/* ════════════════════════════════════════════════════════════════
   FIDALYZ EVENT — Museum Noir Design System
   Événement 9 avril 2026 — Palais d'Iéna, CESE
   ════════════════════════════════════════════════════════════════ */

/* ─── CSS Custom Properties (Design Tokens) ──────────────── */
:root {
  /* Museum Noir Palette */
  --color-bg:           #0D0D0F;
  --color-surface:      #14141A;
  --color-surface-hover:#1A1A22;
  --color-border:       #2A2A35;

  /* Brand */
  --color-gold:         #C9A84C;
  --color-gold-light:   #D4BA6A;
  --color-gold-dim:     #8A7433;
  --color-cyan:         #5DC5DC;
  --color-cyan-dim:     #3A8A9A;
  --color-blue:         #2D69AA;

  /* Text */
  --color-text:         #E8E4DC;
  --color-text-muted:   #9A9690;
  --color-text-dim:     #6A6660;

  /* Semantic */
  --color-success:      #4CAF50;
  --color-error:        #E53935;
  --color-founder:      #C9A84C;

  /* Typography */
  --font-display:       'Cormorant Garamond', 'Georgia', serif;
  --font-mono:          'JetBrains Mono', 'Fira Code', monospace;
  --font-body:          'Source Sans 3', 'Source Sans Pro', system-ui, sans-serif;

  /* Spacing */
  --space-xs:   0.25rem;
  --space-sm:   0.5rem;
  --space-md:   1rem;
  --space-lg:   1.5rem;
  --space-xl:   2.5rem;
  --space-2xl:  4rem;
  --space-3xl:  6rem;

  /* Layout */
  --max-content: 72rem;  /* 1152px */
  --max-text:    42rem;  /* 672px */
  --border-radius: 4px;

  /* Transitions */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --duration-fast: 150ms;
  --duration-base: 300ms;
  --duration-slow: 600ms;
}

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

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

body {
  font-family: var(--font-body);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.65;
  min-height: 100vh;
  overflow-x: hidden;
}

/* ─── Typography ─────────────────────────────────────────── */
.display-xl {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 300;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--color-text);
}

.display-lg {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 400;
  line-height: 1.15;
  letter-spacing: -0.01em;
}

.display-sm {
  font-family: var(--font-display);
  font-size: clamp(1.25rem, 2.5vw, 1.75rem);
  font-weight: 400;
  line-height: 1.3;
  font-style: italic;
  color: var(--color-text-muted);
}

h1, .h1 {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 600;
  line-height: 1.2;
}

h2, .h2 {
  font-family: var(--font-display);
  font-size: clamp(1.375rem, 2.5vw, 1.875rem);
  font-weight: 500;
  line-height: 1.25;
}

h3, .h3 {
  font-family: var(--font-body);
  font-size: 1.125rem;
  font-weight: 600;
  line-height: 1.35;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-gold);
}

.body-lg {
  font-size: 1.125rem;
  line-height: 1.7;
}

.caption {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  line-height: 1.4;
}

.serial {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  letter-spacing: 0.12em;
  color: var(--color-gold);
}

.serial-lg {
  font-family: var(--font-mono);
  font-size: clamp(1.25rem, 3vw, 2rem);
  letter-spacing: 0.15em;
  color: var(--color-gold);
}

/* ─── Layout ─────────────────────────────────────────────── */
.container {
  max-width: var(--max-content);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.text-container {
  max-width: var(--max-text);
  margin: 0 auto;
}

.section {
  padding: var(--space-3xl) 0;
}

.section + .section {
  border-top: 1px solid var(--color-border);
}

/* ─── Hero Section ───────────────────────────────────────── */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: var(--space-2xl) var(--space-lg);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(
    ellipse at 50% 30%,
    rgba(201, 168, 76, 0.06) 0%,
    transparent 60%
  );
  pointer-events: none;
}

.hero-logo {
  width: clamp(180px, 30vw, 320px);
  margin-bottom: var(--space-xl);
  opacity: 0;
  animation: fadeInUp 1s var(--ease-out) 0.2s forwards;
}

.hero-title {
  opacity: 0;
  animation: fadeInUp 1s var(--ease-out) 0.5s forwards;
}

.hero-subtitle {
  margin-top: var(--space-md);
  opacity: 0;
  animation: fadeInUp 1s var(--ease-out) 0.7s forwards;
}

