid-template-columns: repeat(auto-fill, minmax(min(100%, 380px), 1fr)); align-items: start; }
.session { border-radius: var(--radius-l); background: var(--surface); border: 1px solid var(--line); box-shadow: var(--shadow-1); overflow: hidden; scroll-margin-top: calc(var(--topbar-h) + 90px); }
.session:target { outline: 3px solid var(--brand-b); outline-offset: 2px; }
.session-head { padding: 18px 20px 14px; border-bottom: 1px solid var(--line); background: linear-gradient(180deg, var(--surface-2), var(--surface)); }
.session--keynote .session-head { background: linear-gradient(135deg, color-mix(in srgb, var(--brand-b) 20%, var(--surface)), var(--surface)); }
.session-time { margin: 0 0 4px; color: var(--brand-a-strong); font-size: .82rem; }
.session-title { font-size: 1.2rem; letter-spacing: -.015em; margin-bottom: 8px; }
.session-notes { margin: 8px 0 0; font-size: .86rem; color: var(--muted); }
.chip--room { font-size: .76rem; padding: 3px 10px; }
.talks { list-style: none; margin: 0; padding: 6px 0; }
.talk { display: grid; grid-template-columns: 6.6rem minmax(0, 1fr); gap: 12px; padding: 10px 20px; border-top: 1px dashed var(--line); }
.talk:first-child { border-top: 0; }
.talk[hidden] { display: none; }
.talk-time { color: var(--muted); font-size: .78rem; padding-top: .25em; }
.talk-body { display: grid; gap: 4px; line-height: 1.4; font-size: .96rem; }
.talk-body a { color: var(--ink); text-decoration: none; font-weight: 550; }
.talk-body a:hover { color: var(--brand-a-strong); text-decoration: underline; }
.talk-meta { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.session--wide { grid-column: 1 / -1; }
.session--wide .talks { columns: 3 340px; column-gap: 0; column-rule: 1px solid var(--line); padding: 6px 0; }
.session--wide .talk { break-inside: avoid; border-top: 0; border-bottom: 1px dashed var(--line); grid-template-columns: 4.6rem minmax(0, 1fr); }
.talk-time:empty { display: none; }
.talk:has(.talk-time:empty) { grid-template-columns: minmax(0, 1fr); }

/* ---------- 15. State pages (closed, 404) ---------- */
.state-page {
  position: relative; isolation: isolate; overflow: hidden;
  margin-top: calc(-1 * (var(--topbar-h) + env(safe-area-inset-top, 0px)));
  min-height: clamp(560px, 88svh, 920px);
  display: flex; align-items: center;
  padding: calc(var(--topbar-h) + 48px) 0 64px;
  background:
    radial-gradient(100% 80% at 80% 20%, color-mix(in srgb, var(--field-a) 22%, transparent), transparent 60%),
    linear-gradient(160deg, var(--night-2), var(--night));
  color: var(--on-night);
}
.state-field { z-index: -1; }
.state-inner { pointer-events: none; }
.state-inner a, .state-inner button { pointer-events: auto; }
.state-code {
  margin: 0; font: 800 clamp(6rem, 20vw, 14rem)/.8 var(--font-display); letter-spacing: -.06em;
  background: linear-gradient(100deg, var(--field-a), var(--field-b)); -webkit-background-clip: text; background-clip: text; color: transparent;
}
.state-title { max-width: 18ch; margin-top: 18px; font-size: clamp(2.2rem, 5vw, 4rem); letter-spacing: -.04em; }
.state-lead { max-width: 58ch; margin: 18px 0 0; color: var(--on-night-muted); font-size: 1.1rem; }
.state-lead a, .state-lead code { color: #fff; }
.state-page .eyebrow { color: var(--field-a); }
.chips--links { margin-top: 28px; }
.chips--links .chip { background: rgb(255 255 255 / .08); color: var(--on-night); border-color: rgb(255 255 255 / .18); }
.chips--links .chip:hover { border-color: var(--field-b); color: #fff; }
.state-page .btn-ghost { color: #fff; }

