/* ============================================================================
   CLINIOS One Premium — Commercial Site
   LONGEV'AI · Clinical Intelligence
   Aesthetic: Apple-grade refinement × Luxury (gold, marble, silk)
============================================================================ */

:root {
  --ink-deep: #0A0908; --ink-mid: #2C2A26; --ink-soft: #5C594F;
  --ink-mute: #8B8678; --ink-faint: #C9C5B8;
  --bg-ivory: #FAF8F3; --bg-pearl: #F4F1E8; --bg-cream: #EDE7D6; --bg-marble: #F7F5EE;
  --green-deep: #0E2E16; --green-shadow: #1B4332; --green-soft: #2D5A3D;
  --gold-deep: #8B6A1F; --gold-warm: #B8923E; --gold-pale: #D4B86A; --gold-mist: #E8D9A8;
  --red-swiss: #A4243B; --red-shadow: #7A1A2C;
  --white-pure: #FFFFFF; --white-silk: #FDFBF7;
  --font-display: 'Cormorant Garamond', 'Cormorant', Georgia, serif;
  --font-body: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', 'Courier New', monospace;
  --text-xs: 0.75rem; --text-sm: 0.875rem; --text-base: 1rem; --text-lg: 1.125rem;
  --text-xl: 1.375rem; --text-2xl: 1.75rem; --text-3xl: 2.25rem; --text-4xl: 3rem;
  --text-5xl: 4rem; --text-6xl: 5.5rem; --text-7xl: 7.5rem;
  --space-1: 0.25rem; --space-2: 0.5rem; --space-3: 0.75rem; --space-4: 1rem;
  --space-5: 1.5rem; --space-6: 2rem; --space-7: 3rem; --space-8: 4rem;
  --space-9: 6rem; --space-10: 8rem; --space-11: 12rem;
  --container-narrow: 880px; --container-default: 1180px; --container-wide: 1440px;
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-out-back: cubic-bezier(0.34, 1.56, 0.64, 1);
  --ease-in-out-quart: cubic-bezier(0.76, 0, 0.24, 1);
  --duration-quick: 0.3s; --duration-normal: 0.6s; --duration-slow: 1.2s; --duration-epic: 2s;
  --border-hair: 1px solid rgba(10, 9, 8, 0.08);
  --border-fine: 1px solid rgba(10, 9, 8, 0.15);
  --shadow-soft: 0 4px 20px rgba(10, 9, 8, 0.04), 0 1px 3px rgba(10, 9, 8, 0.06);
  --shadow-luxe: 0 24px 64px rgba(10, 9, 8, 0.12), 0 8px 16px rgba(10, 9, 8, 0.04);
  --shadow-gold: 0 0 32px rgba(184, 146, 62, 0.25);
}

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
  text-rendering: optimizeLegibility;
  scroll-padding-top: 80px;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--ink-deep);
  background: var(--bg-ivory);
  overflow-x: hidden;
  font-feature-settings: "kern" 1, "liga" 1, "calt" 1;
}

img, svg, video { max-width: 100%; display: block; }
button { font: inherit; cursor: pointer; border: none; background: none; color: inherit; }
a { color: inherit; text-decoration: none; transition: color var(--duration-quick) var(--ease-out-expo); }
input, textarea, select { font: inherit; color: inherit; }

.marble-bg { position: relative; }
.marble-bg::before {
  content: ''; position: absolute; inset: 0;
  background-image: 
    radial-gradient(ellipse at 20% 30%, rgba(184, 146, 62, 0.03), transparent 50%),
    radial-gradient(ellipse at 80% 70%, rgba(14, 46, 22, 0.02), transparent 50%),
    radial-gradient(ellipse at 50% 50%, rgba(212, 184, 106, 0.02), transparent 70%);
  pointer-events: none; z-index: 0;
}
.marble-bg > * { position: relative; z-index: 1; }

.display, h1, h2, h3, h4, h5, .heading {
  font-family: var(--font-display);
  font-weight: 400; line-height: 1.05; letter-spacing: -0.02em;
  color: var(--ink-deep);
}
.display-hero {
  font-family: var(--font-display);
  font-size: clamp(3rem, 8vw, var(--text-7xl));
  font-weight: 300; line-height: 0.95; letter-spacing: -0.035em;
}
.display-hero em { font-style: italic; font-weight: 400; color: var(--gold-warm); }
h1, .h1 { font-size: clamp(2.5rem, 5.5vw, var(--text-6xl)); font-weight: 300; line-height: 1; letter-spacing: -0.03em; }
h2, .h2 { font-size: clamp(2rem, 4vw, var(--text-5xl)); font-weight: 400; line-height: 1.05; letter-spacing: -0.025em; }
h3, .h3 { font-size: clamp(1.5rem, 2.5vw, var(--text-3xl)); font-weight: 500; line-height: 1.15; letter-spacing: -0.015em; }
h4, .h4 { font-size: var(--text-2xl); font-weight: 500; }

