/* standalone reset */
  ul, ol { margin: 0; padding: 0; list-style: none; }
  button { font: inherit; color: inherit; }

  /* ============================ TOKENS ============================ */
  :root {
    /* light — warm desert paper */
    --bg:        #F3ECE0;
    --bg-2:      #EAE0D0;
    --surface:   #FBF7EF;
    --surface-2: #F1E9DB;
    --ink:       #211B27;
    --ink-soft:  #635A66;
    --ink-faint: #8C8390;
    --line:      rgba(33,27,39,0.12);
    --line-soft: rgba(33,27,39,0.07);

    --amber:  #C6812E;
    --terra:  #C0552A;
    --dusk:   #6A5691;
    --sage:   #5C7C69;

    --tint-terra: rgba(192,85,42,0.10);
    --tint-dusk:  rgba(106,86,145,0.11);
    --tint-sage:  rgba(92,124,105,0.12);
    --tint-amber: rgba(198,129,46,0.12);

    --shadow: 0 1px 2px rgba(33,27,39,0.04), 0 12px 32px -14px rgba(33,27,39,0.18);
    --radius: 14px;

    --serif: ui-serif, "New York", Georgia, "Times New Roman", serif;
    --sans:  ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --mono:  ui-monospace, "SF Mono", "SFMono-Regular", Menlo, Consolas, monospace;

    --maxw: 1180px;
    --gutter: clamp(1.25rem, 4vw, 3.5rem);
  }
  @media (prefers-color-scheme: dark) {
    :root {
      --bg:        #141019;
      --bg-2:      #0D0A12;
      --surface:   #1E1826;
      --surface-2: #241D2E;
      --ink:       #F1E8DA;
      --ink-soft:  #B3A6B4;
      --ink-faint: #7E7385;
      --line:      rgba(241,232,218,0.13);
      --line-soft: rgba(241,232,218,0.07);

      --amber:  #F0AE5B;
      --terra:  #E27B48;
      --dusk:   #A78FD1;
      --sage:   #86A88F;

      --tint-terra: rgba(226,123,72,0.13);
      --tint-dusk:  rgba(167,143,209,0.15);
      --tint-sage:  rgba(134,168,143,0.13);
      --tint-amber: rgba(240,174,91,0.14);

      --shadow: 0 1px 2px rgba(0,0,0,0.3), 0 18px 44px -18px rgba(0,0,0,0.6);
    }
  }
  /* explicit toggle overrides (viewer stamps data-theme on :root) */
  :root[data-theme="light"] {
    --bg:#F3ECE0; --bg-2:#EAE0D0; --surface:#FBF7EF; --surface-2:#F1E9DB;
    --ink:#211B27; --ink-soft:#635A66; --ink-faint:#8C8390;
    --line:rgba(33,27,39,0.12); --line-soft:rgba(33,27,39,0.07);
    --amber:#C6812E; --terra:#C0552A; --dusk:#6A5691; --sage:#5C7C69;
    --tint-terra:rgba(192,85,42,0.10); --tint-dusk:rgba(106,86,145,0.11);
    --tint-sage:rgba(92,124,105,0.12); --tint-amber:rgba(198,129,46,0.12);
    --shadow:0 1px 2px rgba(33,27,39,0.04),0 12px 32px -14px rgba(33,27,39,0.18);
  }
  :root[data-theme="dark"] {
    --bg:#141019; --bg-2:#0D0A12; --surface:#1E1826; --surface-2:#241D2E;
    --ink:#F1E8DA; --ink-soft:#B3A6B4; --ink-faint:#7E7385;
    --line:rgba(241,232,218,0.13); --line-soft:rgba(241,232,218,0.07);
    --amber:#F0AE5B; --terra:#E27B48; --dusk:#A78FD1; --sage:#86A88F;
    --tint-terra:rgba(226,123,72,0.13); --tint-dusk:rgba(167,143,209,0.15);
    --tint-sage:rgba(134,168,143,0.13); --tint-amber:rgba(240,174,91,0.14);
    --shadow:0 1px 2px rgba(0,0,0,0.3),0 18px 44px -18px rgba(0,0,0,0.6);
  }