/* ---------- 16. Unknown conference (standalone page) ---------- */
body.unknown { background: #070D18; color: var(--on-night); }
.unknown-main { position: relative; isolation: isolate; min-height: 100dvh; display: flex; align-items: center; overflow: hidden; padding-block: 64px; }
.unknown-field { z-index: -1; }
.unknown-inner { pointer-events: none; }
.unknown-inner a { pointer-events: auto; }
.unknown-code { display: flex; margin: 0; font: 800 clamp(7rem, 26vw, 19rem)/.8 var(--font-display); letter-spacing: -.035em; color: #fff; }
.unknown-zero { background: linear-gradient(135deg, var(--field-a), var(--field-b)); -webkit-background-clip: text; background-clip: text; color: transparent; }
@media (prefers-reduced-motion: no-preference) { .unknown-zero { animation: breathe 5s ease-in-out infinite; display: inline-block; } }
@keyframes breathe { 50% { transform: scale(1.04) rotate(-2deg); filter: drop-shadow(0 0 40px color-mix(in srgb, var(--field-b) 50%, transparent)); } }
.unknown-title { max-width: 20ch; margin-top: 24px; font-size: clamp(2rem, 4.6vw, 3.6rem); letter-spacing: -.04em; }
.unknown-host { font-family: var(--font-mono); font-size: .62em; letter-spacing: -.02em; padding: .05em .3em; border-radius: 8px; background: rgb(255 255 255 / .08); word-break: break-all; }
.unknown-lead { max-width: 56ch; margin: 20px 0 28px; color: var(--on-night-muted); font-size: 1.1rem; }
.unknown-editions { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; grid-template-columns: repeat(auto-fill, minmax(min(100%, 250px), 1fr)); max-width: 900px; }
.unknown-edition { display: grid; gap: 4px; padding: 16px 18px; border-radius: var(--radius); background: rgb(255 255 255 / .05); border: 1px solid rgb(255 255 255 / .12); color: #fff; text-decoration: none; -webkit-backdrop-filter: blur(8px); backdrop-filter: blur(8px); transition: transform .3s var(--ease-out), border-color .3s; }
.unknown-edition:hover { transform: translateY(-3px); border-color: #98B234; }
.unknown-edition--ecos:hover { border-color: #45B89D; }
.unknown-edition-name { font: 600 1.25rem/1.1 var(--font-display); }
.unknown-edition-name strong { color: #98B234; }
.unknown-edition--ecos .unknown-edition-name strong { color: #7ED8C3; }
.unknown-edition-meta { font-size: .86rem; color: var(--on-night-muted); }

/* ---------- 17. Footer ---------- */
.site-footer {
  position: relative; isolation: isolate; overflow: hidden;
  margin: clamp(24px, 4vw, 48px) clamp(0px, 1.4vw, 16px) clamp(0px, 1.4vw, 16px);
  border-radius: clamp(0px, 2vw, 28px);
  background:
    radial-gradient(80% 60% at 100% 0%, color-mix(in srgb, var(--rail-accent) 14%, transparent), transparent 60%),
    linear-gradient(160deg, var(--rail-bg), var(--rail-bg-2));
  color: var(--rail-muted); font-size: .94rem;
}
.site-footer .waves { position: absolute; left: -5%; right: -5%; top: -30px; width: 110%; height: 140px; z-index: -1; opacity: .5; --wave-1: #9FBDE6; --wave-2: #E26A62; --wave-3: #B9D35A; }
[data-brand="ecos"] .site-footer .waves { --wave-1: #A8ECDB; --wave-2: #F08A84; --wave-3: #FFFFFF; }
.footer-grid { display: grid; gap: 36px 44px; grid-template-columns: minmax(220px, 1.1fr) minmax(260px, 1.8fr) minmax(170px, 1fr) minmax(170px, 1fr); padding-block: clamp(72px, 8vw, 112px) 36px; }
.footer-acronym { margin: 0 0 10px; font: 750 clamp(1.8rem, 2.6vw, 2.4rem)/1 var(--font-display); letter-spacing: -.04em; color: #fff; }

.footer-title { margin: 0 0 6px; color: var(--rail-ink); font: 500 1.05rem/1.35 var(--font-display); max-width: 34ch; }
.footer-meta { margin: 0 0 20px; }
.archive-note { display: flex; gap: 10px; align-items: baseline; margin: 0; padding: 12px 14px; border-radius: var(--radius-s); background: rgb(255 255 255 / .06); border: 1px solid rgb(255 255 255 / .1); font-size: .86rem; line-height: 1.45; }
.archive-note .status-dot { transform: translateY(-1px); }
.footer-heading { margin: 0 0 14px; font: 600 .74rem/1.2 var(--font-body); letter-spacing: .14em; text-transform: uppercase; color: var(--rail-ink); }
.footer-heading:not(:first-child) { margin-top: 28px; }
.site-footer a { color: var(--rail-ink); text-decoration: none; }
.site-footer a:hover { color: #fff; text-decoration: underline; }
.organizers { display: grid; gap: 24px; }
.organizer { display: flex; flex-direction: column; gap: 14px; align-items: flex-start; }
.organizer address { flex: 1; min-width: 0; font-style: normal; line-height: 1.5; }
.organizer-logo { flex: none; height: clamp(64px, 6vw, 84px); width: auto; max-width: min(100%, 300px); object-fit: contain; object-position: left center; filter: brightness(0) invert(1); opacity: .9; }
.organizer address strong { color: var(--rail-ink); font-weight: 600; }
.editions { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; }
.edition { display: grid; padding: 10px 12px; border-radius: var(--radius-s); border: 1px solid rgb(255 255 255 / .12); line-height: 1.15; transition: border-color .25s, background-color .25s, transform .3s var(--ease-out); }
.edition:hover { text-decoration: none !important; border-color: rgb(255 255 255 / .4); transform: translateY(-2px); }
.edition.is-current { background: rgb(255 255 255 / .1); border-color: var(--rail-accent); }
.edition-name { font-size: .72rem; letter-spacing: .12em; text-transform: uppercase; color: var(--rail-muted); }
.edition-year { font: 700 1.25rem/1.1 var(--font-display); color: #fff; }
.edition--cpote .edition-year { color: #C9DE83; }
.edition--ecos .edition-year { color: #A8ECDB; }
.footer-bottom { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px; padding-block: 20px calc(24px + env(safe-area-inset-bottom, 0px)); border-top: 1px solid rgb(255 255 255 / .1); font-size: .84rem; }
@media (max-width: 1240px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 640px) { .footer-grid { grid-template-columns: 1fr; } }

