@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@500;600;700;800&family=Inter:wght@300;400;500;600;700&display=swap');

:root {
  --bg-deep-space: #090a0f;
  --card-ring: #131520;
  --pulse-violet: #7c3aed;
  --pulse-light: #a78bfa;
  --text-pure: #f8fafc;
  --text-muted: #848c9e;
  --border-pulse: rgba(124, 58, 237, 0.28);
  --font-heading: 'Plus Jakarta Sans', sans-serif;
  --font-body: 'Inter', sans-serif;
  --transition: all 0.3s ease;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body { background-color: var(--bg-deep-space); color: var(--text-pure); font-family: var(--font-body); line-height: 1.65; overflow-x: hidden; padding-bottom: 70px; }

.simple-switcher { position: fixed; bottom: 16px; left: 50%; transform: translateX(-50%); z-index: 9999; background: rgba(9, 10, 15, 0.96); backdrop-filter: blur(16px); border: 1px solid rgba(255, 255, 255, 0.15); border-radius: 9999px; padding: 6px 12px; display: flex; align-items: center; gap: 6px; box-shadow: 0 10px 30px rgba(0, 0, 0, 0.6); max-width: 94vw; overflow-x: auto; scrollbar-width: none; -webkit-overflow-scrolling: touch; }
.simple-switcher::-webkit-scrollbar { display: none; }
.simple-switcher span { font-size: 0.7rem; color: #999; text-transform: uppercase; letter-spacing: 0.08em; padding: 0 4px; font-weight: 700; white-space: nowrap; }
.simple-switcher a { font-size: 0.75rem; color: #bbb; text-decoration: none; padding: 5px 10px; border-radius: 9999px; transition: var(--transition); white-space: nowrap; }
.simple-switcher a:hover { color: #fff; background: rgba(255, 255, 255, 0.1); }
.simple-switcher a.active { background: var(--pulse-violet); color: #fff; font-weight: 700; }

.ring-nav { display: flex; justify-content: space-between; align-items: center; padding: 20px 6vw; border-bottom: 1px solid var(--border-pulse); position: sticky; top: 0; background: rgba(9, 10, 15, 0.94); backdrop-filter: blur(12px); z-index: 100; }
.ring-logo { font-family: var(--font-heading); font-size: clamp(1.15rem, 3vw, 1.45rem); letter-spacing: 0.08em; color: #fff; text-decoration: none; font-weight: 800; }
.ring-menu { display: flex; gap: 30px; list-style: none; font-size: 0.82rem; text-transform: uppercase; letter-spacing: 0.08em; }
.ring-menu a { color: var(--text-muted); text-decoration: none; transition: var(--transition); }
.ring-menu a:hover { color: var(--pulse-light); }

.btn-violet { background: var(--pulse-violet); color: #fff; font-size: 0.82rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em; padding: 12px 24px; border-radius: 9999px; text-decoration: none; border: none; cursor: pointer; transition: var(--transition); text-align: center; display: inline-block; }
.btn-violet:hover { background: var(--pulse-light); transform: translateY(-2px); box-shadow: 0 6px 20px rgba(124, 58, 237, 0.4); }
.btn-telemetry-link { color: #fff; font-size: 0.84rem; text-decoration: none; padding: 12px 20px; border: 1px solid var(--border-pulse); border-radius: 9999px; }

.ring-hero { max-width: 1360px; margin: 0 auto; padding: 60px 6vw 80px; display: grid; grid-template-columns: 1.1fr 1fr; gap: 50px; align-items: center; }
.titanium-badge { font-size: 0.76rem; letter-spacing: 0.18em; text-transform: uppercase; color: var(--pulse-light); font-weight: 700; display: block; margin-bottom: 16px; }
.ring-hero-left h1 { font-family: var(--font-heading); font-size: clamp(2.3rem, 5vw, 3.8rem); line-height: 1.14; margin-bottom: 22px; font-weight: 700; }
.ring-hero-left h1 em { font-style: italic; color: var(--pulse-light); }
.ring-hero-left p { color: var(--text-muted); font-size: 1.05rem; margin-bottom: 32px; max-width: 520px; }
.ring-hero-ctas { display: flex; gap: 16px; align-items: center; }
.ring-frame { border-radius: 12px; overflow: hidden; border: 1px solid var(--border-pulse); box-shadow: 0 20px 50px rgba(0, 0, 0, 0.7); }
.ring-frame img { width: 100%; height: auto; display: block; }