  /* a self-contained dark stage — used for hero, atlas band, join band.
     re-declares tokens so nested components render on the night ground
     regardless of the page theme. */
  .stage-dark {
    --bg:#141019; --bg-2:#0D0A12; --surface:#211A2B; --surface-2:#271F33;
    --ink:#F3EADD; --ink-soft:#C1B4C4; --ink-faint:#8B7F93;
    --line:rgba(243,234,221,0.14); --line-soft:rgba(243,234,221,0.07);
    --amber:#F2B366; --terra:#E88151; --dusk:#B098DA; --sage:#8FB198;
    --tint-terra:rgba(232,129,81,0.15); --tint-dusk:rgba(176,152,218,0.16);
    --tint-sage:rgba(143,177,152,0.14); --tint-amber:rgba(242,179,102,0.15);
    background: var(--bg);
    color: var(--ink);
  }

  /* ============================ BASE ============================ */
  * { box-sizing: border-box; }
  html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
  @media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
  body {
    margin: 0;
    background: var(--bg);
    color: var(--ink);
    font-family: var(--sans);
    font-size: clamp(1rem, 0.97rem + 0.15vw, 1.075rem);
    line-height: 1.62;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
  }
  h1, h2, h3, h4 { font-family: var(--serif); font-weight: 600; line-height: 1.08;
    letter-spacing: -0.012em; text-wrap: balance; margin: 0; }
  p { margin: 0; }
  a { color: inherit; text-decoration: none; }
  img, svg { display: block; max-width: 100%; }

  .wrap { max-width: var(--maxw); margin-inline: auto; padding-inline: var(--gutter); }
  section { padding-block: clamp(4.5rem, 9vw, 8rem); }

  .eyebrow {
    font-family: var(--mono);
    font-size: 0.74rem;
    letter-spacing: 0.22em;
    text-transform: uppercase;
    color: var(--terra);
    display: inline-flex; align-items: center; gap: 0.6rem;
    margin: 0;
  }
  .eyebrow::before {
    content: ""; width: 1.6rem; height: 1px;
    background: currentColor; opacity: 0.6;
  }
  .section-head { max-width: 44ch; margin-bottom: clamp(2.5rem, 5vw, 3.75rem); }
  .section-head h2 { font-size: clamp(2rem, 1.4rem + 2.4vw, 3.1rem); margin-top: 1rem; }
  .section-head p { margin-top: 1.1rem; color: var(--ink-soft); font-size: 1.08rem; max-width: 52ch; }

  .grad-text {
    background: linear-gradient(105deg, var(--amber) 0%, var(--terra) 45%, var(--dusk) 100%);
    -webkit-background-clip: text; background-clip: text;
    -webkit-text-fill-color: transparent; color: transparent;
  }

  /* buttons */
  .btn {
    font-family: var(--sans); font-size: 0.95rem; font-weight: 550;
    display: inline-flex; align-items: center; gap: 0.55rem;
    padding: 0.8rem 1.4rem; border-radius: 100px; cursor: pointer;
    border: 1px solid transparent; transition: transform .18s ease, box-shadow .2s ease, background .2s ease, border-color .2s ease;
    white-space: nowrap;
  }
  .btn svg { width: 1.05em; height: 1.05em; }
  .btn-primary {
    color: #1a1119;
    background: linear-gradient(100deg, var(--amber), var(--terra) 78%);
    box-shadow: 0 6px 20px -8px var(--terra);
  }
  .btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 26px -10px var(--terra); }
  .btn-ghost { color: var(--ink); border-color: var(--line); background: transparent; }
  .btn-ghost:hover { border-color: var(--terra); color: var(--terra); transform: translateY(-2px); }
  .arrow-link { color: var(--terra); font-weight: 550; display: inline-flex; align-items: center; gap: 0.4rem; }
  .arrow-link svg { width: 1em; transition: transform .2s ease; }
  .arrow-link:hover svg { transform: translateX(4px); }

  /* ============================ HEADER ============================ */
  header.site {
    position: sticky; top: 0; z-index: 50;
    background: color-mix(in srgb, var(--bg) 82%, transparent);
    backdrop-filter: blur(14px) saturate(1.2);
    -webkit-backdrop-filter: blur(14px) saturate(1.2);
    border-bottom: 1px solid var(--line-soft);
  }
  .nav { display: flex; align-items: center; gap: 2rem; height: 68px; }
  .brand { display: flex; align-items: center; gap: 0.7rem; font-family: var(--serif);
    font-weight: 600; font-size: 1.04rem; letter-spacing: -0.01em; }
  .brand .mark { width: 30px; height: 30px; flex: none; }
  .brand small { display: block; font-family: var(--mono); font-weight: 400;
    font-size: 0.6rem; letter-spacing: 0.24em; color: var(--ink-faint); text-transform: uppercase; }
  .nav-links { display: flex; gap: 1.6rem; margin-left: auto; }
  .nav-links a { font-size: 0.92rem; color: var(--ink-soft); position: relative; padding: 0.3rem 0; transition: color .18s; }
  .nav-links a:hover { color: var(--ink); }
  .nav-links a::after { content:""; position:absolute; left:0; bottom:-2px; height:1.5px; width:0;
    background: var(--terra); transition: width .22s ease; }
  .nav-links a:hover::after { width: 100%; }
  .nav-cta { margin-left: 0.4rem; }
  .nav-toggle { display: none; margin-left: auto; background: none; border: 0; color: var(--ink);
    cursor: pointer; padding: 0.4rem; }

