:root{
  --pink-1:#f3d3d6; --pink-2:#e7a9b0; --pink-3:#d98a96;
  --rose:#c0392b; --ink:#6b4a4a; --paper:#fdf6e9;
}
*{box-sizing:border-box;margin:0;padding:0}
html,body,#app{height:100%;width:100%;overflow:hidden}
body{font-family:"Quicksand",system-ui,sans-serif;background:#e7a9b0;color:var(--ink);-webkit-font-smoothing:antialiased;touch-action:none}
#app *{-webkit-touch-callout:none;user-select:none;}
.stage{position:fixed;inset:0;opacity:0;pointer-events:none;transition:opacity 1.1s ease}
.stage.on{opacity:1;pointer-events:auto}

/* ---------- A. phun hoa từ trung tâm ---------- */
#flythrough{background:#fefcf7; overflow:hidden; z-index:2}
.burst-flower{
  position:absolute;left:50%;top:50%;
  opacity:0;pointer-events:none;
  will-change:transform,opacity;
  animation:burstOut 3.6s cubic-bezier(.15,.8,.35,1) forwards;
}
@keyframes burstOut{
  0%  {opacity:0;transform:translate(-50%,-50%) scale(.12) rotate(0deg);}
  10% {opacity:1;}
  72% {opacity:.9;}
  100%{opacity:0;transform:translate(calc(-50% + var(--tx)),calc(-50% + var(--ty))) scale(1) rotate(var(--rot));}
}


/* ---------- C/D. màn hình phong bì ---------- */
#card{background:#fefcf7}
#garland{position:absolute;top:-40px;left:50%;transform:translateX(-50%);
  width:140vw;max-width:1700px;height:120px;
  pointer-events:none;
  filter:drop-shadow(0 18px 24px rgba(120,40,55,.22));
  transition:transform 1.2s ease}
.garland-flower{position:absolute;pointer-events:none;}
.float-rose{position:absolute;width:120px;opacity:.9;pointer-events:none;
  animation:drift 9s ease-in-out infinite;will-change:transform}
@keyframes drift{0%,100%{transform:translateY(0) rotate(0)}50%{transform:translateY(-26px) rotate(8deg)}}
.card-inner{position:relative;height:100%;display:flex;flex-direction:column;
  align-items:center;justify-content:center;gap:14px;text-align:center}
.tap-hdr{position:absolute;top:90px;left:0;right:0;text-align:center;
  font-size:14px;letter-spacing:.34em;color:#9a5f66;text-transform:uppercase}
.namerow{font-size:15px;letter-spacing:.3em;text-transform:uppercase;color:#9a5f66}
.namerow b{font-family:"Cormorant Garamond",serif;font-style:italic;font-weight:500;
  font-size:34px;letter-spacing:.02em;text-transform:none;margin-left:.4em;color:#7a4750}
#env{width:300px;max-width:74vw;cursor:pointer;
  filter:drop-shadow(0 20px 30px rgba(120,40,55,.28));
  animation:bob 5s ease-in-out infinite;transition:transform .5s ease}
#env:hover{transform:scale(1.04)}
#env.opening{animation:envOpen 1s ease forwards}
@keyframes bob{0%,100%{transform:translateY(0)}50%{transform:translateY(-10px)}}
@keyframes envOpen{to{transform:scale(2.4);opacity:0}}
@keyframes envShake{
  0%,100%{transform:rotate(0) scale(1)}
  20%{transform:rotate(-6deg) scale(1.04)}
  50%{transform:rotate(5deg) scale(1.04)}
  80%{transform:rotate(-3deg) scale(1.02)}
}
#env.shake{animation:envShake .38s ease !important}


/* ---------- E. bảng kỷ niệm ---------- */
#book{background:linear-gradient(rgba(255,255,255,.65),rgba(255,255,255,.65)),url(assets/botanical-pattern.jpg) center/cover;cursor:grab}
#book.grab{cursor:grabbing}
#board{position:absolute;left:50%;top:50%;width:0;height:0;will-change:transform}
.bg-ghost{position:absolute;opacity:.16;filter:grayscale(.3);pointer-events:none;
  transform:translate(-50%,-50%)}
.card{position:absolute;transform:translate(-50%,-50%);
  filter:drop-shadow(0 14px 26px rgba(90,40,45,.28));cursor:grab;user-select:none;
