/* DNKC · 20/10/2026 — palette from the club logo: plum-maroon #571F33, rose accent, warm paper */
:root{
  color-scheme:light dark;
  --bg:#f7efe7; --paper:#fffaf5; --ink:#2b1620; --muted:#6e5560;
  --ai:#571f33; --ai-deep:#3a1422; --ai-mid:#73304a; --ai-soft:#f1e2e6;
  --shu:#9c3658; --shu-hover:#7f2945; --shu-ink:#9c3658; --on-shu:#fff8f3; --beni:#a02c3c; --shu-soft:#f4dfe3; --shu-light:#e7b7c3;
  --gold:#b08d57; --line:rgba(87,31,51,.15);
  --on-ai:#fcf4ef; --on-ai-muted:#e6cfd6; --on-ai-accent:#f3c2cd;
  --envelope:#f0e4d9; --envelope-deep:#dec9bc; --envelope-fold:#e8d6ca;
  --sheet-1:#fffaf5; --sheet-2:#f5eadf; --sheet-3:#f7e1e4;
  --card-1:#fffaf5; --card-2:#f4eadf; --card-3:#f6e2e5; --card-ink:#2b1620;
  --shadow:0 26px 70px rgba(58,20,34,.16); --shadow-soft:0 14px 35px rgba(58,20,34,.11);
  --ease:cubic-bezier(.16,1,.3,1);
  --serif:"Playfair Display","Noto Serif",Georgia,serif;
  --sans:"Be Vietnam Pro",system-ui,-apple-system,"Segoe UI",sans-serif;
  --jp:"Noto Serif JP","Yu Mincho","Hiragino Mincho ProN",serif;
}
@media (prefers-color-scheme:dark){
  :root{
    --bg:#170b11; --paper:#22121a; --ink:#f6eaec; --muted:#c6aeb7;
    --ai:#4b1a2c; --ai-deep:#200a13; --ai-mid:#6b2841; --ai-soft:#2d1520;
    --shu:#e59ab0; --shu-hover:#f0b3c4; --shu-ink:#9c3658; --on-shu:#2a0e18; --beni:#f08c9c; --shu-soft:#3a1a26; --shu-light:#e9a7b9;
    --gold:#d6b27a; --line:rgba(246,234,236,.14);
    --envelope:#dccbbd; --envelope-deep:#c8b2a4; --envelope-fold:#d3bfb1;
    --card-1:#f7efe7; --card-2:#ece0d4; --card-3:#f0dadf;
    --shadow:0 26px 70px rgba(0,0,0,.42); --shadow-soft:0 14px 35px rgba(0,0,0,.3);
  }
}

*{box-sizing:border-box}
html{overflow-x:hidden;scroll-behavior:smooth;scroll-padding-top:72px}
body{margin:0;overflow-x:hidden;background:var(--bg);color:var(--ink);font-family:var(--sans);line-height:1.65;-webkit-font-smoothing:antialiased}
main{width:100%;overflow-x:clip}
img{display:block;width:100%;max-width:100%}
button,input,textarea{font:inherit;color:inherit}
a{color:inherit}
h1,h2,h3,p,figure,blockquote{margin-top:0}
::selection{background:var(--shu-soft)}
:focus-visible{outline:2px solid var(--shu);outline-offset:3px}
.skip-link{position:fixed;left:12px;top:-60px;z-index:100;background:var(--paper);color:var(--ink);padding:10px 16px;border-radius:999px;box-shadow:var(--shadow-soft);text-decoration:none;font-weight:600;transition:top .25s ease}
.skip-link:focus{top:12px}

.wrap{width:min(1160px,calc(100% - 48px));margin-inline:auto}
.eyebrow{font-size:.74rem;letter-spacing:.16em;text-transform:uppercase;font-weight:600;color:var(--shu);margin-bottom:12px}
.section-title{font:500 clamp(2.3rem,5.2vw,4.8rem)/1.05 var(--serif);letter-spacing:-.03em;margin-bottom:20px;overflow-wrap:break-word}
.section-title em{font-weight:500;color:var(--shu)}

/* ---------- photo media + kendo placeholder ---------- */
.media{position:relative;overflow:hidden;width:100%;height:100%;
  background:
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 120 120' fill='none' stroke='%23f6efe2' stroke-linecap='round'%3E%3Cpath d='M93 31a40 40 0 1 0 8 27' stroke-width='5' opacity='.5'/%3E%3Cpath d='M32 90 89 27M31 27l58 63' stroke-width='3' opacity='.42'/%3E%3Ccircle cx='40' cy='81' r='5.5' stroke-width='2.4' opacity='.42'/%3E%3Ccircle cx='80' cy='81' r='5.5' stroke-width='2.4' opacity='.42'/%3E%3C/svg%3E") center/min(42%,150px) no-repeat,
    radial-gradient(circle at 78% 18%,rgba(156,54,88,.5),transparent 52%),
    radial-gradient(circle at 12% 92%,rgba(176,141,87,.28),transparent 46%),
    linear-gradient(150deg,var(--ai-mid),var(--ai-deep));
}
.media::after{content:"剣道";position:absolute;right:12px;top:12px;font:600 .72rem/1 var(--jp);letter-spacing:.2em;color:rgba(246,239,226,.5);pointer-events:none}
.media.has-img::after{display:none}
.media img{position:absolute;inset:0;height:100%;object-fit:cover;opacity:0;transition:opacity .6s ease,transform 1s var(--ease)}
.media img.loaded{opacity:1}

/* ---------- petals ---------- */
.petal-field{position:fixed;inset:0;overflow:hidden;pointer-events:none;z-index:12;contain:strict}
.petal{position:absolute;top:-8vh;left:var(--left);width:var(--size);height:calc(var(--size)*1.3);border-radius:68% 32% 72% 28% / 72% 30% 70% 28%;
  background:radial-gradient(circle at 30% 25%,rgba(255,255,255,.9) 0 8%,transparent 9%),linear-gradient(145deg,#ffeef0 0 30%,#f5bcc6 64%,#d9818f);
  opacity:0;animation:petalFall var(--dur) linear infinite;animation-delay:var(--delay);transform-origin:45% 20%;filter:saturate(.85)}
.petal.blossom{height:var(--size);border-radius:50%;background:radial-gradient(circle,#c4566b 0 9%,#f8c8d2 10% 24%,transparent 25%),conic-gradient(from 10deg,#ffe4ea 0 15%,transparent 16% 20%,#f6bcc9 21% 35%,transparent 36% 40%,#ffe8ee 41% 55%,transparent 56% 60%,#f2adbd 61% 75%,transparent 76% 80%,#ffdde5 81% 95%,transparent 96%)}
@keyframes petalFall{
  0%{transform:translate3d(0,-10vh,0) rotate(0) rotateY(0);opacity:0}
  6%{opacity:var(--op)}
  50%{transform:translate3d(var(--sway),50vh,0) rotate(200deg) rotateY(130deg)}
  88%{opacity:calc(var(--op)*.7)}
  100%{transform:translate3d(var(--drift),114vh,0) rotate(420deg) rotateY(250deg);opacity:0}
}