  @media (max-width: 860px) {
    .nav-links, .nav-cta { display: none; }
    .nav-toggle { display: inline-flex; }
    .nav-links.open {
      display: flex; flex-direction: column; gap: 0.2rem;
      position: absolute; top: 68px; left: 0; right: 0;
      background: var(--bg); border-bottom: 1px solid var(--line);
      padding: 0.8rem var(--gutter) 1.4rem;
    }
    .nav-links.open a { padding: 0.7rem 0; font-size: 1.05rem; border-bottom: 1px solid var(--line-soft); }
  }

  /* ============================ HERO ============================ */
  .hero { position: relative; overflow: hidden; padding-block: 0; }
  .hero canvas { position: absolute; inset: 0; width: 100%; height: 100%; z-index: 0; }
  .hero::after { /* dusk vignette + horizon glow */
    content:""; position:absolute; inset:0; z-index:1; pointer-events:none;
    background:
      radial-gradient(120% 80% at 78% -10%, rgba(242,179,102,0.18), transparent 55%),
      radial-gradient(90% 70% at 15% 115%, rgba(176,152,218,0.16), transparent 60%),
      linear-gradient(180deg, transparent 55%, var(--bg) 99%);
  }
  .hero-inner {
    position: relative; z-index: 2;
    max-width: var(--maxw); margin-inline: auto; padding: clamp(5rem,11vw,8.5rem) var(--gutter) clamp(4.5rem,8vw,7rem);
  }
  .hero h1 {
    font-size: clamp(2.85rem, 1.9rem + 4.6vw, 5.6rem);
    letter-spacing: -0.022em; max-width: 15.5ch; margin-top: 1.7rem;
  }
  .hero .lede { margin-top: 1.9rem; max-width: 50ch; font-size: clamp(1.08rem, 1.02rem + 0.4vw, 1.3rem);
    color: var(--ink-soft); line-height: 1.55; }
  .hero-actions { margin-top: 2.4rem; display: flex; gap: 0.9rem; flex-wrap: wrap; }
  .hero-meta { margin-top: 3.4rem; display: flex; flex-wrap: wrap; gap: 1.5rem 2.6rem;
    padding-top: 1.7rem; border-top: 1px solid var(--line); max-width: 640px; }
  .hero-meta div { display: flex; flex-direction: column; }
  .hero-meta b { font-family: var(--serif); font-size: 1.5rem; font-weight: 600; }
  .hero-meta span { font-family: var(--mono); font-size: 0.68rem; letter-spacing: 0.16em;
    text-transform: uppercase; color: var(--ink-faint); margin-top: 0.25rem; }

  /* ============================ PILLARS ============================ */
  .pillars { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px;
    background: var(--line); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
  .pillar { background: var(--bg); padding: clamp(1.6rem, 3vw, 2.4rem); }
  .pillar .n { font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.2em; color: var(--terra); }
  .pillar h3 { font-size: 1.4rem; margin: 1rem 0 0.6rem; }
  .pillar p { color: var(--ink-soft); font-size: 0.98rem; }
  .pillar .ico { width: 30px; height: 30px; color: var(--terra); margin-bottom: 1.1rem; stroke-width: 1.4; }
  @media (max-width: 760px) { .pillars { grid-template-columns: 1fr; } }