.biometric-matrix-section { border-top: 1px solid var(--border-pulse); border-bottom: 1px solid var(--border-pulse); background: #0e1018; padding: 80px 6vw; }
.matrix-head { text-align: center; margin-bottom: 40px; }
.matrix-head span { font-size: 0.75rem; letter-spacing: 0.2em; text-transform: uppercase; color: var(--pulse-light); font-weight: 700; }
.matrix-head h2 { font-family: var(--font-heading); font-size: 2.2rem; margin-top: 6px; }
.matrix-grid { max-width: 1360px; margin: 0 auto; display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.matrix-card { background: var(--card-ring); border: 1px solid var(--border-pulse); border-radius: 8px; padding: 26px 20px; text-align: center; }
.sensor-icon { font-size: 1.8rem; margin-bottom: 10px; }
.metric-val { font-family: var(--font-heading); font-size: 1.25rem; color: #fff; margin-bottom: 8px; font-weight: 700; }
.matrix-card p { font-size: 0.85rem; color: var(--text-muted); line-height: 1.5; }

.ring-studio-section { padding: 90px 6vw; max-width: 1000px; margin: 0 auto; }
.ring-studio-card { background: var(--card-ring); border: 1px solid var(--border-pulse); border-radius: 16px; padding: 48px; text-align: center; }
.ring-studio-card h2 { font-family: var(--font-heading); font-size: 2.2rem; margin: 8px 0 12px; }
.ring-studio-card p { color: var(--text-muted); font-size: 0.95rem; margin-bottom: 30px; }
.studio-swatches-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-bottom: 30px; }
.swatch-option { background: rgba(255, 255, 255, 0.03); border: 1px solid var(--border-pulse); border-radius: 8px; padding: 24px 16px; cursor: pointer; transition: var(--transition); }
.swatch-option.active { border-color: var(--pulse-violet); background: rgba(124, 58, 237, 0.15); }
.ring-circle { width: 50px; height: 50px; border-radius: 50%; margin: 0 auto 14px; border: 2px solid rgba(255, 255, 255, 0.2); }
.ring-circle.stealth { background: #18191f; }
.ring-circle.platinum { background: linear-gradient(135deg, #e2e8f0 0%, #94a3b8 100%); }
.ring-circle.gold { background: linear-gradient(135deg, #fde047 0%, #ca8a04 100%); }
.ring-circle.rose { background: linear-gradient(135deg, #fbcfe8 0%, #db2777 100%); }
.swatch-option h4 { font-size: 1rem; color: #fff; margin-bottom: 4px; }
.swatch-option span { font-size: 0.75rem; color: var(--text-muted); display: block; }
.sizing-kit-callout { background: rgba(124, 58, 237, 0.1); border: 1px solid var(--border-pulse); border-radius: 8px; padding: 18px 24px; font-size: 0.88rem; color: var(--pulse-light); margin-bottom: 24px; }
.btn-wide { width: 100%; padding: 16px; font-size: 0.95rem; }

.ring-footer { border-top: 1px solid var(--border-pulse); padding: 50px 6vw; text-align: center; font-size: 0.8rem; color: var(--text-muted); }
.ring-footer-title { font-family: var(--font-heading); font-size: 1.15rem; letter-spacing: 0.08em; color: var(--pulse-light); margin-bottom: 6px; }

@media (max-width: 900px) {
  .ring-menu { display: none; }
  .ring-hero { grid-template-columns: 1fr; }
  .matrix-grid { grid-template-columns: 1fr 1fr; }
  .studio-swatches-grid { grid-template-columns: 1fr 1fr; }
}