/* ---------- nav ---------- */
.site-nav{position:fixed;left:0;right:0;top:0;z-index:30;display:grid;grid-template-columns:minmax(0,1fr) auto minmax(0,1fr);align-items:center;gap:20px;padding:10px max(24px,calc((100vw - 1160px)/2));color:var(--on-ai);
  background:linear-gradient(90deg,rgba(58,20,34,.62),rgba(87,31,51,.48));border-bottom:1px solid rgba(255,255,255,.18);backdrop-filter:blur(20px) saturate(140%);-webkit-backdrop-filter:blur(20px) saturate(140%);
  animation:navArrive .8s .6s var(--ease) both;transition:color .35s ease,background .35s ease,box-shadow .35s ease}
@keyframes navArrive{from{opacity:0;transform:translateY(-100%)}to{opacity:1;transform:none}}
.site-nav.is-scrolled{color:var(--ink);background:color-mix(in srgb,var(--paper) 80%,transparent);border-bottom-color:var(--line);box-shadow:0 10px 30px rgba(58,20,34,.1)}
.nav-brand{display:flex;align-items:center;gap:10px;min-width:0;justify-self:start;text-decoration:none;white-space:nowrap}
.nav-mark{width:36px;height:36px;flex:none;border-radius:50%;background:#fff6ea;padding:2px;object-fit:contain;box-shadow:0 2px 8px rgba(0,0,0,.18)}
.nav-brand strong{font:600 1.08rem/1 var(--serif);letter-spacing:.06em}
.nav-sep{width:1px;height:22px;background:currentColor;opacity:.4;flex:none}
.nav-title{font-size:.72rem;font-weight:600;overflow:hidden;text-overflow:ellipsis;min-width:0}
.nav-links{display:flex;gap:clamp(18px,2.8vw,36px)}
.site-nav a{text-decoration:none}
.nav-links a,.mobile-nav a{position:relative;font-size:.8rem;font-weight:600;white-space:nowrap}
.nav-links a::after{content:"";position:absolute;left:0;right:0;bottom:-7px;height:1px;background:currentColor;transform:scaleX(0);transform-origin:right;transition:transform .35s var(--ease)}
.nav-links a:hover::after,.nav-links a[aria-current="true"]::after{transform:scaleX(1);transform-origin:left}
.nav-burger{display:none;justify-self:end;width:42px;height:42px;border:0;background:transparent;border-radius:50%;cursor:pointer;padding:0;position:relative}
.nav-burger span{position:absolute;left:11px;right:11px;height:1.6px;background:currentColor;border-radius:2px;transition:transform .35s var(--ease),opacity .2s ease}
.nav-burger span:nth-child(1){top:14px}.nav-burger span:nth-child(2){top:20px}.nav-burger span:nth-child(3){top:26px}
.nav-burger[aria-expanded="true"] span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-burger[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-burger[aria-expanded="true"] span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
.mobile-nav{grid-column:1/-1;display:flex;flex-direction:column;gap:2px;padding:6px 0 10px}
.mobile-nav[hidden]{display:none}
.mobile-nav a{padding:12px 4px;border-top:1px solid rgba(255,255,255,.14);font-size:.95rem}
.site-nav.is-scrolled .mobile-nav a{border-top-color:var(--line)}
.mobile-nav a[aria-current="true"]{color:var(--on-ai-accent)}
.site-nav.is-scrolled .mobile-nav a[aria-current="true"]{color:var(--shu)}

/* ---------- hero ---------- */
.hero{min-height:100svh;position:relative;display:grid;align-items:center;overflow:hidden;padding:96px 0 80px;isolation:isolate;--px:0;--py:0;
  background:linear-gradient(106deg,var(--ai-deep) 0,var(--ai) 47%,var(--shu-light) 47% 49%,var(--shu-soft) 49% 74%,var(--bg) 74%)}
@media (prefers-color-scheme:dark){.hero{background:linear-gradient(106deg,var(--ai-deep) 0,var(--ai) 47%,#7a3550 47% 49%,var(--shu-soft) 49% 74%,var(--bg) 74%)}}
.hero-texture{position:absolute;inset:0 auto 0 0;width:47%;z-index:-1;pointer-events:none;opacity:.55;
  background:
    repeating-linear-gradient(45deg,rgba(255,255,255,.035) 0 2px,transparent 2px 12px),
    repeating-linear-gradient(-45deg,rgba(255,255,255,.035) 0 2px,transparent 2px 12px)}
.hero-kanji{position:absolute;right:-.06em;bottom:-.18em;z-index:-1;font:600 clamp(9rem,22vw,20rem)/1 var(--jp);color:rgba(87,31,51,.07);pointer-events:none;letter-spacing:-.05em}
@media (prefers-color-scheme:dark){.hero-kanji{color:rgba(246,234,236,.05)}}
.hero::after{content:"";position:absolute;width:520px;height:520px;border:1px solid rgba(156,54,88,.18);border-radius:50%;right:-180px;top:-190px;z-index:-1;box-shadow:0 0 0 52px transparent,0 0 0 53px rgba(156,54,88,.12),0 0 0 105px transparent,0 0 0 106px rgba(87,31,51,.08)}
.hero-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:clamp(34px,7vw,96px);align-items:center}
.hero-copy{color:var(--on-ai);position:relative;z-index:2;min-width:0}
.date-line{display:flex;align-items:center;flex-wrap:wrap;gap:12px;margin-bottom:26px;color:var(--on-ai-accent);font-weight:600;font-size:.78rem;letter-spacing:.12em;text-transform:uppercase}
.date-line::before{content:"";width:40px;height:1px;background:currentColor;transform-origin:left;animation:drawLine 1s .25s var(--ease) both}
.date-line .brand{letter-spacing:.14em;color:var(--on-ai)}
@keyframes drawLine{from{transform:scaleX(0)}to{transform:scaleX(1)}}
h1{font:500 clamp(3.4rem,7vw,6.8rem)/.9 var(--serif);letter-spacing:-.045em;margin:0 0 28px}
.hero-line{display:block;overflow:hidden;padding-bottom:.18em;margin-bottom:-.1em}
.hero-line>span{display:block;transform:translateY(110%) rotate(3deg);animation:titleRise 1s .2s var(--ease) forwards}
.hero-line-i{font-style:italic;font-size:.62em;color:var(--on-ai-accent);padding-left:.2em;letter-spacing:-.02em}
.hero-line-i>span{animation-delay:.38s}
@keyframes titleRise{to{transform:none}}
.hero-lead{max-width:520px;color:var(--on-ai-muted);font-size:clamp(.98rem,1.35vw,1.12rem);animation:fadeUp .9s .55s var(--ease) both}
@keyframes fadeUp{from{opacity:0;transform:translateY(18px)}to{opacity:1;transform:none}}
.countdown{margin:26px 0;animation:fadeUp .9s .7s var(--ease) both}
.countdown-kicker{font-size:.72rem;letter-spacing:.16em;text-transform:uppercase;color:var(--on-ai-accent);font-weight:600;margin:0 0 12px}
.countdown-units{display:flex;align-items:stretch;gap:8px}
.countdown-unit{display:flex;flex-direction:column;align-items:center;justify-content:center;min-width:66px;padding:12px 8px 10px;border:1px solid rgba(243,194,205,.32);border-radius:14px;background:rgba(255,255,255,.07)}
.countdown-unit strong{font:500 1.75rem/1 var(--serif);color:var(--on-ai);font-variant-numeric:tabular-nums}
.countdown-unit span{font-size:.64rem;letter-spacing:.12em;text-transform:uppercase;color:var(--on-ai-accent);margin-top:7px}
.countdown-sep{align-self:center;color:var(--on-ai-accent);font-size:1.3rem;opacity:.6}
.countdown-done{display:flex;align-items:center;gap:14px;padding:14px 18px;border:1px solid rgba(243,194,205,.4);border-radius:16px;background:rgba(255,255,255,.08);max-width:520px}
.countdown-done b{flex:none;width:44px;height:44px;border-radius:50%;display:grid;place-items:center;background:var(--shu);color:var(--on-shu);font:600 1rem/1 var(--jp)}
.countdown-done p{margin:0;color:var(--on-ai);font:500 1.08rem/1.4 var(--serif)}
.countdown-done small{display:block;font:500 .78rem/1.5 var(--sans);color:var(--on-ai-muted)}