  /* ============================ STATS ============================ */
  .stats-band { border-block: 1px solid var(--line); background: var(--bg-2); }
  .stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: clamp(1.5rem,3vw,2rem); }
  .stat { text-align: left; }
  .stat b { font-family: var(--serif); font-weight: 600; font-variant-numeric: tabular-nums;
    font-size: clamp(2.6rem, 2rem + 2.4vw, 3.9rem); line-height: 1; letter-spacing: -0.02em;
    display: block; background: linear-gradient(120deg, var(--terra), var(--dusk));
    -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
  .stat span { display: block; margin-top: 0.7rem; color: var(--ink-soft); font-size: 0.95rem; max-width: 22ch; }
  @media (max-width: 760px) { .stats { grid-template-columns: repeat(2,1fr); gap: 2.2rem 1.5rem; } }

  /* ============================ RESEARCH GRID ============================ */
  .cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.25rem; }
  @media (max-width: 900px) { .cards { grid-template-columns: repeat(2,1fr); } }
  @media (max-width: 620px) { .cards { grid-template-columns: 1fr; } }
  .card {
    background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
    padding: 1.7rem 1.6rem 1.8rem; transition: transform .2s ease, box-shadow .25s ease, border-color .2s ease;
    position: relative; overflow: hidden;
  }
  .card:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: color-mix(in srgb, var(--terra) 45%, var(--line)); }
  .card .badge { width: 46px; height: 46px; border-radius: 12px; display: grid; place-items: center; margin-bottom: 1.2rem; }
  .card .badge svg { width: 24px; height: 24px; stroke-width: 1.5; }
  .card h3 { font-size: 1.28rem; margin-bottom: 0.55rem; }
  .card p { color: var(--ink-soft); font-size: 0.96rem; }
  .card .tag { margin-top: 1.1rem; font-family: var(--mono); font-size: 0.68rem; letter-spacing: 0.14em;
    text-transform: uppercase; color: var(--ink-faint); }
  .c-terra .badge { background: var(--tint-terra); color: var(--terra); }
  .c-dusk  .badge { background: var(--tint-dusk);  color: var(--dusk);  }
  .c-sage  .badge { background: var(--tint-sage);  color: var(--sage);  }
  .c-amber .badge { background: var(--tint-amber); color: var(--amber); }

  /* ============================ ATLAS BAND ============================ */
  .atlas { position: relative; overflow: hidden; }
  .atlas .wrap { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: clamp(2rem,5vw,4.5rem); align-items: center; }
  @media (max-width: 900px) { .atlas .wrap { grid-template-columns: 1fr; } }
  .atlas h2 { font-size: clamp(2rem, 1.5rem + 2vw, 3rem); margin-top: 1rem; }
  .atlas p { color: var(--ink-soft); margin-top: 1.1rem; max-width: 46ch; }
  .atlas-actions { margin-top: 2rem; display: flex; gap: 0.8rem; flex-wrap: wrap; }
  .atlas-feats { margin-top: 2.2rem; display: grid; grid-template-columns: 1fr 1fr; gap: 0.9rem 1.6rem; max-width: 30rem; }
  .atlas-feats li { list-style: none; display: flex; gap: 0.6rem; align-items: flex-start; font-size: 0.94rem; color: var(--ink-soft); }
  .atlas-feats svg { width: 1.1em; height: 1.1em; color: var(--sage); margin-top: 0.28em; flex: none; }
  /* browser mock */
  .browser { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
    box-shadow: var(--shadow); overflow: hidden; }
  .browser-bar { display: flex; align-items: center; gap: 0.5rem; padding: 0.7rem 0.9rem; border-bottom: 1px solid var(--line); }
  .browser-bar i { width: 10px; height: 10px; border-radius: 50%; background: var(--line); display: block; }
  .browser-bar .url { margin-left: 0.6rem; font-family: var(--mono); font-size: 0.72rem; color: var(--ink-faint); }
  .browser-body { padding: 1.1rem 1.1rem 1.4rem; }
  .track { display: flex; align-items: center; gap: 0.7rem; padding: 0.5rem 0; }
  .track .lab { font-family: var(--mono); font-size: 0.66rem; color: var(--ink-faint); width: 4.5rem; flex: none; letter-spacing: 0.04em; }
  .track .lane { flex: 1; height: 26px; }
  .track .lane svg { width: 100%; height: 100%; overflow: visible; }

