*{box-sizing:border-box}
:root{
  --bg:#070916;--bg2:#11142b;--text:#fff7fb;--muted:#c9bfd0;
  --pink:#ff7fb2;--pink2:#ffb7d5;--purple:#a985ff;--glass:rgba(255,255,255,.08);
  --border:rgba(255,255,255,.14);--shadow:0 24px 70px rgba(0,0,0,.32)
}
html{scroll-behavior:smooth}
body{
  margin:0;font-family:"Be Vietnam Pro",system-ui,sans-serif;color:var(--text);
  background:
    radial-gradient(circle at 10% 20%,rgba(255,127,178,.12),transparent 30%),
    radial-gradient(circle at 90% 30%,rgba(169,133,255,.13),transparent 28%),
    linear-gradient(180deg,var(--bg),var(--bg2) 48%,#080a18);
  min-height:100vh;overflow:hidden
}
body.locked,body.modal-open{overflow:hidden}
#stars{position:fixed;inset:0;z-index:-3;width:100%;height:100%}
#floating-hearts{position:fixed;inset:0;pointer-events:none;z-index:30;overflow:hidden}
.floating-heart{
  position:absolute;bottom:-40px;font-size:18px;animation:floatUp linear forwards;
  filter:drop-shadow(0 4px 10px rgba(255,100,160,.25))
}
@keyframes floatUp{to{transform:translateY(-115vh) rotate(360deg);opacity:0}}
.pointer-glow{position:fixed;left:-110px;top:-110px;width:220px;height:220px;border-radius:50%;z-index:-2;pointer-events:none;background:radial-gradient(circle,rgba(255,127,178,.13),transparent 68%);will-change:transform}
.portrait-cursor{display:none}
@media (pointer:fine){
  html,body,button,a,.memory-card,.muse-frame,#secretHeart,.envelope{cursor:none!important}
  .portrait-cursor{display:block;position:fixed;left:0;top:0;width:64px;height:58px;z-index:9999;pointer-events:none;opacity:0;will-change:transform;filter:drop-shadow(0 5px 9px rgba(255,80,145,.5));transition:opacity .18s ease}
  .portrait-cursor.visible{opacity:1}
  .portrait-cursor img{width:100%;height:100%;object-fit:cover;object-position:50% 34%;clip-path:path("M32 56C25 48 3 35 3 17C3 6 11 1 20 2C27 2 31 7 32 12C34 7 38 2 45 2C55 1 62 7 61 18C60 35 39 48 32 56Z");transform:scale(1);transition:transform .16s cubic-bezier(.2,.8,.2,1);background:#f3d2dc}
  .portrait-cursor.clicking img{transform:scale(.78)}
}
.love-progress{display:none}
.love-progress span{position:absolute;inset:0;background:linear-gradient(var(--pink2),var(--purple));transform:scaleY(0);transform-origin:top;box-shadow:0 0 12px var(--pink);border-radius:inherit}
.love-progress b{position:absolute;left:50%;top:-7px;transform:translateX(-50%);color:var(--pink);font-size:14px;text-shadow:0 0 12px var(--pink)}
.tap-heart{position:fixed;z-index:180;pointer-events:none;color:var(--pink);font-size:20px;transform:translate(-50%,-50%);animation:tapHeart .9s ease-out forwards}
@keyframes tapHeart{to{opacity:0;transform:translate(-50%,-90px) scale(1.8) rotate(18deg)}}

.screen,.section{min-height:100vh;padding:90px 20px;display:flex;align-items:center;justify-content:center}
main{position:fixed;inset:0;overflow:hidden}
.intro-screen{position:fixed;inset:0;z-index:100;background:linear-gradient(160deg,#070916,#15102a);transition:.9s ease}
.intro-screen.hide{opacity:0;visibility:hidden;transform:scale(1.04)}
.intro-card{max-width:680px;text-align:center;padding:44px 30px}
.glass{
  background:var(--glass);border:1px solid var(--border);backdrop-filter:blur(18px);
  -webkit-backdrop-filter:blur(18px);border-radius:30px;box-shadow:var(--shadow)
}
.eyebrow{text-transform:uppercase;letter-spacing:.2em;font-size:.74rem;color:var(--pink2);font-weight:700}
h1,h2,h3,p{margin-top:0}
h1{font-size:clamp(2.1rem,7vw,4.5rem);margin-bottom:16px}
h2{font-size:clamp(2rem,5vw,4rem);line-height:1.1;margin-bottom:22px}
.intro-copy,.typing-text,.distance-card p,.final-card p,.letter-card{color:var(--muted);line-height:1.9}
.tiny{font-size:.78rem;color:#aaa0b2;margin:16px 0 0}
.primary-btn{
  border:0;border-radius:999px;padding:15px 24px;font:inherit;font-weight:700;color:#18101b;
  background:linear-gradient(135deg,#ffd0e3,#ff82b7);box-shadow:0 12px 35px rgba(255,127,178,.28);
  cursor:pointer;transition:.25s ease
}
.primary-btn:hover{transform:translateY(-3px) scale(1.02)}
.primary-btn:active{transform:scale(.98)}

.gift-wrap{width:150px;height:140px;position:relative;margin:0 auto 28px;animation:bob 2s ease-in-out infinite}
.gift-box{position:absolute;width:130px;height:95px;left:10px;bottom:0;background:linear-gradient(135deg,#ff77ae,#ff4f92);border-radius:8px}
.gift-lid{position:absolute;z-index:4;width:146px;height:35px;left:2px;top:18px;background:#ff9ec5;border-radius:8px}
.ribbon-v{position:absolute;width:24px;height:100%;background:#ffd6e7;left:53px}
.ribbon-h{position:absolute;height:20px;width:100%;background:#ffd6e7;top:35px}
@keyframes bob{50%{transform:translateY(-8px) rotate(1deg)}}
.opening .gift-lid{animation:lidFly .8s forwards}
.opening .gift-box{animation:boxPop .8s forwards}
@keyframes lidFly{to{transform:translateY(-80px) rotate(-12deg);opacity:0}}
@keyframes boxPop{50%{transform:scale(1.08)}to{transform:scale(.9);opacity:.2}}

