/* =====================================================
   SEQUIEM — style.css
   Thème sombre/théâtral, responsive, vanilla CSS
   ===================================================== */

/* === Variables === */
:root {
  --bg:         #07070f;
  --bg-alt:     #0c0c18;
  --surface:    #111120;
  --border:     #252538;
  --text:       #e8e4dc;
  --muted:      #908ba0;
  --gold:       #c9a84c;
  --gold-light: #e8c97a;
  --gold-dim:   rgba(201,168,76,.15);
  --purple:     #7b4fa2;
  --font:       -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  --serif:      Georgia, 'Times New Roman', serif;
  --radius:     8px;
  --ease:       0.3s ease;
  --max-w:      1100px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  overflow-x: hidden;
}

a {
  color: var(--gold);
  text-decoration: none;
  transition: color var(--ease);
}
a:hover { color: var(--gold-light); }

ul { list-style: none; }

/* === Container === */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}

/* =====================================================
   NAVIGATION
   ===================================================== */
#navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 200;
  padding: 22px 0;
  transition: background var(--ease), padding var(--ease), box-shadow var(--ease);
}

#navbar.scrolled {
  background: rgba(7,7,15,.94);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  padding: 14px 0;
  box-shadow: 0 2px 24px rgba(0,0,0,.5);
}

.nav-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.nav-logo {
  font-family: var(--serif);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--gold);
  letter-spacing: .08em;
  flex-shrink: 0;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 30px;
}

.nav-links a {
  color: var(--muted);
  font-size: .8rem;
  letter-spacing: .08em;
  text-transform: uppercase;
}
.nav-links a:hover { color: var(--gold); }

/* Hamburger */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
  z-index: 210;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform var(--ease), opacity var(--ease);
}
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* =====================================================
   HERO
   ===================================================== */
#hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  text-align: center;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 70% 55% at 50% 65%, rgba(123,79,162,.2) 0%, transparent 65%),
    radial-gradient(ellipse 90% 50% at 50% 100%, rgba(201,168,76,.07) 0%, transparent 55%),
    linear-gradient(175deg, #09090f 0%, #0d0b1a 50%, #07070f 100%);
}

/* Étoiles CSS — pas d'images externes */
.hero-bg::before,
.hero-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(1px 1px at  8% 12%, rgba(255,255,255,.14) 0%, transparent 0%),
    radial-gradient(1px 1px at 22% 38%, rgba(255,255,255,.09) 0%, transparent 0%),
    radial-gradient(1px 1px at 35%  5%, rgba(255,255,255,.12) 0%, transparent 0%),
    radial-gradient(1px 1px at 48% 22%, rgba(255,255,255,.07) 0%, transparent 0%),
    radial-gradient(1px 1px at 62% 15%, rgba(255,255,255,.11) 0%, transparent 0%),
    radial-gradient(1px 1px at 74% 42%, rgba(255,255,255,.08) 0%, transparent 0%),
    radial-gradient(1px 1px at 88%  8%, rgba(255,255,255,.13) 0%, transparent 0%),
    radial-gradient(1px 1px at 93% 28%, rgba(255,255,255,.06) 0%, transparent 0%);
}
.hero-bg::after {
  background-image:
    radial-gradient(1px 1px at 14% 65%, rgba(255,255,255,.07) 0%, transparent 0%),
    radial-gradient(1px 1px at 27% 80%, rgba(255,255,255,.10) 0%, transparent 0%),
    radial-gradient(1px 1px at 52% 70%, rgba(255,255,255,.06) 0%, transparent 0%),
    radial-gradient(1px 1px at 66% 85%, rgba(255,255,255,.08) 0%, transparent 0%),
    radial-gradient(1px 1px at 79% 60%, rgba(255,255,255,.12) 0%, transparent 0%),
    radial-gradient(1px 1px at 91% 75%, rgba(255,255,255,.07) 0%, transparent 0%);
}

.hero-content {
  position: relative;
  z-index: 1;
  padding: 0 24px;
}

.hero-eyebrow {
  font-size: .75rem;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 18px;
  opacity: 0;
  animation: fadeUp .8s ease .3s forwards;
}

.hero-title {
  font-family: var(--serif);
  font-size: clamp(4.5rem, 13vw, 10rem);
  font-weight: 400;
  letter-spacing: .06em;
  line-height: 1;
  color: var(--text);
  text-shadow: 0 0 80px rgba(201,168,76,.25);
  opacity: 0;
  animation: fadeUp 1s ease .55s forwards;
}