/* ---------- 18. Dialogs: concluded + quick search ---------- */
.closed-dialog {
  width: min(520px, calc(100vw - 32px)); padding: 0; border: 0; border-radius: var(--radius-xl);
  background: var(--surface); color: var(--ink); box-shadow: 0 40px 120px -20px rgb(0 0 0 / .6);
}
.closed-dialog::backdrop, .palette::backdrop { background: rgb(5 10 20 / .5); -webkit-backdrop-filter: blur(6px); backdrop-filter: blur(6px); }
.closed-dialog[open], .palette[open] { animation: pop .35s var(--ease-out); }
@keyframes pop { from { opacity: 0; transform: translateY(12px) scale(.97); } }
.closed-dialog-body { padding: 32px 32px 28px; }
.closed-dialog h2 { font-size: 1.75rem; letter-spacing: -.03em; margin-bottom: 14px; }
.closed-dialog p { margin: 0 0 12px; color: var(--ink-2); }
.closed-dialog .eyebrow { color: var(--brand-b-strong); }
.closed-icon { width: 52px; height: 52px; margin-bottom: 18px; color: var(--brand-b); }
.closed-dialog-actions { display: flex; justify-content: flex-end; margin-top: 22px; }

.palette {
  width: min(680px, calc(100vw - 24px)); max-height: min(640px, calc(100dvh - 24px));
  margin: 10vh auto auto; padding: 0; border: 0; border-radius: 22px;
  background: var(--surface); color: var(--ink);
  box-shadow: 0 0 0 1px var(--line), 0 40px 120px -20px rgb(0 0 0 / .6);
  overflow: hidden;
}
.palette-box { display: flex; flex-direction: column; max-height: inherit; }
.palette-field { display: flex; align-items: center; gap: 12px; padding: 0 18px; border-bottom: 1px solid var(--line); color: var(--muted); }
.palette-field svg { width: 22px; height: 22px; flex: none; }
.palette-field input { flex: 1; min-width: 0; height: 62px; border: 0; outline: 0; background: transparent; color: var(--ink); font: 500 1.08rem/1 var(--font-body); }
.palette-field input::-webkit-search-cancel-button { display: none; }
.palette-results { overflow-y: auto; overscroll-behavior: contain; padding: 8px; min-height: 120px; }
.palette-group { margin: 10px 10px 6px; font: 600 .7rem/1 var(--font-body); letter-spacing: .14em; text-transform: uppercase; color: var(--muted); }
.palette-item {
  display: grid; grid-template-columns: auto minmax(0, 1fr); gap: 2px 12px; align-items: center;
  padding: 10px 12px; border-radius: 12px; color: var(--ink); text-decoration: none;
}
.palette-item[aria-selected="true"] { background: var(--brand-a-soft); }
.palette-item:hover { text-decoration: none; }
.palette-kind { grid-row: span 2; width: 34px; height: 34px; display: grid; place-items: center; border-radius: 10px; background: var(--surface-2); color: var(--brand-a-strong); font: 600 .62rem/1 var(--font-mono); letter-spacing: .02em; }
.palette-item[aria-selected="true"] .palette-kind { background: var(--brand-a-strong); color: #fff; }
.palette-title { font-weight: 600; line-height: 1.3; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.palette-sub { font-size: .84rem; color: var(--muted); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.palette-title mark { background: color-mix(in srgb, var(--brand-b) 35%, transparent); color: inherit; border-radius: 3px; padding: 0 1px; }
.palette-empty { padding: 32px 16px; text-align: center; color: var(--muted); }
.palette-foot { display: flex; gap: 16px; margin: 0; padding: 10px 18px; border-top: 1px solid var(--line); font-size: .78rem; color: var(--muted); background: var(--surface-2); }
.palette-foot kbd { margin-right: 4px; }
.palette-scope { margin-left: auto; }
@media (max-width: 640px) { .palette { margin-top: 12px; } .palette-foot span:not(.palette-scope) { display: none; } }

