/* ===== Tokens ===== */
:root{
  --bg-top:#fff3f7;
  --bg-mid:#ffd9ea;
  --bg-bottom:#ffc1dd;
  --glass:rgba(255,255,255,0.38);
  --glass-strong:rgba(255,255,255,0.55);
  --glass-border:rgba(255,255,255,0.75);
  --accent-deep:#d6567f;
  --accent-soft:#f7a8c4;
  --accent-softer:#ffd1e3;
  --text-dark:#6b2440;
  --text-mid:#8a3f5c;
  --shadow-pink:rgba(214,86,127,0.28);
  --font-script:'Dancing Script', cursive;
  --font-body:'Quicksand', sans-serif;
}

*{box-sizing:border-box;}
html,body{
  margin:0;
  padding:0;
  width:100%;
  height:100%;
  overflow:hidden;
  font-family:var(--font-body);
  color:var(--text-dark);
  background:linear-gradient(160deg, var(--bg-top) 0%, var(--bg-mid) 55%, var(--bg-bottom) 100%);
}

button{font-family:inherit;cursor:pointer;}

/* ===== Ambient bubbles ===== */
.bubbles{
  position:fixed;
  inset:0;
  overflow:hidden;
  z-index:0;
  pointer-events:none;
}
.bubble{
  position:absolute;
  bottom:-120px;
  border-radius:50%;
  background:radial-gradient(circle at 30% 28%, rgba(255,255,255,0.95), rgba(255,255,255,0.15) 45%, rgba(255,182,213,0.12) 70%);
  border:1px solid rgba(255,255,255,0.55);
  box-shadow:
    inset 0 0 12px rgba(255,255,255,0.6),
    0 8px 20px rgba(214,86,127,0.12);
  backdrop-filter:blur(2px);
  animation-name:floatUp;
  animation-timing-function:ease-in;
  animation-iteration-count:infinite;
  opacity:0.85;
}
@keyframes floatUp{
  0%{ transform:translateY(0) translateX(0) scale(1); opacity:0; }
  8%{ opacity:0.9; }
  50%{ transform:translateY(-55vh) translateX(15px) scale(1.05); }
  100%{ transform:translateY(-115vh) translateX(-10px) scale(0.9); opacity:0; }
}

/* ===== Top controls ===== */
.top-controls{
  position:fixed;
  top:18px;
  right:18px;
  z-index:50;
}
.glass-icon-btn{
  width:44px;height:44px;
  border-radius:50%;
  border:1px solid var(--glass-border);
  background:var(--glass);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  color:var(--accent-deep);
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 6px 18px var(--shadow-pink);
  transition:transform .25s ease, box-shadow .25s ease;
}
.glass-icon-btn:hover{ transform:translateY(-2px) scale(1.05); box-shadow:0 10px 22px var(--shadow-pink); }
.glass-icon-btn:active{ transform:scale(0.94); }
.glass-icon-btn.small{ width:36px;height:36px; }

/* ===== Progress dots ===== */
.progress-dots{
  position:fixed;
  bottom:22px;
  left:50%;
  transform:translateX(-50%);
  display:flex;
  gap:10px;
  z-index:50;
}
.progress-dots .dot{
  width:8px;height:8px;
  border-radius:50%;
  background:rgba(214,86,127,0.28);
  transition:all .35s ease;
}
.progress-dots .dot.active{
  width:26px;
  border-radius:6px;
  background:var(--accent-deep);
  box-shadow:0 2px 8px var(--shadow-pink);
}

/* ===== Slides ===== */
.slides-container{
  position:relative;
  width:100%;
  height:100%;
  z-index:1;
}
.slide{
  position:absolute;
  inset:0;
  display:flex;
  align-items:center;
  justify-content:center;
  padding:24px;
  opacity:0;
  pointer-events:none;
  transform:translateX(60px) scale(0.96);
  transition:opacity .6s cubic-bezier(.22,.9,.32,1), transform .6s cubic-bezier(.22,.9,.32,1);
}
.slide.active{
  opacity:1;
  pointer-events:auto;
  transform:translateX(0) scale(1);
}
.slide.leaving-prev{
  transform:translateX(-60px) scale(0.96);
}