/* Chuyển cảnh mở quà */
.gift-transition{position:fixed;inset:0;z-index:110;display:grid;place-items:center;pointer-events:none;opacity:0;visibility:hidden;overflow:hidden}
.gift-transition::before{
  content:"";position:absolute;width:18vmax;height:18vmax;border-radius:50%;
  background:radial-gradient(circle,#fff 0 5%,#ffd3e6 18%,rgba(255,116,174,.72) 38%,rgba(164,125,255,.25) 62%,transparent 72%);
  filter:blur(4px);transform:scale(0)
}
.transition-ring{position:absolute;width:13vmax;height:13vmax;border:2px solid rgba(255,225,239,.85);border-radius:50%;opacity:0}
.ring-two{width:20vmax;height:20vmax;border-color:rgba(193,166,255,.6)}
.transition-sparkle{position:absolute;color:white;font-size:clamp(2rem,7vw,6rem);opacity:0;text-shadow:0 0 35px #fff,0 0 70px #ff7fb2}
.transition-count-wrap{position:absolute;z-index:3;bottom:12vh;display:flex;flex-direction:column;align-items:center;gap:8px;color:#fff;opacity:0}
.transition-count-wrap strong{font-family:"Great Vibes",cursive;font-size:clamp(4rem,13vw,8rem);line-height:.8;text-shadow:0 0 28px #ff8fbd}
.transition-count-wrap span{font-size:.75rem;text-transform:uppercase;letter-spacing:.22em;color:#ffe0ec}
.count-pop{animation:countPop .8s cubic-bezier(.2,.8,.2,1)}
.gift-transitioning .intro-card{animation:introCinematic 5s cubic-bezier(.22,.8,.2,1) forwards}
.gift-transitioning .intro-screen{animation:introBackdrop 5s ease forwards}
.gift-transitioning .gift-transition{opacity:1;visibility:visible}
.gift-transitioning .gift-transition::before{animation:giftGlow 5s cubic-bezier(.2,.75,.18,1) forwards}
.gift-transitioning .ring-one{animation:ringExpand 2.4s 1.25s ease-out forwards}
.gift-transitioning .ring-two{animation:ringExpand 2.7s 1.65s ease-out forwards}
.gift-transitioning .transition-sparkle{animation:sparklePop 2.2s 2.15s ease-in-out forwards}
.gift-transitioning .transition-count-wrap{animation:countWrap 4.6s .15s ease both}
.gift-transitioning #floating-hearts{z-index:115}
.gift-opened .hero-content{animation:heroArrival 1.15s cubic-bezier(.2,.8,.2,1) both}
@keyframes introCinematic{
  0%,15%{transform:scale(1);filter:blur(0);opacity:1}
  28%{transform:scale(.97) rotate(-.3deg)}
  40%{transform:scale(1.025) rotate(.3deg)}
  54%{transform:scale(.99);filter:blur(0)}
  72%{transform:scale(1.06);opacity:1}
  100%{transform:scale(1.24);filter:blur(14px);opacity:0}
}
@keyframes introBackdrop{0%,62%{filter:brightness(1)}88%,100%{filter:brightness(1.7)}}
@keyframes giftGlow{
  0%,18%{transform:scale(0);opacity:0}
  35%{transform:scale(.28);opacity:.55}
  62%{transform:scale(1.15);opacity:1}
  84%{transform:scale(8);opacity:.96}
  100%{transform:scale(11);opacity:0}
}
@keyframes ringExpand{0%{transform:scale(.15);opacity:0}20%{opacity:1}100%{transform:scale(6);opacity:0}}
@keyframes sparklePop{0%{transform:scale(0) rotate(0);opacity:0}35%{transform:scale(1.35) rotate(90deg);opacity:1}100%{transform:scale(4) rotate(180deg);opacity:0}}
@keyframes countWrap{0%{opacity:0;transform:translateY(16px)}12%,78%{opacity:1;transform:none}100%{opacity:0;transform:translateY(-20px)}}
@keyframes countPop{0%{transform:scale(.35);opacity:0}45%{transform:scale(1.2);opacity:1}100%{transform:scale(1);opacity:1}}
@keyframes heroArrival{from{opacity:0;transform:translateY(45px) scale(.96);filter:blur(8px)}to{opacity:1;transform:none;filter:blur(0)}}

.hero-section{text-align:center;position:relative}
.hero-content{max-width:900px}
#timeGreeting{text-transform:none}
.script-title{font-family:"Great Vibes",cursive;font-weight:400;font-size:clamp(4rem,12vw,8.8rem);color:#ffd5e7;text-shadow:0 10px 50px rgba(255,127,178,.22);margin-bottom:15px}
.typing-text{font-size:clamp(1rem,2.2vw,1.28rem);min-height:70px;max-width:720px;margin:0 auto}
.scroll-hint{margin-top:42px;color:#bfb4c7;font-size:.8rem;animation:bob 2s infinite}