em, .italic { font-style: italic; }

.kicker {
  font-family: var(--font-body); font-size: var(--text-xs); font-weight: 500;
  letter-spacing: 0.18em; text-transform: uppercase; color: var(--gold-warm);
}
.eyebrow {
  font-family: var(--font-body); font-size: var(--text-sm); font-weight: 500;
  letter-spacing: 0.12em; text-transform: uppercase; color: var(--ink-soft);
}
.lead { font-size: clamp(1.125rem, 1.5vw, var(--text-xl)); line-height: 1.55; color: var(--ink-mid); font-weight: 400; }
.body-lg { font-size: var(--text-lg); line-height: 1.7; color: var(--ink-mid); }
.caption { font-size: var(--text-sm); color: var(--ink-soft); line-height: 1.5; }
.micro { font-size: var(--text-xs); color: var(--ink-mute); letter-spacing: 0.03em; }

.container {
  width: 100%; max-width: var(--container-default);
  margin: 0 auto; padding: 0 clamp(1.5rem, 4vw, 3rem);
}
.container-narrow { max-width: var(--container-narrow); margin: 0 auto; padding: 0 clamp(1.5rem, 4vw, 3rem); }
.container-wide { max-width: var(--container-wide); margin: 0 auto; padding: 0 clamp(1.5rem, 4vw, 3rem); }

section { padding: clamp(var(--space-9), 12vw, var(--space-11)) 0; position: relative; }
section.compact { padding: var(--space-8) 0; }

.section-ivory { background: var(--bg-ivory); }
.section-pearl { background: var(--bg-pearl); }
.section-marble { background: var(--bg-marble); }
.section-deep { background: var(--green-deep); color: var(--bg-ivory); }
.section-deep h1, .section-deep h2, .section-deep h3 { color: var(--bg-ivory); }
.section-ink { background: var(--ink-deep); color: var(--bg-ivory); }
.section-ink h1, .section-ink h2, .section-ink h3 { color: var(--bg-ivory); }

.topnav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  padding: var(--space-4) clamp(1.5rem, 4vw, 3rem);
  display: flex; align-items: center; justify-content: space-between;
  backdrop-filter: blur(20px) saturate(180%); -webkit-backdrop-filter: blur(20px) saturate(180%);
  background: rgba(250, 248, 243, 0.72);
  border-bottom: var(--border-hair);
  transition: background var(--duration-quick) var(--ease-out-expo),
              transform var(--duration-normal) var(--ease-out-expo);
}
.topnav.is-hidden { transform: translateY(-100%); }
.topnav-brand {
  display: flex; align-items: center;
  transition: opacity var(--duration-normal) var(--ease-out-expo);
}
.topnav-brand:hover { opacity: 0.85; }
.topnav-logo {
  display: flex; flex-direction: column; align-items: flex-start;
  line-height: 1.0;
}
.topnav-logo .longev {
  font-family: var(--font-display); font-style: italic;
  font-size: 1.625rem; font-weight: 500;
  color: var(--green-deep); letter-spacing: -0.015em;
  line-height: 1.0;
}
.topnav-logo .reg {
  font-size: 0.45em; vertical-align: super;
  color: var(--gold-warm); font-style: normal;
  margin-left: 1px;
}
.topnav-logo .clinical-intel {
  font-family: var(--font-display); font-style: italic;
  font-size: 0.82rem; font-weight: 400;
  color: var(--green-deep); opacity: 0.75;
  letter-spacing: 0.06em;
  margin-top: 4px;
}
.topnav-menu { display: flex; align-items: center; gap: var(--space-6); }
.topnav-menu a {
  font-size: var(--text-sm); color: var(--ink-mid); font-weight: 500;
  transition: color var(--duration-quick) var(--ease-out-expo); position: relative;
}
.topnav-menu a:hover { color: var(--ink-deep); }
.topnav-menu a::after {
  content: ''; position: absolute; bottom: -4px; left: 0;
  width: 0; height: 1px; background: var(--gold-warm);
  transition: width var(--duration-normal) var(--ease-out-expo);
}
.topnav-menu a:hover::after { width: 100%; }
.topnav-actions { display: flex; align-items: center; gap: var(--space-4); }