/* ===== Glass card ===== */
.glass-card{
  position:relative;
  width:100%;
  max-width:520px;
  background:var(--glass);
  border:1px solid var(--glass-border);
  border-radius:32px;
  padding:44px 34px 38px;
  backdrop-filter:blur(18px) saturate(140%);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
  box-shadow:
    0 20px 50px var(--shadow-pink),
    inset 0 1px 0 rgba(255,255,255,0.8);
  text-align:center;
  overflow:hidden;
}
.glass-card::before{
  content:'';
  position:absolute;
  top:-40%;
  left:-20%;
  width:70%;
  height:70%;
  background:radial-gradient(circle, rgba(255,255,255,0.55), transparent 70%);
  transform:rotate(20deg);
  pointer-events:none;
}

.eyebrow{
  font-size:12px;
  letter-spacing:3px;
  text-transform:uppercase;
  color:var(--accent-deep);
  font-weight:700;
  margin:0 0 6px;
  opacity:.85;
}
.script-title{
  font-family:var(--font-script);
  font-weight:700;
  font-size:clamp(2.1rem, 6vw, 3rem);
  color:var(--accent-deep);
  margin:0 0 14px;
  line-height:1.15;
  text-shadow:0 2px 12px rgba(214,86,127,0.25);
}
.script-title.small{ font-size:clamp(1.5rem, 4.6vw, 2rem); }
.sub-text{
  font-size:15px;
  color:var(--text-mid);
  margin:0 0 26px;
  line-height:1.6;
  font-weight:500;
}
.tiny-hint{
  font-size:11px;
  color:var(--text-mid);
  opacity:.7;
  margin-top:16px;
}

/* ===== Glass button ===== */
.glass-btn{
  position:relative;
  display:inline-flex;
  align-items:center;
  gap:8px;
  justify-content:center;
  padding:14px 30px;
  border-radius:50px;
  border:1px solid var(--glass-border);
  background:linear-gradient(135deg, rgba(255,255,255,0.55), rgba(255,209,227,0.35));
  color:var(--text-dark);
  font-weight:700;
  font-size:15px;
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  box-shadow:0 10px 24px var(--shadow-pink), inset 0 1px 0 rgba(255,255,255,0.9);
  transition:transform .25s ease, box-shadow .25s ease;
}
.glass-btn:hover{ transform:translateY(-3px); box-shadow:0 16px 30px var(--shadow-pink), inset 0 1px 0 rgba(255,255,255,0.9); }
.glass-btn:active{ transform:translateY(0) scale(0.97); }
.glass-btn svg{ flex-shrink:0; }

.song-buttons{
  display:flex;
  flex-direction:column;
  gap:14px;
  margin:10px 0 6px;
}
.song-btn{ width:100%; }
.song-btn[data-editable-active] { outline:none; }
.song-btn span[data-editable]{
  outline:none;
  min-width:40px;
}
.song-btn.playing{
  background:linear-gradient(135deg, var(--accent-soft), var(--accent-deep));
  color:#fff;
  box-shadow:0 12px 26px var(--shadow-pink);
}
.note-icon{ opacity:.8; }