.section{position:absolute;inset:0;width:100%;height:100dvh;min-height:0;overflow:hidden;flex-direction:column;padding:70px 42px 105px;visibility:hidden;pointer-events:none;opacity:0;transform:translateX(11vw) scale(.97);filter:blur(9px);transition:opacity .65s ease,transform .75s cubic-bezier(.2,.8,.2,1),filter .65s ease,visibility .75s}
.section.slide-before{transform:translateX(-11vw) scale(.97)}
.section.slide-after{transform:translateX(11vw) scale(.97)}
.section.slide-active{visibility:visible;pointer-events:auto;opacity:1;transform:none;filter:none;z-index:2}
.section:not(.hero-section)>*{opacity:0;transform:translateY(45px) scale(.985);filter:blur(7px);transition:opacity .95s ease,transform .95s cubic-bezier(.2,.8,.2,1),filter .95s ease}
.section.section-visible>*{opacity:1;transform:none;filter:none}
.section.section-visible>*:nth-child(2){transition-delay:.12s}
.section.section-visible>*:nth-child(3){transition-delay:.22s}
.section-head{text-align:center;max-width:850px;margin-bottom:28px}
.section-copy{max-width:700px;margin:-8px auto 0;color:var(--muted);line-height:1.8}
.counter-grid{width:min(100%,950px);display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.counter-card{padding:28px;text-align:center}
.counter-card strong{display:block;font-size:clamp(2rem,6vw,4rem);color:#ffd6e7}
.counter-card span{color:var(--muted);font-size:.85rem}
.quote-card{width:min(100%,760px);padding:35px;margin-top:25px;position:relative;text-align:center}
.quote-mark{position:absolute;font-family:serif;font-size:6rem;opacity:.12;top:-5px;left:20px}
.quote-card p{margin:0;line-height:1.8;font-size:1.05rem}

.memory-grid{width:min(100%,1400px);display:grid;grid-template-columns:repeat(6,1fr);gap:13px}
.memories-section .section-head{margin-bottom:18px}.memories-section .section-head h2{font-size:clamp(2rem,4vw,3.35rem);margin-bottom:5px}
.photo-open-note{display:inline-flex;align-items:center;gap:8px;margin:8px 0 0;padding:8px 14px;border:1px solid rgba(255,183,213,.22);border-radius:999px;background:rgba(255,127,178,.08);color:#f3c8da;font-size:.72rem;letter-spacing:.03em;animation:photoNote 1.8s ease-in-out infinite}
.photo-open-note span{font-size:1rem;color:var(--pink)}
@keyframes photoNote{50%{border-color:rgba(255,183,213,.55);box-shadow:0 0 20px rgba(255,127,178,.12);transform:translateY(-2px)}}
.memory-card{
  background:#faf7f3;padding:8px 8px 12px;color:#28212c;border-radius:7px;
  box-shadow:0 20px 45px rgba(0,0,0,.25);transform:rotate(var(--tilt));transition:.6s cubic-bezier(.2,.8,.2,1);transition-delay:var(--delay,0ms);cursor:pointer
}
.memory-card.reveal{transform:translateY(60px) rotate(calc(var(--tilt) * 2)) scale(.88)}
.memory-card.reveal.visible{transform:rotate(var(--tilt));opacity:1}
.memory-card:hover{transform:rotate(0) translateY(-8px) scale(1.02);z-index:2}
.memory-card:focus-visible{outline:3px solid var(--pink);outline-offset:6px}
.memory-card img{width:100%;height:clamp(145px,21vh,205px);object-fit:cover;display:block;background:#ddd;border-radius:3px}
.memory-card p{margin:9px 4px 0;font-size:clamp(.58rem,.8vw,.76rem);line-height:1.4;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.memory-placeholder{
  width:100%;aspect-ratio:4/5;display:grid;place-items:center;text-align:center;padding:25px;
  background:linear-gradient(135deg,#f7dce8,#e9dcff);color:#675469;border-radius:3px;font-size:.9rem
}

