/* ===== Variables ===== */
:root {
  --yellow:    #ECB751;
  --cream:     #f7e6d4;
  --blush:     #E99B8F;
  --sage:      #C0C99C;
  --coral:     #CA685D;
  --olive:     #3B5726;


  --font-serif: 'Cormorant Garamond', Georgia, serif;
  --font-sans:  'Montserrat', sans-serif;

  --envelope-w: 520px;
  --envelope-h: 340px;
  --letter-h:   680px;
}

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

body {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: repeating-linear-gradient(
    90deg,
    #fff 0px,
    #fff 20px,
    var(--sage) 20px,
    var(--sage) 40px
  );
  font-family: var(--font-sans);
  overflow: hidden;
}

/* ===== Scene ===== */
.scene {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
}

/* ===== Envelope wrapper (gère le clipping de la lettre) ===== */
.envelope-wrapper {
  position: relative;
  width: var(--envelope-w);
  height: var(--envelope-h);
  overflow: hidden; /* cache la partie de la lettre hors de l'enveloppe */
  cursor: pointer;
}

/* Dès que la lettre émerge, on libère le clip */
.envelope-wrapper.overflow-visible {
  overflow: visible;
}

/* ===== Enveloppe ===== */
.envelope {
  position: absolute;
  inset: 0;
  transition: transform 0.3s ease;
}

.envelope-wrapper:not(.opened):hover .envelope {
  transform: translateY(-6px) scale(1.01);
}

/* Back face */
.envelope-back {
  position: absolute;
  inset: 0;
  background: var(--yellow);
  border-radius: 4px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.18), 0 4px 12px rgba(0,0,0,0.10);
  z-index: 1;
}

/* Left flap */
.envelope-left {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 0;
  border-style: solid;
  border-width: var(--envelope-h) calc(var(--envelope-w) / 2) 0 0;
  border-color: transparent #f0c767 transparent transparent;
  z-index: 10;
}

/* Right flap */
.envelope-right {
  position: absolute;
  bottom: 0;
  right: 0;
  width: 0;
  height: 0;
  border-style: solid;
  border-width: var(--envelope-h) 0 0 calc(var(--envelope-w) / 2);
  border-color: transparent transparent transparent #f7d897;
  z-index: 10;
}

/* ===== Top flap ===== */
.envelope-flap {
  position: absolute;
  top: 0;
  left: 0;
  width: var(--envelope-w);
  height: calc(var(--envelope-h) * 0.52);
  transform-origin: top center;
  z-index: 20;
}

.flap-inner {
  position: absolute;
  inset: 0;
  clip-path: polygon(0 0, 100% 0, 50% 100%);
  background: var(--yellow);
}

/* Liseré du rabat : triangle légèrement plus grand derrière */
.envelope-flap::before {
  content: '';
  position: absolute;
  inset: -2px;
  clip-path: polygon(0 0, 100% 0, 50% 100%);
  background: rgba(0,0,0,0.2);
  z-index: -1;
  transition: opacity 0.3s ease;
}

.envelope-wrapper.opened .envelope-flap::before {
  opacity: 0;
}

.envelope-wrapper.opened .envelope-flap {
  animation: flapOpen 1.1s ease-in-out forwards;
  z-index: 3;
}

/* scaleY : 1 → 0 (rabat vu de côté) → -1 (rabat retourné, pointe vers le haut) */
@keyframes flapOpen {
  0%   { transform: scaleY(1); }
  35%  { transform: scaleY(0.15); }
  50%  { transform: scaleY(0); }
  65%  { transform: scaleY(-0.2); }
  85%  { transform: scaleY(-1.04); }
  100% { transform: scaleY(-1); }
}

/* ===== Wax seal ===== */
.wax-seal {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 54px;
  height: 54px;
  border-radius: 50%;
  background: radial-gradient(circle at 38% 36%, var(--olive), var(--olive));
  box-shadow: 0 2px 8px rgba(0,0,0,0.22), inset 0 1px 3px rgba(255,255,255,0.15);
  position: absolute;
  bottom: -27px;
  left: 50%;
  transform: translateX(-50%);
  transition: transform 0.3s ease, opacity 0.5s ease;
}

.wax-initials {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 14px;
  color: rgba(255,255,255,0.92);
  letter-spacing: 1px;
  user-select: none;
}

.envelope-wrapper.opened .wax-seal {
  opacity: 0;
  transform: scale(0.6);
}

/* ===== Overlay ===== */
.overlay {
  position: fixed;
  inset: 0;
  background: rgba(247, 237, 226, 0.82);
  backdrop-filter: blur(3px);
  -webkit-backdrop-filter: blur(3px);
  z-index: 50;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.6s ease 0.8s;
}

.envelope-wrapper.opened ~ .overlay,
body.letter-open .overlay {
  opacity: 1;
  pointer-events: auto;
}

/* ===== Lettre ===== */
.letter {
  position: absolute;
  left: 20px;
  right: 20px;
  top: calc(var(--envelope-h) - var(--letter-h) + 20px);
  height: var(--letter-h);
  background: #fff;
  border-radius: 3px 3px 2px 2px;
  z-index: 0;
  box-shadow: 0 -2px 10px rgba(0,0,0,0.08);
  /* transition entièrement gérée par JS (transition inline) */
  overflow: hidden;
}