/* ---------- 19. Scroll reveal & page transitions ---------- */
@supports (animation-timeline: view()) {
  @media (prefers-reduced-motion: no-preference) {
    .view-reveal { animation: view-in linear both; animation-timeline: view(); animation-range: entry 0% cover 20%; }
    @keyframes view-in { from { opacity: .1; transform: translateY(32px) scale(.97); } to { opacity: 1; transform: none; } }
  }
}
@view-transition { navigation: auto; }
::view-transition-old(root), ::view-transition-new(root) { animation-duration: .25s; }
.rail { view-transition-name: rail; }
.topbar { view-transition-name: topbar; }
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; scroll-behavior: auto !important; }
  .wave { stroke-dasharray: none; stroke-dashoffset: 0; }
}

img.is-broken { display: none; }

/* ---------- 20. Print ---------- */
@media print {
  .rail, .rail-scrim, .topbar, .site-footer, .boa-tools, .programme-tools, .pager, .closed-dialog, .palette, .hero-art, .page-hero-art, .hero-stats-wrap { display: none !important; }
  .stage { margin: 0; }
  body { background: #fff; color: #000; }
  .hero, .page-hero { min-height: 0; margin: 0; padding: 0 0 16px; background: none; color: #000; }
  .hero-title, .page-title, .hero-word { color: #000 !important; }
  .page-card, .about-body, .abstract > :first-child { box-shadow: none; border: 0; padding: 0; }
  a { color: #000; }
}

@media (max-width: 700px) {
  .hero-stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .hero-stat { padding: 14px 16px 16px; }
  .hero-title { font-size: clamp(3.4rem, 17vw, 6rem); }
}

/* =====================================================================
   21. Display settings: WCAG contrast levels (html[data-contrast])
   - "A"   (no attribute): the standard design; WCAG level A has no colour-contrast criterion,
           body text still meets 4.5:1 on plain backgrounds.
   - "aa":  every text >= 4.5:1 (large text >= 3:1), including text over photos and glass.
   - "aaa": every text >= 7:1 (large >= 4.5:1), no decorative motion behind content,
           opaque surfaces, stronger borders, underlined links, thicker focus ring.
   ===================================================================== */
/* ---- AA ---- */
:root[data-contrast]:not([data-theme="dark"]) {
  --muted: #4A596D;
  --year-grad: linear-gradient(100deg, #2C5A96 0%, #3F6CA6 45%, #4D7414 95%);
  --rail-muted: #CFDCEC;
}
:root[data-contrast][data-brand="ecos"]:not([data-theme="dark"]) { --rail-muted: #E4F5F7; }
:root[data-contrast][data-theme="dark"] { --muted: #B3C1D2; --rail-muted: #D3DEEC; }
[data-contrast] .page-field { opacity: .5; }
[data-contrast] .topbar-status-sub, [data-contrast] kbd, [data-contrast] .crumb-sep { opacity: 1; }
[data-contrast] .rail-group ul a, [data-contrast] .rail-meta, [data-contrast] .rail-count, [data-contrast] .rail-chev { color: var(--rail-muted); }
[data-contrast] .hero-status, [data-contrast] .hero-facts li, [data-contrast] .hero-stat, [data-contrast] .chips--hero .chip, [data-contrast] .btn-glass { background: var(--surface); -webkit-backdrop-filter: none; backdrop-filter: none; }
[data-contrast][data-brand="ecos"] .hero-status, [data-contrast][data-brand="ecos"] .hero-facts li, [data-contrast][data-brand="ecos"] .hero-stat,
[data-contrast][data-brand="ecos"] .chips--hero .chip, [data-contrast][data-brand="ecos"] .hero .btn-glass { background: rgb(3 32 40 / .88); border-color: rgb(255 255 255 / .45); }
[data-contrast][data-brand="ecos"] .hero-art::after { background: linear-gradient(90deg, rgb(3 32 40 / .96) 0%, rgb(4 47 58 / .88) 55%, rgb(4 47 58 / .45) 100%), linear-gradient(0deg, rgb(3 32 40 / .95), transparent 50%); }
[data-contrast][data-brand="ecos"] .page-hero-art::after { background: linear-gradient(90deg, rgb(3 32 40 / .97) 0%, rgb(4 47 58 / .9) 60%, rgb(4 47 58 / .6) 100%); }
[data-contrast][data-brand="ecos"] .text-grad { background: none; color: var(--brand-a-strong); }
[data-contrast][data-brand="cpote"] .page-hero-art { opacity: .35; }
[data-contrast] ::placeholder { color: var(--muted); opacity: 1; }

