:root {
  --bg: #0a0a0a;
  --bg-elevated: #111111;
  --bg-card: #161616;
  --fg: #e8e4df;
  --fg-muted: #8a847d;
  --fg-dim: #5a5650;
  --accent: #c4b5a0;
  --accent-dim: #8a7d6e;
  --border: #222220;
  --border-light: #2a2a28;
  --stone-basalt: #1a1a1a;
  --stone-slate: #3a3832;
  --stone-obsidian: #0d0d0d;
  --font-display: 'Syne', sans-serif;
  --font-body: 'DM Sans', sans-serif;
  --max-width: 1200px;
  --section-pad: clamp(80px, 12vw, 160px);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { font-size: 16px; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  font-weight: 300;
  line-height: 1.7;
  overflow-x: hidden;
}

/* ---- NAV ---- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 24px 40px;
  background: rgba(10,10,10,0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.nav-logo {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.1rem;
  letter-spacing: 0.35em;
  color: var(--fg);
}
.nav-tagline {
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--fg-muted);
}

/* ---- HERO ---- */
.hero {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  padding: 120px 40px 80px;
  max-width: var(--max-width);
  margin: 0 auto;
  gap: 60px;
}
.hero-label {
  font-family: var(--font-display);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 32px;
}
.hero-title {
  font-family: var(--font-display);
  font-size: clamp(3.5rem, 8vw, 7rem);
  font-weight: 800;
  line-height: 0.95;
  letter-spacing: -0.02em;
  color: var(--fg);
  margin-bottom: 40px;
}
.hero-lede {
  font-size: 1.15rem;
  line-height: 1.8;
  color: var(--fg-muted);
  max-width: 440px;
}
.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}
.stone-display {
  position: relative;
  width: 320px;
  height: 400px;
}
.stone {
  position: absolute;
  border-radius: 50%;
  transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}
.stone-1 {
  width: 200px;
  height: 200px;
  background: radial-gradient(ellipse at 30% 30%, #2a2a2a 0%, var(--stone-basalt) 60%, #0f0f0f 100%);
  top: 20px;
  left: 10px;
  box-shadow: 0 40px 80px rgba(0,0,0,0.6), inset 0 -20px 40px rgba(0,0,0,0.3), inset 0 2px 10px rgba(255,255,255,0.04);
}
.stone-2 {
  width: 140px;
  height: 140px;
  background: radial-gradient(ellipse at 35% 25%, #4a4840 0%, var(--stone-slate) 50%, #252420 100%);
  top: 180px;
  right: 20px;
  border-radius: 45% 55% 50% 50%;
  box-shadow: 0 30px 60px rgba(0,0,0,0.5), inset 0 -15px 30px rgba(0,0,0,0.3), inset 0 2px 8px rgba(255,255,255,0.05);
}
.stone-3 {
  width: 100px;
  height: 100px;
  background: radial-gradient(ellipse at 40% 20%, #1a1a1a 0%, var(--stone-obsidian) 40%, #000 100%);
  bottom: 20px;
  left: 60px;
  border-radius: 40% 60% 55% 45%;
  box-shadow: 0 25px 50px rgba(0,0,0,0.7), inset 0 1px 15px rgba(255,255,255,0.08);
}
.stone-display:hover .stone-1 { transform: translateY(-8px) rotate(-2deg); }
.stone-display:hover .stone-2 { transform: translateY(-5px) rotate(3deg); }
.stone-display:hover .stone-3 { transform: translateY(-12px) rotate(-4deg); }

/* ---- PHILOSOPHY ---- */
.philosophy {
  padding: var(--section-pad) 40px;
  border-top: 1px solid var(--border);
}
.philosophy-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 60px;
  align-items: start;
}
.philosophy-number {
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  color: var(--fg-dim);
  padding-top: 12px;
}
.philosophy-content h2 {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  font-weight: 700;
  line-height: 1.3;
  color: var(--fg);
  margin-bottom: 32px;
}
.philosophy-content p {
  font-size: 1.05rem;
  line-height: 1.9;
  color: var(--fg-muted);
  max-width: 680px;
}