.hero-tagline {
  font-size: clamp(.85rem, 1.8vw, 1rem);
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--muted);
  margin-top: 22px;
  opacity: 0;
  animation: fadeUp .8s ease .85s forwards;
}

.hero-cta {
  display: inline-block;
  margin-top: 44px;
  padding: 13px 40px;
  border: 1px solid var(--gold);
  color: var(--gold);
  font-size: .8rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  border-radius: 2px;
  transition: background var(--ease), color var(--ease);
  opacity: 0;
  animation: fadeUp .8s ease 1.1s forwards;
}
.hero-cta:hover {
  background: var(--gold);
  color: var(--bg);
}

/* Scroll indicator */
.hero-scroll {
  position: absolute;
  bottom: 36px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  opacity: 0;
  animation: fadeIn 1s ease 1.8s forwards;
}
.scroll-line {
  display: block;
  width: 1px;
  height: 48px;
  background: linear-gradient(to bottom, transparent, var(--gold));
  animation: scrollPulse 2s ease infinite 2s;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(22px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: .6; }
}
@keyframes scrollPulse {
  0%, 100% { transform: scaleY(1); opacity: .6; }
  50%      { transform: scaleY(.6); opacity: .3; }
}

/* =====================================================
   SECTIONS — base
   ===================================================== */
.section { padding: 104px 0; }
.section-alt { background: var(--bg-alt); }

.section-header {
  text-align: center;
  margin-bottom: 68px;
}

.section-label {
  display: inline-block;
  font-size: .7rem;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 16px;
  padding: 5px 14px;
  border: 1px solid rgba(201,168,76,.3);
  border-radius: 2px;
}

.section-header h2 {
  font-family: var(--serif);
  font-size: clamp(2rem, 4.5vw, 3.2rem);
  font-weight: 400;
  color: var(--text);
  line-height: 1.2;
}

/* =====================================================
   INTRODUCTION
   ===================================================== */
.intro-body {
  max-width: 780px;
  margin: 0 auto;
  text-align: center;
}
.intro-body p {
  font-size: 1.08rem;
  color: var(--muted);
  line-height: 1.85;
  margin-bottom: 20px;
}
.intro-body p:last-child { margin-bottom: 0; }

/* =====================================================
   CARDS
   ===================================================== */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 22px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 28px;
  transition: border-color var(--ease), transform var(--ease), box-shadow var(--ease);
}
.card:hover {
  border-color: rgba(201,168,76,.4);
  transform: translateY(-5px);
  box-shadow: 0 12px 40px rgba(0,0,0,.35), 0 0 40px var(--gold-dim);
}

.card-icon {
  font-size: 2.2rem;
  color: var(--gold);
  margin-bottom: 18px;
  display: block;
}

.card h3 {
  font-family: var(--serif);
  font-size: 1.3rem;
  font-weight: 400;
  color: var(--text);
  margin-bottom: 12px;
}

.card p {
  color: var(--muted);
  font-size: .93rem;
  line-height: 1.75;
}

/* =====================================================
   FEATURE — Bühne
   ===================================================== */
.feature {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 72px;
  align-items: center;
}

.feature-text h3 {
  font-family: var(--serif);
  font-size: 1.9rem;
  font-weight: 400;
  color: var(--text);
  margin-bottom: 20px;
  line-height: 1.3;
}

.feature-text p {
  color: var(--muted);
  margin-bottom: 16px;
  line-height: 1.8;
}

.feature-list {
  margin-top: 28px;
  display: flex;
  flex-direction: column;
  gap: 11px;
}
.feature-list li {
  color: var(--muted);
  font-size: .93rem;
  padding-left: 22px;
  position: relative;
}
.feature-list li::before {
  content: '◆';
  position: absolute;
  left: 0;
  top: 5px;
  color: var(--gold);
  font-size: .45rem;
}

/* Visuel scène CSS — aucune image externe */
.stage-scene {
  position: relative;
  width: 100%;
  padding-bottom: 72%;
  border-radius: var(--radius);
  overflow: hidden;
  background: #04040c;
  border: 1px solid var(--border);
}

.stage-curtain {
  position: absolute;
  top: 0;
  width: 28%;
  height: 82%;
  background: linear-gradient(160deg, #2e1b50, #16102a);
}
.stage-curtain.left  { left: 0;  border-radius: 0 0 50% 0; }
.stage-curtain.right { right: 0; border-radius: 0 0 0 50%; }
.stage-curtain::after {
  content: '';
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    to right,
    rgba(255,255,255,.025) 0 2px,
    transparent 2px 10px
  );
}

