:root {
  --bg: #f3efe7;
  --panel: rgba(255, 252, 247, 0.82);
  --ink: #1b1e18;
  --muted: #5e6658;
  --accent: #0f9d58;
  --accent-deep: #0c6f3f;
  --line: rgba(27, 30, 24, 0.1);
  --shadow: 0 24px 70px rgba(32, 42, 25, 0.14);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Space Grotesk", system-ui, sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(15, 157, 88, 0.18), transparent 26%),
    radial-gradient(circle at top right, rgba(237, 179, 74, 0.2), transparent 22%),
    linear-gradient(180deg, #f8f4ed 0%, var(--bg) 100%);
}

.page-shell {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 32px 0 48px;
}

.hero {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 24px;
  align-items: stretch;
}

.hero-copy,
.hero-panel,
.viewer-card,
.info-card {
  background: var(--panel);
  backdrop-filter: blur(16px);
  border: 1px solid var(--line);
  border-radius: 28px;
  box-shadow: var(--shadow);
}

.hero-copy {
  padding: 32px;
}

.eyebrow {
  margin: 0 0 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-deep);
  font-size: 0.78rem;
  font-weight: 700;
}

h1,
h2,
h3 {
  margin: 0;
}

h1 {
  font-family: "Instrument Serif", serif;
  font-size: clamp(2.7rem, 5vw, 4.8rem);
  line-height: 0.94;
  letter-spacing: -0.03em;
  max-width: 12ch;
}

.lead,
.status,
.signal-meta,
.info-card li {
  color: var(--muted);
}

.lead {
  margin: 18px 0 24px;
  max-width: 62ch;
  font-size: 1rem;
  line-height: 1.6;
}

.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

button {
  border: 0;
  border-radius: 999px;
  padding: 13px 20px;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  transition: transform 120ms ease, opacity 120ms ease, background 120ms ease;
}

button:hover {
  transform: translateY(-1px);
}

button:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none;
}

.primary {
  background: linear-gradient(135deg, var(--accent) 0%, #57bf69 100%);
  color: white;
}

.secondary {
  background: #ebe4d8;
  color: var(--ink);
}

.status {
  margin: 18px 0 0;
  font-size: 0.94rem;
}

.hero-panel {
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 20px;
}

.signal-card {
  background: linear-gradient(145deg, #17311d 0%, #244f30 100%);
  color: white;
  border-radius: 24px;
  padding: 24px;
  min-height: 180px;
}

.signal-label {
  display: block;
  font-size: 0.82rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  opacity: 0.72;
  margin-bottom: 12px;
}

#gestureName {
  display: block;
  font-size: clamp(2rem, 3vw, 3rem);
  line-height: 1;
}

.signal-meta {
  display: block;
  margin-top: 12px;
  color: rgba(255, 255, 255, 0.72);
}

.gesture-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.gesture-chip {
  padding: 10px 14px;
  border-radius: 999px;
  background: rgba(15, 157, 88, 0.1);
  color: var(--accent-deep);
  border: 1px solid rgba(15, 157, 88, 0.15);
  font-size: 0.92rem;
  font-weight: 700;
}

.demo-layout {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 24px;
  margin-top: 24px;
}

.viewer-card {
  padding: 22px;
}

.viewer-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 18px;
}

.toggle {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 0.94rem;
  color: var(--muted);
}

.viewer-stage {
  position: relative;
  overflow: hidden;
  border-radius: 22px;
  background: #1d221c;
  aspect-ratio: 4 / 3;
  min-height: 320px;
}

video,
canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.permission-overlay {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 24px;
  text-align: center;
  color: white;
  background: linear-gradient(180deg, rgba(18, 24, 17, 0.2), rgba(18, 24, 17, 0.7));
}

.permission-overlay.hidden {
  display: none;
}

.sidebar {
  display: grid;
  gap: 24px;
}

.info-card {
  padding: 24px;
}

.info-card h3 {
  margin-bottom: 14px;
  font-size: 1.1rem;
}

.info-card ul {
  margin: 0;
  padding-left: 18px;
  line-height: 1.65;
}

@media (max-width: 920px) {
  .hero,
  .demo-layout {
    grid-template-columns: 1fr;
  }

  .page-shell {
    width: min(100% - 20px, 1180px);
    padding-top: 20px;
  }

  .hero-copy,
  .hero-panel,
  .viewer-card,
  .info-card {
    border-radius: 22px;
  }

  h1 {
    max-width: none;
  }
}