/* z-index piloté par JS en phase 2 : passe à 100 pour être devant tout */

.letter-inner {
  padding: 36px 40px 30px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  height: 100%;
  opacity: 0;
  /* déclenchée par JS */
  transition: opacity 0.7s ease;
}

/* ===== Letter decorations ===== */
.letter-decoration {
  width: 100%;
  height: 6px;
  background: repeating-linear-gradient(
    90deg,
    var(--sage) 0px,
    var(--sage) 6px,
    transparent 6px,
    transparent 12px
  );
  opacity: 0.35;
  border-radius: 3px;
}

/* ===== Letter typography ===== */
.letter-pre {
  font-family: var(--font-sans);
  font-weight: 300;
  font-size: clamp(11px, 3.5vw, 18px);
  letter-spacing: clamp(2px, 1vw, 5px);
  text-transform: uppercase;
  color: var(--olive);
  margin-top: 4px;
  text-align: center;
  width: 100%;
}

.letter-names {
  font-family: var(--font-serif);
  font-weight: 700;
  font-style: italic;
  font-size: 80px;
  color: var(--blush);
  line-height: 1.1;
  text-align: center;
  display: flex;
  align-items: center;
  gap: 12px;
}

.ampersand {
  font-size: 52px;
  color: var(--coral);
  font-style: italic;
  line-height: 1;
}

/* ===== Divider ===== */
.divider {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 80%;
}

.divider-line {
  flex: 1;
  height: 1px;
  background: var(--sage);
  opacity: 0.4;
}

.divider-diamond {
  font-size: 7px;
  color: var(--sage);
  opacity: 0.6;
}

/* ===== Date & lieu ===== */
.letter-date {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 300;
  color: #5a3e3a;
  letter-spacing: 1px;
}

.letter-time {
  font-family: var(--font-sans);
  font-size: 11px;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--sage);
  margin-top: -6px;
}

.letter-venue-name {
  font-family: var(--font-serif);
  font-size: 18px;
  font-style: italic;
  color: #5a3e3a;
}

.letter-venue-address {
  font-family: var(--font-sans);
  font-size: 10px;
  letter-spacing: 1px;
  color: #9b7b76;
  margin-top: -6px;
}

.letter-message {
  font-family: var(--font-serif);
  font-size: 13px;
  font-style: italic;
  color: #9b7b76;
  text-align: center;
  line-height: 1.7;
  max-width: 360px;
}

.letter-spacer {
  flex: 1;
}

.letter-gap {
  height: 8px;
}

.letter-intro {
  font-family: var(--font-serif);
  font-size: 20px;
  color: #5a3e3a;
  text-align: center;
  line-height: 1.6;
  max-width: 500px;
}

.letter-section-title {
  font-family: var(--font-sans);
  font-weight: 400;
  font-size: 13px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--sage);
  margin-top: 4px;
}

.letter-programme {
  list-style: none;
  font-family: var(--font-serif);
  font-size: 15px;
  color: #5a3e3a;
  line-height: 1.7;
  text-align: left;
  max-width: 400px;
  width: 100%;
}

.letter-programme li {
  padding-left: 16px;
  position: relative;
}

.letter-programme li::before {
  content: '◆';
  position: absolute;
  left: 0;
  font-size: 6px;
  top: 0.55em;
  color: var(--coral);
}

.letter-programme strong {
  font-weight: 400;
  color: var(--coral);
}

.letter-note {
  font-family: var(--font-serif);
  font-size: clamp(10px, 2.8vw, 14px);
  font-style: italic;
  color: #9b7b76;
  text-align: center;
  white-space: nowrap;
}

.letter-ps {
  font-family: var(--font-serif);
  font-size: 12px;
  color: #9b7b76;
  text-align: center;
  line-height: 1.7;
  max-width: 380px;
}

.letter-ps strong {
  color: #5a3e3a;
  font-weight: 400;
}

.letter-rsvp {
  font-family: var(--font-sans);
  font-size: 10px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--sage);
}

.letter-rsvp-email a {
  font-family: var(--font-sans);
  font-size: 11px;
  color: var(--coral);
  text-decoration: none;
  letter-spacing: 0.5px;
  margin-top: -6px;
}

.letter-rsvp-email a:hover {
  text-decoration: underline;
}

/* ===== Hint text ===== */
.hint {
  font-family: var(--font-sans);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--blush);
  transition: opacity 0.5s ease;
  animation: pulse 2.5s ease-in-out infinite;
}

.hint.hidden {
  opacity: 0;
  pointer-events: none;
}

@keyframes pulse {
  0%, 100% { opacity: 0.5; }
  50%       { opacity: 0.9; }
}

/* ===== Responsive ===== */
@media (max-width: 580px) {
  :root {
    --envelope-w: 320px;
    --envelope-h: 210px;
    --letter-h:   580px;
  }

  .letter-names { font-size: 44px; }
  .ampersand    { font-size: 36px; }

  .letter-inner {
    padding: 24px 22px 20px;
    gap: 6px;
  }

  /* letter-pre uses clamp(), no override needed */
  .letter-intro   { font-size: 13px; }
  .letter-section-title { font-size: 11px; }
  .letter-programme { font-size: 13px; }
  /* letter-note uses clamp(), no override needed */
  .letter-ps      { font-size: 10px; }
  .letter-date    { font-size: 17px; }
  .letter-message { font-size: 11px; }

  .hint {
    font-size: 14px;
    letter-spacing: 2px;
  }
}