/* Màu: đỏ đô (màu trường) – vàng kim kỷ niệm – nền đêm ấm cho ảnh nổi bật */
:root{
  --bg:#140f10; --bg2:#1d1517; --line:#3a2b2e; --ink:#f6efe6; --muted:#b9aaa2;
  --wine:#7a1426; --wine2:#a3203a; --gold:#e3bf68; --gold2:#c9a24a;
  --r:14px; --font:"Be Vietnam Pro",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
}
*{box-sizing:border-box;min-width:0}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.55 var(--font);overflow-x:clip;-webkit-font-smoothing:antialiased}
a{color:inherit}
img{display:block;max-width:100%}
button{font:inherit;color:inherit}
.boot{min-height:100vh;display:grid;place-items:center;color:var(--muted)}
.muted{color:var(--muted)}
.wrap{max-width:1280px;margin:0 auto;padding:0 max(4vw,16px)}

/* Nút */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:48px;padding:0 24px;border-radius:999px;border:1px solid transparent;font-weight:600;cursor:pointer;text-decoration:none;transition:transform .15s,background .2s}
.btn:active{transform:scale(.97)}
.btn:focus-visible,.lb-btn:focus-visible,.tab:focus-visible,.card:focus-visible,.ph:focus-visible{outline:3px solid var(--gold);outline-offset:3px}
.btn.gold{background:var(--gold);color:#2a1a0c}
.btn.gold:hover{background:#ecd08a}
.btn.ghost{border-color:#ffffff40;background:#ffffff0d}
.btn.ghost:hover{background:#ffffff1f}
.btn.sm{min-height:40px;padding:0 18px;font-size:14px}

/* Hero */
.hero{position:relative;min-height:min(100svh,920px);display:grid;place-items:center;text-align:center;overflow:hidden;isolation:isolate;padding:96px 20px 120px}
.hero .bgimg{position:absolute;inset:0;z-index:-2;background:center/cover no-repeat;transform:scale(1.06);filter:blur(2px) brightness(.45)}
.hero::after{content:"";position:absolute;inset:0;z-index:-1;background:radial-gradient(120% 80% at 50% 30%,#7a142655,transparent 60%),linear-gradient(180deg,#140f1066 0%,#140f10 96%)}
.hero:not(.home) .scrolldown{bottom:104px}
.hero.home .bgimg{filter:blur(6px) brightness(.35)}
.eyebrow{font-size:13px;font-weight:600;color:var(--gold);letter-spacing:.06em;margin:0 0 18px}
.hero h1{font-size:clamp(32px,6vw,64px);line-height:1.08;font-weight:800;margin:0 auto 18px;max-width:16ch;text-wrap:balance}
.hero .meta{color:#e7dcd2cc;font-size:clamp(16px,2vw,19px);margin:0 0 34px}
.hero .actions{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.seal{width:116px;height:116px;margin:0 auto 22px;color:var(--gold)}
.scrolldown{position:absolute;left:50%;bottom:28px;transform:translateX(-50%);display:flex;flex-direction:column;align-items:center;gap:10px;font-size:13px;color:#ffffffb3;text-decoration:none}
.scrolldown i{width:26px;height:42px;border:2px solid #ffffff80;border-radius:14px;position:relative}
.scrolldown i::after{content:"";position:absolute;left:50%;top:8px;width:4px;height:8px;margin-left:-2px;border-radius:2px;background:var(--gold);animation:dot 1.8s infinite}
@keyframes dot{0%{opacity:0;transform:translateY(0)}40%{opacity:1}100%{opacity:0;transform:translateY(14px)}}

/* Lưới album */
.section{padding:56px 0 120px}
.section h2{font-size:clamp(26px,3.4vw,36px);line-height:1.1;margin:0 0 6px}
.section .sub{color:var(--muted);margin:0 0 28px}
.albums{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(100%,300px),1fr));gap:22px}
.card{display:block;text-decoration:none;border-radius:var(--r);overflow:hidden;background:var(--bg2);border:1px solid var(--line);transition:transform .2s,border-color .2s}
.card:hover{transform:translateY(-3px);border-color:var(--gold2)}
.card .thumb{aspect-ratio:4/3;background:#2a1f21 center/cover no-repeat}
.card .body{padding:16px 18px 18px}
.card h3{margin:0 0 4px;font-size:18px;line-height:1.3}
.card p{margin:0;color:var(--muted);font-size:14px}
.empty{padding:60px 20px;text-align:center;color:var(--muted);border:1px dashed var(--line);border-radius:var(--r)}