/* Khu ảnh riêng của Thảo — spotlight + cuộn phim */
.muse-section{overflow:hidden;background:radial-gradient(circle at 50% 45%,rgba(255,162,201,.12),transparent 40%)}
.muse-section{padding-top:42px}.muse-section .section-head{margin-bottom:14px}.muse-section .section-head h2{font-size:clamp(2.1rem,4vw,3.4rem);margin-bottom:10px}
.muse-gallery{width:min(100%,980px);padding:15px;display:grid;grid-template-columns:minmax(280px,1.12fr) minmax(220px,.88fr);gap:16px;align-items:center;position:relative}
.muse-gallery::before,.muse-gallery::after{content:"✦";position:absolute;color:#ffd8e8;text-shadow:0 0 18px var(--pink);animation:twinkle 2s ease-in-out infinite}
.muse-gallery::before{left:-18px;top:16%;font-size:1.8rem}.muse-gallery::after{right:-15px;bottom:22%;animation-delay:.8s}
@keyframes twinkle{50%{opacity:.25;transform:scale(.65) rotate(45deg)}}
.muse-stage{height:min(43vh,390px);min-height:300px;border-radius:22px;overflow:hidden;position:relative;background:linear-gradient(145deg,#21192b,#0b0d1d);box-shadow:0 24px 70px rgba(0,0,0,.45)}
.muse-stage::before{content:"";position:absolute;inset:-28px;background-image:var(--muse-bg);background-size:cover;background-position:center;filter:blur(25px) brightness(.48) saturate(.9);transform:scale(1.12);opacity:.92;transition:background-image .3s ease}
.muse-stage::after{content:"";position:absolute;z-index:2;inset:0;box-shadow:inset 0 0 70px rgba(0,0,0,.34);pointer-events:none}
.muse-stage>img{width:100%;height:100%;min-height:0;position:absolute;z-index:1;inset:0;object-fit:contain;object-position:center;filter:drop-shadow(0 16px 35px rgba(0,0,0,.32))}
.muse-stage>img.muse-incoming{z-index:2;opacity:0;transform:scale(1.025);filter:blur(7px) drop-shadow(0 16px 35px rgba(0,0,0,.32));transition:opacity .9s ease,transform 1.05s cubic-bezier(.2,.8,.2,1),filter .85s ease}
.muse-stage>img.muse-incoming.visible{opacity:1;transform:none;filter:blur(0) drop-shadow(0 16px 35px rgba(0,0,0,.32))}
.muse-placeholder{position:absolute;z-index:1;inset:0;display:flex;flex-direction:column;justify-content:center;align-items:center;gap:10px;text-align:center;background:radial-gradient(circle at 50% 35%,#38243d,#121423 65%);color:#f8cddd}
.muse-placeholder span{font-size:5rem;font-family:"Great Vibes",cursive;animation:heartbeat 1.4s infinite}.muse-placeholder small{color:#a99cac}
.muse-copy{text-align:left;padding-right:18px}
.muse-toolbar{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:18px}.muse-toolbar>span{color:var(--pink2);font-weight:700;letter-spacing:.18em;font-size:.8rem}
.muse-play-toggle{display:inline-flex;align-items:center;gap:7px;padding:8px 12px;border:1px solid rgba(255,183,213,.25);border-radius:999px;background:rgba(255,127,178,.08);color:#f8d5e3;font:inherit;font-size:.68rem;font-weight:600;cursor:pointer;transition:.3s ease}.muse-play-toggle b{font-size:.72rem;color:var(--pink)}.muse-play-toggle:hover,.muse-play-toggle.playing{border-color:var(--pink);background:rgba(255,127,178,.17);box-shadow:0 0 22px rgba(255,127,178,.12)}
.muse-copy h3{font-family:"Great Vibes",cursive;color:#ffd5e7;font-weight:400;font-size:clamp(2.1rem,3.6vw,3.6rem);line-height:1.12;margin-bottom:14px}
.muse-copy p{color:var(--muted);font-size:.85rem;line-height:1.7}
.muse-film{grid-column:1/-1;display:flex;gap:9px;overflow-x:auto;padding:10px 5px 6px;scroll-snap-type:x mandatory;scrollbar-width:thin;scrollbar-color:var(--pink) transparent}
.muse-film::before,.muse-film::after{content:"";flex:0 0 8px}
.muse-frame{position:relative;flex:0 0 88px;height:100px;padding:6px;border:1px solid rgba(255,255,255,.14);border-radius:4px;background:#171424;cursor:pointer;opacity:.55;transition:.35s ease;scroll-snap-align:center;overflow:hidden}
.muse-frame::before,.muse-frame::after{content:"";position:absolute;left:0;right:0;height:6px;background:repeating-linear-gradient(90deg,transparent 0 8px,#f2c9da 8px 14px,transparent 14px 21px);z-index:2;opacity:.55}.muse-frame::before{top:2px}.muse-frame::after{bottom:2px}
.muse-frame img{width:100%;height:100%;object-fit:cover;border-radius:2px}.muse-frame span{display:grid;place-items:center;height:100%;color:#ffd3e5;font-size:1.4rem}
.muse-frame.active,.muse-frame:hover{opacity:1;transform:translateY(-6px);border-color:var(--pink);box-shadow:0 12px 30px rgba(255,127,178,.18)}

.distance-section{padding-top:45px}.distance-section .section-head{margin-bottom:13px}.distance-section .section-head h2{font-size:clamp(2.2rem,4.2vw,3.5rem);margin-bottom:8px}
.distance-card,.countdown-card{width:min(100%,850px);padding:23px 30px;text-align:center}
.places{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:18px;margin-bottom:16px}
.place{display:flex;gap:10px;justify-content:center;align-items:center}
.pulse-dot{width:12px;height:12px;border-radius:50%;background:var(--pink);box-shadow:0 0 0 0 rgba(255,127,178,.6);animation:pulse 2s infinite}
@keyframes pulse{70%{box-shadow:0 0 0 14px rgba(255,127,178,0)}}
.heart-line{display:flex;align-items:center;gap:8px;color:var(--pink)}
.heart-line span{display:block;width:70px;height:1px;background:linear-gradient(90deg,transparent,#ff8eba)}
.heart-line span:last-child{background:linear-gradient(90deg,#ff8eba,transparent)}
.heart-line b{font-size:1.5rem;animation:heartbeat 1.2s infinite}
#secretHeart{cursor:pointer;user-select:none}
@keyframes heartbeat{50%{transform:scale(1.22)}}
.countdown-card{margin-top:12px;overflow:hidden;position:relative}
.countdown-card::before{content:"2027";position:absolute;right:-8px;top:-36px;font-size:9rem;font-weight:800;color:rgba(255,255,255,.025);pointer-events:none}
.meeting-year{font-family:"Great Vibes",cursive;font-size:clamp(2rem,4vw,3.15rem);font-weight:400;color:#ffd1e3;margin:4px 0 15px;text-shadow:0 8px 28px rgba(255,127,178,.22)}
.countdown{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}
.countdown div{padding:11px;border-radius:18px;background:rgba(255,255,255,.05)}
.countdown strong{display:block;font-size:clamp(1.7rem,5vw,3.5rem)}
.countdown span{font-size:.78rem;color:var(--muted)}