  /* ============================ RESOURCES ============================ */
  .res-list { display: grid; grid-template-columns: repeat(2,1fr); gap: 1rem; }
  @media (max-width: 720px) { .res-list { grid-template-columns: 1fr; } }
  .res {
    display: flex; gap: 1.1rem; align-items: flex-start;
    background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
    padding: 1.3rem 1.4rem; transition: border-color .2s ease, transform .2s ease;
  }
  .res:hover { border-color: color-mix(in srgb, var(--dusk) 45%, var(--line)); transform: translateY(-3px); }
  .res .ric { width: 40px; height: 40px; flex: none; border-radius: 10px; display: grid; place-items: center;
    background: var(--tint-dusk); color: var(--dusk); }
  .res .ric svg { width: 21px; height: 21px; stroke-width: 1.5; }
  .res h4 { font-family: var(--sans); font-weight: 600; font-size: 1.02rem; letter-spacing: 0; }
  .res p { color: var(--ink-soft); font-size: 0.9rem; margin-top: 0.3rem; }
  .res .meta { margin-top: 0.7rem; font-family: var(--mono); font-size: 0.66rem; letter-spacing: 0.1em;
    text-transform: uppercase; color: var(--ink-faint); }

  /* ============================ MEMBERS ============================ */
  .members { background: var(--bg-2); border-block: 1px solid var(--line); }
  .logo-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--line);
    border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
  @media (max-width: 820px) { .logo-grid { grid-template-columns: repeat(2,1fr); } }
  .logo {
    background: var(--bg-2); min-height: 108px; display: flex; flex-direction: column; justify-content: center;
    gap: 0.15rem; padding: 1.4rem; transition: background .2s ease;
  }
  .logo:hover { background: var(--surface); }
  .logo b { font-family: var(--serif); font-size: 1.05rem; font-weight: 600; letter-spacing: -0.01em; line-height: 1.1; }
  .logo span { font-family: var(--mono); font-size: 0.6rem; letter-spacing: 0.16em; text-transform: uppercase; color: var(--ink-faint); }

  /* ============================ NEWS ============================ */
  .news-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 1.25rem; }
  @media (max-width: 900px) { .news-grid { grid-template-columns: 1fr; } }
  .post { display: flex; flex-direction: column; border: 1px solid var(--line); border-radius: var(--radius);
    overflow: hidden; background: var(--surface); transition: transform .2s ease, box-shadow .25s ease; }
  .post:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
  .post .thumb { height: 8px; background: linear-gradient(90deg, var(--amber), var(--terra) 50%, var(--dusk)); }
  .post .pbody { padding: 1.5rem 1.5rem 1.7rem; display: flex; flex-direction: column; height: 100%; }
  .post .kicker { font-family: var(--mono); font-size: 0.66rem; letter-spacing: 0.14em; text-transform: uppercase;
    color: var(--terra); display: flex; gap: 0.7rem; }
  .post .kicker time { color: var(--ink-faint); }
  .post h3 { font-size: 1.24rem; margin: 0.9rem 0 0.6rem; }
  .post p { color: var(--ink-soft); font-size: 0.94rem; }
  .post .arrow-link { margin-top: auto; padding-top: 1.1rem; font-size: 0.9rem; }

  /* ============================ JOIN ============================ */
  .join { position: relative; overflow: hidden; text-align: center; }
  .join .wrap { position: relative; z-index: 2; }
  .join::before { content:""; position:absolute; inset:0; z-index:1;
    background: radial-gradient(80% 120% at 50% 0%, rgba(242,179,102,0.16), transparent 55%),
                radial-gradient(70% 120% at 80% 110%, rgba(176,152,218,0.18), transparent 60%); }
  .join h2 { font-size: clamp(2.1rem, 1.6rem + 2.2vw, 3.3rem); max-width: 20ch; margin-inline: auto; }
  .join p { color: var(--ink-soft); margin: 1.2rem auto 0; max-width: 48ch; font-size: 1.08rem; }
  .join-actions { margin-top: 2.2rem; display: flex; gap: 0.9rem; justify-content: center; flex-wrap: wrap; }

  /* ============================ FOOTER ============================ */
  footer.site { background: var(--bg-2); border-top: 1px solid var(--line); padding-block: clamp(3.5rem,6vw,5rem) 2.5rem; }
  .foot-top { display: grid; grid-template-columns: 1.4fr repeat(4, 1fr); gap: 2.5rem 1.5rem; }
  @media (max-width: 900px) { .foot-top { grid-template-columns: 1fr 1fr; } }
  @media (max-width: 520px) { .foot-top { grid-template-columns: 1fr; } }
  .foot-brand p { color: var(--ink-soft); font-size: 0.92rem; margin-top: 1rem; max-width: 34ch; }
  .fcol h5 { font-family: var(--mono); font-size: 0.68rem; letter-spacing: 0.16em; text-transform: uppercase;
    color: var(--ink-faint); margin: 0 0 1rem; font-weight: 500; }
  .fcol a { display: block; color: var(--ink-soft); font-size: 0.92rem; padding: 0.32rem 0; transition: color .18s; }
  .fcol a:hover { color: var(--terra); }
  .foot-bot { display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap;
    margin-top: 3rem; padding-top: 1.6rem; border-top: 1px solid var(--line);
    font-family: var(--mono); font-size: 0.72rem; color: var(--ink-faint); letter-spacing: 0.04em; }