/* Thanh lọc + lưới ảnh */
.toolbar{position:sticky;top:0;z-index:5;background:#140f10e6;backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.toolbar .wrap{display:flex;align-items:center;gap:10px;min-height:62px;flex-wrap:wrap}
.back{text-decoration:none;color:var(--muted);font-size:14px;margin-right:auto;padding:10px 0}
.back:hover{color:var(--ink)}
.tab{border:1px solid var(--line);background:transparent;border-radius:999px;min-height:40px;padding:0 16px;cursor:pointer;font-size:14px;font-weight:600;color:var(--muted)}
.tab[aria-pressed=true]{background:var(--ink);color:var(--bg);border-color:var(--ink)}
.grid{columns:4 260px;column-gap:10px;padding:18px 0 140px}
.ph{display:block;width:100%;margin:0 0 10px;break-inside:avoid;border:0;padding:0;background:#2a1f21;border-radius:8px;overflow:hidden;cursor:zoom-in;position:relative}
.ph img{width:100%;height:auto;opacity:0;transition:opacity .4s}
.ph img.on{opacity:1}
.ph .score{position:absolute;left:8px;top:8px;background:#000000a0;color:var(--gold);font-size:12px;font-weight:700;padding:3px 9px;border-radius:999px}
.mehead{display:flex;align-items:center;gap:14px;flex-wrap:wrap;padding:22px 0 0}
.mehead p{margin:0;color:var(--muted)}
.more{height:1px}

/* Nút tìm bằng mặt cố định */
.findbar{position:fixed;left:0;right:0;bottom:0;z-index:20;padding:12px max(4vw,12px) calc(12px + env(safe-area-inset-bottom));background:linear-gradient(0deg,#140f10 40%,#140f1000)}
.findbar .btn{width:min(680px,100%);margin:0 auto;display:flex;min-height:56px;font-size:17px;box-shadow:0 10px 30px #0008}

/* Hộp thoại */
.modal{position:fixed;inset:0;z-index:50;background:#000b;display:grid;place-items:center;padding:16px}
.modal[hidden],.lightbox[hidden],.step[hidden]{display:none}
.sheet{position:relative;width:min(460px,100%);background:var(--bg2);border:1px solid var(--line);border-radius:22px;padding:34px 26px 26px;text-align:center;max-height:92vh;overflow:auto}
.sheet h2{margin:0 0 10px;font-size:26px;line-height:1.15}
.sheet .actions{display:flex;flex-direction:column;gap:10px;margin:22px 0 0}
.sheet .note{font-size:13px;color:var(--muted);margin:18px 0 0}
.x{position:absolute;right:10px;top:8px;width:44px;height:44px;border:0;background:none;font-size:30px;color:var(--muted);cursor:pointer}
.faceicon{width:76px;height:76px;margin:0 auto 14px;color:var(--gold)}
.cam{position:relative;border-radius:16px;overflow:hidden;background:#000;aspect-ratio:3/4}
.cam video{width:100%;height:100%;object-fit:cover;transform:scaleX(-1)}
.oval{position:absolute;left:50%;top:46%;width:58%;height:62%;transform:translate(-50%,-50%);border:3px dashed #e3bf68cc;border-radius:50%;box-shadow:0 0 0 999px #0006}
.spinner{width:52px;height:52px;margin:20px auto;border:4px solid #ffffff26;border-top-color:var(--gold);border-radius:50%;animation:spin 1s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

/* Lightbox */
.lightbox{position:fixed;inset:0;z-index:60;background:#0a0708f5;display:grid;place-items:center}
.lightbox img{max-width:96vw;max-height:calc(100svh - 120px);object-fit:contain;border-radius:4px}
.lb-btn{position:absolute;width:48px;height:48px;border-radius:50%;border:0;background:#ffffff1a;font-size:30px;line-height:1;cursor:pointer}
.lb-btn:hover{background:#ffffff33}
.lb-x{right:14px;top:14px}
.lb-prev{left:14px;top:50%;transform:translateY(-50%)}
.lb-next{right:14px;top:50%;transform:translateY(-50%)}
.lb-bar{position:absolute;left:0;right:0;bottom:0;display:flex;justify-content:center;align-items:center;gap:18px;padding:14px 14px calc(14px + env(safe-area-inset-bottom));color:var(--muted);font-size:14px}

footer{border-top:1px solid var(--line);padding:30px 0 120px;color:var(--muted);font-size:14px;text-align:center}

@media (max-width:600px){
  .grid{columns:2;column-gap:6px}.ph{margin-bottom:6px;border-radius:6px}
  .lb-prev,.lb-next{top:auto;bottom:70px;transform:none}
  .hero{padding-top:72px}
}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}html{scroll-behavior:auto}}