.soft-btn{display:inline-flex;align-items:center;justify-content:center;gap:11px;border:0;background:var(--shu);color:var(--on-shu);padding:14px 22px;border-radius:999px;text-decoration:none;font-weight:600;cursor:pointer;box-shadow:0 10px 25px rgba(156,54,88,.22);transition:transform .25s ease,background .25s ease}
.soft-btn:hover{transform:translateY(-2px);background:var(--shu-hover)}
.soft-btn svg{width:17px;height:17px}
.hero-cta{background:var(--on-ai);color:var(--ai);box-shadow:0 14px 34px rgba(26,8,14,.3);animation:fadeUp .9s .85s var(--ease) both}
.hero-cta:hover{background:#fff;color:var(--shu-ink)}

.hero-photo{position:relative;height:min(68vw,660px);min-height:540px;perspective:1100px}
.polaroid{position:absolute;margin:0;background:#fffaf5;box-shadow:var(--shadow);padding:10px 10px 46px;clip-path:inset(0 0 100% 0);animation:uncover 1s .35s var(--ease) forwards;transition:transform .85s var(--ease)}
.polaroid.small{animation-delay:.65s}
@keyframes uncover{to{clip-path:inset(0)}}
.polaroid:hover .media img{transform:scale(1.04)}
.polaroid.main{width:82%;height:70%;right:2%;top:7%;transform:translate3d(calc(var(--px)*12px),calc(var(--py)*10px),0) rotate(calc(2.5deg + var(--px)*1deg))}
.polaroid.small{width:54%;height:42%;left:0;bottom:4%;z-index:2;transform:translate3d(calc(var(--px)*-16px),calc(var(--py)*-12px),0) rotate(calc(-5deg + var(--px)*-1.4deg))}
.polaroid figcaption{position:absolute;bottom:12px;left:16px;right:16px;font:italic 500 1rem/1.2 var(--serif);color:#3a1f2b;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.seal{position:absolute;right:2%;bottom:7%;z-index:4;width:128px;aspect-ratio:1;border-radius:50%;display:grid;place-items:center;text-align:center;background:var(--shu);color:var(--on-shu);transform:rotate(-10deg);box-shadow:var(--shadow-soft),inset 0 0 0 6px rgba(255,255,255,.08);font:600 .62rem/1.25 var(--sans);letter-spacing:.24em;animation:sealIn .9s 1s var(--ease) both}
.seal::before{content:"";position:absolute;inset:8px;border:1px dashed rgba(255,246,234,.5);border-radius:50%}
.seal em{display:block;font:600 .78rem/1 var(--jp);letter-spacing:.28em;font-style:normal;margin-bottom:4px;opacity:.9}
.seal strong{display:block;font:500 1.95rem/1.05 var(--serif);letter-spacing:-.02em;margin-bottom:2px}
@keyframes sealIn{from{opacity:0;transform:rotate(-40deg) scale(.6)}to{opacity:1;transform:rotate(-10deg) scale(1)}}

/* ---------- memories slider ---------- */
.memories{padding:clamp(88px,11vw,150px) 0;background-color:var(--paper);
  background-image:radial-gradient(circle,rgba(87,31,51,.08) 0 1px,transparent 1.5px);background-size:22px 22px}
.slider-shell{display:grid;grid-template-columns:minmax(0,1.42fr) minmax(250px,.58fr);background:var(--bg);box-shadow:var(--shadow);transition:transform .65s var(--ease),box-shadow .5s ease,opacity .75s ease,filter .8s ease}
.slider-shell:hover{transform:translateY(-6px)}
.slider-shell:focus-visible{outline-offset:6px}
.slider-media{display:flex;flex-direction:column;min-width:0}
.slider-viewport{position:relative;overflow:hidden;aspect-ratio:3/2;min-height:260px;touch-action:pan-y;background:var(--ai-deep);user-select:none}
.slide{position:absolute;inset:0;margin:0;opacity:0;visibility:hidden;transition:opacity .8s ease,visibility .8s}
.slide.active{opacity:1;visibility:visible;z-index:1}
.slide .media img{transform:scale(1.05)}
.slide.active .media img{animation:slowFocus 7s ease-out both}
@keyframes slowFocus{from{transform:scale(1.05)}to{transform:scale(1)}}
.slide::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 58%,rgba(30,10,18,.72));pointer-events:none}
.slide figcaption{position:absolute;left:18px;bottom:16px;z-index:2;padding:7px 15px;border-radius:999px;background:rgba(30,10,18,.55);color:#fbf5ea;font-size:.78rem;font-weight:700;letter-spacing:.14em;backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);border:1px solid rgba(255,255,255,.22)}
.slider-controls-bar{padding:20px clamp(18px,3vw,34px) 24px}
.slider-dots{display:flex;flex-wrap:wrap;justify-content:center;gap:7px;row-gap:9px}
.slider-dot{width:20px;height:14px;padding:0;border:0;background:transparent;cursor:pointer;position:relative}
.slider-dot::before{content:"";position:absolute;left:0;right:0;top:50%;height:3px;translate:0 -50%;background:var(--line);transition:background .3s ease}
.slider-dot.active{width:40px}
.slider-dot{transition:width .3s ease}
.slider-dot.active::before{background:var(--shu)}
.slider-bottom{display:flex;align-items:center;justify-content:center;gap:24px;margin-top:16px}
.slide-count{font:500 1.1rem var(--serif);color:var(--shu);white-space:nowrap;font-variant-numeric:tabular-nums}
.slide-count strong{font-size:2rem;font-weight:500}
.round-btn{width:46px;height:46px;border-radius:50%;border:1px solid var(--line);background:transparent;color:var(--ink);display:grid;place-items:center;cursor:pointer;transition:background .25s ease,color .25s ease,border-color .25s ease}
.round-btn:hover{background:var(--ai);color:#fff;border-color:var(--ai)}
.round-btn svg{width:19px;height:19px}
.slider-panel{display:flex;flex-direction:column;justify-content:center;padding:clamp(28px,4vw,52px);border-left:1px solid var(--line);position:relative;overflow:hidden}
.slider-panel::after{content:"一心";position:absolute;right:-6px;bottom:-14px;font:600 5.5rem/1 var(--jp);color:rgba(156,54,88,.07);pointer-events:none}
.slider-panel .section-title{font-size:clamp(2.2rem,3.3vw,3.5rem)}
.slider-panel .section-title em{font-size:.82em}
.slider-panel p:last-child{color:var(--muted);max-width:340px;margin-bottom:0}