  /* reveal on scroll */
  .reveal { opacity: 0; transform: translateY(22px); transition: opacity .7s ease, transform .7s cubic-bezier(.2,.7,.2,1); }
  .reveal.in { opacity: 1; transform: none; }
  @media (prefers-reduced-motion: reduce) {
    .reveal { opacity: 1 !important; transform: none !important; transition: none; }
  }
  :focus-visible { outline: 2px solid var(--terra); outline-offset: 3px; border-radius: 4px; }

  /* ==================== CONFERENCE ==================== */
  .subnav { position: sticky; top: 68px; z-index: 40;
    background: color-mix(in srgb, var(--bg) 88%, transparent);
    backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--line-soft); }
  .subnav-inner { display: flex; align-items: center; gap: 1.4rem; height: 52px; overflow-x: auto; }
  .subnav-title { font-family: var(--mono); font-size: .72rem; letter-spacing: .14em;
    text-transform: uppercase; color: var(--terra); white-space: nowrap; }
  .subnav nav { display: flex; gap: 1.3rem; margin-left: auto; }
  .subnav nav a { font-size: .88rem; color: var(--ink-soft); white-space: nowrap; padding: .3rem 0; transition: color .18s; }
  .subnav nav a:hover { color: var(--ink); }
  .subnav nav a[aria-current="page"] { color: var(--terra); }

  .page-hero { position: relative; overflow: hidden; }
  .page-hero .wrap { position: relative; z-index: 2; padding-block: clamp(3.5rem,7vw,5.5rem); }
  .page-hero h1 { font-size: clamp(2.3rem,1.8rem+2.4vw,3.7rem); margin-top: 1rem; max-width: 20ch; }
  .page-hero .lede { margin-top: 1.15rem; max-width: 54ch; color: var(--ink-soft); font-size: 1.1rem; }
  .breadcrumb { font-family: var(--mono); font-size: .7rem; letter-spacing: .12em; text-transform: uppercase; color: var(--ink-faint); }
  .breadcrumb a { color: var(--ink-faint); } .breadcrumb a:hover { color: var(--terra); }
  .lead-actions { margin-top: 2rem; display: flex; gap: .8rem; flex-wrap: wrap; }

  .facts { display: grid; grid-template-columns: repeat(4,1fr); gap: 1px; background: var(--line);
    border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
  @media (max-width:760px){ .facts { grid-template-columns: 1fr 1fr; } }
  .fact { background: var(--bg); padding: 1.4rem 1.5rem; }
  .fact .k { font-family: var(--mono); font-size: .66rem; letter-spacing: .16em; text-transform: uppercase; color: var(--ink-faint); }
  .fact .v { font-family: var(--serif); font-size: 1.45rem; font-weight: 600; margin-top: .4rem; line-height: 1.12; }
  .fact .s { color: var(--ink-soft); font-size: .86rem; margin-top: .25rem; }

  .split { display: grid; grid-template-columns: 1.05fr .95fr; gap: clamp(2rem,5vw,4rem); align-items: center; }
  @media (max-width:860px){ .split { grid-template-columns: 1fr; } }
  .prose h2 { font-size: clamp(1.8rem,1.4rem+1.8vw,2.6rem); }
  .prose p { color: var(--ink-soft); margin-top: 1rem; }
  .prose p + p { margin-top: .9rem; }

