:root{
  --bg:#ffffff; --bg-alt:#f4f3f0; --dark:#141414; --dark-2:#1d1d1d;
  --ink:#1a1a1a; --muted:#8a8a8a; --muted-light:#a9a9a9; --line:#e7e5e0; --line-dark:#2c2c2c;
  --serif:'Playfair Display', Georgia, serif; --sans:'Be Vietnam Pro', system-ui, sans-serif; --maxw:1180px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--sans);color:var(--ink);background:var(--bg);line-height:1.6;-webkit-font-smoothing:antialiased}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 28px}
.label{font-size:11px;letter-spacing:.28em;text-transform:uppercase;color:var(--muted);font-weight:600}
.serif{font-family:var(--serif)}

/* NAV */
.nav{position:fixed;top:0;left:0;right:0;z-index:50;display:flex;align-items:center;justify-content:space-between;padding:18px 28px;mix-blend-mode:difference;color:#fff}
.nav .brand{font-family:var(--serif);font-size:20px;font-weight:600;letter-spacing:.02em}
.nav .menu{display:flex;gap:30px;font-size:13px;letter-spacing:.05em}
.nav .menu a{opacity:.85;transition:opacity .2s}
.nav .menu a:hover{opacity:1}
@media(max-width:760px){.nav .menu{display:none}}

/* HERO */
.hero{position:relative;height:100vh;min-height:620px;display:flex;align-items:flex-end;background:#3a3f33;overflow:hidden}
.hero img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:0;transform:scale(1.04);transition:opacity 1.4s ease}
.hero img.loaded{opacity:1;animation:heroZoom 26s ease-in-out 1.4s infinite alternate}
@keyframes heroZoom{from{transform:scale(1.04)}to{transform:scale(1.13)}}
.hero::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(0,0,0,.25) 0%,rgba(0,0,0,0) 35%,rgba(0,0,0,.55) 100%)}
.hero .inner{position:relative;z-index:2;color:#fff;padding-bottom:64px}
.hero .eyebrow{font-size:11px;letter-spacing:.3em;text-transform:uppercase;opacity:.8;margin-bottom:18px}
.hero h1{font-family:var(--serif);font-weight:600;font-size:clamp(48px,9vw,104px);line-height:.98;margin-bottom:18px}
.hero p{max-width:430px;font-size:15px;opacity:.9;font-weight:300}

/* ABOUT */
.about{padding:100px 0}
.about .grid{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center}
.about h2{font-family:var(--serif);font-size:clamp(28px,4vw,40px);line-height:1.18;margin:18px 0 26px;font-weight:600}
.about h2 em{font-style:italic;font-weight:500}
.about #aboutText p{color:#555;font-size:15px;margin-bottom:16px;max-width:430px}
.stats{display:flex;gap:48px;margin-top:40px;align-items:flex-start}
.stat .num{min-height:38px;display:flex;align-items:flex-end}
.stat .num{font-family:var(--serif);font-size:38px;font-weight:600;line-height:1}
.stat .cap{font-size:10px;letter-spacing:.18em;text-transform:uppercase;color:var(--muted);margin-top:8px}
.about .photo{position:relative}
.about .photo img{width:100%;height:auto;display:block;border-radius:2px;background:var(--bg-alt)}
.about .photo .tag{position:absolute;left:16px;bottom:16px;background:rgba(20,20,20,.82);color:#fff;font-size:10px;letter-spacing:.14em;text-transform:uppercase;padding:8px 14px;backdrop-filter:blur(4px)}
@media(max-width:820px){.about .grid{grid-template-columns:1fr;gap:40px}.about .photo img{height:auto}}

