:root {
  color-scheme: dark;
  --bg: #070b14;
  --panel: #0d1628;
  --panel-raised: #111e34;
  --panel-soft: #0a1323;
  --ink: #f2f7ff;
  --muted: #9aabc2;
  --subtle: #6c7d96;
  --line: #203452;
  --line-strong: #315278;
  --accent: #4d8dff;
  --accent-bright: #79adff;
  --accent-dark: #2459c5;
  --cyan: #35d6d1;
  --cyan-soft: #9bf5ed;
  --success: #64e3ad;
  --shadow: 0 22px 70px rgba(0, 0, 0, 0.28);
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  background: radial-gradient(circle at 78% 5%, rgba(41, 97, 190, 0.16), transparent 32rem), var(--bg);
  line-height: 1.65;
}

body::before {
  position: fixed;
  z-index: -1;
  inset: 0;
  pointer-events: none;
  content: "";
  opacity: 0.22;
  background-image: linear-gradient(rgba(85, 139, 210, 0.06) 1px, transparent 1px), linear-gradient(90deg, rgba(85, 139, 210, 0.06) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(to bottom, black, transparent 70%);
}

a { color: inherit; }
.site-header, .site-footer, main { width: min(1180px, calc(100% - 48px)); margin: 0 auto; }

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}

.brand { display: inline-flex; align-items: center; gap: 12px; font-weight: 750; letter-spacing: -0.02em; text-decoration: none; }
.brand-mark {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  color: #fff;
  background: linear-gradient(135deg, var(--accent-bright), var(--accent-dark));
  border: 1px solid rgba(155, 206, 255, 0.35);
  border-radius: var(--radius-sm);
  box-shadow: 0 0 24px rgba(77, 141, 255, 0.3);
}

nav ul { display: flex; flex-wrap: wrap; gap: 6px; margin: 0; padding: 0; list-style: none; color: var(--muted); font-size: 0.9rem; }
nav a { display: block; padding: 7px 11px; border: 1px solid transparent; border-radius: 999px; text-decoration: none; }
nav a:hover, nav a:focus-visible { color: var(--ink); border-color: var(--line-strong); background: rgba(77, 141, 255, 0.1); outline: none; }

section { scroll-margin-top: 24px; }
.hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(360px, 0.95fr);
  align-items: center;
  gap: 72px;
  height: 900px;
  min-height: 900px;
  padding: 64px 0;
}

.hero > .eyebrow,
.hero > h1,
.hero > .hero-intro,
.hero > .safety-notice,
.hero > .button {
  grid-column: 1;
  max-width: 650px;
}

.hero > .hero-panel {
  grid-column: 2;
  grid-row: 1 / span 5;
  align-self: center;
  min-height: 360px;
  padding: 28px;
  background: linear-gradient(160deg, rgba(18, 43, 76, 0.9), rgba(8, 17, 31, 0.96));
  border: 1px solid rgba(77, 141, 255, 0.45);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow), inset 0 1px 0 rgba(255, 255, 255, 0.06);
}

.hero-panel-header {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--line);
  font: 600 0.82rem/1.5 ui-monospace, SFMono-Regular, Menlo, monospace;
  letter-spacing: 0.04em;
}

.hero-panel-label { color: var(--cyan-soft); }
.hero-panel-status { color: var(--success); }
.hero-panel-flow { display: grid; gap: 26px; margin: 26px 0 0; }
.hero-panel-flow div { display: grid; gap: 4px; }
.hero-panel-flow dt { color: var(--accent-bright); font: 700 0.76rem/1.4 ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: 0.12em; }
.hero-panel-flow dd { margin: 0; color: var(--cyan-soft); font: 600 0.92rem/1.6 ui-monospace, SFMono-Regular, Menlo, monospace; }

.eyebrow { margin: 0 0 12px; color: var(--cyan); font-size: 0.76rem; font-weight: 750; letter-spacing: 0.14em; }
h1, h2, h3 { margin-top: 0; line-height: 1.2; }
h1 { max-width: 720px; margin-bottom: 20px; font-size: clamp(2.8rem, 8vw, 5.8rem); letter-spacing: -0.065em; }
h2 { margin-bottom: 18px; font-size: clamp(2rem, 4vw, 3.2rem); letter-spacing: -0.045em; }
h3 { margin-bottom: 10px; font-size: 1.1rem; }
p { margin: 0 0 18px; }
.hero-intro { max-width: 650px; color: var(--muted); font-size: 1.18rem; }

.safety-notice {
  display: inline-block;
  margin: 8px 0 24px;
  padding: 11px 15px;
  color: var(--cyan-soft);
  background: rgba(53, 214, 209, 0.08);
  border: 1px solid rgba(53, 214, 209, 0.28);
  border-radius: var(--radius-sm);
}

.button, .demo-controls button {
  display: inline-block;
  min-height: 46px;
  padding: 11px 17px;
  color: var(--ink);
  background: var(--panel-raised);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  font: inherit;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
  transition: border-color 160ms ease, background 160ms ease, box-shadow 160ms ease, transform 160ms ease;
}