/* ---------- dojo mosaic ---------- */
.dojo{padding:clamp(88px,11vw,150px) 0;position:relative;background:var(--bg);
  background-image:repeating-linear-gradient(90deg,transparent 0 119px,rgba(87,31,51,.05) 119px 120px)}
.dojo-head{max-width:680px;margin-bottom:clamp(36px,5vw,56px)}
.dojo-head p:last-child{color:var(--muted);max-width:520px}
.mosaic{columns:3 260px;column-gap:16px}
.tile{display:block;width:100%;margin:0 0 16px;padding:0;border:0;background:var(--paper);cursor:zoom-in;break-inside:avoid;position:relative;box-shadow:var(--shadow-soft);overflow:hidden;transition:transform .5s var(--ease),box-shadow .4s ease}
.tile .media{height:auto;aspect-ratio:var(--ar,4/5)}
.tile:nth-child(5n+2) .media{aspect-ratio:var(--ar,1)}
.tile:nth-child(5n+4) .media{aspect-ratio:var(--ar,3/2)}
.tile:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.tile:hover .media img{transform:scale(1.04)}
.tile-date{position:absolute;left:12px;bottom:12px;z-index:2;padding:5px 11px;border-radius:999px;background:rgba(30,10,18,.55);color:#fbf5ea;font-size:.68rem;font-weight:700;letter-spacing:.12em;backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);opacity:0;transform:translateY(6px);transition:opacity .3s ease,transform .3s ease}
.tile:hover .tile-date,.tile:focus-visible .tile-date{opacity:1;transform:none}
.mosaic-empty{color:var(--muted);font-style:italic}

/* nút sang trang tất cả ảnh */
.archive-launch{display:flex;justify-content:center;margin-top:clamp(20px,3vw,36px)}

/* lightbox */
.lightbox{border:0;padding:0;margin:0;width:100vw;height:100svh;max-width:none;max-height:none;background:rgba(22,8,14,.92);color:#fbf5ea;display:none;place-items:center}
.lightbox[open]{display:grid;animation:lbIn .35s var(--ease)}
.lightbox::backdrop{background:transparent}
@keyframes lbIn{from{opacity:0}to{opacity:1}}
.lb-figure{margin:0;width:min(92vw,1100px);display:flex;flex-direction:column;align-items:center;gap:14px}
.lb-media{width:100%;height:min(78svh,760px);background-color:var(--ai-deep)}
.lb-media img{object-fit:contain}
.lb-media video{position:absolute;inset:0;width:100%;height:100%;object-fit:contain;background:#000}
.lb-media.has-img{background:transparent}
.lb-figure figcaption{font-size:.8rem;letter-spacing:.14em;font-weight:600;opacity:.85}
.lb-close,.lb-nav{position:fixed;z-index:2;width:48px;height:48px;border-radius:50%;border:1px solid rgba(255,255,255,.3);background:rgba(255,255,255,.1);color:#fff;display:grid;place-items:center;cursor:pointer;transition:background .25s ease}
.lb-close:hover,.lb-nav:hover{background:rgba(255,255,255,.22)}
.lb-close svg,.lb-nav svg{width:20px;height:20px}
.lb-close{top:16px;right:16px}
.lb-nav{top:50%;translate:0 -50%}
.lb-nav.prev{left:16px}.lb-nav.next{right:16px}

/* ---------- wishes ---------- */
.messages{position:relative;z-index:10;color:var(--on-ai);min-height:92svh;display:grid;grid-template-columns:minmax(0,1fr);align-items:center;overflow:hidden;
  background:
    radial-gradient(circle,rgba(243,194,205,.16) 0 1px,transparent 2px) 0 0/24px 24px,
    linear-gradient(135deg,var(--ai-deep) 0%,var(--ai) 52%,var(--ai-mid) 100%);
  transition:min-height .9s 1.9s var(--ease)}
.messages::before{content:"“";position:absolute;right:4vw;top:-80px;font:500 22rem/1 var(--serif);color:rgba(255,255,255,.045);pointer-events:none}
.messages::after{content:"";position:absolute;left:-90px;bottom:70px;width:260px;height:260px;border:1px solid rgba(255,255,255,.12);border-radius:50%;box-shadow:0 0 0 34px transparent,0 0 0 35px rgba(255,255,255,.07),0 0 0 70px transparent,0 0 0 71px rgba(255,255,255,.045);pointer-events:none}
.messages.is-open{min-height:0}