.envelope-wrap{width:min(100%,820px);text-align:center}
.letter-note{display:flex;flex-direction:column;align-items:center;gap:5px;margin:0 0 5px;color:#ffd0e3;font-size:.92rem;font-weight:600;letter-spacing:.04em;animation:noteGlow 1.8s ease-in-out infinite}
.letter-note b{font-size:1.55rem;line-height:1;color:var(--pink);animation:noteArrow 1.15s ease-in-out infinite}
@keyframes noteGlow{50%{color:#fff;text-shadow:0 0 18px rgba(255,127,178,.8)}}
@keyframes noteArrow{50%{transform:translateY(8px)}}
.envelope{position:relative;width:280px;height:190px;border:0;background:transparent;cursor:pointer;margin:20px auto 35px;display:block}
.envelope-back{position:absolute;inset:0;background:#c65c86;border-radius:8px}
.paper-preview{
  position:absolute;left:25px;right:25px;top:22px;height:135px;background:#fff9f3;color:#6a5360;
  display:grid;place-items:center;font-family:"Great Vibes",cursive;font-size:2rem;border-radius:6px;transition:.7s ease
}
.envelope-front{position:absolute;inset:0;background:linear-gradient(145deg,transparent 49.5%,#ed88ae 50%);clip-path:polygon(0 0,50% 50%,100% 0,100% 100%,0 100%)}
.envelope-flap{position:absolute;inset:0;background:#f29abc;clip-path:polygon(0 0,100% 0,50% 58%);transform-origin:top;transition:.65s ease;z-index:3}
.envelope.open .envelope-flap{transform:rotateX(180deg);z-index:0}
.envelope.open .paper-preview{transform:translateY(-85px)}
.letter-card{padding:38px;text-align:left;max-height:58vh;overflow-y:auto;scrollbar-width:thin;scrollbar-color:var(--pink) transparent}
.letter-card h3{color:#ffd7e8;font-size:1.6rem}
.letter-card p{margin-bottom:18px}
.letter-line{opacity:0;transform:translateY(18px);filter:blur(5px)}
#letterContent.letter-revealed .letter-line{animation:letterTogether 1.35s cubic-bezier(.2,.8,.2,1) forwards}
@keyframes letterTogether{0%{opacity:0;transform:translateY(18px);filter:blur(5px)}55%{filter:blur(0)}100%{opacity:1;transform:none;filter:blur(0)}}
.signature{text-align:right;color:#ffc8df!important;font-family:"Great Vibes",cursive;font-size:1.8rem;opacity:0;transform:translateY(12px);transition:.8s ease}
.signature.signed{opacity:1;transform:none}
.hidden{display:none!important}

.final-card{width:min(100%,820px);padding:45px;text-align:center}
.surprise-message{margin-top:26px;font-family:"Great Vibes",cursive;font-size:clamp(2.3rem,7vw,4.7rem);color:#ffd1e3}

.music-player{position:fixed;right:18px;top:18px;z-index:90;display:flex;align-items:center;gap:10px;padding:7px 13px 7px 7px;border:1px solid var(--border);border-radius:999px;background:rgba(15,15,30,.68);box-shadow:0 12px 35px rgba(0,0,0,.18);backdrop-filter:blur(14px)}
.music-player.needs-play{border-color:var(--pink);animation:musicNudge 1.15s ease-in-out infinite;box-shadow:0 0 28px rgba(255,127,178,.24)}
@keyframes musicNudge{50%{transform:scale(1.04)}}
.music-toggle{position:relative;width:44px;height:44px;flex:none;border-radius:50%;border:1px solid rgba(255,255,255,.18);background:linear-gradient(145deg,#2a1c35,#101323);color:#fff;cursor:pointer}
.music-toggle.playing{animation:spin 4s linear infinite}
.music-info{display:flex;flex-direction:column;min-width:92px}.music-info span{text-transform:uppercase;letter-spacing:.15em;color:var(--pink2);font-size:.54rem}.music-info strong{font-size:.68rem;margin-top:2px}
.music-waves{display:flex;align-items:center;gap:2px;height:20px}.music-waves i{display:block;width:2px;height:5px;background:var(--pink2);border-radius:2px}.music-toggle.playing~.music-waves i{animation:wave .75s ease-in-out infinite alternate}.music-toggle.playing~.music-waves i:nth-child(2){animation-delay:.2s}.music-toggle.playing~.music-waves i:nth-child(3){animation-delay:.4s}.music-toggle.playing~.music-waves i:nth-child(4){animation-delay:.1s}
@keyframes wave{to{height:18px}}
@keyframes spin{to{transform:rotate(360deg)}}

.lightbox{position:fixed;inset:0;background:radial-gradient(circle at 50%,rgba(45,26,49,.9),rgba(0,0,0,.96));z-index:200;display:grid;grid-template-columns:auto minmax(0,900px) auto;align-items:center;gap:22px;padding:30px}
.lightbox figure{margin:0;text-align:center}.lightbox-photo-wrap{display:inline-flex;padding:12px 12px 42px;background:#fffaf6;transform:rotate(-.5deg);box-shadow:0 25px 80px #000}
.lightbox img{display:block;max-width:min(78vw,800px);max-height:68vh;object-fit:contain}
.lightbox img.slide-next{animation:photoNext .55s cubic-bezier(.2,.8,.2,1)}.lightbox img.slide-prev{animation:photoPrev .55s cubic-bezier(.2,.8,.2,1)}
@keyframes photoNext{from{opacity:0;transform:translateX(35px) scale(.96)}}@keyframes photoPrev{from{opacity:0;transform:translateX(-35px) scale(.96)}}
.lightbox figcaption{margin-top:18px}.lightbox figcaption span{font-size:.68rem;color:var(--pink2);letter-spacing:.2em}.lightbox p{margin:8px 0 0;color:white;text-align:center;line-height:1.6}
.lightbox-nav{width:55px;height:55px;border-radius:50%;border:1px solid rgba(255,255,255,.2);background:rgba(255,255,255,.08);color:#fff;font-size:2.5rem;cursor:pointer;transition:.25s}.lightbox-nav:hover{background:var(--pink);transform:scale(1.08)}
.close-btn{position:absolute;right:24px;top:18px;border:0;background:none;color:#fff;font-size:2.5rem;cursor:pointer}

