/* ============================================
   EMELYSS V4 — Editorial Premium
   Alternance noir profond × ivoire chaud
   Apple × Aesop × Hermès
   ============================================ */

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

html {
  scroll-behavior: auto;
  -webkit-text-size-adjust: 100%;
}

body {
  overflow-x: hidden;
  background: var(--obsidian);
  color: var(--cream);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.65;
  font-weight: 300;
}

a { color: inherit; text-decoration: none; }
button { background: none; border: none; cursor: pointer; font-family: inherit; color: inherit; }
img { max-width: 100%; display: block; }
ul, ol { list-style: none; }
video { display: block; max-width: 100%; }

:root {
  /* === PALETTE ADOUCIE V5 === */
  --obsidian: #161310;          /* Noir profond mais moins agressif (était #0a0908) */
  --obsidian-soft: #1f1c17;
  --onyx: #2a2620;
  --carbon: #3a342c;
  --ivory: #f5ebd6;             /* Ivoire chaud */
  --ivory-bright: #faf2dd;
  --ivory-soft: #ebe0c4;
  --cream: #f4ecd8;
  --cream-warm: #e8dec7;
  --ash: #9b9180;               /* Plus clair pour meilleure lisibilité */
  --smoke: #6e685e;
  --charcoal: #3a342c;
  --champagne: #d4b87a;         /* Or champagne légèrement plus lumineux */
  --champagne-light: #e4cd95;
  --champagne-deep: #b8965c;
  --champagne-rich: #b89656;
  --line-dark: rgba(244, 236, 216, 0.12);
  --line-light: rgba(58, 52, 44, 0.14);
  
  /* === TYPO === */
  --font-display: 'Cormorant Garamond', 'Times New Roman', serif;
  --font-sans: 'Inter Tight', 'Helvetica Neue', sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', Menlo, monospace;
  
  /* === SPACING === */
  --gutter: clamp(1.5rem, 4vw, 5rem);
  --section-py: clamp(8rem, 18vw, 16rem);
  --max-width: 1600px;
  
  /* === TRANSITIONS === */
  --ease-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-power: cubic-bezier(0.65, 0, 0.35, 1);
  --ease-slow: cubic-bezier(0.22, 1, 0.36, 1);
}

/* === SECTIONS - NOIR === */
.section-dark {
  background: var(--obsidian);
  color: var(--cream);
}

/* === SECTIONS - IVOIRE (alternance dramatique) === */
.section-light {
  background: var(--ivory);
  color: var(--charcoal);
}
.section-light h1, .section-light h2, .section-light h3 { color: var(--charcoal); }
.section-light .gold-text { color: var(--champagne-rich); }
.section-light .body-text { color: var(--charcoal); opacity: 0.8; }
.section-light .eyebrow { color: var(--charcoal); opacity: 0.6; }
.section-light .eyebrow::before { background: var(--champagne-rich); opacity: 0.7; }
.section-light .mono { color: var(--charcoal); opacity: 0.6; }

/* === TYPO === */
.serif { font-family: var(--font-display); font-weight: 400; }
.italic { font-style: italic; }
.gold-text { color: var(--champagne); }

h1, h2, h3, h4, h5 {
  font-family: var(--font-display);
  font-weight: 400;
  line-height: 1.02;
  letter-spacing: -0.005em;
  color: var(--cream);
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 400;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--ash);
  display: inline-flex;
  align-items: center;
  gap: 1rem;
}
.eyebrow::before {
  content: '';
  width: 3rem;
  height: 1px;
  background: var(--champagne);
  opacity: 0.7;
}

.body-text {
  font-size: clamp(1rem, 1.1vw, 1.125rem);
  line-height: 1.85;
  color: var(--cream-warm);
  font-weight: 300;
  max-width: 38em;
}

.mono {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  font-weight: 400;
  color: var(--ash);
}

/* === LAYOUT === */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--gutter);
  position: relative;
}
.container-narrow {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 var(--gutter);
}
.container-wide {
  max-width: 100%;
  padding: 0 var(--gutter);
}

section { position: relative; }

/* === NAVIGATION === */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 2rem var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: background 0.8s var(--ease-expo), backdrop-filter 0.8s var(--ease-expo), padding 0.8s var(--ease-expo), color 0.8s var(--ease-expo);
  color: var(--cream);
}
.nav.scrolled {
  background: rgba(10, 9, 8, 0.85);
  backdrop-filter: blur(24px) saturate(160%);
  -webkit-backdrop-filter: blur(24px) saturate(160%);
  padding: 1.1rem var(--gutter);
  border-bottom: 1px solid var(--line-dark);
}
.nav.on-light {
  color: var(--charcoal);
}
.nav.on-light.scrolled {
  background: rgba(245, 235, 214, 0.9);
  border-bottom-color: var(--line-light);
}

.nav-logo {
  font-family: var(--font-display);
  font-size: 1.35rem;
  letter-spacing: 0.22em;
  font-weight: 400;
}
.nav-links {
  display: flex;
  gap: 3rem;
}
.nav-links a {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  font-weight: 400;
  position: relative;
  padding: 0.5rem 0;
  opacity: 0.8;
  transition: opacity 0.5s, color 0.5s;
}
.nav-links a:hover { opacity: 1; color: var(--champagne); }
.nav-links a::after {
  content: '';
  position: absolute;
  left: 0; bottom: 0;
  width: 100%;
  height: 1px;
  background: var(--champagne);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.6s var(--ease-expo);
}
.nav-links a:hover::after {
  transform: scaleX(1);
  transform-origin: left;
}