  .agenda { border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
  .agenda + .agenda { margin-top: 1.5rem; }
  .day-head { background: var(--bg-2); padding: 1rem 1.4rem; border-bottom: 1px solid var(--line);
    display: flex; justify-content: space-between; align-items: baseline; gap: 1rem; }
  .day-head h3 { font-size: 1.2rem; }
  .day-head span { font-family: var(--mono); font-size: .72rem; letter-spacing: .12em; text-transform: uppercase; color: var(--ink-faint); }
  .slot { display: grid; grid-template-columns: 8.5rem 1fr; gap: 1.2rem; padding: 1.05rem 1.4rem; border-bottom: 1px solid var(--line-soft); }
  .slot:last-child { border-bottom: 0; }
  .slot .time { font-family: var(--mono); font-size: .82rem; color: var(--terra); font-variant-numeric: tabular-nums; }
  .slot .what b { font-family: var(--sans); font-weight: 600; display: block; }
  .slot .what p { color: var(--ink-soft); font-size: .92rem; margin-top: .2rem; }
  .slot.brk { background: var(--surface-2); }
  .slot.brk .what b { font-weight: 550; color: var(--ink-soft); }
  @media (max-width:600px){ .slot { grid-template-columns: 1fr; gap: .3rem; } }

  .speakers { display: grid; grid-template-columns: repeat(4,1fr); gap: 1.25rem; }
  @media (max-width:900px){ .speakers { grid-template-columns: repeat(2,1fr); } }
  .speaker .avatar { aspect-ratio: 1; border-radius: 14px; overflow: hidden; border: 1px solid var(--line);
    background: linear-gradient(145deg, var(--tint-terra), var(--tint-dusk)); display: grid; place-items: center; }
  .speaker .avatar span { font-family: var(--serif); font-size: 2rem; font-weight: 600; color: var(--terra); opacity: .85; }
  .speaker h4 { font-family: var(--sans); font-size: 1rem; font-weight: 600; margin-top: .8rem; }
  .speaker p { font-size: .85rem; color: var(--ink-soft); margin-top: .15rem; }

  .tiers { display: grid; grid-template-columns: repeat(4,1fr); gap: 1.1rem; }
  @media (max-width:820px){ .tiers { grid-template-columns: 1fr 1fr; } }
  @media (max-width:480px){ .tiers { grid-template-columns: 1fr; } }
  .tier { border: 1px solid var(--line); border-radius: var(--radius); padding: 1.6rem 1.5rem;
    background: var(--surface); display: flex; flex-direction: column; }
  .tier.feature { border-color: var(--terra); box-shadow: var(--shadow); }
  .tier .name { font-family: var(--mono); font-size: .72rem; letter-spacing: .14em; text-transform: uppercase; color: var(--ink-faint); }
  .tier .price { font-family: var(--serif); font-size: 2.3rem; font-weight: 600; margin-top: .6rem; line-height: 1; font-variant-numeric: tabular-nums; }
  .tier .price small { font-size: .85rem; color: var(--ink-faint); font-family: var(--mono); font-weight: 400; }
  .tier ul { margin-top: 1.1rem; display: flex; flex-direction: column; gap: .5rem; flex: 1; }
  .tier li { font-size: .9rem; color: var(--ink-soft); display: flex; gap: .5rem; align-items: flex-start; }
  .tier li svg { width: 1em; height: 1em; color: var(--sage); margin-top: .3em; flex: none; }
  .tier .btn { margin-top: 1.3rem; justify-content: center; }

  .embed-box { border: 1.5px dashed color-mix(in srgb, var(--dusk) 40%, var(--line)); border-radius: var(--radius);
    background: var(--surface-2); padding: clamp(2rem,5vw,3.5rem); text-align: center; }
  .embed-box .badge2 { font-family: var(--mono); font-size: .68rem; letter-spacing: .16em; text-transform: uppercase; color: var(--dusk); }
  .embed-box h3 { font-size: 1.5rem; margin: .8rem 0; }
  .embed-box p { color: var(--ink-soft); max-width: 46ch; margin: 0 auto 1.4rem; }

  .sponsor-tiers { display: flex; flex-direction: column; gap: 2.2rem; }
  .sponsor-row .lvl { text-align: center; font-family: var(--mono); font-size: .7rem; letter-spacing: .18em;
    text-transform: uppercase; color: var(--ink-faint); margin-bottom: 1rem; }
  .sponsor-logos { display: flex; flex-wrap: wrap; gap: 1rem; justify-content: center; }
  .sponsor-logos .slot2 { border: 1px solid var(--line); border-radius: 10px; padding: 1rem 1.9rem;
    font-family: var(--serif); font-weight: 600; color: var(--ink-soft); background: var(--surface); }

  .callout { border-left: 3px solid var(--terra); background: var(--tint-terra);
    border-radius: 0 12px 12px 0; padding: 1.2rem 1.4rem; color: var(--ink-soft); font-size: .95rem; }
  .callout b { color: var(--ink); }
  .map { aspect-ratio: 16/10; border-radius: var(--radius); border: 1px solid var(--line);
    background: linear-gradient(145deg, var(--surface), var(--surface-2)); display: grid; place-items: center;
    color: var(--ink-faint); font-family: var(--mono); font-size: .8rem; text-align: center; padding: 1rem; }