/* Cảnh kết: 12 ảnh ghép thành trái tim */
.final-experience{position:fixed;inset:0;z-index:300;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:60px 20px 30px;background:radial-gradient(circle at 50% 30%,#3b1c3b,#0b0c18 62%,#05050b);opacity:0;transition:.55s ease;overflow:hidden}
.final-experience.show{opacity:1}.final-experience::before{content:"";position:absolute;z-index:0;inset:0;background-image:radial-gradient(circle,#fff 0 1px,transparent 1.5px);background-size:70px 70px;opacity:.16;animation:starDrift 14s linear infinite}
@keyframes starDrift{to{background-position:70px 140px}}
.falling-photos{position:absolute;z-index:0;inset:0;overflow:hidden;pointer-events:none;mask-image:linear-gradient(to bottom,transparent 0,#000 8%,#000 88%,transparent 100%);-webkit-mask-image:linear-gradient(to bottom,transparent 0,#000 8%,#000 88%,transparent 100%)}
.falling-photo{position:absolute;left:var(--fall-left);top:-28vh;width:var(--fall-size);aspect-ratio:4/5;object-fit:cover;padding:4px 4px 13px;background:#fff8f3;border-radius:5px;box-shadow:0 14px 30px rgba(0,0,0,.42);opacity:0;filter:blur(var(--fall-blur)) saturate(.78);animation:photoRain var(--fall-duration) linear var(--fall-delay) infinite;will-change:transform}
@keyframes photoRain{0%{opacity:0;transform:translate3d(0,-20vh,0) rotate(var(--fall-rotate)) scale(.82)}9%{opacity:var(--fall-opacity)}78%{opacity:var(--fall-opacity)}100%{opacity:0;transform:translate3d(var(--fall-drift),145vh,0) rotate(var(--fall-end-rotate)) scale(1.04)}}
.final-experience>.close-btn{z-index:10}
.heart-stage{width:min(58vw,510px);height:min(46vh,430px);flex:none;position:relative;z-index:1;isolation:isolate;perspective:1100px;transform-style:preserve-3d}
.heart-stage::before{content:"";position:absolute;z-index:-2;inset:12%;border-radius:50%;background:radial-gradient(circle,rgba(255,96,167,.45),rgba(173,92,255,.15) 45%,transparent 70%);filter:blur(26px);opacity:0}
.heart-stage::after{content:"";position:absolute;z-index:-1;inset:0;background:linear-gradient(145deg,#ff5ba5 3%,#9f48c7 52%,#321844 100%);clip-path:url(#smoothHeartClip);transform:translate3d(0,18px,-42px) scale(.98);filter:drop-shadow(0 30px 26px rgba(0,0,0,.55));opacity:0;transition:opacity .8s ease}
.memory-heart{width:100%;height:100%;display:grid;grid-template-columns:repeat(4,1fr);grid-template-rows:repeat(3,1fr);gap:3px;position:relative;z-index:1;overflow:hidden;clip-path:url(#smoothHeartClip);background:#421d4c;filter:drop-shadow(-5px 10px 5px rgba(22,4,29,.42)) drop-shadow(10px 24px 28px rgba(0,0,0,.44)) drop-shadow(0 0 3px rgba(255,226,239,.8));transform-style:preserve-3d;will-change:transform,filter}
.memory-heart::before{content:"";position:absolute;z-index:18;inset:0;pointer-events:none;background:radial-gradient(ellipse at 25% 15%,rgba(255,255,255,.82) 0 3%,rgba(255,255,255,.4) 9%,transparent 28%),radial-gradient(ellipse at 73% 13%,rgba(255,255,255,.7) 0 4%,rgba(255,238,246,.26) 14%,transparent 31%),radial-gradient(ellipse at 50% 5%,rgba(30,0,35,.65) 0 2%,transparent 17%),radial-gradient(ellipse at 50% 5%,transparent 0 45%,rgba(45,4,48,.38) 56%,transparent 72%),linear-gradient(180deg,rgba(255,255,255,.2),transparent 42%,rgba(25,2,35,.48) 100%);mix-blend-mode:soft-light}
.memory-heart::after{content:"";position:absolute;z-index:20;inset:-8%;pointer-events:none;background:linear-gradient(112deg,transparent 25%,rgba(255,255,255,.58) 40%,rgba(255,219,236,.18) 48%,transparent 63%);transform:translateX(-130%) skewX(-8deg);mix-blend-mode:screen}
.heart-wave{position:absolute;z-index:-3;left:50%;top:50%;width:100%;height:100%;border:0;background:linear-gradient(145deg,rgba(255,113,177,.6),rgba(159,100,255,.2));clip-path:url(#smoothHeartClip);opacity:0;transform:translate(-50%,-50%) scale(.9);filter:blur(1px) drop-shadow(0 0 18px rgba(255,103,171,.75));pointer-events:none}
.memory-heart img{width:100%;height:100%;display:block;object-fit:cover;opacity:0;transform:translate(var(--fly-x),var(--fly-y)) scale(.16) rotate(var(--fly-r));filter:blur(7px);transition:opacity 1.5s ease,transform 4.15s cubic-bezier(.12,.75,.16,1),filter 2.8s ease;transition-delay:calc(var(--i) * 50ms)}
.final-experience.show .memory-heart img{opacity:.92;transform:none;filter:blur(0)}
.final-experience.heart-complete .heart-stage::after{opacity:1}
.final-experience.heart-complete .memory-heart{animation:finalHeartBeat3D 2.2s cubic-bezier(.22,.61,.36,1) infinite}
.final-experience.heart-complete .memory-heart::after{animation:heartShine 4.4s 1s ease-in-out infinite}
.final-experience.heart-complete .heart-stage::before{animation:heartGlowBeat 2.2s ease-in-out infinite}
.final-experience.heart-complete .heart-wave{animation:heartWave 2.2s cubic-bezier(.16,.65,.25,1) infinite}.final-experience.heart-complete .wave-b{animation-delay:.34s;background:linear-gradient(145deg,rgba(191,130,255,.48),rgba(255,102,170,.12))}
@keyframes finalHeartBeat3D{0%,100%{transform:rotateX(3deg) rotateY(-2deg) scale(1);filter:drop-shadow(0 22px 38px rgba(255,68,145,.32))}10%{transform:rotateX(1deg) rotateY(1deg) scale(1.026)}18%{transform:rotateX(3deg) rotateY(-1deg) scale(1.006)}30%{transform:rotateX(-1deg) rotateY(2deg) scale(1.07);filter:drop-shadow(0 30px 70px rgba(255,68,145,.62))}44%{transform:rotateX(2deg) rotateY(-1deg) scale(1.015)}64%{transform:rotateX(4deg) rotateY(-3deg) scale(1)}82%{transform:rotateX(2deg) rotateY(2deg) scale(1.008)}}
@keyframes heartGlowBeat{0%,100%{opacity:.16;transform:scale(.9)}12%{opacity:.42;transform:scale(1.02)}30%{opacity:.95;transform:scale(1.22)}54%{opacity:.25;transform:scale(1.42)}}
@keyframes heartWave{0%,10%{opacity:0;transform:translate(-50%,-50%) scale(.86)}28%{opacity:.42}72%,100%{opacity:0;transform:translate(-50%,-50%) scale(2.05);filter:blur(6px) drop-shadow(0 0 30px rgba(255,103,171,.45))}}
@keyframes heartShine{0%,28%{transform:translateX(-130%) skewX(-8deg);opacity:0}42%{opacity:.8}65%,100%{transform:translateX(135%) skewX(-8deg);opacity:0}}
.heart-particle{position:absolute;z-index:5;left:50%;top:48%;color:#ff91c1;font-style:normal;font-size:clamp(.7rem,1.4vw,1.15rem);pointer-events:none;text-shadow:0 0 12px #ff68a8;animation:heartParticle 1.45s cubic-bezier(.16,.75,.25,1) var(--particle-delay) forwards}
@keyframes heartParticle{0%{opacity:0;transform:translate(-50%,-50%) scale(.25) rotate(0)}15%{opacity:1}75%{opacity:.85}100%{opacity:0;transform:translate(calc(-50% + var(--burst-x)),calc(-50% + var(--burst-y))) scale(1.25) rotate(180deg)}}
.final-experience-copy{text-align:center;position:relative;z-index:2;margin-top:-8px;opacity:0;transform:translateY(22px);transition:.9s cubic-bezier(.2,.8,.2,1)}.final-experience.heart-complete .final-experience-copy{opacity:1;transform:none}.final-experience-copy p{text-transform:uppercase;letter-spacing:.25em;font-size:.68rem;color:var(--pink2);margin-bottom:7px}.final-experience-copy h2{font-family:"Great Vibes",cursive;font-weight:400;color:#ffd5e7;margin:0;font-size:clamp(2.7rem,7vw,5rem)}.final-experience-copy span{display:block;color:var(--muted);margin:5px 0 20px}
.secret-toast{position:fixed;z-index:400;left:50%;bottom:28px;width:min(calc(100% - 32px),620px);padding:17px 22px;border:1px solid rgba(255,255,255,.2);border-radius:999px;background:rgba(32,20,43,.9);color:#ffd8e8;text-align:center;box-shadow:0 18px 50px rgba(0,0,0,.4);backdrop-filter:blur(16px);opacity:0;transform:translate(-50%,25px);transition:.4s ease}.secret-toast.show{opacity:1;transform:translate(-50%,0)}