/* ---- FEATURES ---- */
.features {
  padding: var(--section-pad) 40px;
  border-top: 1px solid var(--border);
}
.features-header {
  max-width: var(--max-width);
  margin: 0 auto 60px;
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 60px;
  align-items: start;
}
.features-number {
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  color: var(--fg-dim);
  padding-top: 8px;
}
.features-header h2 {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  font-weight: 700;
  line-height: 1.3;
  color: var(--fg);
}
.features-grid {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2px;
}
.feature-card {
  background: var(--bg-card);
  padding: 48px 36px;
  border: 1px solid var(--border);
}
.feature-icon {
  color: var(--accent);
  margin-bottom: 28px;
}
.feature-card h3 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--fg);
  margin-bottom: 16px;
  letter-spacing: 0.01em;
}
.feature-card p {
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--fg-muted);
}

/* ---- MATERIALS ---- */
.materials {
  padding: var(--section-pad) 40px;
  border-top: 1px solid var(--border);
}
.materials-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}
.materials-number {
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  color: var(--fg-dim);
  margin-bottom: 20px;
}
.materials-inner > h2 {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  font-weight: 700;
  line-height: 1.3;
  color: var(--fg);
  margin-bottom: 60px;
}
.materials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}
.material-item {
  display: flex;
  flex-direction: column;
  gap: 24px;
}
.material-swatch {
  width: 100%;
  aspect-ratio: 1;
  border-radius: 4px;
  border: 1px solid var(--border-light);
}
.swatch-basalt {
  background: radial-gradient(ellipse at 30% 30%, #2a2a28 0%, #141414 60%, #0a0a0a 100%);
}
.swatch-slate {
  background: radial-gradient(ellipse at 40% 25%, #4a4840 0%, #33312c 50%, #1f1e1b 100%);
}
.swatch-obsidian {
  background: radial-gradient(ellipse at 35% 20%, #222 0%, #0a0a0a 40%, #000 100%);
  position: relative;
  overflow: hidden;
}
.swatch-obsidian::after {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: linear-gradient(135deg, transparent 40%, rgba(255,255,255,0.03) 50%, transparent 60%);
}
.material-info h4 {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  color: var(--fg);
  margin-bottom: 8px;
}
.material-info p {
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--fg-muted);
}

/* ---- CLOSING ---- */
.closing {
  padding: var(--section-pad) 40px;
  border-top: 1px solid var(--border);
  text-align: center;
}
.closing-inner {
  max-width: 700px;
  margin: 0 auto;
}
.closing-mark {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 0.8rem;
  letter-spacing: 0.4em;
  color: var(--accent-dim);
  margin-bottom: 40px;
}
.closing h2 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4.5vw, 3.2rem);
  font-weight: 700;
  line-height: 1.2;
  color: var(--fg);
  margin-bottom: 24px;
}
.closing-sub {
  font-size: 1.1rem;
  line-height: 1.8;
  color: var(--fg-muted);
}

/* ---- FOOTER ---- */
.footer {
  padding: 40px;
  border-top: 1px solid var(--border);
}
.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.footer-brand {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 0.85rem;
  letter-spacing: 0.35em;
  color: var(--fg-dim);
}
.footer-meta {
  font-size: 0.8rem;
  color: var(--fg-dim);
  letter-spacing: 0.05em;
}

/* ---- RESPONSIVE ---- */
@media (max-width: 768px) {
  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
    padding: 120px 24px 60px;
    gap: 48px;
  }
  .hero-visual {
    order: -1;
  }
  .stone-display {
    width: 240px;
    height: 300px;
  }
  .stone-1 { width: 150px; height: 150px; }
  .stone-2 { width: 105px; height: 105px; }
  .stone-3 { width: 75px; height: 75px; }
  .nav { padding: 20px 24px; }
  .philosophy-inner,
  .features-header {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .features-grid {
    grid-template-columns: 1fr;
  }
  .materials-grid {
    grid-template-columns: 1fr;
  }
  .philosophy,
  .features,
  .materials,
  .closing {
    padding: 60px 24px;
  }
  .footer { padding: 32px 24px; }
  .footer-inner { flex-direction: column; gap: 8px; text-align: center; }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 3rem;
  }
  .feature-card {
    padding: 32px 24px;
  }
}