.lang-switcher { position: relative; }
.lang-switcher-btn {
  font-size: var(--text-xs); font-weight: 500; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--ink-mid);
  padding: var(--space-2) var(--space-3); border: var(--border-fine); border-radius: 2px;
  transition: all var(--duration-quick) var(--ease-out-expo);
}
.lang-switcher-btn:hover { border-color: var(--gold-warm); color: var(--gold-warm); }
.lang-dropdown {
  position: absolute; top: calc(100% + 8px); right: 0;
  min-width: 180px; background: var(--white-silk);
  border: var(--border-fine); box-shadow: var(--shadow-luxe); border-radius: 4px;
  padding: var(--space-2) 0;
  opacity: 0; pointer-events: none; transform: translateY(-8px);
  transition: all var(--duration-quick) var(--ease-out-expo);
}
.lang-dropdown.is-open { opacity: 1; pointer-events: auto; transform: translateY(0); }
.lang-dropdown a {
  display: flex; justify-content: space-between; align-items: center;
  padding: var(--space-2) var(--space-4); font-size: var(--text-sm); color: var(--ink-mid);
  transition: all var(--duration-quick) var(--ease-out-expo);
}
.lang-dropdown a:hover { background: var(--bg-pearl); color: var(--gold-warm); }
.lang-dropdown a .lang-tag {
  font-family: var(--font-mono); font-size: 0.7rem; color: var(--ink-mute); letter-spacing: 0.1em;
}

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: var(--space-3);
  padding: var(--space-4) var(--space-6);
  font-family: var(--font-body); font-size: var(--text-sm); font-weight: 500;
  letter-spacing: 0.05em; text-transform: uppercase;
  border: 1px solid transparent; border-radius: 2px; cursor: pointer;
  transition: all var(--duration-normal) var(--ease-out-expo);
  position: relative; overflow: hidden;
}
.btn-primary { background: var(--ink-deep); color: var(--bg-ivory); }
.btn-primary::before {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(135deg, var(--gold-deep), var(--gold-warm), var(--gold-pale));
  opacity: 0; transition: opacity var(--duration-normal) var(--ease-out-expo);
}
.btn-primary:hover::before { opacity: 1; }
.btn-primary span { position: relative; z-index: 1; }
.btn-primary:hover { box-shadow: var(--shadow-gold); transform: translateY(-1px); }

.btn-gold {
  background: linear-gradient(135deg, var(--gold-deep), var(--gold-warm));
  color: var(--white-pure); box-shadow: 0 4px 12px rgba(184, 146, 62, 0.25);
}
.btn-gold:hover {
  background: linear-gradient(135deg, var(--gold-warm), var(--gold-pale));
  box-shadow: 0 8px 24px rgba(184, 146, 62, 0.4); transform: translateY(-1px);
}

.btn-outline { background: transparent; color: var(--ink-deep); border-color: var(--ink-deep); }
.btn-outline:hover { background: var(--ink-deep); color: var(--bg-ivory); }

.btn-ghost { background: transparent; color: var(--ink-mid); padding: var(--space-3) 0; }
.btn-ghost::after { content: '→'; margin-left: var(--space-2); transition: transform var(--duration-normal) var(--ease-out-expo); }
.btn-ghost:hover { color: var(--gold-warm); }
.btn-ghost:hover::after { transform: translateX(8px); }

.btn-lg { padding: var(--space-5) var(--space-7); font-size: var(--text-base); }
.btn-xl { padding: var(--space-5) var(--space-8); font-size: var(--text-base); }

.card {
  background: var(--white-silk); border: var(--border-hair);
  padding: var(--space-7);
  transition: all var(--duration-normal) var(--ease-out-expo);
  position: relative; overflow: hidden;
}
.card:hover { border-color: var(--gold-mist); box-shadow: var(--shadow-luxe); transform: translateY(-4px); }

.card-luxe {
  background: var(--white-silk); border: 1px solid var(--gold-mist);
  padding: var(--space-8); position: relative; overflow: hidden;
}
.card-luxe::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--gold-deep), var(--gold-warm), var(--gold-pale), var(--gold-warm), var(--gold-deep));
}

.divider { height: 1px; background: linear-gradient(90deg, transparent, var(--ink-faint), transparent); border: none; margin: var(--space-7) 0; }
.divider-gold { width: 60px; height: 1px; background: var(--gold-warm); border: none; margin: var(--space-5) auto; }

.numeral {
  font-family: var(--font-display); font-style: italic; font-weight: 300;
  font-size: clamp(3rem, 5vw, 4.5rem); color: var(--gold-warm); line-height: 1; opacity: 0.6;
}

.grid { display: grid; gap: var(--space-6); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-auto { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }

@media (max-width: 880px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .topnav-logo .longev { font-size: 1.25rem; }
  .topnav-logo .clinical-intel { font-size: 0.7rem; }
}
@media (max-width: 520px) {
  .topnav-logo .clinical-intel { display: none; }
}

.reveal {
  opacity: 0; transform: translateY(40px);
  transition: opacity var(--duration-slow) var(--ease-out-expo),
              transform var(--duration-slow) var(--ease-out-expo);
}
.reveal.is-visible { opacity: 1; transform: translateY(0); }
.reveal-fade { opacity: 0; transition: opacity var(--duration-epic) var(--ease-out-expo); }
.reveal-fade.is-visible { opacity: 1; }
.reveal-slow {
  opacity: 0; transform: translateY(60px);
  transition: opacity 1.6s var(--ease-out-expo), transform 1.6s var(--ease-out-expo);
}
.reveal-slow.is-visible { opacity: 1; transform: translateY(0); }

.stagger-children > * {
  opacity: 0; transform: translateY(30px);
  transition: opacity var(--duration-slow) var(--ease-out-expo),
              transform var(--duration-slow) var(--ease-out-expo);
}
.stagger-children.is-visible > * { opacity: 1; transform: translateY(0); }
.stagger-children.is-visible > *:nth-child(1) { transition-delay: 0s; }
.stagger-children.is-visible > *:nth-child(2) { transition-delay: 0.1s; }
.stagger-children.is-visible > *:nth-child(3) { transition-delay: 0.2s; }
.stagger-children.is-visible > *:nth-child(4) { transition-delay: 0.3s; }
.stagger-children.is-visible > *:nth-child(5) { transition-delay: 0.4s; }
.stagger-children.is-visible > *:nth-child(6) { transition-delay: 0.5s; }
.stagger-children.is-visible > *:nth-child(7) { transition-delay: 0.6s; }
.stagger-children.is-visible > *:nth-child(8) { transition-delay: 0.7s; }
.stagger-children.is-visible > *:nth-child(9) { transition-delay: 0.8s; }
.stagger-children.is-visible > *:nth-child(10) { transition-delay: 0.9s; }

.text-center { text-align: center; }
.text-right { text-align: right; }
.text-gold { color: var(--gold-warm); }
.text-deep { color: var(--green-deep); }
.text-mute { color: var(--ink-mute); }
.uppercase { text-transform: uppercase; letter-spacing: 0.1em; }
.mt-1 { margin-top: var(--space-4); } .mt-2 { margin-top: var(--space-5); }
.mt-3 { margin-top: var(--space-6); } .mt-4 { margin-top: var(--space-7); }
.mt-5 { margin-top: var(--space-8); } .mt-6 { margin-top: var(--space-9); }
.mb-1 { margin-bottom: var(--space-4); } .mb-2 { margin-bottom: var(--space-5); }
.mb-3 { margin-bottom: var(--space-6); } .mb-4 { margin-bottom: var(--space-7); }
.mb-5 { margin-bottom: var(--space-8); } .mb-6 { margin-bottom: var(--space-9); }

[dir="rtl"] .topnav-menu { flex-direction: row-reverse; }
[dir="rtl"] .btn-ghost::after { content: '←'; transform: scaleX(1); }
[dir="rtl"] .btn-ghost:hover::after { transform: translateX(-8px); }

.cursor-dot {
  position: fixed; top: 0; left: 0;
  width: 6px; height: 6px; background: var(--ink-deep); border-radius: 50%;
  pointer-events: none; z-index: 9999;
  mix-blend-mode: difference; transform: translate(-50%, -50%);
  transition: width var(--duration-quick) var(--ease-out-expo),
              height var(--duration-quick) var(--ease-out-expo);
}
.cursor-ring {
  position: fixed; top: 0; left: 0;
  width: 36px; height: 36px;
  border: 1px solid var(--ink-deep); border-radius: 50%;
  pointer-events: none; z-index: 9999;
  mix-blend-mode: difference; transform: translate(-50%, -50%);
  transition: width var(--duration-normal) var(--ease-out-expo),
              height var(--duration-normal) var(--ease-out-expo),
              border-color var(--duration-normal) var(--ease-out-expo);
}
.cursor-active .cursor-ring { width: 56px; height: 56px; border-color: var(--gold-warm); }
@media (max-width: 1024px), (hover: none) {
  .cursor-dot, .cursor-ring { display: none; }
  body { cursor: auto; }
}

@media (max-width: 768px) {
  .topnav-menu { display: none; }
  section { padding: var(--space-8) 0; }
}