.envelope-launch{display:grid;grid-template-columns:minmax(0,1fr);grid-template-rows:1fr;min-width:0;place-items:center;padding:clamp(70px,9vw,112px) 24px;position:relative;z-index:3;transition:grid-template-rows .9s 1.9s var(--ease),padding .9s 1.9s var(--ease),opacity .7s 1.9s ease}
.envelope-launch>*{min-height:0}
.messages.is-open .envelope-launch{grid-template-rows:0fr;padding-block:0;opacity:0;pointer-events:none}
.envelope-toggle{width:min(820px,calc(100vw - 48px));border:0;background:transparent;padding:0;cursor:pointer;perspective:1500px;color:inherit}
.envelope-stage{display:block;position:relative;width:100%;aspect-ratio:1.62;transform-style:preserve-3d;transition:transform 1.05s var(--ease),filter .7s ease}
.envelope-shadow{position:absolute;left:7%;right:7%;bottom:1%;height:9%;border-radius:50%;background:rgba(14,4,8,.4);filter:blur(24px);transform:scaleX(.8);transition:transform 1s var(--ease),opacity .5s ease}
.envelope-back{position:absolute;inset:5% 2% 11%;background:var(--envelope-deep);border-radius:6px;z-index:1;box-shadow:0 32px 80px rgba(14,4,8,.4)}
.envelope-letters{position:absolute;left:8%;right:8%;top:11%;bottom:15%;z-index:2;opacity:0;transform:translateY(13%);pointer-events:none;transition:opacity .12s .38s ease,transform .82s .38s var(--ease),z-index 0s .45s}
.sheet{position:absolute;left:3%;right:3%;border:1px solid rgba(87,31,51,.12);box-shadow:0 5px 13px rgba(30,10,18,.16);transform-origin:50% 92%;will-change:transform,opacity;
  background-image:repeating-linear-gradient(180deg,transparent 0 22px,rgba(87,31,51,.08) 22px 23px)}
.sheet:nth-child(1){top:1%;bottom:19%;background-color:var(--sheet-1);transform:translateX(-5%) rotate(-5deg)}
.sheet:nth-child(2){top:6%;bottom:14%;background-color:var(--sheet-2);transform:translateX(5%) rotate(4.5deg)}
.sheet:nth-child(3){top:11%;bottom:9%;background-color:var(--sheet-3);transform:translateX(-3%) rotate(-2.5deg)}
.sheet:nth-child(4){top:16%;bottom:4%;background-color:var(--sheet-1);transform:translateX(3%) rotate(2deg)}
.sheet:nth-child(5){top:21%;bottom:-1%;background-color:var(--sheet-2);transform:translateX(-1%) rotate(-.7deg)}
.sheet:nth-child(6){top:26%;bottom:-6%;background-color:var(--sheet-3);transform:translateX(1%) rotate(.6deg)}
.envelope-front{position:absolute;inset:5% 2% 11%;background:var(--envelope);clip-path:polygon(0 0,50% 53%,100% 0,100% 100%,0 100%);z-index:4;border-radius:0 0 6px 6px;overflow:hidden}
.envelope-front::before,.envelope-front::after{content:"";position:absolute;inset:0}
.envelope-front::before{background:var(--envelope-fold);clip-path:polygon(0 0,50% 53%,0 100%)}
.envelope-front::after{background:color-mix(in srgb,var(--envelope) 80%,#fff);clip-path:polygon(100% 0,50% 53%,100% 100%)}
.envelope-flap{position:absolute;left:2%;right:2%;top:5%;height:53%;background:var(--envelope-deep);clip-path:polygon(0 0,100% 0,50% 100%);transform-origin:50% 0;z-index:5;transition:transform .82s .2s var(--ease),z-index 0s .58s}
.envelope-seal{position:absolute;left:50%;top:50%;translate:-50% -50%;width:clamp(70px,9vw,100px);aspect-ratio:1;border-radius:50%;display:grid;place-items:center;background:var(--shu);color:var(--on-shu);z-index:6;box-shadow:0 12px 28px rgba(50,12,26,.38),inset 0 0 0 7px rgba(255,255,255,.1);transition:transform .42s ease,opacity .26s .12s ease}
.envelope-seal::before{content:"";position:absolute;inset:9px;border:1px solid rgba(255,246,234,.45);border-radius:50%}
.envelope-seal img{width:74%;height:74%;object-fit:contain;border-radius:50%;background:#fff6ea;padding:4%}
.envelope-instruction{position:absolute;left:50%;bottom:18%;translate:-50% 0;z-index:7;display:inline-flex;align-items:center;gap:10px;font-size:clamp(.74rem,1.2vw,.9rem);font-weight:600;color:#fbf5ea;background:var(--ai);padding:11px 18px;border-radius:999px;box-shadow:0 9px 24px rgba(14,4,8,.3);white-space:nowrap;transition:transform .3s ease,background .25s ease,opacity .3s ease}
.envelope-instruction svg{width:16px;height:16px;flex:none;animation:nudge 1.6s ease-in-out infinite}
@keyframes nudge{50%{transform:translateY(3px)}}
.envelope-toggle:hover:not(.is-open) .envelope-stage{transform:translateY(-8px) rotateX(1deg)}
.envelope-toggle:hover .envelope-instruction,.envelope-toggle:focus-visible .envelope-instruction{background:var(--shu);color:var(--on-shu);transform:translateY(-3px)}
.envelope-toggle:focus-visible{outline:2px solid var(--on-ai-accent);outline-offset:12px}
.envelope-toggle.is-open{cursor:default}
.envelope-toggle.is-open .envelope-stage{transform:scale(1.15) translateY(2%)}
.envelope-toggle.is-open .envelope-flap{transform:rotateX(-180deg);z-index:1}
.envelope-toggle.is-open .envelope-letters{opacity:1;transform:translateY(-13%);z-index:8}
.envelope-toggle.is-open .sheet:nth-child(1){animation:fly1 1.12s .46s cubic-bezier(.18,.78,.25,1) forwards}
.envelope-toggle.is-open .sheet:nth-child(2){animation:fly2 1.18s .53s cubic-bezier(.18,.78,.25,1) forwards}
.envelope-toggle.is-open .sheet:nth-child(3){animation:fly3 1.12s .6s cubic-bezier(.18,.78,.25,1) forwards}
.envelope-toggle.is-open .sheet:nth-child(4){animation:fly4 1.2s .67s cubic-bezier(.18,.78,.25,1) forwards}
.envelope-toggle.is-open .sheet:nth-child(5){animation:fly5 1.16s .74s cubic-bezier(.18,.78,.25,1) forwards}
.envelope-toggle.is-open .sheet:nth-child(6){animation:fly6 1.22s .81s cubic-bezier(.18,.78,.25,1) forwards}
@keyframes fly1{0%{opacity:1;transform:translate3d(-5%,0,0) rotate(-5deg)}55%{opacity:.95;transform:translate3d(-32%,-118%,0) rotate(-16deg) scale(1.04)}100%{opacity:0;transform:translate3d(-48%,-220%,0) rotate(-27deg) scale(.82)}}
@keyframes fly2{0%{opacity:1;transform:translate3d(5%,0,0) rotate(4.5deg)}55%{opacity:.95;transform:translate3d(29%,-128%,0) rotate(14deg) scale(1.05)}100%{opacity:0;transform:translate3d(45%,-230%,0) rotate(25deg) scale(.8)}}
@keyframes fly3{0%{opacity:1;transform:translate3d(-3%,0,0) rotate(-2.5deg)}55%{opacity:.95;transform:translate3d(-14%,-136%,0) rotate(-8deg) scale(1.06)}100%{opacity:0;transform:translate3d(-22%,-246%,0) rotate(-16deg) scale(.84)}}
@keyframes fly4{0%{opacity:1;transform:translate3d(3%,0,0) rotate(2deg)}55%{opacity:.95;transform:translate3d(18%,-116%,0) rotate(9deg) scale(1.04)}100%{opacity:0;transform:translate3d(31%,-214%,0) rotate(19deg) scale(.8)}}
@keyframes fly5{0%{opacity:1;transform:translate3d(-1%,0,0) rotate(-.7deg)}55%{opacity:.95;transform:translate3d(-25%,-122%,0) rotate(-11deg) scale(1.04)}100%{opacity:0;transform:translate3d(-38%,-226%,0) rotate(-21deg) scale(.78)}}
@keyframes fly6{0%{opacity:1;transform:translate3d(1%,0,0) rotate(.6deg)}55%{opacity:.95;transform:translate3d(9%,-132%,0) rotate(7deg) scale(1.05)}100%{opacity:0;transform:translate3d(18%,-240%,0) rotate(15deg) scale(.8)}}
.envelope-toggle.is-open .envelope-seal{transform:scale(.45) rotate(-18deg);opacity:0}
.envelope-toggle.is-open .envelope-shadow{transform:scaleX(1.14);opacity:.55}
.envelope-toggle.is-open .envelope-instruction{opacity:0;transform:translateY(-12px)}