/* ===== Cake ===== */
.cake-wrap{ margin:14px 0 30px; }
.cake-scene{
  position:relative;
  width:180px;
  height:190px;
  margin:0 auto;
}
.plate{
  position:absolute;
  bottom:0;
  left:50%;
  transform:translateX(-50%);
  width:170px;
  height:16px;
  border-radius:50%;
  background:rgba(255,255,255,0.6);
  box-shadow:0 6px 14px rgba(214,86,127,0.25), inset 0 2px 4px rgba(255,255,255,0.9);
}
.cake-base{
  position:absolute;
  bottom:14px;
  left:50%;
  transform:translateX(-50%);
  width:150px;
  height:46px;
  border-radius:14px;
  background:linear-gradient(180deg, #ffc2dd, #ff9fc3);
  box-shadow:inset 0 -6px 10px rgba(214,86,127,0.25), inset 0 4px 6px rgba(255,255,255,0.5);
}
.cake-mid{
  position:absolute;
  bottom:56px;
  left:50%;
  transform:translateX(-50%);
  width:118px;
  height:40px;
  border-radius:12px;
  background:linear-gradient(180deg, #ffd6e8, #ffb1d1);
  box-shadow:inset 0 -6px 10px rgba(214,86,127,0.2), inset 0 4px 6px rgba(255,255,255,0.6);
}
.cake-dots{
  position:absolute;
  bottom:64px;
  left:50%;
  transform:translateX(-50%);
  width:118px;
  display:flex;
  justify-content:space-evenly;
}
.cake-dots span{
  width:8px;height:8px;
  border-radius:50%;
  background:#fff6fa;
  box-shadow:0 2px 4px rgba(214,86,127,0.3);
}
.cake-top{
  position:absolute;
  bottom:92px;
  left:50%;
  transform:translateX(-50%);
  width:86px;
  height:32px;
  border-radius:10px 10px 30px 30px / 10px 10px 16px 16px;
  background:linear-gradient(180deg, #ffe9f2, #ffc7dd);
  box-shadow:inset 0 -5px 8px rgba(214,86,127,0.18), inset 0 4px 6px rgba(255,255,255,0.7);
}
.cake-drip{
  position:absolute;
  bottom:88px;
  left:50%;
  transform:translateX(-50%);
  width:96px;
  height:14px;
  background:
    radial-gradient(circle at 10% 100%, #fff 3px, transparent 4px),
    radial-gradient(circle at 30% 100%, #fff 4px, transparent 5px),
    radial-gradient(circle at 50% 100%, #fff 3px, transparent 4px),
    radial-gradient(circle at 70% 100%, #fff 4px, transparent 5px),
    radial-gradient(circle at 90% 100%, #fff 3px, transparent 4px);
  opacity:0.9;
}
.candle{
  position:absolute;
  bottom:122px;
  left:50%;
  transform:translateX(-50%);
  width:8px;
  height:26px;
  border-radius:3px;
  background:repeating-linear-gradient(180deg, #fff 0 4px, #ffb8d4 4px 8px);
  box-shadow:0 2px 4px rgba(214,86,127,0.3);
}
.wick{
  position:absolute;
  bottom:146px;
  left:50%;
  transform:translateX(-50%);
  width:2px;
  height:6px;
  background:#6b3b2a;
  border-radius:1px;
}
.candle-flame-wrap{
  position:absolute;
  bottom:150px;
  left:50%;
  transform:translateX(-50%);
  cursor:pointer;
  padding:10px 16px;
  z-index:5;
}
.flame{
  width:12px;
  height:20px;
  border-radius:50% 50% 50% 50% / 60% 60% 40% 40%;
  background:radial-gradient(circle at 50% 70%, #fff6c8 0%, #ffd35c 35%, #ff9d3a 65%, #ff6a3d 100%);
  box-shadow:0 0 14px 4px rgba(255,170,60,0.6);
  transform-origin:bottom center;
  animation:flicker 0.9s ease-in-out infinite alternate;
  transition:opacity .4s ease, transform .4s ease;
}
@keyframes flicker{
  0%{ transform:scaleY(1) rotate(-2deg); }
  50%{ transform:scaleY(1.08) rotate(2deg); }
  100%{ transform:scaleY(0.96) rotate(-1deg); }
}
.candle-flame-wrap.blown .flame{
  opacity:0;
  transform:scaleY(0.2) translateY(6px);
}
.smoke-container{
  position:absolute;
  bottom:172px;
  left:50%;
  transform:translateX(-50%);
  width:2px;height:2px;
  pointer-events:none;
}
.smoke-puff{
  position:absolute;
  bottom:0;left:0;
  width:10px;height:10px;
  border-radius:50%;
  background:rgba(180,180,180,0.5);
  animation:smokeRise 1.6s ease-out forwards;
}
@keyframes smokeRise{
  0%{ opacity:.55; transform:translate(0,0) scale(0.6); }
  100%{ opacity:0; transform:translate(var(--dx,10px),-60px) scale(1.8); }
}
.cake-hint{
  margin-top:12px;
  font-size:13px;
  color:var(--text-mid);
  font-weight:600;
}

/* ===== Envelope ===== */
.envelope-wrap{ margin:10px 0 30px; }
.envelope{
  position:relative;
  width:180px;
  height:118px;
  margin:0 auto 14px;
  cursor:pointer;
}
.envelope-back{
  position:absolute;
  inset:0;
  border-radius:10px;
  background:linear-gradient(160deg, #ffe3ef, #ffc3dd);
  box-shadow:0 14px 26px rgba(214,86,127,0.28);
}
.envelope-letter-peek{
  position:absolute;
  left:10px; right:10px;
  bottom:14px;
  height:70px;
  background:#fffaf9;
  border-radius:6px;
  box-shadow:0 4px 10px rgba(214,86,127,0.15);
  transition:transform .5s cubic-bezier(.2,.8,.3,1.3);
  z-index:1;
}
.envelope-flap{
  position:absolute;
  top:0; left:0; right:0;
  height:0;
  border-left:90px solid transparent;
  border-right:90px solid transparent;
  border-top:64px solid #ffb1d1;
  transform-origin:top center;
  transition:transform .55s cubic-bezier(.3,.8,.4,1.2);
  z-index:2;
  filter:drop-shadow(0 4px 6px rgba(214,86,127,0.2));
}
.envelope-seal{
  position:absolute;
  top:38px;
  left:50%;
  transform:translateX(-50%);
  font-size:22px;
  z-index:3;
  transition:opacity .3s ease;
}
.envelope.opened .envelope-flap{ transform:rotateX(180deg); }
.envelope.opened .envelope-letter-peek{ transform:translateY(-34px); }
.envelope.opened .envelope-seal{ opacity:0; }
.envelope:hover{ filter:brightness(1.03); }