/* ---- AAA ---- */
:root[data-contrast="aaa"]:not([data-theme="dark"]) {
  --paper: #FFFFFF; --surface: #FFFFFF; --surface-2: #EEF2F7;
  --ink: #050B14; --ink-2: #111B29; --muted: #2B3747;
  --line: #7A879A; --line-strong: #4C596B;
  --brand-a-strong: #1B3F70; --brand-b-strong: #374A08; --link: #1B3F70; --focus: #050B14;
  --brand-a-soft: #E3EBF6; --brand-b-soft: #ECF3D6;
  --sky-top: #FFFFFF; --sky-mid: #FFFFFF;
  --year-grad: linear-gradient(100deg, #1B3F70, #1B3F70);
  --rail-bg: #0A1F3A; --rail-bg-2: #0A1F3A; --rail-muted: #E8EFF8; --rail-ink: #FFFFFF; --rail-accent: #E4F2A6; --rail-accent-bg: rgb(228 242 166 / .2);
}
:root[data-contrast="aaa"][data-brand="ecos"]:not([data-theme="dark"]) {
  --paper: #FFFFFF; --surface-2: #EBF4F3; --line: #6F8C8A; --line-strong: #436260;
  --brand-a-strong: #053C4A; --brand-b-strong: #0B4A3D; --link: #053C4A; --brand-b: #7ED8C3; --on-brand-b: #03181C;
  --rail-bg: #053845; --rail-bg-2: #053845; --rail-muted: #EAF8F8; --rail-accent: #C9F7EA; --rail-accent-bg: rgb(201 247 234 / .2);
}
:root[data-contrast="aaa"][data-theme="dark"] {
  --paper: #000A14; --surface: #08131F; --surface-2: #0E1C2C;
  --ink: #FFFFFF; --ink-2: #EEF3F9; --muted: #C9D4E1;
  --line: #5F708A; --line-strong: #8696AE;
  --brand-a-strong: #C3D7F3; --brand-b-strong: #D6EA86; --link: #C3D7F3; --focus: #FFFFFF;
  --rail-bg: #030D1A; --rail-bg-2: #030D1A; --rail-muted: #E8EFF8; --rail-ink: #FFFFFF;
}
:root[data-contrast="aaa"][data-theme="dark"][data-brand="ecos"] {
  --paper: #000C0E; --surface: #061719; --surface-2: #0B2225;
  --brand-a-strong: #B2ECF3; --brand-b-strong: #B5F0E2; --link: #B2ECF3; --brand-b: #7ED8C3; --on-brand-b: #03181C;
  --rail-bg: #021F26; --rail-bg-2: #021F26;
}
[data-contrast="aaa"] .page-field, [data-contrast="aaa"] .hero-sky::after, [data-contrast="aaa"] .waves { display: none; }
[data-contrast="aaa"][data-brand="cpote"] .page-hero-art { opacity: .18; }
[data-contrast="aaa"][data-brand="cpote"] .hero-word, [data-contrast="aaa"][data-brand="cpote"] .page-title { color: var(--ink); }
[data-contrast="aaa"][data-brand="ecos"] .hero-art::after, [data-contrast="aaa"][data-brand="ecos"] .page-hero-art::after { background: rgb(2 24 30 / .93); }
[data-contrast="aaa"][data-brand="ecos"] .hero-year { background: none; color: #C9F7EA; }
[data-contrast="aaa"] .text-grad { background: none; color: var(--brand-a-strong); }
[data-contrast="aaa"] .prose a, [data-contrast="aaa"] .page-lead a, [data-contrast="aaa"] .state-lead a, [data-contrast="aaa"] .talk-body a, [data-contrast="aaa"] .link-arrow {
  text-decoration: underline !important; text-decoration-thickness: 2px !important; background: none !important;
}
[data-contrast="aaa"] :focus-visible { outline-width: 4px; outline-offset: 2px; }
[data-contrast="aaa"] .topbar, [data-contrast="aaa"] .topbar.is-scrolled { background: var(--paper); -webkit-backdrop-filter: none; backdrop-filter: none; box-shadow: 0 1px 0 var(--line-strong); }
[data-brand="ecos"][data-contrast="aaa"] .topbar:not(.is-scrolled), [data-contrast="aaa"] .stage:has(> main > .state-page:first-child) .topbar { color: var(--ink); }
[data-contrast="aaa"] .bento-link, [data-contrast="aaa"] .speaker-link, [data-contrast="aaa"] .page-card, [data-contrast="aaa"] .about-body, [data-contrast="aaa"] .session,
[data-contrast="aaa"] .abstract-row a, [data-contrast="aaa"] .pager-link, [data-contrast="aaa"] .hero-stat { border: 1px solid var(--line-strong); box-shadow: none; }
[data-contrast="aaa"] .bento-link { background: var(--surface); }
[data-contrast="aaa"] .bento-item--feature .bento-link { background: var(--rail-bg); }
[data-contrast="aaa"] .bento-text, [data-contrast="aaa"] .speaker-place, [data-contrast="aaa"] .abstract-authors { color: var(--ink-2); }
[data-contrast="aaa"] .state-field { display: none; }
[data-contrast="aaa"] .state-page { background: var(--rail-bg); }
[data-contrast="aaa"] .state-code { background: none; color: #FFFFFF; }
[data-contrast="aaa"] .state-lead, [data-contrast="aaa"] .state-page .eyebrow { color: #FFFFFF; }
[data-contrast="aaa"] .chips--links .chip { background: rgb(0 0 0 / .35); border-color: rgb(255 255 255 / .7); color: #FFFFFF; }

