:root {
  color-scheme: dark;
  --ink: #f7f3ea;
  --muted: #b7b2a7;
  --dim: #858178;
  --night: #08090d;
  --panel: #101116;
  --panel-2: #15161c;
  --line: rgba(255, 255, 255, 0.12);
  --amber: #ffbd4a;
  --amber-soft: rgba(255, 189, 74, 0.12);
  --cyan: #78e7dc;
  --danger: #ff8d7e;
  --max: 1180px;
  --reading: 760px;
  --radius: 22px;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  background: var(--night);
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 82% 4%, rgba(255, 189, 74, 0.13), transparent 32rem),
    radial-gradient(circle at 8% 38%, rgba(120, 231, 220, 0.07), transparent 28rem),
    var(--night);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
}

a { color: inherit; }

a:focus-visible,
button:focus-visible {
  outline: 3px solid var(--cyan);
  outline-offset: 4px;
}

.skip {
  position: fixed;
  left: 1rem;
  top: -5rem;
  z-index: 99;
  padding: 0.7rem 1rem;
  border-radius: 999px;
  color: #090a0d;
  background: var(--amber);
  font-weight: 800;
}

.skip:focus { top: 1rem; }

.shell {
  width: min(calc(100% - 2rem), var(--max));
  margin-inline: auto;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid var(--line);
  background: rgba(8, 9, 13, 0.86);
  backdrop-filter: blur(18px);
}

.topbar-inner {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
}

.brand img {
  display: block;
  width: 190px;
  height: auto;
}

.nav {
  display: flex;
  align-items: center;
  gap: 0.55rem;
}

.nav a {
  padding: 0.55rem 0.8rem;
  border-radius: 999px;
  color: var(--muted);
  font-size: 0.88rem;
  font-weight: 700;
  text-decoration: none;
}

.nav a:hover { color: var(--ink); background: rgba(255, 255, 255, 0.06); }
.nav .demo { color: #0a0b0e; background: var(--amber); }
.nav .demo:hover { color: #0a0b0e; background: #ffd27d; }

.hero {
  padding: clamp(4.5rem, 9vw, 8rem) 0 3.4rem;
}

.eyebrow,
.section-kicker,
.signal-label {
  margin: 0 0 1rem;
  color: var(--amber);
  font-size: 0.76rem;
  font-weight: 850;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.42fr) minmax(280px, 0.58fr);
  align-items: end;
  gap: clamp(2rem, 6vw, 5rem);
}

h1, h2, h3 {
  margin: 0;
  line-height: 1.05;
  letter-spacing: -0.035em;
}

h1 {
  max-width: 880px;
  font-size: clamp(2.65rem, 7vw, 6.4rem);
}

h1 em {
  color: var(--amber);
  font-style: normal;
}

.lede {
  max-width: 820px;
  margin: 1.6rem 0 0;
  color: var(--muted);
  font-size: clamp(1.05rem, 2vw, 1.3rem);
}

.meta {
  padding: 1.25rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(150deg, rgba(255, 189, 74, 0.1), rgba(255, 255, 255, 0.025));
}

.meta p { margin: 0.32rem 0; color: var(--muted); font-size: 0.9rem; }
.meta strong { color: var(--ink); }

.direct-answer {
  margin-top: 3rem;
  padding: clamp(1.4rem, 3vw, 2.3rem);
  border: 1px solid rgba(255, 189, 74, 0.3);
  border-radius: var(--radius);
  background: linear-gradient(130deg, rgba(255, 189, 74, 0.11), rgba(255, 255, 255, 0.02));
  box-shadow: 0 30px 70px rgba(0, 0, 0, 0.25);
}

.direct-answer p:last-child {
  max-width: 970px;
  margin: 0;
  font-size: clamp(1.12rem, 2.2vw, 1.5rem);
  line-height: 1.5;
}

.context-bar {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  margin-top: 1rem;
  border: 1px solid var(--line);
  border-radius: 18px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.025);
}

.context-item { padding: 1rem; border-right: 1px solid var(--line); }
.context-item:last-child { border-right: 0; }
.context-item span { display: block; color: var(--dim); font-size: 0.72rem; font-weight: 800; letter-spacing: 0.08em; text-transform: uppercase; }
.context-item b { display: block; margin-top: 0.3rem; font-size: 0.9rem; line-height: 1.35; }

.section {
  padding: clamp(4rem, 8vw, 7rem) 0;
  border-top: 1px solid var(--line);
}

.section-head {
  display: grid;
  grid-template-columns: 0.75fr 1.25fr;
  gap: 2rem;
  margin-bottom: clamp(2rem, 5vw, 4rem);
}

.section h2 { font-size: clamp(2rem, 4.6vw, 4.2rem); }
.section-intro { max-width: 650px; margin: 0; color: var(--muted); font-size: 1.08rem; }

.cards {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.card {
  min-height: 230px;
  padding: clamp(1.35rem, 3vw, 2rem);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(145deg, var(--panel-2), var(--panel));
}

.card-num {
  display: inline-grid;
  width: 2.2rem;
  height: 2.2rem;
  place-items: center;
  margin-bottom: 2rem;
  border-radius: 50%;
  color: #08090d;
  background: var(--amber);
  font-size: 0.75rem;
  font-weight: 900;
}

.card h3 { font-size: 1.45rem; }
.card p { margin: 0.8rem 0 0; color: var(--muted); }

