/* Bố cục: một "đêm hoa nở" – nụ hoa giữa màn hình, nở ra thành thiệp; thẻ cào giấu món quà */
:root{
  --night:#1F0D1C;      /* nền đêm tím mận */
  --plum:#3A1733;       /* lớp nền sáng hơn */
  --rose:#F28BA8;       /* cánh hoa */
  --blush:#FBD3DE;      /* hồng nhạt */
  --gold:#E9C46A;       /* vàng ánh kim */
  --cream:#FFF4EC;      /* giấy thư */
  --ink:#3B1A2E;        /* chữ trên giấy */
  --muted:#C9A9BC;      /* chữ phụ trên nền tối */
  --f-display:'Cormorant Garamond',Georgia,'Times New Roman',serif;
  --f-script:'Great Vibes','Brush Script MT',cursive;
  --f-body:'Be Vietnam Pro',system-ui,-apple-system,'Segoe UI',sans-serif;
  color-scheme:dark;
}
*{box-sizing:border-box}
html,body{overflow-x:hidden;margin:0;background:var(--night);color:var(--blush)}
body{font-family:var(--f-body);-webkit-font-smoothing:antialiased}
[hidden]{display:none!important}

#sky,#fx{position:fixed;inset:0;width:100%;height:100%;pointer-events:none;z-index:0}
#fx{z-index:6}

.wrap{position:relative;z-index:1;overflow:hidden;max-width:440px;margin:0 auto;min-height:100vh;min-height:100svh;
  padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px));
  background:radial-gradient(120% 60% at 50% 0%,var(--plum) 0%,transparent 70%)}

/* ---------- màn 1: nụ hoa ---------- */
.intro{min-height:100vh;min-height:100svh;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:22px;padding-block:40px;text-align:center}
.eyebrow{font-size:12px;font-weight:600;letter-spacing:.22em;text-transform:uppercase;color:var(--gold)}
.intro h1{margin:0;font-family:var(--f-display);font-style:italic;font-weight:600;font-size:34px;line-height:1.15;color:var(--cream);text-wrap:balance}
.bud-btn{appearance:none;border:0;background:none;padding:0;cursor:pointer;border-radius:50%;-webkit-tap-highlight-color:transparent}
.bud-btn:focus-visible{outline:3px solid var(--gold);outline-offset:6px}
.bud{display:block;width:240px;height:270px;max-width:100%;animation:sway 3.6s ease-in-out infinite;transform-origin:50% 100%}
@keyframes sway{0%,100%{transform:rotate(-2deg)}50%{transform:rotate(2deg)}}
.petal{transform-box:view-box;transform-origin:120px 172px;transform:rotate(var(--c)) scale(.9);transition:transform 1.1s cubic-bezier(.2,.9,.25,1.15)}
.petal.in{transition-delay:.12s}
.core{transform-box:view-box;transform-origin:120px 120px;transform:scale(0);transition:transform .6s cubic-bezier(.3,1.6,.5,1) .55s}
.glow{opacity:.35;transition:opacity .8s ease .4s}
.blooming .bud{animation:none}
.blooming .petal{transform:rotate(var(--a)) scale(1)}
.blooming .core{transform:scale(1)}
.face{transform-box:view-box;transform-origin:120px 120px;transform:scale(0);transition:transform .7s cubic-bezier(.3,1.5,.5,1) .75s}
.blooming .face{transform:scale(1)}
.blooming .glow{opacity:1}
.hint{display:flex;align-items:center;gap:8px;font-size:15px;font-weight:500;color:var(--blush);animation:breathe 1.8s ease-in-out infinite}
@keyframes breathe{0%,100%{opacity:1}50%{opacity:.45}}
.blooming .hint{animation:none;opacity:0;transition:opacity .2s}
.intro.leaving{animation:leave .6s ease forwards}
@keyframes leave{to{opacity:0;transform:scale(1.06)}}

/* ---------- màn 2: thiệp ---------- */
.card{display:flex;flex-direction:column;gap:44px;padding-block:52px 40px}
.rise{animation:rise .9s cubic-bezier(.2,.8,.2,1) backwards}
.r2{animation-delay:.15s}.r3{animation-delay:.3s}.r4{animation-delay:.45s}
@keyframes rise{from{opacity:0;transform:translateY(22px)}to{opacity:1;transform:none}}

