/* ==========================================================================
   POUR TOI — Feuille de style
   Palette : nuit profonde (#150e17 → #2b1522), rose poudré (#e7aec0),
             rouge très discret (#c85c73), lueur dorée (#e3c39a), crème (#f7efe9)
   Typo     : Cormorant Garamond (display / émotion) + Jost (interface / corps)
   ========================================================================== */

:root {
  --bg-deep:     #130c16;
  --bg-mid:      #2a1522;
  --bg-soft:     #3a1f2c;
  --rose:        #e7aec0;
  --rose-soft:   #f2c9d6;
  --red-quiet:   #c85c73;
  --gold:        #e3c39a;
  --cream:       #f7efe9;
  --glass:       rgba(255, 255, 255, 0.06);
  --glass-brd:   rgba(255, 255, 255, 0.14);

  --font-display: 'Cormorant Garamond', Georgia, serif;
  --font-body:    'Jost', 'Segoe UI', sans-serif;

  --ease-soft: cubic-bezier(.22, 1, .36, 1);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  overflow-x: hidden;
  background: var(--bg-deep);
}

body {
  min-height: 100svh;
  font-family: var(--font-body);
  color: var(--cream);
  background:
    radial-gradient(circle at 50% 15%, var(--bg-soft) 0%, transparent 55%),
    radial-gradient(circle at 80% 80%, rgba(200, 92, 115, .12) 0%, transparent 45%),
    linear-gradient(180deg, var(--bg-deep) 0%, var(--bg-mid) 100%);
  position: relative;
}

/* Empêche tout défilement horizontal sur mobile */
main, section, .container, .container-fluid { max-width: 100vw; }

/* ==========================================================================
   Cœurs flottants (générés en JS)
   ========================================================================== */
#heartsLayer {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 2;
  overflow: hidden;
}

.floating-heart {
  position: absolute;
  bottom: -10svh;
  color: var(--rose);
  opacity: 0;
  animation: floatingHeart linear forwards;
  filter: drop-shadow(0 0 6px rgba(231, 174, 192, .5));
}

@keyframes floatingHeart {
  0%   { transform: translateY(0) translateX(0) scale(.7); opacity: 0; }
  10%  { opacity: .8; }
  90%  { opacity: .5; }
  100% { transform: translateY(-115svh) translateX(var(--drift, 20px)) scale(1); opacity: 0; }
}

/* ==========================================================================
   Structure générale des "scènes"
   ========================================================================== */
main { position: relative; z-index: 3; }

.scene {
  min-height: 100svh;
  width: 100%;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 6svh 1rem;
}

.scene--active {
  display: flex;
  animation: sceneIn .9s var(--ease-soft) both;
}

@keyframes sceneIn {
  from { opacity: 0; transform: translateY(14px); }
  to   { opacity: 1; transform: translateY(0); }
}

.scene-inner { width: 100%; max-width: 640px; }

/* Apparitions séquencées (au chargement de l'écran d'accueil uniquement) */
.fade-in-up {
  opacity: 0;
  transform: translateY(16px);
  animation: fadeInUp .9s var(--ease-soft) forwards;
}
.fade-in-up[data-delay="1"] { animation-delay: .15s; }
.fade-in-up[data-delay="2"] { animation-delay: .55s; }
.fade-in-up[data-delay="3"] { animation-delay: .9s; }
.fade-in-up[data-delay="4"] { animation-delay: 1.5s; }
.fade-in-up[data-delay="5"] { animation-delay: 1.8s; }

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

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

/* ==========================================================================
   Étape 1 — Accueil
   ========================================================================== */
.intro-text {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 500;
  font-size: clamp(1.5rem, 5.5vw, 2.2rem);
  color: var(--rose-soft);
  margin-bottom: .25rem;
  text-shadow: 0 0 24px rgba(231, 174, 192, .25);
}

.intro-heart {
  color: var(--red-quiet);
  font-size: 1.1rem;
  margin-bottom: 2rem;
  animation: softGlow 2.6s ease-in-out infinite, fadeInUp .9s var(--ease-soft) forwards;
  animation-delay: .55s, .55s;
}

@keyframes softGlow {
  0%, 100% { opacity: .55; text-shadow: 0 0 6px rgba(200, 92, 115, .3); }
  50%      { opacity: 1;   text-shadow: 0 0 18px rgba(200, 92, 115, .7); }
}

.intro-sub {
  margin-top: 1.1rem;
  font-size: .85rem;
  letter-spacing: .02em;
  color: rgba(247, 239, 233, .6);
}

/* Enveloppe */
.envelope-wrap { margin-bottom: 1.6rem; }

.envelope {
  position: relative;
  width: min(64vw, 230px);
  aspect-ratio: 3 / 2;
  margin: 0 auto;
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
  perspective: 800px;
}

.envelope__back,
.envelope__body {
  position: absolute;
  inset: 0;
  border-radius: 10px;
  background: linear-gradient(155deg, #b23a56, #7e2740);
  box-shadow: 0 18px 40px rgba(0, 0, 0, .45), 0 0 30px rgba(200, 92, 115, .18);
}