.hero-cta {
  margin-top: var(--space-xl);
  opacity: 0;
  animation: fadeInUp 1s var(--ease-out) 0.9s forwards;
}

/* ─── Gold Divider ───────────────────────────────────────── */
.divider {
  width: 60px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-gold), transparent);
  margin: var(--space-xl) auto;
}

.divider-wide {
  width: 120px;
}

/* ─── Buttons ────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 0.875rem 2rem;
  font-family: var(--font-body);
  font-size: 0.9375rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  text-decoration: none;
  border: none;
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: all var(--duration-base) var(--ease-out);
}

.btn-gold {
  background: var(--color-gold);
  color: var(--color-bg);
}

.btn-gold:hover {
  background: var(--color-gold-light);
  transform: translateY(-1px);
  box-shadow: 0 4px 20px rgba(201, 168, 76, 0.3);
}

.btn-outline {
  background: transparent;
  color: var(--color-gold);
  border: 1px solid var(--color-gold);
}

.btn-outline:hover {
  background: rgba(201, 168, 76, 0.08);
}

.btn-cyan {
  background: var(--color-cyan);
  color: var(--color-bg);
}

.btn-cyan:hover {
  background: #6DD0E5;
  transform: translateY(-1px);
  box-shadow: 0 4px 20px rgba(93, 197, 220, 0.3);
}

/* ─── Cards (billets catalogue) ──────────────────────────── */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-lg);
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  overflow: hidden;
  transition: all var(--duration-base) var(--ease-out);
  cursor: pointer;
}

.card:hover {
  border-color: var(--color-gold-dim);
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

.card-img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  background: var(--color-bg);
}

.card-body {
  padding: var(--space-md) var(--space-lg);
}

.card-country {
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-gold);
  margin-bottom: var(--space-xs);
}

.card-title {
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: 500;
  line-height: 1.3;
  margin-bottom: var(--space-sm);
}

.card-year {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--color-text-dim);
}

.card-badge {
  display: inline-block;
  padding: 2px 8px;
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  border-radius: 2px;
  margin-left: var(--space-sm);
}

.badge-unique {
  background: rgba(201, 168, 76, 0.15);
  color: var(--color-gold);
  border: 1px solid rgba(201, 168, 76, 0.3);
}

.badge-specimen {
  background: rgba(93, 197, 220, 0.1);
  color: var(--color-cyan);
  border: 1px solid rgba(93, 197, 220, 0.25);
}

/* ─── Registration Form ──────────────────────────────────── */
.form-section {
  max-width: 480px;
  margin: 0 auto;
}

.form-group {
  margin-bottom: var(--space-lg);
}

.form-label {
  display: block;
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
  margin-bottom: var(--space-sm);
}

.form-input {
  width: 100%;
  padding: 0.875rem 1rem;
  font-family: var(--font-body);
  font-size: 1rem;
  color: var(--color-text);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  transition: border-color var(--duration-fast);
  outline: none;
}

.form-input:focus {
  border-color: var(--color-gold);
  box-shadow: 0 0 0 3px rgba(201, 168, 76, 0.15);
}

.form-input::placeholder {
  color: var(--color-text-dim);
}

.form-input-serial {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  text-align: center;
  letter-spacing: 0.2em;
}

.form-hint {
  font-size: 0.8125rem;
  color: var(--color-text-dim);
  margin-top: var(--space-xs);
}

.form-error {
  font-size: 0.8125rem;
  color: var(--color-error);
  margin-top: var(--space-xs);
  display: none;
}

.form-error.visible {
  display: block;
}

/* ─── Counters (Realtime) ────────────────────────────────── */
.counter-bar {
  display: flex;
  justify-content: center;
  gap: var(--space-2xl);
  padding: var(--space-lg) 0;
}

.counter-item {
  text-align: center;
}

.counter-value {
  font-family: var(--font-mono);
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 700;
  color: var(--color-gold);
  line-height: 1;
}

.counter-label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
  margin-top: var(--space-xs);
}

/* ─── Founder Badge ──────────────────────────────────────── */
.founder-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  background: linear-gradient(135deg, rgba(201, 168, 76, 0.15), rgba(201, 168, 76, 0.05));
  border: 1px solid var(--color-gold-dim);
  border-radius: var(--border-radius);
}

.founder-badge::before {
  content: '◆';
  color: var(--color-gold);
}

.founder-badge-text {
  font-family: var(--font-body);
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-gold);
}