  transition:box-shadow .2s;will-change:transform}
.card.drag{cursor:grabbing;z-index:999}
.bouquet-deco{
  position:absolute;
  width:330px;
  left:-260px;top:-50px;
  transform:rotate(-14deg);
  pointer-events:none;}
.card.card-bare{filter:none;overflow:visible;background:none}
.bouquet-float{width:390px;display:block;
  filter:drop-shadow(0 14px 28px rgba(90,40,45,.38));
  -webkit-user-drag:none;user-select:none;pointer-events:none;}
.tape{position:absolute;top:-12px;left:50%;width:78px;height:26px;transform:translateX(-50%) rotate(-3deg);
  background:rgba(255,255,255,.45);border:1px solid rgba(255,255,255,.5)}
.polaroid{background:#fdf8ef;padding:14px 14px 40px;width:230px;border-radius:3px}
.polaroid img{width:100%;display:block;border-radius:2px}
.polaroid .num{position:absolute;bottom:12px;left:16px;font-size:12px;color:#b09a90;letter-spacing:.1em}
.closeb{position:absolute;top:-8px;right:-8px;width:16px;height:16px;border-radius:50%;
  background:#fff;box-shadow:0 1px 5px rgba(0,0,0,.22);
  display:grid;place-items:center;font-size:9px;color:#b05;cursor:pointer;z-index:10;
  opacity:0;pointer-events:none;transition:opacity .2s ease,transform .2s ease;transform:scale(.6)}
#card-spotlight>.card .closeb{opacity:1;pointer-events:auto;transform:scale(1)}
/* thẻ lời nhắn */
.msg{
  background-color:#d5bb97;
  background-image:
    repeating-linear-gradient(transparent 0,transparent 27px,rgba(95,58,12,.38) 27px,rgba(95,58,12,.38) 28px),
    linear-gradient(to right,transparent 31px,rgba(138,52,28,.28) 31px,rgba(138,52,28,.28) 32px,transparent 32px),
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65 0.75' numOctaves='4' stitchTiles='stitch'/%3E%3CfeColorMatrix type='matrix' values='0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.11 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E"),
    radial-gradient(ellipse 130% 80% at 18% 18%,rgba(218,182,118,.55) 0%,transparent 62%),
    radial-gradient(ellipse 110% 120% at 82% 86%,rgba(148,102,44,.45) 0%,transparent 60%);
  background-size:auto,auto,cover,cover,cover;
  background-position:0 26px,0 0,0 0,0 0,0 0;
  width:330px;border-radius:6px;padding:33px 32px 42px 38px;}
.msg-dear,.msg-line{
  font-family:"Cormorant Garamond",serif;font-style:italic;
  font-size:17px;line-height:28px;color:#4a3020;
  margin:0;text-align:left;word-break:break-word;font-weight:420;}
.msg-dear{color:#6b4530;font-weight:630;}
/* --- lật thẻ config --- */
.card.card-flip{filter:none;}
.msg-flip{perspective:1200px;width:330px;}
.msg-flip-inner{
  position:relative;transform-style:preserve-3d;
  transition:transform .7s cubic-bezier(.4,0,.2,1);}
.msg-flip.flipped .msg-flip-inner{transform:rotateY(180deg);}
/* mặt trước: bìa thư "Thư cho bé" */
.msg-cover{
  position:absolute;inset:0;
  backface-visibility:hidden;-webkit-backface-visibility:hidden;
  background:#e8d9c5;border-radius:6px;
  box-shadow:0 14px 26px rgba(90,40,45,.28);
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;
  pointer-events:auto;}
.msg-cover-text{
  font-family:"Dancing Script",cursive;font-size:38px;font-weight:600;
  color:#6b4530;text-align:center;line-height:1.4;margin:0;pointer-events:none;}
.msg-flip.flipped .msg-cover{pointer-events:none;}
/* mặt sau: nội dung thư (lật ra) */
.msg.msg-letter{
  transform:rotateY(180deg);
  backface-visibility:hidden;-webkit-backface-visibility:hidden;
  box-shadow:0 14px 26px rgba(90,40,45,.28);
  pointer-events:none;}
.msg-flip.flipped .msg.msg-letter{pointer-events:auto;}