.envelope__body {
  clip-path: polygon(0 22%, 50% 58%, 100% 22%, 100% 100%, 0 100%);
  background: linear-gradient(160deg, #c8425f, #8a2c46);
  z-index: 2;
}

.envelope__flap {
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 58%;
  background: linear-gradient(160deg, #d75f79, #9c3350);
  clip-path: polygon(0 0, 100% 0, 50% 90%);
  transform-origin: top center;
  transform: rotateX(0deg);
  transition: transform .9s var(--ease-soft);
  z-index: 3;
  border-radius: 10px 10px 0 0;
}

.envelope__heart {
  position: absolute;
  top: 52%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 4;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--cream);
  color: var(--red-quiet);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: .95rem;
  box-shadow: 0 4px 14px rgba(0, 0, 0, .35);
  transition: transform .4s var(--ease-soft);
}

.envelope:hover .envelope__heart,
.envelope:focus-visible .envelope__heart { transform: translate(-50%, -50%) scale(1.12); }

.envelope:active { transform: scale(.97); }

/* Bouton principal */
.btn-love {
  background: linear-gradient(135deg, var(--red-quiet), #a83f58);
  color: var(--cream);
  border: none;
  border-radius: 999px;
  padding: .85rem 2.1rem;
  font-family: var(--font-body);
  font-size: 1rem;
  letter-spacing: .01em;
  box-shadow: 0 10px 26px rgba(200, 92, 115, .35);
  transition: transform .3s var(--ease-soft), box-shadow .3s var(--ease-soft);
  min-height: 48px;
}

.btn-love:hover,
.btn-love:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 14px 32px rgba(200, 92, 115, .5);
  color: var(--cream);
}

.btn-love:active { transform: translateY(0) scale(.98); }

/* ==========================================================================
   Étape 2 — Ouverture de la lettre (scène de transition)
   ========================================================================== */
#letter .scene-inner { position: relative; }

.letter-glow {
  position: absolute;
  top: 50%; left: 50%;
  width: 340px; height: 340px;
  transform: translate(-50%, -50%);
  background: radial-gradient(circle, rgba(227, 195, 154, .35), transparent 70%);
  filter: blur(6px);
  animation: fadeIn 1.2s ease forwards;
  z-index: -1;
}

.letter-paper {
  position: relative;
  margin: 0 auto;
  width: min(78vw, 320px);
  padding: 2.4rem 1.4rem;
  background: linear-gradient(160deg, #fbf3e7, #efe1cd);
  color: #4a2e2e;
  border-radius: 4px;
  box-shadow: 0 24px 60px rgba(0, 0, 0, .5);
  transform: translateY(40px) scale(.85) rotate(-2deg);
  opacity: 0;
  animation: letterAppear 1.4s var(--ease-soft) forwards;
  animation-delay: .3s;
}

@keyframes letterAppear {
  0%   { opacity: 0; transform: translateY(60px) scale(.8) rotate(-3deg); }
  60%  { opacity: 1; }
  100% { opacity: 1; transform: translateY(0) scale(1) rotate(0deg); }
}

.letter-paper__text {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 1.4rem;
  text-align: center;
  margin: 0;
}

.letter-paper__heart {
  display: block;
  text-align: center;
  margin-top: .8rem;
  color: var(--red-quiet);
}

/* ==========================================================================
   Étape 3 — Photo (polaroid)
   ========================================================================== */
.polaroid {
  opacity: 0;
  transform: translateY(30px) scale(.94);
  animation: photoReveal 1.1s var(--ease-soft) forwards;
  animation-delay: .3s;
}

@keyframes photoReveal {
  from { opacity: 0; transform: translateY(30px) scale(.94); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

.polaroid__frame {
  position: relative;
  background: var(--cream);
  padding: .7rem .7rem 3.2rem;
  border-radius: 6px;
  box-shadow: 0 24px 50px rgba(0, 0, 0, .5), 0 0 46px rgba(231, 174, 192, .2);
}

.polaroid__frame img {
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  border-radius: 2px;
  display: block;
}

.polaroid__placeholder {
  width: 100%;
  aspect-ratio: 4 / 5;
  border-radius: 2px;
  background: repeating-linear-gradient(135deg, #e7dcd2, #e7dcd2 10px, #ded1c4 10px, #ded1c4 20px);
  color: #8a6b5a;
  display: flex;
  flex-direction: column;
  gap: .5rem;
  align-items: center;
  justify-content: center;
  font-size: .8rem;
  text-align: center;
  padding: 1rem;
}

.polaroid__placeholder i { font-size: 1.8rem; }

.polaroid__caption {
  position: absolute;
  bottom: .6rem;
  left: 0; right: 0;
  text-align: center;
  font-family: var(--font-display);
  font-style: italic;
  color: #4a2e2e;
  font-size: 1.25rem;
  margin: 0;
}