/* ===== Emotes slide 5 ===== */
.emote-row{
  display:flex;
  justify-content:center;
  gap:10px;
  margin-bottom:6px;
  height:44px;
}
.emote{
  font-size:26px;
  display:inline-block;
  animation:bounceFloat 2.4s ease-in-out infinite;
}
.emote.e1{ animation-delay:0s; }
.emote.e2{ animation-delay:.2s; }
.emote.e3{ animation-delay:.4s; }
.emote.e4{ animation-delay:.6s; }
.emote.e5{ animation-delay:.8s; }
@keyframes bounceFloat{
  0%,100%{ transform:translateY(0) rotate(0deg); }
  50%{ transform:translateY(-14px) rotate(6deg); }
}

/* floating emote burst */
.floating-emote{
  position:fixed;
  bottom:-40px;
  font-size:28px;
  z-index:40;
  pointer-events:none;
  animation:emoteUp 3.2s ease-in forwards;
}
@keyframes emoteUp{
  0%{ transform:translateY(0) translateX(0) rotate(0deg); opacity:1; }
  100%{ transform:translateY(-100vh) translateX(var(--dx,0px)) rotate(360deg); opacity:0; }
}

/* ===== Audio control ===== */
.audio-control{
  position:fixed;
  bottom:22px;
  left:18px;
  display:flex;
  align-items:center;
  gap:8px;
  padding:6px 14px 6px 6px;
  border-radius:50px;
  background:var(--glass);
  border:1px solid var(--glass-border);
  backdrop-filter:blur(12px);
  box-shadow:0 8px 18px var(--shadow-pink);
  font-size:12px;
  font-weight:600;
  color:var(--text-mid);
  z-index:50;
  transition:opacity .4s ease, transform .4s ease;
}
.audio-control.hidden{ opacity:0; pointer-events:none; transform:translateY(10px); }

/* ===== Modal (letter) ===== */
.modal{
  position:fixed;
  inset:0;
  z-index:100;
  display:flex;
  align-items:center;
  justify-content:center;
  padding:20px;
  transition:opacity .4s ease;
}
.modal.hidden{ opacity:0; pointer-events:none; }
.modal-overlay{
  position:absolute;
  inset:0;
  background:rgba(107,36,64,0.35);
  backdrop-filter:blur(4px);
}
.letter-paper{
  position:relative;
  max-width:440px;
  width:100%;
  max-height:80vh;
  overflow-y:auto;
  background:#fffaf9;
  border-radius:18px;
  padding:36px 28px 30px;
  box-shadow:0 30px 60px rgba(107,36,64,0.35);
  transform:scale(0.85) translateY(20px);
  transition:transform .45s cubic-bezier(.2,.8,.3,1.2);
  font-family:var(--font-body);
}
.modal:not(.hidden) .letter-paper{ transform:scale(1) translateY(0); }
.letter-heading{
  font-family:var(--font-script);
  font-size:2rem;
  color:var(--accent-deep);
  margin:0 0 14px;
  text-align:center;
}
.letter-body{
  font-size:14.5px;
  line-height:1.75;
  color:var(--text-dark);
  margin:0 0 14px;
  text-align:left;
}
.letter-sign{
  text-align:right;
  font-family:var(--font-script);
  font-size:1.4rem;
  color:var(--accent-deep);
  margin-top:10px;
}
.close-modal{
  position:absolute;
  top:12px; right:14px;
  width:30px;height:30px;
  border-radius:50%;
  border:none;
  background:var(--accent-softer);
  color:var(--accent-deep);
  font-size:18px;
  line-height:1;
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 4px 10px rgba(214,86,127,0.25);
}

/* ===== Responsive ===== */
@media (max-width:480px){
  .glass-card{ padding:34px 22px 28px; border-radius:26px; }
  .cake-scene{ width:150px; height:170px; }
  .envelope{ width:150px; height:100px; }
  .envelope-flap{ border-left-width:75px; border-right-width:75px; border-top-width:54px; }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce){
  .bubble, .flame, .emote, .floating-emote{ animation:none !important; }
  .slide{ transition:opacity .3s ease; }
}