/* nút lật góc */
.msg-flip-btn{
  position:absolute;bottom:14px;right:14px;
  width:28px;height:28px;border-radius:50%;
  border:1.5px solid rgba(107,69,48,.32);
  background:rgba(107,69,48,.11);font-size:14px;color:#6b4530;
  cursor:pointer;display:grid;place-items:center;}
.msg-flip-btn-back{bottom:auto;top:10px;right:10px;}
/* board blur overlay */
#board-blur{
  display:none;position:fixed;inset:0;z-index:200;
  backdrop-filter:blur(16px) saturate(1.12);
  background:rgba(28,8,12,.3);}
#board-blur.show{display:block}
/* spotlight: card được focus nổi trên blur */
#card-spotlight{position:fixed;inset:0;z-index:210;pointer-events:none}
#card-spotlight>.card{pointer-events:auto}
/* thẻ cào */
.scratch{width:240px;background:#fdf8ef;padding:14px 14px 40px;border-radius:3px}
.scratch .num{position:absolute;bottom:12px;left:16px;font-size:12px;color:#b09a90}
.scratch-wrap{position:relative;width:212px;height:268px;border-radius:2px;overflow:hidden}
.scratch-wrap img{width:100%;height:100%;object-fit:cover;display:block}
.scratch-wrap canvas{position:absolute;inset:0;touch-action:none}
/* thẻ media (YouTube / Spotify) */
.media{width:300px;border-radius:14px;overflow:hidden;background:#fdf8ef;color:var(--ink);
  font-family:"Quicksand",sans-serif}
.yt .bar{display:flex;align-items:center;gap:10px;padding:10px 12px;font-size:12px;color:#9a6068}
.yt .screen{height:150px;background:#e8c4c8 center/cover;display:grid;place-items:center;position:relative}
.yt .screen iframe{width:100%;height:100%;border:0}
.playb{width:54px;height:54px;border-radius:50%;background:rgba(255,255,255,.85);
  display:grid;place-items:center;cursor:pointer}
.playb::after{content:"";border-left:16px solid #b05060;border-top:10px solid transparent;
  border-bottom:10px solid transparent;margin-left:4px}
.yt .foot{display:flex;justify-content:space-between;align-items:center;padding:8px 12px;font-size:11px;color:#b09098}
.sc-card{width:280px;border-radius:14px;background:#fdf8ef;color:var(--ink);padding:12px;
  display:flex;gap:12px;align-items:center;font-family:"Quicksand",sans-serif;overflow:hidden}
.sc-card iframe{width:100%;height:80px;border:0;border-radius:10px}
.sc-icon{width:46px;height:46px;border-radius:8px;flex:0 0 auto;
  background:linear-gradient(135deg,#d98a96,#c0687a);display:grid;place-items:center}
.sc-icon::after{content:"☁";font-size:22px;color:#fff}
.sc-meta{flex:1;min-width:0}
.sc-title{font-weight:600;font-size:13px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.sc-sub{font-size:11px;color:#b07880;margin-top:2px}
.sc-play{width:36px;height:36px;border-radius:50%;background:#d98a96;display:grid;
  place-items:center;cursor:pointer;flex:0 0 auto}
.sc-play::after{content:"";border-left:12px solid #fff;border-top:7px solid transparent;
  border-bottom:7px solid transparent;margin-left:3px}
.spotify{width:260px;border-radius:14px;background:#121212;color:#fff;padding:12px;display:flex;gap:12px;align-items:center}
.spotify .art{width:54px;height:54px;border-radius:6px;background:linear-gradient(135deg,#e98aa6,#7a4750);flex:0 0 auto}
.spotify .meta{flex:1;min-width:0}
.spotify .t{font-weight:600;font-size:14px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.spotify .a{font-size:12px;color:#9a9a9a}
.spotify .sp{width:34px;height:34px;border-radius:50%;background:#1db954;display:grid;place-items:center;cursor:pointer}
