/* ==========================================================================
   YouTopia Build — design system (Nord, dark)
   Nord palette (arctic, north-bluish) but on a DARK canvas: backgrounds pushed
   below polar-night so the page reads as a dark developer tool. Accents stay
   Nord frost (cyan/teal/blue) + aurora (green/purple) for the four model
   families. Type: Space Grotesk display + Inter body + JetBrains Mono data.
   ========================================================================== */

:root {
  /* Dark canvas — deeper than Nord's polar night for a true dark UI */
  --ink:        #0e1117;     /* canvas, near-black slate */
  --ink-2:      #151a24;     /* raised surface */
  --ink-3:      #1c2330;     /* card */
  --rule:       #232c3d;     /* hairline / border */

  /* Text — Nord snow storm */
  --paper:      #eceff4;     /* nord4 — primary */
  --paper-2:    #c9d2e0;     /* secondary */
  --paper-3:    #7e8aa0;     /* muted */

  /* Nord frost (accent) */
  --accent:     #88c0d0;     /* nord8 — frost cyan, the one accent */
  --accent-2:   #81a1c1;     /* nord9 — frost blue */
  --accent-3:   #8fbcbb;     /* nord10 — frost teal */
  --accent-glow: rgba(136,192,208,0.20);

  /* Nord aurora — model-family legend */
  --fam-gpt:      #88c0d0;   /* nord8 cyan */
  --fam-gemini:   #a3be8c;   /* nord14 green */
  --fam-deepseek: #81a1c1;   /* nord9 blue */
  --fam-qwen:     #b48ead;   /* nord15 purple */

  --ok:   #a3be8c;
  --warn: #ebcb8b;
  --fail: #bf616a;

  /* Type */
  --display: "Space Grotesk", "Inter", system-ui, sans-serif;
  --sans:    "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono:    "JetBrains Mono", "SF Mono", ui-monospace, Menlo, monospace;

  --maxw: 1180px;
  --gut: clamp(20px, 4vw, 56px);
}

/* ---------- reset ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  background: var(--ink);
  color: var(--paper);
  font-family: var(--sans);
  font-size: clamp(16px, 1.05vw + 0.6rem, 18px);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
  padding-top: 68px;
}
body::before {
  content: "";
  position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background:
    radial-gradient(120% 80% at 50% -10%, rgba(136,192,208,0.08), transparent 60%),
    radial-gradient(90% 60% at 50% 110%, rgba(129,161,193,0.06), transparent 60%);
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
::selection { background: var(--accent); color: var(--ink); }

/* ---------- layout ---------- */
.wrap { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 var(--gut); }
.section { padding: clamp(80px, 12vh, 150px) 0; position: relative; scroll-margin-top: 80px; }
.eyebrow {
  font-family: var(--mono);
  font-size: 12px; letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--accent-3); display: inline-flex; align-items: center; gap: 10px;
}
.eyebrow::before { content: ""; width: 22px; height: 1px; background: var(--accent-3); }

/* ---------- typography ---------- */
.display {
  font-family: var(--display);
  font-weight: 500;
  line-height: 1.02; letter-spacing: -0.02em;
  color: var(--paper);
}
.italic { font-weight: 600; }
.gilded { color: var(--accent); }
h2.title {
  font-family: var(--display); font-weight: 500;
  font-size: clamp(30px, 4.2vw, 52px); line-height: 1.05; letter-spacing: -0.02em;
  max-width: 18ch; margin: 18px 0 0;
}
.lede {
  font-size: clamp(17px, 1.4vw, 21px); color: var(--paper-2);
  max-width: 56ch; margin-top: 20px;
}
.mono { font-family: var(--mono); }
.accent { color: var(--accent-3); }
strong { color: var(--paper); font-weight: 600; }

/* ---------- nav ---------- */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 50;
  background: var(--ink);
  border-bottom: 1px solid var(--rule);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.brand { display: flex; align-items: center; gap: 11px; font-family: var(--display); font-size: 20px; letter-spacing: -0.01em; }
.brand .mark {
  width: 26px; height: 26px; border-radius: 50%;
  background: radial-gradient(circle at 35% 30%, var(--accent), var(--accent-2) 70%, var(--accent-3));
  box-shadow: 0 0 0 1px rgba(136,192,208,0.35), 0 0 22px var(--accent-glow);
}
.brand .dot { color: var(--accent-3); }
.nav-links { display: flex; align-items: center; gap: 30px; }
.nav-links a { color: var(--paper-2); font-size: 14.5px; transition: color .2s; }
.nav-links a:hover { color: var(--paper); }
.nav-cta { display: flex; gap: 10px; align-items: center; }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 14.5px; font-weight: 500; padding: 11px 20px;
  border-radius: 9px; border: 1px solid transparent; cursor: pointer;
  transition: transform .15s ease, background .2s, border-color .2s, box-shadow .2s;
  white-space: nowrap;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: var(--accent); color: var(--ink); }
.btn-primary:hover { box-shadow: 0 8px 30px var(--accent-glow); }
.btn-ghost { border-color: var(--rule); color: var(--paper); background: transparent; }
.btn-ghost:hover { border-color: var(--paper-3); background: var(--ink-2); }
.btn svg { width: 16px; height: 16px; }