.wish-reveal{display:grid;grid-template-columns:minmax(0,1fr);grid-template-rows:0fr;min-width:0;opacity:0;visibility:hidden;transition:grid-template-rows .95s var(--ease),opacity .5s ease,visibility 0s .95s}
.wish-reveal.open{grid-template-rows:1fr;opacity:1;visibility:visible;transition:grid-template-rows .95s 1.38s var(--ease),opacity .65s 1.5s ease,visibility 0s}
.wish-reveal-inner{min-height:0;min-width:0;overflow:hidden}
.wish-reveal.open .wish-reveal-inner{overflow:visible;padding:clamp(80px,9vw,120px) 0 clamp(56px,7vw,90px)}
.messages-head{text-align:center;max-width:820px;margin:0 auto 38px;padding:0 20px}
.messages-head .eyebrow{color:var(--on-ai-accent)}
.messages-head h2{font:500 clamp(2.1rem,4.6vw,4.4rem)/1.08 var(--serif);letter-spacing:-.025em;margin:6px 0 0}
.messages-head h2 em{color:var(--on-ai-accent);font-weight:500}
.messages-head::after{content:"";display:block;width:70px;height:1px;background:var(--on-ai-accent);margin:24px auto 0}

.message-rail{position:relative;width:100%}
.message-lane{overflow-x:auto;overflow-y:hidden;scrollbar-width:none;cursor:grab;touch-action:pan-x pan-y;overscroll-behavior-x:contain;
  mask-image:linear-gradient(90deg,transparent 0,#000 7%,#000 93%,transparent 100%);-webkit-mask-image:linear-gradient(90deg,transparent 0,#000 7%,#000 93%,transparent 100%)}
.message-lane::-webkit-scrollbar{display:none}
.message-lane.is-dragging{cursor:grabbing;user-select:none}
.message-lane.is-dragging .message-card{pointer-events:none}
.message-lane:focus-visible{outline:2px solid var(--on-ai-accent);outline-offset:-4px}
.message-track{display:flex;width:max-content;gap:22px;padding:16px max(7vw,28px) 34px}
.message-card{position:relative;flex:none;width:clamp(272px,32vw,410px);min-height:220px;margin:0;padding:38px 32px 28px;background:var(--card-1);color:var(--card-ink);box-shadow:0 22px 55px rgba(14,4,8,.32);display:flex;flex-direction:column;justify-content:space-between;
  clip-path:polygon(0 0,calc(100% - 22px) 0,100% 22px,100% 100%,0 100%);transition:transform .45s var(--ease),box-shadow .35s ease}
.message-card::before{content:"“";position:absolute;right:18px;top:-18px;font:500 7rem/1 var(--serif);color:rgba(156,54,88,.12)}
.message-card::after{content:"";position:absolute;left:0;top:0;bottom:0;width:6px;background:var(--shu)}
.message-card:nth-child(2n){background:var(--card-2);transform:translateY(16px)}
.message-card:nth-child(2n)::after{background:var(--ai)}
.message-card:nth-child(4n+3){background:var(--card-3)}
.message-card:nth-child(4n+3)::after{background:var(--gold)}
.message-card:hover{transform:translateY(-8px) rotate(-.6deg)}
.message-card.is-new{animation:cardIn .9s var(--ease) both}
@keyframes cardIn{0%{opacity:0;transform:translateY(30px) scale(.94)}60%{box-shadow:0 0 0 4px var(--on-ai-accent),0 22px 55px rgba(14,4,8,.32)}100%{opacity:1;transform:none}}
.message-card blockquote{position:relative;z-index:1;font:500 clamp(1.05rem,1.55vw,1.28rem)/1.5 var(--serif);margin:0 0 22px;overflow-wrap:anywhere}
.message-card .to{font-size:.72rem;font-weight:600;letter-spacing:.12em;text-transform:uppercase;color:#7a4f5c;margin:0 0 10px}
.message-card footer{display:flex;align-items:center;gap:10px;color:#8e2f4f;font-size:.78rem;font-weight:600;letter-spacing:.03em}
.message-card footer::before{content:"";width:26px;height:1px;background:currentColor;flex:none}
.message-card .local-tag{margin-left:auto;font-size:.64rem;letter-spacing:.1em;text-transform:uppercase;color:#6a5560;font-weight:600}
.message-card .local-tag.is-pending{color:#9c3658}
/* thẻ chỉ hiện vài dòng, bấm để xem đầy đủ */
.message-card{cursor:pointer}
.message-lane.is-dragging .message-card{cursor:grabbing}
.message-card:focus-visible{outline:3px solid var(--on-ai-accent);outline-offset:3px}
.message-card blockquote{display:-webkit-box;-webkit-box-orient:vertical;-webkit-line-clamp:6;line-clamp:6;overflow:hidden;white-space:pre-line}
.message-card .more{display:none;position:relative;z-index:1;margin:-12px 0 18px;font-size:.74rem;font-weight:600;letter-spacing:.06em;color:#8e2f4f;text-decoration:underline;text-underline-offset:3px}
.message-card.is-clamped .more{display:block}

/* popup lời chúc */
.wish-dialog{border:0;padding:0;margin:auto;width:min(640px,calc(100vw - 32px));max-height:min(86svh,820px);background:transparent;color:var(--ink);overflow:visible}
.wish-dialog[open]{animation:lbIn .3s var(--ease)}
.wish-dialog::backdrop{background:rgba(22,8,14,.72);backdrop-filter:blur(3px);-webkit-backdrop-filter:blur(3px)}
.wish-dialog-card{position:relative;max-height:min(86svh,820px);overflow:auto;background:var(--paper);color:var(--ink);padding:clamp(40px,6vw,58px) clamp(22px,5vw,52px) clamp(26px,4vw,40px);box-shadow:var(--shadow);border-left:6px solid var(--shu)}
.wish-dialog-card::before{content:"“";position:absolute;right:56px;top:-6px;font:500 7rem/1 var(--serif);color:var(--shu);opacity:.14;pointer-events:none}
.wish-dialog .to{font-size:.72rem;font-weight:600;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);margin:0 0 12px}
.wish-dialog blockquote{margin:0 0 26px;font:500 clamp(1.08rem,2.2vw,1.32rem)/1.6 var(--serif);white-space:pre-line;overflow-wrap:anywhere}
.wish-dialog footer{display:flex;flex-wrap:wrap;align-items:center;gap:10px;color:var(--shu);font-size:.82rem;font-weight:600}
.wish-dialog footer::before{content:"";width:26px;height:1px;background:currentColor;flex:none}
.wish-dialog .local-tag{margin-left:auto;font-size:.64rem;letter-spacing:.1em;text-transform:uppercase;color:var(--muted)}
.wish-dialog .local-tag:empty{display:none}
.wish-dialog-close{position:absolute;top:10px;right:10px;width:42px;height:42px;border-radius:50%;border:1px solid var(--line);background:transparent;color:var(--ink);display:grid;place-items:center;cursor:pointer;transition:background .25s ease}
.wish-dialog-close:hover{background:var(--shu-soft)}
.wish-dialog-close:focus-visible{outline:2px solid var(--shu);outline-offset:2px}
.wish-dialog-close svg{width:18px;height:18px}
.visually-hidden,.hp-field{position:absolute!important;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
.hp-field{left:-9999px}
.share-action[disabled]{opacity:.65;cursor:progress}
.rail-arrow{position:absolute;top:50%;z-index:4;translate:0 -60%;width:48px;height:48px;border-radius:50%;border:1px solid rgba(255,255,255,.4);background:rgba(255,255,255,.12);color:#fff;display:grid;place-items:center;cursor:pointer;backdrop-filter:blur(7px);-webkit-backdrop-filter:blur(7px);transition:background .25s ease,opacity .25s ease}
.rail-arrow:hover{background:rgba(255,255,255,.25)}
.rail-arrow svg{width:21px;height:21px}
.rail-arrow.prev{left:max(12px,2vw)}.rail-arrow.next{right:max(12px,2vw)}