/* ---------- 22. Display settings panel ---------- */
.display-btn svg { width: 20px; height: 20px; }
.display-panel {
  position: fixed; inset: calc(var(--topbar-h) + env(safe-area-inset-top, 0px) - 4px) max(var(--gutter), 12px) auto auto;
  width: min(340px, calc(100vw - 24px)); margin: 0; padding: 18px;
  border: 1px solid var(--line); border-radius: 20px;
  background: var(--surface); color: var(--ink); box-shadow: var(--shadow-2);
}
.display-panel:popover-open { animation: pop .25s var(--ease-out); }
.display-panel h2 { margin: 0 0 4px; font: 650 1.05rem/1.2 var(--font-display); letter-spacing: -.01em; }
.display-group { margin: 14px 0 0; padding: 0; border: 0; }
.display-group legend { padding: 0; margin-bottom: 8px; font: 600 .72rem/1.2 var(--font-body); letter-spacing: .14em; text-transform: uppercase; color: var(--muted); }
.segmented { display: grid; grid-auto-flow: column; grid-auto-columns: 1fr; gap: 4px; padding: 4px; border-radius: 14px; background: var(--surface-2); border: 1px solid var(--line); }
.segmented button {
  display: grid; justify-items: center; gap: 2px; padding: 8px 6px; border: 0; border-radius: 10px;
  background: transparent; color: var(--ink-2); font: 600 .86rem/1.1 var(--font-body); cursor: pointer;
  transition: background-color .2s, color .2s, box-shadow .2s;
}
.segmented button small { font-weight: 500; font-size: .7rem; color: var(--muted); }
.segmented button:hover { color: var(--ink); }
.segmented button[aria-pressed="true"] { background: var(--surface); color: var(--ink); box-shadow: var(--shadow-1), 0 0 0 2px var(--brand-a-strong); }
.display-note { margin: 12px 0 0; font-size: .8rem; line-height: 1.45; color: var(--muted); }

/* =====================================================================
   23. Past conferences: stats, host countries, timeline
   ===================================================================== */
.history { padding-block: clamp(24px, 3.4vw, 44px) clamp(48px, 6vw, 96px); }
.history-stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); gap: 12px; margin: 0 0 clamp(36px, 5vw, 64px); }
.history-stat {
  position: relative; overflow: hidden; padding: 20px 22px 22px; border-radius: var(--radius-l);
  background: var(--surface); border: 1px solid var(--line); box-shadow: var(--shadow-1);
}
.history-stat::before { content: ""; position: absolute; left: 22px; right: 22px; top: 0; height: 3px; border-radius: 3px; background: linear-gradient(90deg, var(--wave-1), var(--wave-2), var(--wave-3)); }
.history-stat dt { font-size: .74rem; letter-spacing: .14em; text-transform: uppercase; color: var(--muted); }
.history-stat dd { margin: 6px 0 0; font: 780 clamp(2.4rem, 4.4vw, 3.6rem)/1 var(--font-display); letter-spacing: -.045em; font-variant-numeric: tabular-nums; color: var(--brand-a-strong); }

.hosts { margin: 0 0 clamp(40px, 6vw, 80px); padding: clamp(22px, 3.4vw, 40px); border-radius: var(--radius-xl);
  background:
    radial-gradient(70% 90% at 100% 0%, color-mix(in srgb, var(--rail-accent) 22%, transparent), transparent 60%),
    linear-gradient(160deg, var(--rail-bg), var(--rail-bg-2));
  color: var(--rail-ink); }
.hosts .eyebrow { color: var(--rail-accent); }
.hosts .section-title { color: #fff; }
.hosts-list { list-style: none; margin: 22px 0 0; padding: 0; display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.host { display: inline-flex; align-items: center; gap: 10px; padding: 8px 8px 8px 16px; border-radius: 999px; background: rgb(255 255 255 / .08); border: 1px solid rgb(255 255 255 / .16); transition: transform .3s var(--ease-out), background-color .3s; }
.host:hover { transform: translateY(-3px); background: rgb(255 255 255 / .14); }
.host-name { font-weight: 600; }
.host-count { min-width: 28px; height: 28px; display: grid; place-items: center; padding: 0 8px; border-radius: 999px; background: var(--rail-accent-bg); color: var(--rail-accent); font: 700 .8rem/1 var(--font-mono); }
.host--1 .host-name { font-size: .92rem; }
.host--2 .host-name { font-size: 1.05rem; }
.host--3 .host-name { font-size: 1.2rem; }
.host--4 .host-name { font-size: 1.4rem; font-family: var(--font-display); }

.history-legend { display: flex; align-items: center; gap: 10px; margin: 0; color: var(--muted); font-size: .9rem; }
.legend-dot { width: 14px; height: 14px; border-radius: 50%; flex: none; }
.legend-dot--archive { background: var(--brand-b); box-shadow: 0 0 0 4px color-mix(in srgb, var(--brand-b) 25%, transparent); }

