@layer reset, base, components, utilities;

@layer reset {
  *, *::before, *::after { box-sizing: border-box; }
  html { scroll-behavior: smooth; }
  body, h1, h2, h3, p, blockquote, ul { margin: 0; }
  ul { padding: 0; list-style: none; }
  img, svg { display: block; max-width: 100%; }
  a { color: inherit; text-decoration: none; }
  button, input { font: inherit; }
}

@layer base {
  :root {
    --ink: #eafff7;
    --muted: #91aaa1;
    --dim: #5e756d;
    --mint: #72f5c1;
    --mint-soft: #a4ffdd;
    --cyan: #65d8ff;
    --bg: #06100e;
    --surface: #0a1714;
    --surface-2: #0d1d19;
    --line: rgba(151, 255, 216, .12);
    --line-bright: rgba(151, 255, 216, .28);
    --shadow: 0 28px 90px rgba(0, 0, 0, .38);
    --radius: 22px;
    --shell: min(1180px, calc(100% - 40px));
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    color: var(--ink);
    background: var(--bg);
  }

  body {
    min-width: 320px;
    min-height: 100vh;
    overflow-x: hidden;
    background:
      linear-gradient(rgba(103, 238, 192, .025) 1px, transparent 1px),
      linear-gradient(90deg, rgba(103, 238, 192, .025) 1px, transparent 1px),
      radial-gradient(circle at 75% 7%, rgba(49, 216, 167, .11), transparent 31rem),
      var(--bg);
    background-size: 64px 64px, 64px 64px, auto, auto;
    color: var(--ink);
    line-height: 1.6;
    text-rendering: optimizeLegibility;
  }

  ::selection { color: #03110c; background: var(--mint); }
  :focus-visible { outline: 2px solid var(--mint); outline-offset: 5px; }
  .shell { width: var(--shell); margin-inline: auto; }
  .mono { font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace; letter-spacing: .08em; }
}

@layer components {
  .ambient { position: fixed; z-index: -1; border-radius: 50%; pointer-events: none; filter: blur(100px); opacity: .18; }
  .ambient-one { width: 340px; height: 340px; top: 20%; right: -180px; background: var(--cyan); }
  .ambient-two { width: 290px; height: 290px; bottom: 6%; left: -160px; background: var(--mint); }

  .site-header {
    display: flex; align-items: center; justify-content: space-between; padding-block: 28px;
    border-bottom: 1px solid var(--line);
  }
  .brand { display: inline-flex; align-items: center; gap: 11px; font-size: 1.03rem; font-weight: 730; letter-spacing: -.02em; }
  .brand-mark { width: 34px; color: var(--mint); fill: var(--mint); }
  .header-meta { display: flex; align-items: center; gap: 9px; color: var(--muted); font-size: .79rem; text-transform: uppercase; letter-spacing: .12em; }
  .status-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--mint); box-shadow: 0 0 0 5px rgba(114, 245, 193, .08), 0 0 20px var(--mint); animation: pulse 2.4s ease-in-out infinite; }

  .hero { display: grid; grid-template-columns: minmax(0, .93fr) minmax(440px, .77fr); gap: clamp(54px, 7vw, 105px); align-items: center; min-height: 760px; padding-block: 84px 110px; }
  .hero > * { min-width: 0; }
  .eyebrow { margin-bottom: 20px; color: var(--mint); font-size: .72rem; font-weight: 760; letter-spacing: .18em; text-transform: uppercase; }
  .hero h1 { max-width: 760px; font-size: clamp(3.5rem, 6.4vw, 6.2rem); line-height: .96; letter-spacing: -.068em; font-weight: 660; text-wrap: balance; }
  .hero h1 span { color: transparent; background: linear-gradient(96deg, var(--mint-soft), var(--cyan)); background-clip: text; -webkit-background-clip: text; }
  .hero-lede { max-width: 650px; margin-top: 30px; color: var(--muted); font-size: clamp(1.05rem, 1.35vw, 1.24rem); line-height: 1.72; }
  .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 37px; }
  .button { display: inline-flex; align-items: center; justify-content: center; gap: 18px; min-height: 50px; padding: 0 21px; border: 1px solid var(--line-bright); border-radius: 999px; font-size: .9rem; font-weight: 700; transition: transform .2s ease, border-color .2s ease, background .2s ease; }
  .button:hover { transform: translateY(-2px); border-color: rgba(151, 255, 216, .55); }
  .button-primary { color: #04120d; background: var(--mint); border-color: var(--mint); box-shadow: 0 12px 42px rgba(70, 227, 174, .16); }
  .button-primary:hover { background: var(--mint-soft); }
  .button-quiet { color: var(--ink); background: rgba(255,255,255,.018); }
  .signal-list { display: flex; flex-wrap: wrap; gap: 10px 22px; margin-top: 34px; color: var(--dim); font-size: .77rem; letter-spacing: .04em; }
  .signal-list li { display: flex; align-items: center; gap: 8px; }
  .signal-list li::before { content: ""; width: 4px; height: 4px; border-radius: 50%; background: var(--mint); box-shadow: 0 0 8px var(--mint); }