.compose-launch{display:flex;justify-content:center;padding:34px 24px 0}
.compose-toggle{display:inline-flex;align-items:center;justify-content:center;gap:12px;max-width:100%;padding:17px 26px;border:1px solid rgba(255,255,255,.35);border-radius:4px;background:var(--envelope);color:var(--ai-deep);font-weight:600;cursor:pointer;box-shadow:10px 10px 0 rgba(243,194,205,.2),0 15px 35px rgba(14,4,8,.25);transition:transform .3s var(--ease),box-shadow .3s ease}
.compose-toggle:hover{transform:translateY(-4px);box-shadow:13px 15px 0 rgba(243,194,205,.24),0 18px 40px rgba(14,4,8,.3)}
.compose-toggle svg{width:18px;height:18px;flex:none;transition:transform .45s var(--ease)}
.compose-toggle[aria-expanded="true"] svg{transform:rotate(45deg)}

.compose{display:grid;grid-template-columns:minmax(0,1fr);grid-template-rows:0fr;opacity:0;transition:grid-template-rows .65s var(--ease),opacity .35s ease}
.compose.open{grid-template-rows:1fr;opacity:1}
.compose-inner{min-height:0;overflow:hidden}
.compose-grid{display:grid;grid-template-columns:.8fr 1.2fr;gap:clamp(32px,7vw,96px);align-items:start;padding:clamp(48px,6vw,80px) 0 8px}
.compose-copy{color:var(--on-ai);min-width:0}
.compose-copy::before{content:"";display:block;width:48px;height:6px;background:var(--shu);margin-bottom:26px}
.compose-copy .eyebrow{color:var(--on-ai-accent)}
.compose-copy .section-title em{color:var(--on-ai-accent)}
.compose-copy p:last-child{color:var(--on-ai-muted);max-width:420px}
.compose-panel{position:relative;background:var(--paper);color:var(--ink);padding:clamp(24px,4vw,46px);box-shadow:16px 18px 0 rgba(243,194,205,.22),var(--shadow);transform:rotate(.35deg);min-width:0}
.compose-panel::after{content:"";position:absolute;width:92px;height:26px;left:50%;top:-12px;translate:-50% 0;background:rgba(156,54,88,.5);transform:rotate(-2deg)}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.field{position:relative;margin-bottom:18px;background:color-mix(in srgb,var(--bg) 70%,transparent);padding:12px 16px 8px;border-left:3px solid var(--shu)}
.form-row .field:nth-child(2){border-left-color:var(--ai-mid)}
label{display:block;font-size:.78rem;font-weight:600;margin-bottom:6px;color:var(--muted)}
.optional-note{font-weight:400;opacity:.7}
input,textarea{width:100%;border:0;border-bottom:1px solid var(--line);background:transparent;color:var(--ink);padding:9px 2px;outline:none;border-radius:0}
input:focus,textarea:focus{border-bottom-color:var(--shu)}
textarea{min-height:124px;resize:vertical}
.field.invalid{border-left-color:var(--beni);box-shadow:inset 0 0 0 1px var(--beni)}
.field-head{display:flex;align-items:center;justify-content:space-between;gap:12px}
.suggest-btn{border:1px solid var(--line);background:transparent;color:var(--shu);font:600 .78rem/1 var(--sans);padding:6px 12px;border-radius:999px;cursor:pointer}
.suggest-btn:hover{border-color:var(--shu)}
.ai-note{margin:10px 0 0;padding:6px 10px;border-radius:8px;background:#fff1d6;color:#7a4a00;font-size:.74rem;font-weight:600;line-height:1.4}
.ai-note[hidden]{display:none}
.message-empty{display:grid;place-items:center;text-align:center;color:var(--muted);font-style:italic}
.char-count{display:block;text-align:right;font-size:.7rem;color:var(--muted);margin-top:4px;font-variant-numeric:tabular-nums}
.share-action{width:100%;padding-block:16px;margin-top:4px}
.hint{font-size:.76rem;color:var(--muted);margin:14px 0 0}

/* ---------- closing ---------- */
.closing{min-height:92svh;position:relative;display:grid;align-items:end;color:#fbf5ea;overflow:hidden;background:var(--ai-deep)}
.closing-media{position:absolute;inset:0}
.closing-media img{transform:scale(1.08);transition:transform 1.6s var(--ease),opacity .6s ease}
.closing.in-view .closing-media img{transform:scale(1.02)}
.closing::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(30,10,18,.05),rgba(30,10,18,.7) 62%,rgba(36,12,22,.96));pointer-events:none}
.closing-copy{position:relative;z-index:2;text-align:center;padding:120px 0 78px}
.closing-copy::before{content:"";display:block;width:64px;height:2px;background:var(--on-ai-accent);margin:0 auto 24px}
.closing .eyebrow{color:var(--on-ai-accent)}
.closing h2{font:500 clamp(2.1rem,5.2vw,5rem)/1.02 var(--serif);letter-spacing:-.035em;margin:0 auto 22px;max-width:950px}
.closing h2 em{color:var(--on-ai-accent);font-weight:500}
.closing p{max-width:640px;margin:0 auto;color:#efe7da;font-size:clamp(.95rem,1.3vw,1.1rem)}
.closing .closing-sign{margin-top:28px;font-size:.72rem;letter-spacing:.2em;text-transform:uppercase;font-weight:600;color:var(--on-ai-accent)}

/* ---------- toast ---------- */
.toast{position:fixed;left:50%;bottom:24px;z-index:60;max-width:calc(100vw - 32px);transform:translate(-50%,20px);background:var(--ai-deep);color:#fbf5ea;padding:11px 18px;border-radius:999px;box-shadow:var(--shadow);opacity:0;pointer-events:none;transition:.3s ease;font-size:.85rem;text-align:center}
.toast.show{opacity:1;transform:translate(-50%,0)}

/* ---------- reveal on scroll (only when JS + motion allowed) ---------- */
.motion .reveal{transition:opacity .8s ease,transform 1.05s var(--ease),filter .8s ease}
.motion .reveal:not(.in){opacity:0;transform:translateY(46px);filter:blur(6px)}
.motion .tile{transition:opacity .7s ease,transform .9s var(--ease),box-shadow .4s ease}
.motion .tile:not(.in){opacity:0;transform:translateY(30px)}