.polaroid--final { width: min(70vw, 260px); }
.polaroid__frame--final { padding: .6rem .6rem 1rem; }

/* ==========================================================================
   Étape 4 — Message
   ========================================================================== */
.message-title {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 500;
  font-size: clamp(1.8rem, 6vw, 2.6rem);
  color: var(--rose-soft);
  margin-bottom: 2rem;
}

.message-text {
  font-size: clamp(1.05rem, 3.6vw, 1.25rem);
  line-height: 1.85;
  color: rgba(247, 239, 233, .92);
  white-space: pre-wrap;
  min-height: 8em;
  margin-bottom: 0;
}

.typed-cursor {
  color: var(--rose);
  animation: blinkCursor .9s steps(1) infinite;
}

.typed-cursor.hidden { display: none; }

@keyframes blinkCursor {
  50% { opacity: 0; }
}

.feature-line {
  width: 56px;
  height: 1px;
  margin: 0 auto;
  background: linear-gradient(90deg, transparent, var(--rose), transparent);
}

.key-phrase {
  font-family: var(--font-display);
  font-style: italic;
  font-size: clamp(1.3rem, 4.6vw, 1.8rem);
  line-height: 1.5;
  color: var(--cream);
  opacity: 0;
  max-width: 30ch;
  margin: 0 auto;
}

.key-phrase.show {
  animation: fadeInUp 1.1s var(--ease-soft) forwards;
}

/* ==========================================================================
   Étape 5 — Souvenirs
   ========================================================================== */
.memories-title {
  font-family: var(--font-display);
  font-style: italic;
  font-size: clamp(1.8rem, 6vw, 2.4rem);
  color: var(--rose-soft);
  margin-bottom: .5rem;
}

.memories-sub {
  font-size: .95rem;
  color: rgba(247, 239, 233, .65);
  margin-bottom: 2.4rem;
}

.memory-cards { --stagger: 0; }

.memory-card {
  background: var(--glass);
  border: 1px solid var(--glass-brd);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-radius: 16px;
  padding: 1.6rem 1rem;
  text-align: center;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .7rem;
  font-size: .92rem;
  color: var(--cream);
  transition: transform .35s var(--ease-soft), background .35s var(--ease-soft), border-color .35s var(--ease-soft);
  opacity: 0;
  transform: translateY(18px);
}

.memory-card.reveal {
  animation: fadeInUp .8s var(--ease-soft) forwards;
}

.memory-card i {
  font-size: 1.5rem;
  color: var(--rose);
}

.memory-card:hover,
.memory-card:focus-visible,
.memory-card.tapped {
  transform: translateY(-4px) scale(1.03);
  background: rgba(231, 174, 192, .12);
  border-color: rgba(231, 174, 192, .4);
}

/* ==========================================================================
   Étape 6 — Section finale
   ========================================================================== */
#final .scene-inner { position: relative; }

.final-line {
  font-size: clamp(1.05rem, 3.8vw, 1.3rem);
  color: rgba(247, 239, 233, .9);
  opacity: 0;
  margin: 1.3rem 0 0;
}

.final-line.show { animation: fadeInUp 1s var(--ease-soft) forwards; }

.final-love {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 600;
  font-size: clamp(2.6rem, 11vw, 4.2rem);
  color: var(--rose-soft);
  margin: 2rem 0 0;
  opacity: 0;
  transform: scale(.8);
}

.final-love.show {
  animation: finalReveal 2.6s var(--ease-soft) forwards;
}

@keyframes finalReveal {
  0%   { opacity: 0; transform: scale(.8); text-shadow: none; }
  55%  { opacity: 1; transform: scale(1.06); }
  100% { opacity: 1; transform: scale(1); text-shadow: 0 0 34px rgba(231, 174, 192, .6); }
}

/* ==========================================================================
   Bouton musique
   ========================================================================== */
.music-btn {
  position: fixed;
  top: max(14px, env(safe-area-inset-top));
  right: 14px;
  z-index: 20;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  border: 1px solid var(--glass-brd);
  background: rgba(19, 12, 22, .55);
  backdrop-filter: blur(8px);
  color: rgba(247, 239, 233, .75);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  transition: color .3s ease, border-color .3s ease, transform .3s ease;
}

.music-btn.playing {
  color: var(--rose-soft);
  border-color: rgba(231, 174, 192, .5);
  animation: softGlow 2.4s ease-in-out infinite;
}

.music-btn:active { transform: scale(.92); }

/* ==========================================================================
   Responsive — ajustements fins
   ========================================================================== */
@media (max-width: 380px) {
  .envelope { width: 72vw; }
  .btn-love { padding: .75rem 1.7rem; font-size: .92rem; }
}

@media (min-width: 768px) {
  .scene { padding: 8svh 2rem; }
  .memories-title, .message-title { margin-bottom: 2.5rem; }
}

/* ==========================================================================
   Accessibilité — mouvement réduit
   ========================================================================== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
    scroll-behavior: auto !important;
  }
  .floating-heart { display: none; }
}