.hero{display:flex;flex-direction:column;align-items:center;text-align:center;gap:6px}
.date{font-family:var(--f-display);font-style:italic;font-weight:700;font-size:112px;line-height:.9;color:var(--gold);letter-spacing:-.02em;
  background:linear-gradient(180deg,#F6DE9A 0%,var(--gold) 55%,#B98A2E 100%);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.date .dot{-webkit-text-fill-color:var(--rose)}
.hero h2{margin:8px 0 0;font-family:var(--f-display);font-weight:600;font-size:30px;line-height:1.2;color:var(--cream);text-wrap:balance}
.hero .script{font-family:var(--f-script);font-size:34px;color:var(--rose);line-height:1.3}

.letter{background:var(--cream);color:var(--ink);border-radius:6px 26px 6px 26px;padding:30px 24px 26px;display:flex;flex-direction:column;gap:14px;
  box-shadow:0 30px 60px -30px rgba(0,0,0,.6),0 0 0 1px rgba(233,196,106,.35)}
.letter .hi{font-family:var(--f-script);font-size:36px;line-height:1.1;color:#B03A62}
.letter p{margin:0;font-size:16px;line-height:1.75}
.wishes{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin:4px 0 2px;padding:0;list-style:none}
.wishes li{display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:14px;background:#FCE6EC;font-size:14px;font-weight:600;color:#7A2649;min-width:0}
.wishes svg{flex:none}
.sign{display:flex;flex-direction:column;align-items:flex-end;gap:0;padding-top:6px}
.sign .name{font-family:var(--f-script);font-size:34px;line-height:1.1;color:var(--ink)}
.sign .role{font-size:13px;color:#7B5A6B}

/* thẻ cào */
.gift{display:flex;flex-direction:column;align-items:center;text-align:center;gap:16px}
.gift h3{margin:0;font-family:var(--f-display);font-weight:600;font-size:28px;line-height:1.2;color:var(--cream);text-wrap:balance}
.gift .sub{margin:0;font-size:15px;line-height:1.6;color:var(--muted);max-width:320px}
.ticket{position:relative;width:100%;max-width:340px;aspect-ratio:17/10;border-radius:18px;overflow:hidden;
  background:var(--cream);box-shadow:0 0 0 1.5px var(--gold),0 24px 50px -24px rgba(233,196,106,.45)}
.prize{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;padding:16px;color:var(--ink)}
.prize .k{font-size:11px;font-weight:700;letter-spacing:.2em;text-transform:uppercase;color:#B03A62}
.prize .big{font-family:var(--f-display);font-weight:700;font-size:40px;line-height:1.05}
.prize .small{font-size:14px;color:#7B5A6B}
.ticket::before,.ticket::after{content:"";position:absolute;top:50%;width:22px;height:22px;margin-top:-11px;border-radius:50%;background:var(--night);z-index:3}
.ticket::before{left:-11px}.ticket::after{right:-11px}
#scratch{position:absolute;inset:0;width:100%;height:100%;z-index:2;touch-action:none;cursor:grab;transition:opacity .6s ease}
#scratch.gone{opacity:0;pointer-events:none}
.skip{appearance:none;border:0;background:none;font:inherit;font-size:13px;color:var(--muted);text-decoration:underline;text-underline-offset:3px;cursor:pointer;padding:6px}
.skip:focus-visible{outline:2px solid var(--gold);outline-offset:2px;border-radius:4px}

/* nút nhận quà */
.claim{display:flex;flex-direction:column;align-items:center;gap:14px;text-align:center}
.cta{position:relative;display:flex;align-items:center;justify-content:center;width:100%;min-height:62px;padding:16px 22px;border-radius:999px;
  background:linear-gradient(180deg,#F6DE9A,var(--gold));color:#3B1A2E;font-size:17px;font-weight:700;text-decoration:none;
  box-shadow:0 14px 30px -12px rgba(233,196,106,.7);-webkit-tap-highlight-color:transparent;transition:transform .15s ease}
.cta:active{transform:scale(.97)}
.cta:focus-visible{outline:3px solid var(--rose);outline-offset:4px}
.cta::after{content:"";position:absolute;inset:0;border-radius:999px;border:2px solid var(--gold);animation:ring 2s ease-out infinite;pointer-events:none}
@keyframes ring{0%{opacity:.8;transform:scale(1)}100%{opacity:0;transform:scale(1.1,1.4)}}
.cta.waiting{filter:saturate(.6) brightness(.92)}
.note{font-size:14px;line-height:1.55;color:var(--muted)}
.note strong{color:var(--cream)}
.warn{font-size:13px;color:var(--rose)}