  .system-card {
    position: relative; min-height: 590px; overflow: hidden; border: 1px solid var(--line-bright); border-radius: 28px;
    background: linear-gradient(145deg, rgba(18, 42, 35, .78), rgba(6, 17, 14, .86)); box-shadow: var(--shadow);
    isolation: isolate;
  }
  .system-card::before { content: ""; position: absolute; inset: 0; z-index: -1; background: radial-gradient(circle at 50% 42%, rgba(108, 245, 198, .12), transparent 28%); }
  .system-card::after { content: ""; position: absolute; inset: 0; z-index: -2; opacity: .38; background-image: linear-gradient(var(--line) 1px, transparent 1px), linear-gradient(90deg, var(--line) 1px, transparent 1px); background-size: 32px 32px; mask-image: linear-gradient(to bottom, black, transparent 92%); }
  .card-topline { display: flex; justify-content: space-between; padding: 19px 22px; color: var(--muted); border-bottom: 1px solid var(--line); font-size: .7rem; text-transform: uppercase; letter-spacing: .15em; }
  .topology { position: relative; height: 466px; }
  .topology svg { width: 100%; height: 100%; }
  .node > circle:first-child { fill: rgba(6, 20, 16, .85); stroke: rgba(115, 245, 193, .3); stroke-width: 1.4; stroke-dasharray: 3 5; transform-box: fill-box; transform-origin: center; animation: orbit 15s linear infinite; }
  .node-core { fill: var(--mint); filter: drop-shadow(0 0 7px var(--mint)); }
  .root-node > circle:nth-child(2) { fill: rgba(7, 30, 23, .9); stroke: var(--mint); stroke-width: 1.6; }
  .edges path { stroke-dasharray: 5 9; animation: dash 22s linear infinite; }
  .node-label { position: absolute; padding: 5px 8px; color: #a7c3b9; border: 1px solid var(--line); border-radius: 6px; background: rgba(5, 15, 12, .78); font-family: "SFMono-Regular", Consolas, monospace; font-size: .58rem; letter-spacing: .07em; }
  .label-core { left: 43%; top: 51%; color: var(--mint); }
  .label-cloud { left: 13%; top: 20%; }
  .label-identity { right: 5%; top: 19%; }
  .label-data { right: 4%; top: 62%; }
  .card-readout { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); }
  .card-readout div { display: flex; flex-direction: column; gap: 3px; padding: 17px 19px; }
  .card-readout div + div { border-left: 1px solid var(--line); }
  .readout-label { color: var(--dim); font-size: .62rem; text-transform: uppercase; letter-spacing: .15em; }
  .card-readout strong { color: #cceee1; font-size: .76rem; font-weight: 600; }

  .section { padding-block: 120px; border-top: 1px solid var(--line); }
  .section-intro { display: grid; grid-template-columns: .48fr 1.05fr; gap: 24px 68px; align-items: start; }
  .section-intro .eyebrow { grid-row: 1 / span 2; }
  .section h2 { max-width: 760px; font-size: clamp(2.35rem, 4vw, 4rem); line-height: 1.06; letter-spacing: -.052em; font-weight: 620; text-wrap: balance; }
  .section-intro > p:last-child { max-width: 720px; color: var(--muted); font-size: 1.05rem; }
  .feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 62px; }
  .feature-card { position: relative; min-height: 310px; padding: 28px; border: 1px solid var(--line); border-radius: var(--radius); background: linear-gradient(145deg, rgba(16, 35, 30, .75), rgba(8, 20, 17, .68)); transition: transform .25s ease, border-color .25s ease; }
  .feature-card:hover { transform: translateY(-5px); border-color: var(--line-bright); }
  .feature-index { position: absolute; top: 26px; right: 26px; color: var(--dim); font-size: .66rem; }
  .feature-icon { display: grid; place-items: center; width: 46px; height: 46px; margin-bottom: 54px; color: var(--mint); border: 1px solid var(--line-bright); border-radius: 14px; background: rgba(114, 245, 193, .05); font-size: 1.25rem; }
  .feature-card h3 { font-size: 1.26rem; letter-spacing: -.025em; }
  .feature-card p { margin-top: 13px; color: var(--muted); font-size: .93rem; }