/* ---------- hero ---------- */
.hero { padding: clamp(60px, 11vh, 130px) 0 clamp(70px, 10vh, 110px); }
.hero-grid { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: clamp(36px, 6vw, 90px); align-items: center; }
.hero h1 { font-size: clamp(40px, 6.2vw, 84px); margin-top: 24px; }
.hero h1 .line { display: block; }
.hero-sub { font-size: clamp(17px, 1.5vw, 21px); color: var(--paper-2); max-width: 46ch; margin: 26px 0 34px; }
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; align-items: center; }

/* copy-command block */
.cmd {
  margin-top: 30px; display: flex; align-items: stretch; gap: 0;
  background: var(--ink-2); border: 1px solid var(--rule); border-radius: 10px;
  max-width: 540px; overflow: hidden;
}
.cmd code { font-family: var(--mono); font-size: 13.5px; padding: 14px 16px; color: var(--paper-2); flex: 1; overflow-x: auto; white-space: nowrap; }
.cmd code .prompt { color: var(--accent-3); }
.cmd-copy { border: none; background: var(--ink-3); color: var(--paper-2); padding: 0 16px; cursor: pointer; font-size: 12.5px; font-family: var(--mono); border-left: 1px solid var(--rule); transition: color .2s, background .2s; display: flex; align-items: center; gap: 7px; }
.cmd-copy:hover { color: var(--accent-3); }
.cmd-copy.copied { color: var(--ok); }

/* hero stat strip */
.hero-stats { display: flex; gap: 38px; margin-top: 44px; flex-wrap: wrap; }
.stat .n { font-family: var(--display); font-size: 34px;  color: var(--paper); }
.stat .l { font-size: 13px; color: var(--paper-3); margin-top: 2px; }

/* ---------- jury chamber (signature) — SVG, scales perfectly ---------- */
.chamber { width: 100%; max-width: 440px; margin: 0 auto; }
.chamber svg { width: 100%; height: auto; overflow: visible; }
.chamber .ring { fill: none; stroke: var(--rule); }
.chamber .ring-dashed { stroke-dasharray: 3 6; }
.chamber .seat-circle {
  fill: var(--ink-3); stroke: var(--rule); stroke-width: 1.5;
  transition: fill .4s ease, stroke .4s ease, filter .4s ease;
}
.chamber .seat-letter { font-family: var(--display); font-size: 26px; fill: var(--paper-2); transition: fill .4s ease; }
.chamber .seat-label { font-family: var(--mono); font-size: 12px; fill: var(--paper-3); letter-spacing: 0.03em; transition: fill .4s ease; }
.chamber .gavel-circle { fill: url(#gavelGrad); stroke: var(--accent); stroke-width: 1.5; filter: drop-shadow(0 0 18px var(--accent-glow)); }
.chamber .gavel-letter { font-family: var(--display); font-size: 34px; fill: var(--ink); }
.chamber .gavel-label { font-family: var(--mono); font-size: 12px; fill: var(--accent-3); letter-spacing: 0.06em; }
.chamber .seat-g.active .seat-circle,
.chamber .seat-g.is-on .seat-circle { stroke: var(--seat-color); fill: var(--ink-2); filter: drop-shadow(0 0 14px color-mix(in srgb, var(--seat-color) 55%, transparent)); }
.chamber .seat-g.active .seat-letter,
.chamber .seat-g.is-on .seat-letter { fill: var(--paper); }
.chamber .seat-g.active .seat-label,
.chamber .seat-g.is-on .seat-label { fill: var(--paper); }

/* ---------- cards / bento ---------- */
.grid { display: grid; gap: 18px; }
.bento { grid-template-columns: repeat(3, 1fr); }
.card {
  background: linear-gradient(180deg, var(--ink-2), var(--ink));
  border: 1px solid var(--rule); border-radius: 14px; padding: 28px;
  transition: border-color .25s, transform .25s;
}
.card:hover { border-color: var(--accent-2); }
.card h3 { font-family: var(--display); font-weight: 500; font-size: 21px; margin: 16px 0 8px; letter-spacing: -0.01em; }
.card p { color: var(--paper-2); font-size: 15px; }
.card .glyph { width: 38px; height: 38px; border-radius: 9px; display: flex; align-items: center; justify-content: center; background: var(--ink-3); border: 1px solid var(--rule); color: var(--accent-3); }
.card .glyph svg { width: 19px; height: 19px; }