/* ---------- màn 0: người nhận nhập tên + phòng ban ---------- */
.maker{min-height:100vh;min-height:100svh;display:flex;flex-direction:column;justify-content:center;gap:20px;padding-block:44px 40px}
.maker h1{margin:0;font-family:var(--f-display);font-style:italic;font-weight:600;font-size:34px;line-height:1.15;color:var(--cream);text-wrap:balance}
.maker .lead{margin:0;font-size:15px;line-height:1.6;color:var(--muted)}
.maker.leaving{animation:leave .5s ease forwards}
@media (min-width:600px){.maker{min-height:calc(100vh - 48px);min-height:calc(100svh - 48px)}}
.form{display:flex;flex-direction:column;gap:14px;background:var(--plum);border-radius:18px;padding:20px 18px;box-shadow:0 0 0 1px rgba(233,196,106,.25)}
.field{display:flex;flex-direction:column;gap:6px}
.field label{font-size:13px;font-weight:600;color:var(--cream)}
.field .label{font-size:13px;font-weight:600;color:var(--cream)}
.picker{display:flex;flex-direction:column;gap:14px}
.picker-msg{font-size:14px;color:var(--muted);padding:6px 0}
.grp{display:flex;flex-direction:column;gap:8px}
.grp-name{font-size:11px;font-weight:600;letter-spacing:.16em;text-transform:uppercase;color:var(--gold)}
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chip{appearance:none;-webkit-appearance:none;font:inherit;font-size:15px;font-weight:500;line-height:1.2;min-height:44px;padding:10px 16px;border-radius:999px;cursor:pointer;
  border:1px solid rgba(233,196,106,.35);background:var(--night);color:var(--cream);display:inline-flex;align-items:center;gap:6px;
  -webkit-tap-highlight-color:transparent;transition:background-color .15s ease,color .15s ease,transform .15s ease}
.chip:active{transform:scale(.96)}
.chip:focus-visible{outline:2px solid var(--rose);outline-offset:2px}
.chip[aria-checked="true"]{background:linear-gradient(180deg,#F6DE9A,var(--gold));border-color:var(--gold);color:#3B1A2E;font-weight:700}
.chip[aria-checked="true"]::before{content:"✓"}
@media (hover:hover){.chip:hover{border-color:var(--gold)}}
.portrait{display:block;align-self:center;width:108px;height:108px;margin-top:-84px;border-radius:50%;object-fit:cover;background:var(--blush);
  box-shadow:0 0 0 4px var(--cream),0 0 0 6px var(--gold),0 16px 30px -12px rgba(0,0,0,.5)}
.field .help{font-size:12px;color:var(--muted)}
.btn{appearance:none;border:0;font:inherit;font-weight:700;font-size:15px;padding:13px 18px;border-radius:999px;cursor:pointer;background:linear-gradient(180deg,#F6DE9A,var(--gold));color:#3B1A2E}
.btn:focus-visible{outline:3px solid var(--rose);outline-offset:3px}
.err{font-size:13px;color:var(--rose)}

footer{padding-block:0 32px;text-align:center;font-size:11px;letter-spacing:.18em;text-transform:uppercase;color:var(--muted)}

