/* -------------------------------------------------------------------------- */
/* Palette et variables — « Nuit sous les mers » (d'après l'affiche 2026)       */
/* -------------------------------------------------------------------------- */

:root {
  /* Fonds : du ciel nocturne aux abysses */
  --abyss: #050d17;
  --night: #081726;
  --deep: #0d2032;
  --tide: #16283b;

  /* Lignes de courant et accents argentés */
  --current: #3a5068;
  --steel: #7e98b3;
  --silver: #c4d3e2;
  --pearl: #eef3f8;
  --glow: #9fc3e6;

  /* Triplets RGB pour les transparences : rgba(var(--silver-rgb), .2) */
  --abyss-rgb: 5, 13, 23;
  --night-rgb: 8, 23, 38;
  --deep-rgb: 13, 32, 50;
  --tide-rgb: 22, 40, 59;
  --silver-rgb: 196, 211, 226;
  --pearl-rgb: 238, 243, 248;
  --glow-rgb: 159, 195, 230;

  /* Texte */
  --text: #b6c5d5;
  --text-muted: #8fa4ba;
  --text-strong: var(--pearl);
  --danger: #ff9bb0;

  /* Surfaces et bordures */
  --surface: rgba(var(--tide-rgb), 0.72);
  --surface-strong: rgba(var(--deep-rgb), 0.9);
  --border: rgba(var(--silver-rgb), 0.12);
  --border-strong: rgba(var(--silver-rgb), 0.28);

  /* Boutons nacrés */
  --btn-bg: linear-gradient(135deg, #f4f8fc 0%, #c4d3e2 55%, #9fb6cc 100%);
  --btn-bg-hover: linear-gradient(135deg, #ffffff 0%, #d6e2ee 55%, #afc4d8 100%);
  --btn-text: #061322;

  /* Ombres */
  --shadow-soft: 0 18px 40px rgba(var(--abyss-rgb), 0.45);
  --shadow-card: 0 16px 34px rgba(var(--abyss-rgb), 0.55);
  --shadow-glow: 0 0 22px rgba(var(--glow-rgb), 0.25);

  /* Typographies */
  --font-display: 'Cormorant Garamond', Georgia, 'Times New Roman', serif;
  --font-body: 'Jost', system-ui, -apple-system, 'Segoe UI', sans-serif;

  /* Logo : or d'origine -> blanc argenté (sans modifier le fichier PNG) */
  --logo-filter: grayscale(1) brightness(2.3) contrast(0.95) drop-shadow(0 0 10px rgba(var(--glow-rgb), 0.35));

  /* Fond général : ciel étoilé qui se fond dans l'océan */
  --gradient-ocean: radial-gradient(ellipse 80% 50% at 50% 0%, rgba(var(--glow-rgb), 0.07), transparent 70%),
                    linear-gradient(180deg, #06101c 0%, #071624 35%, #0a1c2d 70%, #061524 100%);

  /* Visibilité des créatures de fond (raies, méduse) */
  --creature-opacity: 0.3;

  --nav-h: 96px;
}

/* -------------------------------------------------------------------------- */
/* Reset minimal et base typographique                                         */
/* -------------------------------------------------------------------------- */

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

html {
  scroll-behavior: smooth;
  background-color: var(--abyss);
}

body {
  font-family: var(--font-body);
  font-weight: 400;
  background: var(--gradient-ocean);
  background-color: var(--night);
  color: var(--text);
  line-height: 1.7;
  font-size: 16px;
  min-height: 100vh;
  padding-top: var(--nav-h);
}

h1, h2, h3, h4, h5 {
  font-family: var(--font-display);
  font-weight: 600;
  color: var(--text-strong);
  line-height: 1.15;
  letter-spacing: 0.01em;
  font-variant-numeric: lining-nums;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

main {
  position: relative;
  z-index: 1;
}

::selection {
  background: rgba(var(--glow-rgb), 0.35);
  color: var(--pearl);
}

/* -------------------------------------------------------------------------- */
/* Décor de fond : étoiles, scintillements et bulles (fixe, derrière tout)     */
/* -------------------------------------------------------------------------- */

.sea-decor {
  position: fixed;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  pointer-events: none;
}

.sea-decor .stars {
  position: absolute;
  inset: 0;
  background-repeat: repeat;
  /* Les étoiles s'estompent vers le bas, comme le ciel de l'affiche qui plonge dans la mer */
  -webkit-mask-image: linear-gradient(180deg, #000 0%, rgba(0, 0, 0, 0.55) 55%, rgba(0, 0, 0, 0.15) 100%);
  mask-image: linear-gradient(180deg, #000 0%, rgba(0, 0, 0, 0.55) 55%, rgba(0, 0, 0, 0.15) 100%);
}

.sea-decor .stars-a {
  background-image: url('assets/decor/stars-a.svg');
  background-size: 480px 480px;
  opacity: 0.4;
}

.sea-decor .stars-b {
  background-image: url('assets/decor/stars-b.svg');
  background-size: 720px 720px;
  background-position: 130px 60px;
  opacity: 0.35;
  animation: twinkle 7s ease-in-out infinite alternate;
}