/* the timeline: a centre line that fills up while you scroll, cards alternating left / right */
.tl2 { --node: 18px; position: relative; list-style: none; margin: 0; padding: 8px 0 0; display: grid; gap: 22px; }
.tl2::before, .tl2::after { content: ""; position: absolute; top: 0; bottom: 0; left: 50%; width: 3px; margin-left: -1.5px; border-radius: 3px; }
.tl2::before { background: var(--line); }
.tl2::after { background: linear-gradient(180deg, var(--wave-1), var(--wave-2) 50%, var(--wave-3)); transform-origin: 50% 0; transform: scaleY(1); }
@supports (animation-timeline: view()) {
  @media (prefers-reduced-motion: no-preference) {
    .tl2::after { animation: tl2-fill linear both; animation-timeline: view(); animation-range: entry 40% exit 60%; }
    @keyframes tl2-fill { from { transform: scaleY(0); } to { transform: scaleY(1); } }
  }
}
.tl2-item { position: relative; display: grid; grid-template-columns: minmax(0, 1fr) 64px minmax(0, 1fr); align-items: start; }
.tl2-item--left .tl2-card { grid-column: 1; }
/* stagger: on wide screens each card starts halfway down the previous one (they sit on opposite sides) */
@media (min-width: 961px) { .tl2-item + .tl2-item { margin-top: calc(-1 * clamp(40px, 4vw, 64px)); } /* < half of the shortest card, so cards on the same side never overlap */ }
.tl2-item--right .tl2-card { grid-column: 3; }
.tl2-node {
  grid-column: 2; grid-row: 1; justify-self: center; margin-top: 30px; z-index: 1;
  width: var(--node); height: var(--node); border-radius: 50%;
  background: var(--surface); border: 3px solid var(--brand-a);
  box-shadow: 0 0 0 6px var(--paper);
}
.tl2-item.is-archived .tl2-node { border-color: var(--brand-b); background: var(--brand-b); }
.tl2-item.is-current .tl2-node { width: 26px; height: 26px; margin-top: 26px; border-color: var(--brand-c); background: var(--brand-c); box-shadow: 0 0 0 6px var(--paper), 0 0 0 12px color-mix(in srgb, var(--brand-c) 25%, transparent); }
@media (prefers-reduced-motion: no-preference) {
  .tl2-item.is-current .tl2-node { animation: node-pulse 2.4s var(--ease-out) infinite; }
  @keyframes node-pulse { 50% { box-shadow: 0 0 0 6px var(--paper), 0 0 0 18px color-mix(in srgb, var(--brand-c) 0%, transparent); } }
}
.tl2-item--left .tl2-card::after, .tl2-item--right .tl2-card::after { /* connector to the line */
  content: ""; position: absolute; top: 38px; width: 32px; height: 2px; background: var(--line-strong);
}
.tl2-item--left .tl2-card::after { right: -33px; }
.tl2-item--right .tl2-card::after { left: -33px; }

.tl2-card {
  position: relative; isolation: isolate; overflow: visible;
  padding: 22px 24px; border-radius: var(--radius-l);
  border: 1px solid transparent;
  background: linear-gradient(var(--surface), var(--surface)) padding-box, linear-gradient(var(--line), var(--line)) border-box;
  box-shadow: var(--shadow-1);
  transition: transform .45s var(--ease-out), box-shadow .35s;
}
.tl2-card:hover {
  transform: translateY(-4px); box-shadow: var(--shadow-2);
  background: linear-gradient(var(--surface), var(--surface)) padding-box, linear-gradient(135deg, var(--wave-1), var(--wave-2) 50%, var(--wave-3)) border-box;
}
.tl2-year {
  position: absolute; z-index: -1; top: -6px; right: 14px; pointer-events: none; user-select: none;
  font: 800 clamp(3.6rem, 6vw, 5.6rem)/1 var(--font-display); letter-spacing: -.05em;
  color: transparent; -webkit-text-stroke: 1.5px color-mix(in srgb, var(--brand-a) 45%, transparent);
  opacity: .7; transition: opacity .35s, -webkit-text-stroke-color .35s;
}
.tl2-card:hover .tl2-year { -webkit-text-stroke-color: var(--brand-a); opacity: 1; }
.tl2-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 8px; }
.tl2-ord, .tl2-flag, .tl2-here { display: inline-block; padding: 3px 9px; border-radius: 999px; font: 600 .72rem/1.3 var(--font-body); letter-spacing: .06em; text-transform: uppercase; }
.tl2-ord { background: var(--brand-a-soft); color: var(--brand-a-strong); }
.tl2-flag { background: var(--brand-b-soft); color: var(--brand-b-strong); }
.tl2-here { background: var(--brand-c); color: #fff; }
.tl2-title { max-width: 80%; font-size: clamp(1.35rem, 2vw, 1.7rem); font-weight: 720; letter-spacing: -.03em; }
.tl2-meta { display: flex; flex-wrap: wrap; gap: 4px 16px; margin: 10px 0 0; color: var(--ink-2); font-size: .93rem; }
.tl2-meta span { display: inline-flex; align-items: center; gap: 6px; }
.tl2-meta svg { width: 16px; height: 16px; color: var(--brand-a-strong); }
.tl2-desc { margin: 10px 0 0; color: var(--ink-2); font-size: .95rem; line-height: 1.55; }
.tl2-people { list-style: none; margin: 12px 0 0; padding: 12px 0 0; border-top: 1px dashed var(--line); display: grid; gap: 2px; color: var(--muted); font-size: .86rem; line-height: 1.45; }
.tl2-actions { display: flex; flex-wrap: wrap; gap: 8px; margin: 16px 0 0; }
.tl2-actions .btn { min-height: 40px; padding: 8px 16px; font-size: .88rem; }