.stage-spotlight {
  position: absolute;
  top: -10%;
  left: 50%;
  transform: translateX(-50%);
  width: 55%;
  height: 110%;
  background: radial-gradient(ellipse 55% 80% at 50% 5%,
    rgba(201,168,76,.22) 0%,
    rgba(201,168,76,.06) 40%,
    transparent 70%);
}

.stage-glow {
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 60%;
  height: 30%;
  background: radial-gradient(ellipse 80% 60% at 50% 100%,
    rgba(201,168,76,.12) 0%, transparent 70%);
}

.stage-floor {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 18%;
  background: linear-gradient(to top, rgba(201,168,76,.04), transparent);
  border-top: 1px solid rgba(201,168,76,.12);
}

/* =====================================================
   KUNSTSZENE GRID
   ===================================================== */
.kunst-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 0;
}

.kunst-item {
  padding: 36px 28px;
  border-top: 2px solid var(--border);
  border-right: 1px solid var(--border);
  transition: border-top-color var(--ease), background var(--ease);
}
.kunst-item:last-child { border-right: none; }
.kunst-item:hover {
  border-top-color: var(--gold);
  background: rgba(201,168,76,.02);
}

.kunst-num {
  font-size: .7rem;
  letter-spacing: .18em;
  color: var(--gold);
  margin-bottom: 14px;
  font-weight: 700;
}

.kunst-item h3 {
  font-family: var(--serif);
  font-size: 1.15rem;
  font-weight: 400;
  color: var(--text);
  margin-bottom: 12px;
}

.kunst-item p {
  color: var(--muted);
  font-size: .88rem;
  line-height: 1.72;
}

/* =====================================================
   FOOTER
   ===================================================== */
footer {
  background: #040408;
  padding: 80px 0 40px;
  border-top: 1px solid var(--border);
}

.footer-top { margin-bottom: 60px; }

.footer-logo {
  font-family: var(--serif);
  font-size: 2.2rem;
  color: var(--gold);
  letter-spacing: .08em;
  margin-bottom: 8px;
}

.footer-tagline {
  color: var(--muted);
  font-size: .82rem;
  letter-spacing: .12em;
}

.partners-section { margin-bottom: 60px; }

.partners-title {
  font-family: var(--serif);
  font-size: 1.6rem;
  font-weight: 400;
  color: var(--text);
  margin-bottom: 28px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
}

.partners-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.partners-loading {
  color: var(--muted);
  font-size: .88rem;
}

.partner-link {
  display: inline-block;
  padding: 8px 20px;
  border: 1px solid var(--border);
  border-radius: 2px;
  color: var(--muted);
  font-size: .84rem;
  letter-spacing: .04em;
  transition: border-color var(--ease), color var(--ease), background var(--ease);
}
.partner-link:hover {
  border-color: var(--gold);
  color: var(--gold);
  background: var(--gold-dim);
}

.footer-bottom {
  padding-top: 28px;
  border-top: 1px solid var(--border);
  text-align: center;
}
.footer-bottom p {
  color: var(--muted);
  font-size: .78rem;
  letter-spacing: .04em;
}

/* =====================================================
   FADE-IN (Intersection Observer)
   ===================================================== */
.fade-in {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity .7s ease, transform .7s ease;
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* =====================================================
   RESPONSIVE
   ===================================================== */
@media (max-width: 900px) {
  .feature {
    grid-template-columns: 1fr;
    gap: 48px;
  }
  .feature-visual { order: -1; }
  .stage-scene { max-width: 400px; margin: 0 auto; }

  .kunst-grid { grid-template-columns: 1fr 1fr; }
  .kunst-item { border-right: none; }
}

@media (max-width: 768px) {
  .nav-toggle { display: flex; }

  .nav-links {
    position: fixed;
    top: 0; right: 0;
    width: min(72%, 300px);
    height: 100vh;
    background: var(--surface);
    flex-direction: column;
    justify-content: center;
    align-items: flex-start;
    gap: 28px;
    padding: 40px 32px;
    transform: translateX(100%);
    transition: transform .35s ease;
    border-left: 1px solid var(--border);
    z-index: 205;
  }
  .nav-links.open { transform: translateX(0); }
  .nav-links a { font-size: .95rem; }

  .section { padding: 80px 0; }
  .cards { grid-template-columns: 1fr; }
}

@media (max-width: 540px) {
  .kunst-grid { grid-template-columns: 1fr; }
  .partners-list { gap: 8px; }
  .section { padding: 64px 0; }
}