  /* ==================== REGISTRATION APP ==================== */
  .form-wrap { max-width: 720px; }
  .form-card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: clamp(1.5rem,4vw,2.4rem); }
  .field { display: flex; flex-direction: column; gap: .4rem; margin-bottom: 1.1rem; }
  .field label { font-size: .85rem; font-weight: 600; color: var(--ink); }
  .field .req { color: var(--terra); }
  .field input, .field select, .field textarea { font-family: var(--sans); font-size: 1rem; color: var(--ink);
    background: var(--bg); border: 1px solid var(--line); border-radius: 10px; padding: .7rem .85rem; transition: border-color .18s; width: 100%; }
  .field input:focus, .field select:focus, .field textarea:focus { outline: none; border-color: var(--terra); box-shadow: 0 0 0 3px var(--tint-terra); }
  .field textarea { resize: vertical; min-height: 84px; }
  .field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1.1rem; }
  @media (max-width:520px){ .field-row { grid-template-columns: 1fr; } }
  .field.check { flex-direction: row; align-items: flex-start; gap: .6rem; }
  .field.check input { width: 1.15rem; height: 1.15rem; margin-top: .15rem; flex: none; }
  .field.check label { font-weight: 400; color: var(--ink-soft); font-size: .92rem; }
  .summary { display: flex; justify-content: space-between; align-items: baseline; gap: 1rem;
    background: var(--surface-2); border: 1px solid var(--line); border-radius: 12px; padding: 1rem 1.2rem; margin: 1.3rem 0; }
  .summary .lbl { color: var(--ink-soft); font-size: .9rem; }
  .summary .amt { font-family: var(--serif); font-size: 1.9rem; font-weight: 600; font-variant-numeric: tabular-nums; }
  .summary .amt small { font-family: var(--mono); font-size: .7rem; color: var(--ink-faint); font-weight: 400; }
  .notice { font-size: .82rem; color: var(--ink-faint); margin-top: .8rem; }
  .big-ref { font-family: var(--mono); font-size: 1.6rem; letter-spacing: .18em; color: var(--terra);
    background: var(--surface-2); border: 1px dashed color-mix(in srgb, var(--terra) 40%, var(--line));
    border-radius: 12px; padding: 1.1rem; text-align: center; margin: 1.3rem 0; }
  .reg-status { display: inline-flex; align-items: center; gap: .5rem; font-family: var(--mono); font-size: .72rem;
    letter-spacing: .1em; text-transform: uppercase; padding: .3rem .75rem; border-radius: 100px; }
  .reg-status.paid { background: var(--tint-sage); color: var(--sage); }
  .reg-status.pending { background: var(--tint-amber); color: var(--amber); }
  .tbl-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); }
  table.reg { width: 100%; border-collapse: collapse; font-size: .88rem; min-width: 780px; }
  table.reg th, table.reg td { text-align: left; padding: .7rem .9rem; border-bottom: 1px solid var(--line-soft); white-space: nowrap; }
  table.reg th { font-family: var(--mono); font-size: .66rem; letter-spacing: .1em; text-transform: uppercase; color: var(--ink-faint); background: var(--bg-2); position: sticky; top: 0; }
  table.reg tbody tr:hover { background: var(--surface); }
  .admin-stats { display: grid; grid-template-columns: repeat(4,1fr); gap: 1rem; margin-bottom: 2rem; }
  @media (max-width:640px){ .admin-stats { grid-template-columns: 1fr 1fr; } }
  .astat { background: var(--surface); border: 1px solid var(--line); border-radius: 12px; padding: 1.1rem 1.3rem; }
  .astat b { font-family: var(--serif); font-size: 2rem; font-weight: 600; display: block; font-variant-numeric: tabular-nums; }
  .astat span { font-family: var(--mono); font-size: .66rem; letter-spacing: .12em; text-transform: uppercase; color: var(--ink-faint); }
  .mock-banner { background: var(--tint-dusk); color: var(--dusk); text-align: center; font-family: var(--mono);
    font-size: .74rem; letter-spacing: .1em; text-transform: uppercase; padding: .5rem; }

  .field-note { font-size: .8rem; color: var(--ink-faint); }