.sea-decor .sparkle {
  position: absolute;
  left: var(--x);
  top: var(--y);
  width: var(--s, 14px);
  height: var(--s, 14px);
  background: url('assets/decor/sparkle.svg') center / contain no-repeat;
  opacity: 0.5;
  animation: sparkle 5s ease-in-out var(--d, 0s) infinite;
}

.sea-decor .bubble {
  position: absolute;
  bottom: -40px;
  left: var(--x);
  width: var(--s, 8px);
  height: var(--s, 8px);
  border-radius: 50%;
  border: 1px solid rgba(var(--silver-rgb), 0.45);
  background:
    radial-gradient(circle at 32% 28%, rgba(255, 255, 255, 0.7) 0 9%, transparent 15%),
    radial-gradient(circle at 50% 50%, transparent 55%, rgba(var(--glow-rgb), 0.18) 100%);
  box-shadow: inset 0 0 calc(var(--s, 8px) / 4) rgba(var(--glow-rgb), 0.25);
  opacity: 0;
  animation: bubble-rise var(--t, 24s) linear var(--d, 0s) infinite;
}

@keyframes twinkle {
  0%   { opacity: 0.12; }
  100% { opacity: 0.45; }
}

@keyframes sparkle {
  0%, 100% { opacity: 0.2; transform: scale(0.75) rotate(0deg); }
  50%      { opacity: 0.6; transform: scale(1) rotate(12deg); }
}

@keyframes bubble-rise {
  0%   { transform: translate3d(0, 0, 0);                              opacity: 0; }
  10%  { opacity: 0.4; }
  50%  { transform: translate3d(var(--sway, 18px), -55vh, 0); }
  85%  { opacity: 0.3; }
  100% { transform: translate3d(0, -115vh, 0);                         opacity: 0; }
}

/* -------------------------------------------------------------------------- */
/* Layouts de base                                                             */
/* -------------------------------------------------------------------------- */

.container {
  width: min(1100px, 92vw);
  margin-inline: auto;
}

.section {
  padding: clamp(3.5rem, 6vw, 6.5rem) 0;
  position: relative;
}

/* Halo de lumière venant de la surface */
.section::before {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0.6;
  pointer-events: none;
  background-image: radial-gradient(ellipse 60% 45% at 50% 0%, rgba(var(--glow-rgb), 0.06), transparent 70%);
}

.section > * {
  position: relative;
  z-index: 1;
}

/* Sections semi-transparentes : le décor de fond reste visible en filigrane */
.section-velvet {
  background: linear-gradient(180deg, rgba(var(--deep-rgb), 0.55) 0%, rgba(var(--night-rgb), 0.35) 100%);
}

.section-midnight {
  background: linear-gradient(180deg, rgba(var(--night-rgb), 0.3) 0%, rgba(var(--abyss-rgb), 0.35) 100%);
}

.section-ebony {
  background: linear-gradient(180deg, rgba(var(--abyss-rgb), 0.45) 0%, rgba(var(--night-rgb), 0.4) 100%);
}

/* Vague à paillettes en bas de certaines sections (motif de l'affiche) */
.section-velvet::after,
.section-wave::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 120px;
  background: url('assets/decor/wave.svg') center bottom / 1440px 120px repeat-x;
  opacity: 0.35;
  pointer-events: none;
  z-index: 0;
}

/* Créatures constellées (raies manta, méduse) en arrière-plan d'une section */
.has-creatures {
  overflow: hidden;
  overflow: clip; /* coupe les créatures sans casser position: sticky à l'intérieur */
}

.has-creatures > .creature {
  position: absolute;
  z-index: 0;
  background-position: center;
  background-size: contain;
  background-repeat: no-repeat;
  opacity: var(--creature-opacity);
  filter: drop-shadow(0 0 14px rgba(var(--glow-rgb), 0.35));
  pointer-events: none;
}

.manta {
  width: clamp(220px, 32vw, 440px);
  aspect-ratio: 200 / 150;
  background-image: url('assets/decor/manta.svg');
}

.manta-right {
  top: 6%;
  right: -5%;
  transform: rotate(-24deg);
}

.manta-left {
  bottom: 8%;
  left: -6%;
  transform: rotate(28deg) scaleX(-1);
}

.jellyfish {
  width: clamp(110px, 13vw, 180px);
  aspect-ratio: 120 / 220;
  background-image: url('assets/decor/jellyfish.svg');
  top: 50%;
  right: 6%;
  transform: translateY(-50%) rotate(8deg);
  animation: jelly-float 9s ease-in-out infinite;
}

@keyframes jelly-float {
  0%, 100% { translate: 0 0; }
  50%      { translate: 0 -18px; }
}

.section-header {
  text-align: center;
  margin-bottom: clamp(2.5rem, 5vw, 3.75rem);
}

.section-kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.8em;
  letter-spacing: 0.4em;
  text-transform: uppercase;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--silver);
  margin-bottom: 0.8rem;
}