.spotify .sp::after{content:"";border-left:11px solid #000;border-top:7px solid transparent;border-bottom:7px solid transparent;margin-left:3px}
/* bản đồ kỷ niệm */
.memmap{width:360px;background:#fdf8ef;border-radius:14px;padding:14px}
.memmap .mh{font-size:11px;letter-spacing:.22em;color:#b58;text-transform:uppercase}
.memmap h3{font-family:"Cormorant Garamond",serif;font-size:24px;color:#5a4a4a;margin:-2px 0 10px}
.memmap .map{position:relative;height:230px;border-radius:10px;overflow:hidden}
.memmap .lmap{position:absolute;inset:0;border-radius:10px;overflow:hidden;}
.memmap .pin{position:absolute;left:50%;top:52%;transform:translate(-50%,-50%);
  width:48px;height:48px;border-radius:50%;border:3px solid #fff;background:#ccc center/cover;
  box-shadow:0 4px 10px rgba(0,0,0,.4)}
.memmap .pin::after{content:"";position:absolute;left:50%;bottom:-9px;transform:translateX(-50%);
  border-top:10px solid #fff;border-left:7px solid transparent;border-right:7px solid transparent}
.memmap .zoom{position:absolute;top:50px;right:24px;display:flex;flex-direction:column;gap:8px}
.memmap .zoom button{width:34px;height:34px;border:0;border-radius:50%;cursor:pointer;
  font-size:18px;color:#fff}
.zin{background:#3aa76d}.zout{background:#d98a96}
.hint-tap{position:fixed;bottom:20px;left:50%;transform:translateX(-50%);
  font-family:"Cormorant Garamond",serif;font-style:italic;color:#fff;font-size:18px;
  text-shadow:0 2px 10px rgba(120,40,55,.5);opacity:.9;pointer-events:none}
/* ---------- nút & popup Happy Birthday ---------- */
.cycle-btn{position:absolute;bottom:22px;width:46px;height:46px;border-radius:50%;border:none;
  background:rgba(253,248,239,.88);box-shadow:0 3px 14px rgba(120,40,55,.22);
  font-size:26px;line-height:1;cursor:pointer;color:#9a5f66;z-index:50;
  display:grid;place-items:center;transition:transform .15s,opacity .15s;opacity:.85}
.cycle-btn:active{transform:scale(.88)}
#cycle-left{left:22px}
#cycle-right{right:80px}
#open-popup{position:fixed;bottom:22px;right:22px;z-index:50;
  width:52px;height:52px;border-radius:50%;border:none;
  background:#fdf8ef;box-shadow:0 4px 16px rgba(120,40,55,.25);
  font-size:24px;cursor:pointer;transition:transform .2s}
#open-popup:active{transform:scale(.9)}
#hb-popup{display:none;position:fixed;inset:0;z-index:500;
  background:rgba(90,40,45,.5);place-items:center}
#hb-frame-wrap{position:relative;width:92vw;max-width:480px;height:85vh;
  border-radius:18px;overflow:hidden;box-shadow:0 20px 60px rgba(90,40,45,.4)}
#hb-frame{width:100%;height:100%;border:0;display:block}
#close-popup{position:absolute;top:10px;right:10px;z-index:10;
  width:32px;height:32px;border-radius:50%;border:none;
  background:rgba(255,255,255,.85);font-size:14px;cursor:pointer;
  box-shadow:0 2px 8px rgba(0,0,0,.2)}
/* ---------- lightbox phóng to ảnh (long-press + f/2.8 blur) ---------- */
#photo-lightbox{
  display:none;position:fixed;inset:0;z-index:600;place-items:center;
  backdrop-filter:blur(14px) saturate(1.15);
  background:radial-gradient(ellipse at center,rgba(60,25,30,.38) 0%,rgba(35,8,12,.72) 100%);
}
#photo-lightbox.open{display:grid;animation:lbFadeIn .28s ease}
#lightbox-panel{
  display:flex;position:relative;overflow:visible;
  border-radius:10px;
  box-shadow:0 28px 72px rgba(50,15,20,.65),0 0 0 1px rgba(255,255,255,.07);
  animation:lbScale .3s cubic-bezier(.34,1.46,.64,1);
  max-height:82vh;
}
#lightbox-gif{
  position:absolute;top:-36px;right:-36px;
  width:88px;height:88px;object-fit:contain;
  pointer-events:none;z-index:20;