.tl2-item.is-current .tl2-card {
  background:
    radial-gradient(90% 90% at 100% 0%, color-mix(in srgb, var(--rail-accent) 26%, transparent), transparent 60%) padding-box,
    linear-gradient(160deg, var(--rail-bg), var(--rail-bg-2)) padding-box,
    linear-gradient(135deg, var(--wave-1), var(--wave-2) 50%, var(--wave-3)) border-box;
  color: var(--rail-ink);
}
.tl2-item.is-current .tl2-desc, .tl2-item.is-current .tl2-meta { color: var(--rail-muted); }
.tl2-item.is-current .tl2-meta svg { color: var(--rail-accent); }
.tl2-item.is-current .tl2-ord { background: rgb(255 255 255 / .12); color: #fff; }
.tl2-item.is-current .tl2-year { -webkit-text-stroke-color: rgb(255 255 255 / .35); }
.tl2-item.is-later .tl2-card { opacity: .92; }

.tl2-decade { position: sticky; top: calc(var(--topbar-h) + 10px); z-index: 2; display: flex; justify-content: center; pointer-events: none; }
.tl2-decade span {
  padding: 6px 16px; border-radius: 999px; pointer-events: auto;
  background: var(--ink); color: var(--paper);
  font: 750 .95rem/1.2 var(--font-display); letter-spacing: -.01em;
  box-shadow: 0 0 0 6px var(--paper), var(--shadow-1);
}
.tl2-origin { position: relative; display: grid; justify-items: center; gap: 10px; padding-top: 18px; text-align: center; }
.tl2-origin-dot { position: relative; z-index: 1; width: 34px; height: 34px; border-radius: 50%; background: radial-gradient(circle, var(--brand-b) 35%, var(--brand-a) 36% 60%, transparent 61%); box-shadow: 0 0 0 8px var(--paper); }
.tl2-origin p { margin: 0; padding: 8px 16px; border-radius: 999px; background: var(--surface); border: 1px solid var(--line); font: 600 .95rem/1.3 var(--font-display); color: var(--ink-2); }
.history-outro { margin-top: clamp(40px, 6vw, 72px); }
.history-outro .page-card { max-width: none; }
.history-outro img { margin: 8px 0 24px; }

/* entrance: cards slide in from their side of the line */
@supports (animation-timeline: view()) {
  @media (prefers-reduced-motion: no-preference) {
    .tl2-item .tl2-card { animation: tl2-in linear both; animation-timeline: view(); animation-range: entry 0% cover 25%; }
    .tl2-item--left .tl2-card { --from: -40px; }
    .tl2-item--right .tl2-card { --from: 40px; }
    @keyframes tl2-in { from { opacity: 0; transform: translateX(var(--from, 0)) scale(.97); } to { opacity: 1; transform: none; } }
  }
}

@media (max-width: 960px) {
  .tl2::before, .tl2::after { left: 17px; }
  .tl2-item { grid-template-columns: 36px minmax(0, 1fr); column-gap: 14px; }
  .tl2-item--left .tl2-card, .tl2-item--right .tl2-card { grid-column: 2; }
  .tl2-node { grid-column: 1; }
  .tl2-item--left .tl2-card::after, .tl2-item--right .tl2-card::after { left: -16px; right: auto; width: 14px; }
  .tl2-decade { justify-content: flex-start; }
  .tl2-origin { justify-items: start; padding-left: 0; }
  .tl2-item--left .tl2-card { --from: 30px; }
}
[data-contrast="aaa"] .tl2-card { border: 1px solid var(--line-strong); box-shadow: none; }
[data-contrast="aaa"] .tl2-year { display: none; }
[data-contrast] .hosts { background: var(--rail-bg); }

/* ---------- portal version (pipeline build number) ---------- */
.app-version {
  display: inline-flex; align-items: center; gap: 6px; padding: 2px 8px; border-radius: 999px;
  border: 1px solid color-mix(in srgb, currentColor 22%, transparent);
  font: 500 .72rem/1.5 var(--font-mono); white-space: nowrap; vertical-align: middle;
}
.app-version-label { font-family: var(--font-body); font-weight: 600; font-size: .62rem; letter-spacing: .12em; text-transform: uppercase; opacity: .7; }
.app-version--topbar { margin-left: 12px; opacity: .85; }
.app-version--footer { opacity: .9; }
.unknown-version { margin: 28px 0 0; color: var(--on-night-muted); }
@media (max-width: 1280px) { .app-version--topbar { display: none; } }