/* ---------- pipeline stepper ---------- */
.steps { display: grid; grid-template-columns: repeat(5, 1fr); gap: 0; margin-top: 50px; position: relative; }
.steps::before { content: ""; position: absolute; top: 24px; left: 10%; right: 10%; height: 1px; background: var(--rule); z-index: 0; }
.step { position: relative; z-index: 1; text-align: center; padding: 0 8px; }
.step .dot { width: 48px; height: 48px; border-radius: 50%; margin: 0 auto 14px; background: var(--ink); border: 1.5px solid var(--accent-2); display: flex; align-items: center; justify-content: center; color: var(--accent-3); }
.step .dot svg { width: 20px; height: 20px; }
.step h4 { font-family: var(--display); font-weight: 500; font-size: 18px; }
.step p { font-size: 13px; color: var(--paper-3); margin-top: 5px; }

/* ---------- agents roster ---------- */
.roster { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-top: 46px; }
.agent { background: var(--ink-2); border: 1px solid var(--rule); border-radius: 11px; padding: 18px 18px 16px; position: relative; overflow: hidden; }
.agent::before { content: ""; position: absolute; top: 0; left: 0; right: 0; height: 3px; background: var(--fam, var(--rule)); }
.agent .role { font-family: var(--mono); font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--paper-3); }
.agent .name { font-family: var(--display); font-size: 19px; margin: 4px 0 8px; }
.agent .model { font-family: var(--mono); font-size: 11.5px; color: var(--fam, var(--paper-2)); }
.agent .job { font-size: 13px; color: var(--paper-3); margin-top: 10px; }

/* legend */
.legend { display: flex; gap: 22px; margin-top: 26px; flex-wrap: wrap; font-family: var(--mono); font-size: 12px; color: var(--paper-3); }
.legend span { display: inline-flex; align-items: center; gap: 7px; }
.legend i { width: 10px; height: 10px; border-radius: 2px; }

/* ---------- benchmark ---------- */
.bench-wrap { background: var(--ink-2); border: 1px solid var(--rule); border-radius: 16px; padding: clamp(24px, 4vw, 44px); margin-top: 44px; }
.bench-bar { height: 30px; background: var(--ink-3); border-radius: 6px; overflow: hidden; position: relative; }
.bench-fill { height: 100%; width: 0; border-radius: 6px; transition: width 1.1s cubic-bezier(.2,.8,.2,1); }
.bench-fill.cheaper { background: linear-gradient(90deg, var(--accent-3), var(--accent)); }
.bench-fill.pricier { background: linear-gradient(90deg, var(--rule), #5e6b83); }
.bench-cost { font-family: var(--mono); font-size: 14px; text-align: right; }

/* ---------- benchmark head-to-head ---------- */
.bench-headtohead { background: var(--ink-2); border: 1px solid var(--rule); border-radius: 16px; padding: clamp(20px, 3vw, 36px); margin-top: 44px; }
.hh-grid { display: grid; grid-template-columns: 1.6fr 0.8fr 1fr 1fr; gap: 16px; align-items: center; }
.hh-colhead { padding-bottom: 14px; border-bottom: 1px solid var(--rule); }
.hh-colhead .hh-num { font-family: var(--mono); font-size: 11px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--paper-3); text-align: right; }
.hh-row { padding: 22px 0; border-bottom: 1px solid var(--rule); }
.hh-row:last-of-type { border-bottom: none; }
.hh-row.win { background: linear-gradient(90deg, rgba(136,192,208,0.06), transparent 70%); border-radius: 10px; padding-left: 14px; padding-right: 14px; margin: 0 -14px; }
.hh-who { display: flex; flex-direction: column; gap: 3px; }
.hh-badge { font-family: var(--mono); font-size: 10px; letter-spacing: 0.1em; padding: 2px 7px; border-radius: 4px; width: fit-content; }
.hh-badge.ours { background: var(--accent); color: var(--ink); }
.hh-badge.base { background: var(--ink-3); color: var(--paper-3); border: 1px solid var(--rule); }
.hh-name { font-family: var(--display); font-weight: 500; font-size: 19px; }
.hh-sub { font-size: 12.5px; color: var(--paper-3); }
.hh-num { font-family: var(--mono); font-size: 17px; text-align: right; color: var(--paper-2); }
.hh-num .hh-of { color: var(--paper-3); font-size: 13px; }
.hh-num.hl { color: var(--accent); font-weight: 500; }