/* ---------- responsive ---------- */
@media (max-width:900px){
  .wrap{width:min(100% - 32px,720px)}
  .hero{padding-top:104px;background:linear-gradient(180deg,var(--shu-soft),var(--bg))}
  .hero-texture{display:none}
  .hero-grid{grid-template-columns:1fr}
  .hero-copy{padding-bottom:64px}
  .hero-copy::before{content:"";position:absolute;z-index:-1;top:-200px;bottom:0;left:-50vw;right:-50vw;
    background:repeating-linear-gradient(45deg,rgba(255,255,255,.03) 0 2px,transparent 2px 12px),linear-gradient(180deg,var(--ai-deep),var(--ai));
    clip-path:polygon(0 0,100% 0,100% calc(100% - 48px),0 100%);box-shadow:none}
  .hero-copy::after{content:"";position:absolute;z-index:-2;bottom:-6px;left:-50vw;right:-50vw;height:60px;background:var(--shu-light);clip-path:polygon(0 80%,100% 0,100% 12%,0 100%)}
  .hero-photo{height:min(120vw,620px);min-height:0}
  .slider-shell{grid-template-columns:1fr}
  .slider-panel{border-left:0;border-top:1px solid var(--line);order:-1}
  .compose-grid{grid-template-columns:1fr}
}
@media (max-width:760px){
  .site-nav{grid-template-columns:minmax(0,1fr) auto;padding:8px 12px 8px 14px;gap:0 12px}
  .nav-links{display:none}
  .nav-burger{display:block}
  .mobile-nav{padding-top:8px}
  .rail-arrow{display:none}
  .message-track{gap:16px;padding-inline:20px}
  .form-row{grid-template-columns:1fr;gap:0}
  .compose-panel{transform:none;box-shadow:8px 10px 0 rgba(243,194,205,.22),var(--shadow-soft)}
  .envelope-toggle{width:calc(100vw - 24px)}
  .envelope-launch{padding-inline:12px}
  .envelope-stage{aspect-ratio:1.25}
  .envelope-back,.envelope-front{inset:10% 1% 12%}
  .envelope-flap{left:1%;right:1%;top:10%;height:49%}
  .envelope-letters{left:5%;right:5%;top:15%;bottom:16%}
  .envelope-seal{top:52%;width:66px}
  .envelope-instruction{bottom:19%;padding:9px 14px;font-size:.72rem}
  .lb-nav{top:auto;bottom:18px;translate:none}
  .lb-media{height:70svh}
}
@media (max-width:480px){
  .wrap{width:calc(100% - 32px)}
  h1{font-size:clamp(2.9rem,15vw,3.6rem)}
  .nav-title{font-size:.66rem}
  .countdown-units{gap:5px}
  .countdown-unit{min-width:0;flex:1;padding:10px 4px 8px}
  .countdown-unit strong{font-size:1.45rem}
  .countdown-sep{font-size:1rem}
  .hero-cta{width:100%}
  .hero-photo{height:440px}
  .polaroid{padding:6px 6px 36px}
  .polaroid figcaption{font-size:.85rem;bottom:9px;left:10px}
  .polaroid.main{width:88%;height:68%;right:0}
  .polaroid.small{width:60%;height:42%}
  .seal{width:92px;font-size:.5rem}
  .seal em{font-size:.62rem}
  .seal strong{font-size:1.4rem}
  .slider-viewport{min-height:0}
  .slider-bottom{gap:16px}
  .mosaic{columns:2;column-gap:10px}
  .tile{margin-bottom:10px}
  .tile-date{opacity:1;transform:none;font-size:.6rem;left:8px;bottom:8px;padding:4px 8px}
  .message-card{width:min(82vw,300px);padding:34px 24px 24px;min-height:200px}
  .compose-toggle{width:100%;padding:15px 18px;font-size:.92rem}
  .closing{min-height:80svh}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.01ms!important;animation-delay:0s!important;animation-iteration-count:1!important;transition-duration:.01ms!important;transition-delay:0s!important}
  .petal-field{display:none}
  .hero-line>span{transform:none}
  .polaroid{clip-path:none}
  .envelope-toggle.is-open .sheet{animation:none!important;opacity:0}
}

/* ---------- trang tất cả ảnh (tat-ca.html) ---------- */
.all-bar{position:sticky;top:0;z-index:20;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:10px max(16px,calc((100vw - 1160px)/2));background:color-mix(in srgb,var(--paper) 86%,transparent);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.all-brand{display:flex;align-items:center;gap:10px;color:var(--ink);text-decoration:none;min-width:0}
.all-brand img{width:32px;height:32px;flex:none;border-radius:50%;background:#fff6ea;padding:2px;object-fit:contain;box-shadow:0 2px 8px rgba(0,0,0,.18)}
.all-brand strong{font:600 1.05rem/1 var(--serif);letter-spacing:.06em}
.all-brand span{font-size:.78rem;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.all-back{display:inline-flex;align-items:center;gap:8px;flex:none;color:var(--shu);font-weight:600;font-size:.9rem;text-decoration:none}
.all-back svg{width:18px;height:18px}
.all-back:hover{color:var(--shu-hover)}
.all-main{padding:clamp(40px,6vw,72px) 0 96px}
.all-head{margin-bottom:24px}
.all-count{color:var(--muted);margin:0}
.all-filters{display:inline-flex;margin-bottom:16px;border:1px solid var(--line);border-radius:999px;padding:3px;background:var(--paper)}
.all-filters button{border:0;background:none;color:var(--muted);font:600 .85rem/1 var(--sans);padding:9px 16px;border-radius:999px;cursor:pointer}
.all-filters button[aria-pressed="true"]{background:var(--shu);color:var(--on-shu)}
.all-months{position:sticky;top:57px;z-index:10;display:flex;gap:6px;overflow-x:auto;padding:10px 0;margin-bottom:12px;background:var(--bg);scrollbar-width:none}
.all-months::-webkit-scrollbar{display:none}
.all-months a{flex:none;padding:6px 12px;border-radius:999px;border:1px solid var(--line);color:var(--ink);font-size:.8rem;font-weight:600;text-decoration:none;white-space:nowrap}
.all-months a:hover{border-color:var(--shu);color:var(--shu)}
.archive-month{scroll-margin-top:120px}
.archive-month+.archive-month{margin-top:36px}
.archive-month h2{display:flex;align-items:baseline;gap:12px;margin:0 0 14px;padding-bottom:10px;border-bottom:1px solid var(--line);font:500 1.45rem/1.2 var(--serif)}
.archive-month h2 span{font:600 .7rem/1 var(--sans);letter-spacing:.14em;text-transform:uppercase;color:var(--muted)}
.archive-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:8px}
.archive-tile{position:relative;display:block;padding:0;border:0;background:var(--paper);cursor:zoom-in;overflow:hidden;aspect-ratio:1}
.archive-tile .media{height:100%}
.archive-tile .media::after{display:none}
.archive-tile:hover .media img{transform:scale(1.05)}
.archive-tile.is-video{cursor:pointer}
.archive-play{position:absolute;left:50%;top:50%;width:46px;height:46px;translate:-50% -50%;border-radius:50%;background:rgba(30,10,18,.55);backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px);box-shadow:0 0 0 2px rgba(255,255,255,.7)}
.archive-play::after{content:"";position:absolute;left:18px;top:14px;border-style:solid;border-width:9px 0 9px 15px;border-color:transparent transparent transparent #fff}
@media (max-width:600px){
  .all-brand span{display:none}
  .archive-grid{grid-template-columns:repeat(3,1fr);gap:4px}
  .all-months{top:53px}
}