/* ─── Navigation ─────────────────────────────────────────── */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: var(--space-md) var(--space-lg);
  background: rgba(13, 13, 15, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: all var(--duration-base);
}

.nav.scrolled {
  border-bottom-color: var(--color-border);
}

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

.nav-logo {
  height: 28px;
  opacity: 0.9;
}

.nav-links {
  display: flex;
  gap: var(--space-xl);
  list-style: none;
}

.nav-link {
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--duration-fast);
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-gold);
}

/* Mobile nav */
@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(13, 13, 15, 0.97);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-2xl);
    z-index: 200;
  }

  .nav-links.mobile-open {
    display: flex;
  }

  .nav-links .nav-link {
    font-size: 1.25rem;
    letter-spacing: 0.12em;
  }

  .nav-hamburger {
    display: block;
    width: 28px;
    height: 20px;
    cursor: pointer;
    position: relative;
    z-index: 300;
    -webkit-tap-highlight-color: transparent;
  }

  .nav-hamburger span {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--color-text-muted);
    position: absolute;
    left: 0;
    transition: all var(--duration-fast);
  }

  .nav-hamburger span:nth-child(1) { top: 0; }
  .nav-hamburger span:nth-child(2) { top: 9px; }
  .nav-hamburger span:nth-child(3) { top: 18px; }

  .nav-hamburger.open span:nth-child(1) {
    transform: rotate(45deg);
    top: 9px;
  }
  .nav-hamburger.open span:nth-child(2) {
    opacity: 0;
  }
  .nav-hamburger.open span:nth-child(3) {
    transform: rotate(-45deg);
    top: 9px;
  }

  /* Bigger touch targets on mobile */
  .btn {
    padding: 1rem 2rem;
    min-height: 48px;
  }

  .form-input {
    padding: 1rem;
    font-size: 1.0625rem;
    min-height: 48px;
  }

  .rgpd-container input[type="checkbox"] {
    width: 22px;
    height: 22px;
  }

  /* Hero adjustments */
  .hero {
    padding: var(--space-xl) var(--space-md);
    min-height: 90vh;
  }

  .hero-cta {
    flex-direction: column;
    align-items: stretch;
  }

  .hero-cta .btn {
    width: 100%;
  }
}

@media (min-width: 769px) {
  .nav-hamburger {
    display: none;
  }
}

/* ─── Footer ─────────────────────────────────────────────── */
.footer {
  padding: var(--space-2xl) var(--space-lg);
  border-top: 1px solid var(--color-border);
  text-align: center;
}

.footer-text {
  font-size: 0.8125rem;
  color: var(--color-text-dim);
}

.footer-brand {
  font-family: var(--font-display);
  font-style: italic;
  color: var(--color-gold-dim);
}

/* ─── Animations ─────────────────────────────────────────── */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes pulseGold {
  0%, 100% { box-shadow: 0 0 0 0 rgba(201, 168, 76, 0.4); }
  50% { box-shadow: 0 0 0 8px rgba(201, 168, 76, 0); }
}

/* Scroll-triggered animations (via IntersectionObserver) */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity var(--duration-slow) var(--ease-out),
              transform var(--duration-slow) var(--ease-out);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ─── Utilities ──────────────────────────────────────────── */
.text-gold { color: var(--color-gold); }
.text-cyan { color: var(--color-cyan); }
.text-muted { color: var(--color-text-muted); }
.text-center { text-align: center; }
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }

/* ─── Success State (post-registration) ──────────────────── */
.success-card {
  background: var(--color-surface);
  border: 1px solid var(--color-gold-dim);
  border-radius: var(--border-radius);
  padding: var(--space-2xl);
  text-align: center;
  animation: fadeIn var(--duration-slow) var(--ease-out);
}

.success-serial {
  font-family: var(--font-mono);
  font-size: 2.5rem;
  letter-spacing: 0.2em;
  color: var(--color-gold);
  margin: var(--space-lg) 0;
}

.success-check {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(76, 175, 80, 0.15);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-md);
}

.success-check::after {
  content: '✓';
  font-size: 1.5rem;
  color: var(--color-success);
}

/* ─── Responsive ─────────────────────────────────────────── */
@media (max-width: 480px) {
  .card-grid {
    grid-template-columns: 1fr;
  }

  .counter-bar {
    gap: var(--space-lg);
  }

  .section {
    padding: var(--space-2xl) 0;
  }
}