/* Điều hướng từng màn hình */
.section-nav{position:fixed;z-index:80;left:50%;bottom:18px;transform:translateX(-50%);width:min(calc(100% - 32px),760px);display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:18px;padding:9px 12px;border:1px solid rgba(255,255,255,.14);border-radius:999px;background:rgba(11,12,27,.72);box-shadow:0 18px 55px rgba(0,0,0,.28);backdrop-filter:blur(18px)}
.section-nav-btn{justify-self:start;display:flex;align-items:center;gap:8px;border:0;background:transparent;color:#fff;font:inherit;font-size:.78rem;font-weight:600;cursor:pointer;padding:10px 14px;border-radius:999px;transition:.25s}.section-nav-btn.next{justify-self:end}.section-nav-btn:hover:not(:disabled){background:rgba(255,127,178,.15);color:#ffd2e4}.section-nav-btn:disabled{opacity:.22;cursor:default}
.section-position{display:flex;flex-direction:column;align-items:center;gap:5px;min-width:150px}.section-position>span{font-size:.68rem;letter-spacing:.06em;color:#e2d7e5;white-space:nowrap}
.section-dots{display:flex;align-items:center;gap:7px}.section-dots button{width:6px;height:6px;padding:0;border:0;border-radius:50%;background:rgba(255,255,255,.24);cursor:pointer;transition:.3s}.section-dots button.active{width:24px;border-radius:99px;background:linear-gradient(90deg,var(--pink),var(--purple));box-shadow:0 0 12px rgba(255,127,178,.45)}