/* bar viz under the table */
.hh-bars { margin-top: 28px; padding-top: 24px; border-top: 1px solid var(--rule); display: flex; flex-direction: column; gap: 14px; }
.hh-bar-row { display: grid; grid-template-columns: 140px 1fr 80px; gap: 16px; align-items: center; }
.hh-bar-label { font-family: var(--mono); font-size: 12.5px; color: var(--paper-2); }

/* the delta callout */
.hh-delta { margin-top: 26px; display: flex; align-items: baseline; gap: 14px; flex-wrap: wrap; }
.hh-delta-n { font-family: var(--display); font-weight: 600; font-size: 38px; color: var(--accent); line-height: 1; }
.hh-delta-l { font-size: 14.5px; color: var(--paper-2); }

.note {
  margin-top: 28px; padding: 18px 22px; border-left: 2px solid var(--accent);
  background: rgba(136,192,208,0.06); border-radius: 0 8px 8px 0; font-size: 14.5px; color: var(--paper-2);
}
.note strong { color: var(--paper); }

/* ---------- why / tension ---------- */
.tension { display: grid; grid-template-columns: 1fr auto 1fr; gap: 0; align-items: stretch; margin-top: 50px; }
.tension .col { padding: 30px; }
.tension .col.left { background: var(--ink-2); border: 1px solid var(--rule); border-radius: 14px 0 0 14px; }
.tension .col.right { background: var(--ink-2); border: 1px solid var(--rule); border-radius: 0 14px 14px 0; }
.tension .vs { display: flex; align-items: center; justify-content: center; padding: 0 8px; }
.tension .vs span { font-family: var(--display); font-size: 22px; color: var(--paper-3); }
.tension h3 { font-family: var(--display); font-weight: 500; font-size: 22px; margin-bottom: 8px; }
.tension p { color: var(--paper-2); font-size: 15px; }
.tension .tag { font-family: var(--mono); font-size: 11px; color: var(--fail); letter-spacing: 0.05em; text-transform: uppercase; margin-bottom: 10px; }

/* ---------- tech stack ---------- */
.stack { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 40px; }
.chip { display: flex; flex-direction: column; gap: 4px; padding: 20px 24px; background: var(--ink-2); border: 1px solid var(--rule); border-radius: 12px; min-width: 180px; flex: 1; }
.chip .who { font-family: var(--display); font-size: 19px; }
.chip .what { font-size: 13px; color: var(--paper-3); }
.chip .prize { font-family: var(--mono); font-size: 10.5px; color: var(--accent-3); margin-top: 8px; letter-spacing: 0.04em; }

/* ---------- final cta ---------- */
.finale { text-align: center; }
.finale h2 { font-size: clamp(34px, 5vw, 64px); margin: 16px auto 0; max-width: 16ch; }
.finale .lede { margin-left: auto; margin-right: auto; }
.finale-actions { display: flex; gap: 12px; justify-content: center; margin-top: 34px; flex-wrap: wrap; }

/* ---------- footer ---------- */
footer { border-top: 1px solid var(--rule); padding: 40px 0; margin-top: 40px; }
.foot-inner { display: flex; justify-content: space-between; align-items: center; gap: 20px; flex-wrap: wrap; color: var(--paper-3); font-size: 13.5px; }

/* ---------- reveal ---------- */
[data-reveal] { opacity: 0; transform: translateY(22px); transition: opacity .8s cubic-bezier(.2,.7,.2,1), transform .8s cubic-bezier(.2,.7,.2,1); }
[data-reveal].in { opacity: 1; transform: none; }

/* ---------- responsive ---------- */
@media (max-width: 920px) {
  .hero-grid { grid-template-columns: 1fr; }
  .chamber { max-width: 360px; order: -1; margin-bottom: 20px; }
  .bento { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(5, 1fr); gap: 6px; }
  .step p { display: none; }
  .roster { grid-template-columns: repeat(2, 1fr); }
  .tension { grid-template-columns: 1fr; }
  .tension .col.left { border-radius: 14px 14px 0 0; }
  .tension .col.right { border-radius: 0 0 14px 14px; }
  .tension .vs { padding: 14px 0; }
  .bench-row { grid-template-columns: 1fr; gap: 8px; }
  .bench-cost { text-align: left; }
  .hh-grid { grid-template-columns: 1fr; gap: 6px; }
  .hh-colhead .hh-num, .hh-num { text-align: left; }
  .hh-colhead { display: none; }
  .hh-bar-row { grid-template-columns: 1fr; gap: 6px; }
  .hh-delta-n { font-size: 32px; }
  .nav-links { display: none; }
}
@media (max-width: 560px) {
  .bento { grid-template-columns: 1fr; }
  .roster { grid-template-columns: 1fr; }
  .hero-stats { gap: 26px; }
}

/* ---------- reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  html { scroll-behavior: auto; }
  [data-reveal] { opacity: 1; transform: none; }
}