  .model-section { display: grid; grid-template-columns: .55fr 1fr; gap: 80px; align-items: start; }
  .model-heading { position: sticky; top: 42px; }
  .flow { display: flex; flex-direction: column; }
  .flow-step { display: grid; grid-template-columns: 55px 1fr; gap: 22px; padding: 31px 0; border-top: 1px solid var(--line); }
  .flow-step:last-of-type { border-bottom: 1px solid var(--line); }
  .flow-number { color: var(--mint); font-size: .67rem; padding-top: 5px; }
  .flow-step h3 { font-size: 1.38rem; font-weight: 610; }
  .flow-step p { margin-top: 6px; color: var(--muted); }
  .flow-step + .flow-step { position: relative; }
  .flow-step + .flow-step::before { content: "→"; position: absolute; top: -14px; left: 14px; color: var(--dim); transform: rotate(90deg); }

  .principles { padding-bottom: 140px; }
  .principle-panel { padding: clamp(34px, 6vw, 78px); border: 1px solid var(--line-bright); border-radius: 30px; background: radial-gradient(circle at 85% 20%, rgba(101,216,255,.08), transparent 25rem), linear-gradient(145deg, rgba(17, 39, 33, .75), rgba(8, 21, 17, .85)); }
  blockquote { max-width: 940px; font-size: clamp(2rem, 4.2vw, 4.2rem); line-height: 1.12; letter-spacing: -.055em; font-weight: 570; text-wrap: balance; }
  .principle-note { max-width: 650px; margin-top: 36px; color: var(--muted); }

  .site-footer { display: grid; grid-template-columns: .65fr 1fr auto; gap: 30px; align-items: center; padding-block: 38px; color: var(--dim); border-top: 1px solid var(--line); font-size: .76rem; }
  .footer-brand { color: var(--ink); }
  .footer-brand .brand-mark { width: 27px; }

  .error-page { display: grid; min-height: 100vh; place-items: center; }
  .error-panel { width: min(680px, calc(100% - 32px)); padding: 52px; border: 1px solid var(--line-bright); border-radius: 24px; background: rgba(10, 23, 20, .82); box-shadow: var(--shadow); }
  .error-code { color: var(--mint); font-size: .74rem; font-weight: 700; letter-spacing: .16em; }
  .error-panel h1 { margin-top: .7rem; font-size: clamp(2.8rem, 8vw, 5rem); line-height: 1; letter-spacing: -.06em; }
  .error-panel p { margin-top: 18px; color: var(--muted); }
  .error-panel .button { margin-top: 20px; }

  .reveal { opacity: 1; transform: none; }
  .js .reveal { opacity: 0; transform: translateY(18px); transition: opacity .7s ease, transform .7s cubic-bezier(.2,.8,.2,1); }
  .js .reveal.is-visible { opacity: 1; transform: translateY(0); }
}

@layer utilities {
  @keyframes pulse { 0%,100% { opacity: .65; transform: scale(.9); } 50% { opacity: 1; transform: scale(1.08); } }
  @keyframes dash { to { stroke-dashoffset: -140; } }
  @keyframes orbit { to { rotate: 360deg; } }

  @media (max-width: 940px) {
    :root { --shell: min(100% - 32px, 760px); }
    .hero { grid-template-columns: 1fr; min-height: auto; padding-top: 72px; }
    .system-card { min-height: 560px; }
    .section-intro, .model-section { grid-template-columns: 1fr; }
    .section-intro .eyebrow { grid-row: auto; }
    .feature-grid { grid-template-columns: 1fr; }
    .feature-card { min-height: 240px; }
    .feature-icon { margin-bottom: 32px; }
    .model-heading { position: static; }
    .site-footer { grid-template-columns: 1fr; }
  }

  @media (max-width: 600px) {
    :root { --shell: calc(100% - 26px); }
    body { background-size: 42px 42px, 42px 42px, auto, auto; }
    .site-header { padding-block: 20px; }
    .header-meta { font-size: .63rem; }
    .hero { gap: 50px; padding-block: 58px 78px; }
    .hero h1 { font-size: clamp(2.5rem, 13.2vw, 4.35rem); }
    .hero-lede { font-size: 1rem; }
    .hero-actions { flex-direction: column; align-items: stretch; }
    .button { width: 100%; }
    .signal-list { display: grid; }
    .system-card { min-height: 490px; border-radius: 22px; }
    .topology { height: 380px; }
    .node-label { display: none; }
    .card-readout div { padding: 13px 10px; }
    .card-readout strong { font-size: .65rem; }
    .section { padding-block: 88px; }
    .feature-grid { margin-top: 42px; }
    .principles { padding-bottom: 92px; }
    .site-footer { padding-block: 30px; }
  }

  @media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
    .js .reveal { opacity: 1; transform: none; }
  }
}