@media (min-width:600px){.wrap{margin-block:24px;min-height:calc(100vh - 48px);min-height:calc(100svh - 48px);border-radius:28px;box-shadow:0 0 0 1px rgba(233,196,106,.15)}
  .intro{min-height:calc(100vh - 48px);min-height:calc(100svh - 48px)}}
/* ---------- lấp lánh ---------- */
.date{background:linear-gradient(110deg,#B98A2E 0%,var(--gold) 30%,#FFF6D6 45%,var(--gold) 60%,#B98A2E 100%);background-size:260% 100%;
  -webkit-background-clip:text;background-clip:text;animation:shimmer 4.5s ease-in-out infinite}
@keyframes shimmer{0%{background-position:100% 0}60%,100%{background-position:0 0}}
.cta-text{position:relative;z-index:1}
.shine{position:absolute;inset:0;border-radius:inherit;overflow:hidden;pointer-events:none}
.shine::before{content:"";position:absolute;top:0;bottom:0;left:0;width:45%;background:linear-gradient(100deg,transparent,rgba(255,255,255,.75),transparent);
  transform:translateX(-120%) skewX(-18deg);animation:sweep 3.2s ease-in-out infinite}
@keyframes sweep{0%,55%{transform:translateX(-120%) skewX(-18deg)}100%{transform:translateX(320%) skewX(-18deg)}}
.portrait{animation:halo 2.6s ease-in-out infinite}
@keyframes halo{0%,100%{box-shadow:0 0 0 4px var(--cream),0 0 0 6px var(--gold),0 0 0 rgba(233,196,106,0)}50%{box-shadow:0 0 0 4px var(--cream),0 0 0 6px var(--gold),0 0 26px rgba(246,222,154,.8)}}

/* ---------- hiệu ứng khi di chuột (chỉ máy có chuột) ---------- */
@media (hover:hover){
  .chip:hover{transform:translateY(-2px);box-shadow:0 8px 18px -8px rgba(233,196,106,.55)}
  .btn,.cta,.mini,.skip,.music,.wishes li,.portrait,.letter,.ticket{transition:transform .25s cubic-bezier(.2,.8,.2,1),box-shadow .25s ease,filter .25s ease,color .2s ease}
  .btn:hover{transform:translateY(-2px);box-shadow:0 12px 26px -10px rgba(233,196,106,.75)}
  .cta:hover{transform:translateY(-3px) scale(1.02);box-shadow:0 20px 40px -14px rgba(233,196,106,.9)}
  .bud-btn:hover .bud{filter:drop-shadow(0 0 18px rgba(246,222,154,.55))}
  .letter:hover{transform:translateY(-4px) rotate(-.4deg)}
  .wishes li:hover{transform:translateY(-3px) rotate(-1.5deg);box-shadow:0 8px 16px -8px rgba(176,58,98,.5)}
  .wishes li:nth-child(even):hover{transform:translateY(-3px) rotate(1.5deg)}
  .portrait:hover{transform:scale(1.06) rotate(-4deg)}
  .ticket:hover{transform:translateY(-3px);box-shadow:0 0 0 1.5px var(--gold),0 30px 60px -24px rgba(233,196,106,.7)}
  .skip:hover{color:var(--cream)}
  .music:hover{transform:scale(1.08)}
  #scratch{cursor:crosshair}
}

/* iOS cũ chưa có aspect-ratio */
@supports not (aspect-ratio:1/1){.ticket{height:0;padding-bottom:58.8%}}

/* nút bật/tắt nhạc */
.music{position:fixed;z-index:5;right:calc(14px + env(safe-area-inset-right,0px));bottom:calc(14px + env(safe-area-inset-bottom,0px));
  width:46px;height:46px;border-radius:50%;border:1px solid rgba(233,196,106,.5);background:rgba(58,23,51,.85);color:var(--gold);
  display:flex;align-items:center;justify-content:center;cursor:pointer;-webkit-tap-highlight-color:transparent;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px)}
.music:focus-visible{outline:2px solid var(--rose);outline-offset:3px}
.music .off{display:none}
.music[aria-pressed="false"] .on{display:none}
.music[aria-pressed="false"] .off{display:block}
.music[aria-pressed="true"] .on{animation:spinNote 3s ease-in-out infinite}
@keyframes spinNote{0%,100%{transform:rotate(-8deg)}50%{transform:rotate(8deg)}}

@media (prefers-reduced-motion:reduce){
  .music .on{animation:none!important}
  .date,.shine::before,.portrait{animation:none}
  .bud,.hint,.cta::after{animation:none}
  .rise{animation:none}
  .petal,.core,.glow,#scratch{transition-duration:.01s;transition-delay:0s}
}