/* Petite étoile à quatre branches de part et d'autre du kicker */
.section-kicker::before,
.section-kicker::after {
  content: "";
  width: 9px;
  height: 9px;
  background: url('assets/decor/sparkle.svg') center / contain no-repeat;
  opacity: 0.8;
}

.section-title {
  font-size: clamp(2.4rem, 4.5vw, 3.4rem);
  margin-bottom: 1rem;
}

.section-subtitle {
  font-size: 1.05rem;
  font-weight: 300;
  color: var(--text-muted);
  max-width: min(620px, 90vw);
  margin-inline: auto;
}

.text-accent {
  color: var(--silver);
}

/* -------------------------------------------------------------------------- */
/* Boutons et CTA                                                              */
/* -------------------------------------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.9rem;
  border-radius: 999px;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  cursor: pointer;
  border: none;
  transition: transform 0.25s ease, box-shadow 0.25s ease, background 0.25s ease, color 0.25s ease;
}

.btn-primary,
.btn-gold {
  background: var(--btn-bg);
  color: var(--btn-text);
  box-shadow: 0 10px 24px rgba(var(--abyss-rgb), 0.5), var(--shadow-glow);
}

.btn-primary:hover,
.btn-gold:hover {
  background: var(--btn-bg-hover);
  transform: translateY(-3px);
  box-shadow: 0 14px 30px rgba(var(--abyss-rgb), 0.55), 0 0 30px rgba(var(--glow-rgb), 0.4);
}

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

.btn-outline:hover {
  background: rgba(var(--silver-rgb), 0.1);
  transform: translateY(-3px);
}

.btn[disabled],
.btn.is-disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.btn-full {
  width: 100%;
}

.btn:focus-visible {
  outline: 2px solid var(--pearl);
  outline-offset: 3px;
}

/* -------------------------------------------------------------------------- */
/* Utilitaires                                                                 */
/* -------------------------------------------------------------------------- */

.hidden {
  display: none !important;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

#nav-sentinel {
  height: 1px;
}

/* -------------------------------------------------------------------------- */
/* Footer                                                                      */
/* -------------------------------------------------------------------------- */

.site-footer {
  position: relative;
  z-index: 1;
  background: linear-gradient(180deg, rgba(var(--abyss-rgb), 0.8) 0%, var(--abyss) 100%);
  border-top: 1px solid var(--border);
  padding: 3.5rem 0 2rem;
  margin-top: 4rem;
}

.site-footer::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 100%;
  height: 120px;
  background: url('assets/decor/wave.svg') center bottom / 1440px 120px repeat-x;
  opacity: 0.4;
  pointer-events: none;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 2.5rem;
}

.footer-column h4 {
  font-size: 1.3rem;
  margin-bottom: 0.85rem;
}

.footer-column p,
.footer-column a,
.footer-column li {
  color: var(--text-muted);
  font-size: 0.95rem;
}

.footer-links {
  list-style: none;
  display: grid;
  gap: 0.55rem;
  padding: 0;
}

.footer-social {
  display: grid;
  gap: 0.55rem;
}

.footer-social a:hover,
.footer-links a:hover {
  color: var(--pearl);
}

.footer-meta {
  margin-top: 2.5rem;
  text-align: center;
  font-size: 0.85rem;
  color: rgba(var(--silver-rgb), 0.5);
}

/* -------------------------------------------------------------------------- */
/* Responsive                                                                  */
/* -------------------------------------------------------------------------- */

@media (max-width: 1024px) {
  body {
    padding-top: calc(var(--nav-h) - 10px);
  }

  .container {
    width: min(92vw, 960px);
  }
}

@media (max-width: 768px) {
  .section {
    padding: 3rem 0;
  }

  .section-header {
    margin-bottom: 2.5rem;
  }

  .footer-grid {
    gap: 2rem;
  }

  .section-velvet::after,
  .section-wave::after,
  .site-footer::before {
    height: 80px;
    background-size: 960px 80px;
  }

  :root {
    --creature-opacity: 0.18;
  }

  .jellyfish {
    top: 1.5rem;
    right: -1.5rem;
    transform: rotate(8deg);
  }

  /* Moins de bulles sur petit écran */
  .sea-decor .bubbles .bubble:nth-child(n + 7) {
    display: none;
  }
}

@media (max-width: 560px) {
  body {
    font-size: 15px;
  }

  .section-title {
    font-size: 2.2rem;
  }

  .section-kicker {
    letter-spacing: 0.3em;
  }

  .footer-grid {
    grid-template-columns: 1fr;
  }
}

/* -------------------------------------------------------------------------- */
/* Accessibilité : pas d'animation si l'utilisateur le demande                 */
/* -------------------------------------------------------------------------- */

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .sea-decor .stars-b,
  .sea-decor .sparkle,
  .jellyfish {
    animation: none;
  }

  .sea-decor .bubble {
    display: none;
  }

  *, *::before, *::after {
    transition-duration: 0.01ms !important;
  }
}