.loop {
  position: relative;
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 0.75rem;
}

.loop::before {
  content: "";
  position: absolute;
  left: 7%;
  right: 7%;
  top: 1.65rem;
  height: 1px;
  background: linear-gradient(90deg, var(--amber), var(--cyan));
}

.loop-step { position: relative; z-index: 1; }
.loop-step b {
  display: grid;
  width: 3.3rem;
  height: 3.3rem;
  place-items: center;
  border: 1px solid rgba(255, 189, 74, 0.55);
  border-radius: 50%;
  color: var(--amber);
  background: var(--night);
  font-size: 0.8rem;
}
.loop-step h3 { margin-top: 1.2rem; font-size: 1.05rem; letter-spacing: -0.015em; }
.loop-step p { margin: 0.55rem 0 0; color: var(--muted); font-size: 0.9rem; line-height: 1.5; }

.control-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.control-panel {
  padding: clamp(1.4rem, 4vw, 2.4rem);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.025);
}

.control-panel.human { border-color: rgba(255, 141, 126, 0.32); }
.control-panel h3 { font-size: 1.45rem; }
.control-panel ul { margin: 1.25rem 0 0; padding: 0; list-style: none; }
.control-panel li { position: relative; padding: 0.7rem 0 0.7rem 1.6rem; border-bottom: 1px solid var(--line); color: var(--muted); }
.control-panel li:last-child { border-bottom: 0; }
.control-panel li::before { content: "✓"; position: absolute; left: 0; color: var(--cyan); font-weight: 900; }
.control-panel.human li::before { content: "→"; color: var(--danger); }

.truth-box {
  display: grid;
  grid-template-columns: 0.65fr 1.35fr;
  gap: 2rem;
  padding: clamp(1.5rem, 4vw, 3rem);
  border: 1px solid rgba(120, 231, 220, 0.27);
  border-radius: var(--radius);
  background: linear-gradient(135deg, rgba(120, 231, 220, 0.08), rgba(255, 255, 255, 0.02));
}

.truth-box h3 { font-size: clamp(1.6rem, 3vw, 2.5rem); }
.truth-copy p { margin: 0 0 1rem; color: var(--muted); }
.truth-copy p:last-child { margin-bottom: 0; }
.truth-copy strong { color: var(--ink); }

.scenario {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.scenario-card {
  padding: clamp(1.4rem, 4vw, 2.5rem);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
}

.scenario-card h3 { font-size: 1.4rem; }
.scenario-card ol { margin: 1.2rem 0 0; padding-left: 1.25rem; color: var(--muted); }
.scenario-card li { margin: 0.65rem 0; }
.scenario-card.limit { background: linear-gradient(145deg, rgba(255, 141, 126, 0.08), var(--panel)); }

.reading { max-width: var(--reading); margin-inline: auto; }
.reading h2 { font-size: clamp(2rem, 4vw, 3.3rem); }
.reading h3 { margin-top: 2.2rem; font-size: 1.35rem; }
.reading p, .reading li { color: var(--muted); }
.reading strong { color: var(--ink); }
.reading a { color: var(--amber); text-underline-offset: 0.2em; }

.source-list { padding-left: 1.2rem; }
.source-list li { margin: 0.7rem 0; }

.cta-band {
  margin: 0 auto clamp(4rem, 8vw, 7rem);
  padding: clamp(2rem, 6vw, 4.5rem);
  border: 1px solid rgba(255, 189, 74, 0.35);
  border-radius: 30px;
  background:
    linear-gradient(120deg, rgba(255, 189, 74, 0.16), rgba(255, 255, 255, 0.02)),
    var(--panel);
}

.cta-band h2 { max-width: 780px; font-size: clamp(2.1rem, 5vw, 4.5rem); }
.cta-band p { max-width: 690px; margin: 1rem 0 1.6rem; color: var(--muted); }
.button {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.85rem 1.15rem;
  border-radius: 999px;
  color: #090a0d;
  background: var(--amber);
  font-weight: 850;
  text-decoration: none;
}
.button:hover { background: #ffd27d; transform: translateY(-1px); }

.footer {
  border-top: 1px solid var(--line);
  padding: 2rem 0 3rem;
  color: var(--dim);
  font-size: 0.85rem;
}

.footer-inner { display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; }
.footer a { color: var(--muted); }

@media (max-width: 920px) {
  .hero-grid,
  .section-head,
  .truth-box { grid-template-columns: 1fr; }
  .context-bar { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .context-item { border-bottom: 1px solid var(--line); }
  .loop { grid-template-columns: repeat(3, minmax(0, 1fr)); row-gap: 2.2rem; }
  .loop::before { display: none; }
}

@media (max-width: 640px) {
  .shell { width: min(calc(100% - 1.25rem), var(--max)); }
  .topbar-inner { min-height: 68px; }
  .brand img { width: 152px; }
  .nav a:not(.locale):not(.demo) { display: none; }
  .nav a { padding: 0.5rem 0.66rem; font-size: 0.78rem; }
  .hero { padding-top: 3.5rem; }
  h1 { font-size: clamp(2.45rem, 13vw, 4rem); }
  .cards,
  .control-grid,
  .scenario { grid-template-columns: 1fr; }
  .context-bar { grid-template-columns: 1fr; }
  .context-item { border-right: 0; }
  .loop { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .card { min-height: 0; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition: none !important; animation: none !important; }
}