.reveal{opacity:0;transform:translateY(24px);transition:.9s ease}
.reveal.visible{opacity:1;transform:none}

@media(max-width:760px){
  .screen{padding:75px 16px}.section{padding:58px 13px 92px}
  .intro-card{padding:35px 20px}
  .counter-grid{grid-template-columns:1fr}
  .memory-grid{display:flex;max-width:none;width:100%;gap:14px;overflow-x:auto;padding:18px 18vw 22px;scroll-snap-type:x mandatory;scrollbar-width:thin;scrollbar-color:var(--pink) transparent}
  .memory-card{flex:0 0 min(62vw,245px);transform:rotate(0)!important;scroll-snap-align:center}.memory-card img{height:min(37vh,310px)}.memory-card p{font-size:.72rem}
  .places{grid-template-columns:1fr}
  .heart-line{justify-content:center;transform:rotate(90deg);margin:10px 0}
  .countdown{grid-template-columns:repeat(2,1fr)}
  .distance-card,.countdown-card,.final-card,.letter-card{padding:27px 20px}
  .distance-section .section-head{margin-bottom:8px}.distance-section .section-head h2{font-size:2.1rem;margin-bottom:5px}.distance-section .distance-card{padding:14px 16px}.distance-section .places{margin-bottom:8px;gap:3px}.distance-section .heart-line{margin:3px 0}.distance-section .distance-card p{font-size:.74rem;line-height:1.45;margin-bottom:0}.distance-section .countdown-card{padding:13px 12px;margin-top:8px}.distance-section .meeting-year{font-size:1.75rem;margin:2px 0 9px}.distance-section .countdown div{padding:8px}.distance-section .countdown-card>.eyebrow{margin-bottom:5px}
  .envelope{transform:scale(.9)}
  .love-progress{display:none}
  .music-player{right:10px;top:10px}.music-info{display:none}.music-waves{display:none}
  .muse-section .section-head{margin-bottom:12px}.muse-section .section-head h2{font-size:2.25rem;margin-bottom:10px}.muse-section .section-copy{font-size:.75rem;line-height:1.45}
  .muse-gallery{grid-template-columns:1fr;padding:10px;gap:10px}.muse-stage,.muse-stage>img{min-height:0;height:32vh}.muse-copy{padding:0 8px;text-align:center}.muse-toolbar{margin-bottom:6px}.muse-copy h3{font-size:1.8rem;margin-bottom:6px}.muse-copy p{display:none}.muse-film{grid-column:1;padding:8px 2px 4px}.muse-frame{flex-basis:72px;height:82px}
  .lightbox{grid-template-columns:1fr;padding:55px 12px 22px}.lightbox-photo-wrap{padding:8px 8px 30px}.lightbox img{max-width:88vw;max-height:62vh}.lightbox-nav{position:absolute;bottom:24px;width:46px;height:46px;z-index:2}.lightbox-nav.prev{left:22px}.lightbox-nav.next{right:22px}
  .heart-stage{width:min(92vw,430px);height:min(43vh,360px)}
  .section-nav{bottom:9px;width:calc(100% - 18px);gap:5px;padding:7px}.section-nav-btn{padding:10px;font-size:1.25rem}.section-nav-btn span{display:none}.section-position{min-width:145px}.section-position>span{font-size:.5rem}
}
/* Bố cục gọn cho MacBook Pro và màn hình laptop 16:10 */
@media (min-width:900px) and (max-height:900px){
  .section{padding:34px 32px 84px}
  .section-head{margin-bottom:14px}
  .section-head h2{font-size:clamp(2.2rem,4vw,3.35rem);margin-bottom:8px}
  .hero-content{transform:scale(.92)}
  .counter-grid{max-width:900px;gap:14px}.counter-card{padding:19px}.counter-card strong{font-size:clamp(2.4rem,4.8vw,3.5rem)}
  .quote-card{max-width:720px;padding:23px;margin-top:16px}
  .memories-section .section-head{margin-bottom:10px}.memory-card img{height:clamp(125px,19vh,175px)}
  .muse-section{padding-top:24px}.muse-section .section-head{margin-bottom:8px}.muse-gallery{padding:12px;gap:12px}.muse-stage{height:min(39vh,330px);min-height:250px}.muse-film{padding:7px 4px 4px}.muse-frame{height:82px;flex-basis:76px}.muse-copy h3{font-size:clamp(1.9rem,3.2vw,3rem);margin-bottom:6px}.muse-toolbar{margin-bottom:9px}
  .distance-section{padding-top:24px}.distance-section .section-head{margin-bottom:7px}.distance-section .section-head h2{font-size:clamp(2.2rem,4vw,3.2rem);margin-bottom:3px}
  .distance-card,.countdown-card{max-width:900px;padding:15px 24px}.places{margin-bottom:9px}.distance-card p{margin-bottom:0;line-height:1.55;font-size:.92rem}
  .countdown-card{margin-top:8px}.countdown-card>.eyebrow{margin-bottom:4px}.meeting-year{font-size:clamp(1.9rem,3.4vw,2.65rem);margin:1px 0 8px}.countdown{gap:8px}.countdown div{padding:7px 10px}.countdown strong{font-size:clamp(2rem,4vw,2.8rem)}
  .letter-section .section-head{margin-bottom:10px}.letter-card{max-height:55vh;padding:25px 30px}
  .final-card{padding:30px}
  .section-nav{bottom:10px;padding:7px 11px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;scroll-behavior:auto!important;transition-duration:.01ms!important}
}