.nav-lang {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
}
.nav-lang button {
  font-weight: 400;
  opacity: 0.5;
  transition: opacity 0.4s, color 0.4s;
  padding: 0.4rem;
}
.nav-lang button.active { opacity: 1; color: var(--champagne); }
.nav-lang button:hover { opacity: 1; }
.nav-lang .sep { opacity: 0.4; }

/* === BOUTONS === */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  padding: 1.25rem 2.5rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  font-weight: 400;
  border: 1px solid var(--cream);
  color: var(--cream);
  position: relative;
  overflow: hidden;
  cursor: pointer;
  transition: color 0.7s var(--ease-expo), border-color 0.7s;
}
.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--cream);
  transform: translateY(101%);
  transition: transform 0.7s var(--ease-expo);
  z-index: 0;
}
.btn span { position: relative; z-index: 1; }
.btn:hover::before { transform: translateY(0); }
.btn:hover { color: var(--obsidian); }

.btn-gold {
  border-color: var(--champagne);
  color: var(--champagne);
}
.btn-gold::before { background: var(--champagne); }
.btn-gold:hover { color: var(--obsidian); }

.btn-dark {
  border-color: var(--charcoal);
  color: var(--charcoal);
}
.btn-dark::before { background: var(--charcoal); }
.btn-dark:hover { color: var(--ivory); }

.btn-large {
  padding: 1.5rem 3rem;
  font-size: 0.75rem;
}

/* === ANIMATIONS === */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(40px); }
  to { opacity: 1; transform: translateY(0); }
}

.split-line {
  display: block;
  overflow: hidden;
  line-height: inherit;
}
.split-line > span {
  display: inline-block;
  transform: translateY(110%);
  will-change: transform;
}

.split-char {
  display: inline-block;
  overflow: hidden;
}
.split-char > span {
  display: inline-block;
  transform: translateY(110%);
  will-change: transform;
}

.mask-reveal {
  position: relative;
  overflow: hidden;
}
.mask-reveal img,
.mask-reveal .mask-content {
  transform: scale(1.15);
  transition: transform 2.2s var(--ease-expo);
  will-change: transform;
}
.mask-reveal::after {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--obsidian);
  transform: translateX(0);
  transition: transform 1.8s var(--ease-expo);
  z-index: 1;
}
.mask-reveal.is-revealed::after {
  transform: translateX(101%);
}
.mask-reveal.is-revealed img,
.mask-reveal.is-revealed .mask-content {
  transform: scale(1);
}

.fade-up {
  opacity: 0;
  transform: translateY(50px);
  transition: opacity 1.6s var(--ease-expo), transform 1.6s var(--ease-expo);
  will-change: transform, opacity;
}
.fade-up.is-visible {
  opacity: 1;
  transform: translateY(0);
}

::selection { background: var(--champagne); color: var(--obsidian); }
::-webkit-scrollbar { width: 0; height: 0; }

/* === ONBOARDING CINÉMATIQUE - Rideau de cinéma === */
.loader {
  position: fixed;
  inset: 0;
  z-index: 10000;
  pointer-events: none;
  display: block;
}

.loader-curtain {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 50%;
  background: var(--obsidian);
  z-index: 10001;
  transition: transform 1.4s cubic-bezier(0.76, 0, 0.24, 1) 2.6s;
}
.loader-curtain.left { left: 0; }
.loader-curtain.right { right: 0; }

.loader.is-hidden .loader-curtain.left { transform: translateX(-100%); }
.loader.is-hidden .loader-curtain.right { transform: translateX(100%); }

.loader-content {
  position: absolute;
  inset: 0;
  z-index: 10002;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  transition: opacity 0.8s var(--ease-expo) 2.2s, visibility 0.8s 2.2s;
}
.loader.is-hidden .loader-content { 
  opacity: 0; 
  visibility: hidden;
}

.loader-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.5em;
  text-transform: uppercase;
  color: var(--champagne);
  margin-bottom: 2.5rem;
  opacity: 0;
  animation: loaderEyebrow 0.8s var(--ease-expo) 0.2s forwards;
}
@keyframes loaderEyebrow {
  to { opacity: 0.8; }
}

.loader-logo {
  font-family: var(--font-display);
  font-size: clamp(3rem, 7vw, 5.5rem);
  letter-spacing: 0.2em;
  color: var(--cream);
  overflow: hidden;
  margin-bottom: 0;
  font-weight: 300;
}
.loader-logo .char {
  display: inline-block;
  animation: loaderChar 1.2s var(--ease-expo) forwards;
  animation-delay: calc(0.6s + var(--delay));
  transform: translateY(110%);
  opacity: 0;
}
@keyframes loaderChar { 
  to { transform: translateY(0); opacity: 1; }
}

.loader-line {
  width: 0;
  height: 1px;
  background: var(--champagne);
  margin-top: 2.5rem;
  animation: loaderLine 1s var(--ease-expo) 1.8s forwards;
}
@keyframes loaderLine { to { width: 100px; } }

.loader-baseline {
  margin-top: 1.5rem;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.45em;
  text-transform: uppercase;
  color: var(--cream-warm);
  opacity: 0;
  animation: fadeIn 0.8s 2s forwards;
}
@keyframes fadeIn { to { opacity: 0.85; } }

/* === GRAIN GLOBAL === */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='3' /%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.4'/%3E%3C/svg%3E");
  opacity: 0.05;
  pointer-events: none;
  z-index: 1000;
  mix-blend-mode: overlay;
}

/* === ACCESSIBILITÉ === */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .split-line > span,
  .split-char > span { transform: translateY(0); }
  .mask-reveal::after { display: none; }
  .mask-reveal img, .mask-reveal .mask-content { transform: scale(1); }
  .fade-up { opacity: 1; transform: none; }
  video { display: none; }
}

@media (max-width: 900px) {
  .nav-links { display: none; }
}