.button-primary, .demo-controls button[aria-pressed="true"] { color: #fff; background: linear-gradient(135deg, var(--accent), var(--accent-dark)); border-color: var(--accent-bright); }
.button-secondary { color: var(--cyan-soft); }
.button:hover, .demo-controls button:hover { border-color: var(--accent-bright); background: #172945; box-shadow: 0 0 0 3px rgba(77, 141, 255, 0.18), 0 8px 24px rgba(0, 0, 0, 0.2); }
.button-primary:hover, .demo-controls button[aria-pressed="true"]:hover { background: var(--accent-dark); }
.button:focus-visible, .demo-controls button:focus-visible { outline: 3px solid rgba(53, 214, 209, 0.72); outline-offset: 3px; }
.button:active, .demo-controls button:active { transform: translateY(1px); }
.button:disabled, .demo-controls button:disabled, .button[aria-disabled="true"] { color: var(--subtle); background: var(--panel-soft); border-color: var(--line); cursor: not-allowed; box-shadow: none; opacity: 0.58; }
.demo-controls button[aria-pressed="true"] { box-shadow: inset 0 0 0 2px rgba(255, 255, 255, 0.3), 0 0 0 3px rgba(77, 141, 255, 0.16); }

.content-section { padding: 88px 0; border-top: 1px solid var(--line); }
.scenario-grid, .case-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 34px; }
.scenario-card, .case-list article, .demo-output { padding: 24px; background: linear-gradient(150deg, rgba(17, 30, 52, 0.96), rgba(10, 19, 35, 0.96)); border: 1px solid var(--line); border-radius: var(--radius-md); box-shadow: 0 12px 40px rgba(0, 0, 0, 0.12); }
.scenario-card, .case-list article { border-top-color: rgba(53, 214, 209, 0.4); }
.scenario-card p, .case-list p, .demo-section > p, .contact-section > p { color: var(--muted); }

.demo-section { max-width: 900px; margin-right: auto; margin-left: auto; }
.demo-controls { display: flex; flex-wrap: wrap; gap: 10px; margin: 28px 0; }
.demo-status { display: flex; flex-wrap: wrap; gap: 24px; margin-bottom: 18px; padding: 14px 16px; color: var(--muted); background: var(--panel-soft); border: 1px dashed var(--line-strong); border-radius: var(--radius-sm); }
.demo-status p { margin: 0; }
.demo-status span { color: var(--cyan-soft); font-weight: 700; }
.progress-list, .workflow-list, .boundary-section ul { padding-left: 24px; }
.progress-list { margin: 0 0 28px; }
.progress-list li { margin-bottom: 8px; color: var(--subtle); }
.progress-list li[data-complete="true"] { color: var(--success); font-weight: 700; }
.progress-list li[data-complete="true"]::marker { content: "✓  "; }
.demo-output { margin-bottom: 18px; border-color: rgba(77, 141, 255, 0.42); }
.demo-output h3 { margin-bottom: 6px; color: var(--cyan-soft); }

.workflow-list { max-width: 760px; margin: 34px 0 0; }
.workflow-list li, .boundary-section li { margin-bottom: 12px; color: var(--muted); }
.workflow-list strong { color: var(--ink); }
.boundary-section { padding-right: clamp(24px, 7vw, 96px); padding-left: clamp(24px, 7vw, 96px); background: rgba(255, 151, 151, 0.035); border: 1px solid rgba(255, 155, 155, 0.18); border-radius: var(--radius-lg); }
.boundary-section .safety-notice { color: #ffc3c3; background: rgba(255, 155, 155, 0.07); border-color: rgba(255, 155, 155, 0.28); }
.contact-section { padding-top: 104px; padding-bottom: 112px; text-align: center; }
.contact-section > p { max-width: 680px; margin-right: auto; margin-left: auto; }

.site-footer { display: flex; justify-content: space-between; gap: 20px; padding: 24px 0 40px; color: var(--subtle); border-top: 1px solid var(--line); font-size: 0.9rem; }
.site-footer p { margin: 0; }

@media (max-width: 760px) {
  .site-header, .site-footer { align-items: flex-start; flex-direction: column; }
  nav ul { gap: 2px; }
  .hero { grid-template-columns: 1fr; height: auto; min-height: auto; gap: 48px; padding: 72px 0; }
  .hero > .eyebrow,
  .hero > h1,
  .hero > .hero-intro,
  .hero > .safety-notice,
  .hero > .button,
  .hero > .hero-panel { grid-column: 1; }
  .hero > .hero-panel { grid-row: auto; min-height: 300px; }
  .hero, .content-section { padding-top: 64px; padding-bottom: 64px; }
  .scenario-grid, .case-list { grid-template-columns: 1fr; }
  .demo-controls { display: grid; grid-template-columns: 1fr; }
  .demo-controls button, .button { width: 100%; text-align: center; }
  .demo-status { display: grid; gap: 4px; }
  .boundary-section { padding-right: 20px; padding-left: 20px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; scroll-behavior: auto !important; }
  .button:active, .demo-controls button:active { transform: none; }
}