  filter:drop-shadow(0 4px 10px rgba(0,0,0,.35));
}
#lightbox-photo-side{
  flex:0 0 auto;background:#100508;display:flex;align-items:center;
  border-radius:10px 0 0 10px;overflow:hidden;
}
#lightbox-img{display:block;max-width:260px;max-height:72vh;object-fit:contain}
#lightbox-note-side{
  position:relative;width:320px;min-height:200px;background:#d0b38b;
  display:flex;flex-direction:column;
  border-radius:0 10px 10px 0;overflow:hidden;
}
#lightbox-close{
  position:absolute;top:8px;right:8px;z-index:10;
  width:28px;height:28px;border-radius:50%;border:none;
  background:rgba(140,80,60,.14);font-size:13px;color:#7a5040;cursor:pointer;
}
#lightbox-note-body{
  flex:1;padding:37px 16px 16px 34px;overflow-y:auto;
  background-color:#d0b38b;
  background-image:
    repeating-linear-gradient(transparent 0,transparent 27px,rgba(95,58,12,.38) 27px,rgba(95,58,12,.38) 28px),
    linear-gradient(to right,transparent 31px,rgba(138,52,28,.28) 31px,rgba(138,52,28,.28) 32px,transparent 32px),
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65 0.75' numOctaves='4' stitchTiles='stitch'/%3E%3CfeColorMatrix type='matrix' values='0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.11 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E"),
    radial-gradient(ellipse 130% 80% at 18% 18%,rgba(218,182,118,.4) 0%,transparent 62%),
    radial-gradient(ellipse 110% 120% at 82% 86%,rgba(148,102,44,.35) 0%,transparent 60%);
  background-size:auto,auto,cover,cover,cover;
  background-attachment:local;
  background-position:0 32px,0 0,0 0,0 0,0 0;
}
#lightbox-note-text{
  font-family:"Cormorant Garamond",serif;font-style:italic;
  font-size:22px;line-height:28px;color:#4a3020;
  font-weight:420;white-space:pre-line;word-break:break-word;
}
@keyframes lbFadeIn{from{opacity:0}to{opacity:1}}
@keyframes lbScale{from{transform:scale(.75)}to{transform:scale(1)}}
@keyframes hapticZoom{from{transform:scale(.32);opacity:0}to{transform:scale(1);opacity:1}}
/* ---------- deck: card zoom overlay ---------- */
#card-zoom{
  display:none;position:fixed;inset:0;z-index:700;place-items:center;
  backdrop-filter:blur(18px) saturate(1.15);
  background:radial-gradient(ellipse at center,rgba(40,15,20,.35) 0%,rgba(20,5,10,.65) 100%);
}
#card-zoom.open{display:grid;animation:lbFadeIn .22s ease}
#card-zoom-frame{
  animation:hapticZoom .46s cubic-bezier(.34,1.56,.64,1);
  display:flex;align-items:center;justify-content:center;
  max-width:90vw;max-height:88vh;overflow:visible;
}
.zoom-photo-wrap{display:flex;flex-direction:column;align-items:center;gap:18px}
#card-zoom-frame img,.zoom-photo-wrap img{
  max-width:82vw;max-height:74vh;object-fit:contain;display:block;
  border-radius:8px;box-shadow:0 24px 64px rgba(0,0,0,.55);
}
.zoom-note{
  font-family:"Cormorant Garamond",serif;font-style:italic;
  font-size:22px;color:rgba(248,235,220,.92);text-align:center;
  text-shadow:0 2px 10px rgba(0,0,0,.45);margin:0;
}
#card-zoom-close{
  position:fixed;top:14px;right:14px;z-index:10;
  width:34px;height:34px;border-radius:50%;border:none;
  background:rgba(255,255,255,.2);font-size:15px;color:#fff;cursor:pointer;
}
@media(max-width:600px){
  #lightbox-panel{flex-direction:column;max-width:90vw}
  #lightbox-img{max-width:88vw;max-height:44vh}
  #lightbox-note-side{width:100%;min-height:160px}
}

@media (prefers-reduced-motion:reduce){
  #env,.float-rose,.burst-flower{animation:none!important}
  #flythrough{display:none}
}