/* ALBUMS */
.albums{background:var(--bg-alt);padding:96px 0}
.albums .head{display:flex;justify-content:space-between;align-items:flex-end;margin-bottom:48px;gap:30px;flex-wrap:wrap}
.albums .head h2{font-family:var(--serif);font-size:clamp(28px,4vw,40px);font-weight:600;margin-top:14px}
.albums .head p{color:var(--muted);font-size:14px;max-width:340px;text-align:right}
.album-grid{display:grid;grid-template-columns:1fr 1fr;gap:30px}
.album{background:#fff;border-radius:3px;overflow:hidden;box-shadow:0 1px 0 var(--line);transition:transform .3s,box-shadow .3s}
.album:hover{transform:translateY(-4px);box-shadow:0 20px 40px -20px rgba(0,0,0,.25)}
.album .cover{height:300px;overflow:hidden;background:#e3e1dc}
.album .cover img{width:100%;height:100%;object-fit:cover;transition:transform .6s}
.album:hover .cover img{transform:scale(1.05)}
.album .body{padding:22px 24px 26px}
.album .body .top{display:flex;justify-content:space-between;align-items:center}
.album h3{font-family:var(--serif);font-size:23px;font-weight:600}
.album .meta{font-size:10px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted)}
.album .desc{font-size:13px;color:#777;margin-top:8px}
.album .xem{display:inline-flex;align-items:center;gap:6px;font-size:11px;letter-spacing:.14em;text-transform:uppercase;font-weight:600;border:1px solid var(--ink);padding:7px 14px;border-radius:2px;transition:.2s;cursor:pointer}
.album .xem:hover{background:var(--ink);color:#fff}
.thumbs{display:flex;gap:6px;margin-top:16px}
.thumbs img{width:46px;height:38px;object-fit:cover;border-radius:2px;opacity:.85}
@media(max-width:760px){.album-grid{grid-template-columns:1fr}.albums .head p{text-align:left}}

/* GALLERY */
.gallery{background:var(--dark);color:#fff;padding:96px 0}
.gallery .head{display:flex;justify-content:space-between;align-items:flex-end;margin-bottom:30px;flex-wrap:wrap;gap:20px}
.gallery .label{color:var(--muted-light)}
.gallery .head h2{font-family:var(--serif);font-size:clamp(28px,4vw,40px);font-weight:600;margin-top:14px}
.gallery .head .right{font-size:11px;letter-spacing:.2em;text-transform:uppercase;color:var(--muted-light)}
.filters{display:flex;gap:10px;margin-bottom:34px;flex-wrap:wrap}
.filters button{font-family:var(--sans);background:transparent;border:1px solid var(--line-dark);color:#cfcfcf;font-size:11px;letter-spacing:.12em;text-transform:uppercase;font-weight:600;padding:9px 16px;border-radius:2px;cursor:pointer;transition:.2s}
.filters button .c{opacity:.5;margin-left:6px}
.filters button:hover{border-color:#666;color:#fff}
.filters button.active{background:#fff;color:var(--dark);border-color:#fff}
.masonry{columns:4;column-gap:14px}
.masonry .item{break-inside:avoid;margin-bottom:14px;overflow:hidden;border-radius:2px;position:relative;cursor:pointer}
.masonry .item img{width:100%;transition:transform .6s;background:#222}
.masonry .item:hover img{transform:scale(1.06)}
.masonry .item.hide{display:none}
.empty-note{color:var(--muted-light);text-align:center;padding:40px 0;font-size:14px}
@media(max-width:1024px){.masonry{columns:3}}
@media(max-width:680px){.masonry{columns:2}}

/* CONTACT */
.contact{background:var(--dark-2);color:#fff;padding:96px 0;border-top:1px solid var(--line-dark)}
.contact .grid{display:grid;grid-template-columns:1fr auto;gap:60px;align-items:center}
.contact h2{font-family:var(--serif);font-size:clamp(30px,5vw,52px);font-weight:600;line-height:1.1;margin:18px 0 22px}
.contact h2 em{font-style:italic;font-weight:500}
.contact .sub{color:var(--muted-light);font-size:14px;margin-bottom:26px}
.contact .links{display:flex;gap:26px;font-size:13px;flex-wrap:wrap}
.contact .links a{border-bottom:1px solid #444;padding-bottom:2px;transition:.2s}
.contact .links a:hover{border-color:#fff}
.qr{text-align:center}
.qr .box{background:#fff;padding:16px;border-radius:6px;display:inline-block}
.qr .box img{width:150px;height:150px}
.qr .cap{font-size:10px;letter-spacing:.2em;text-transform:uppercase;color:var(--muted-light);margin-top:14px}
@media(max-width:680px){.contact .grid{grid-template-columns:1fr;gap:40px}}

/* FOOTER */
footer{background:var(--dark);color:#bdbdbd;padding:30px 0;border-top:1px solid var(--line-dark)}
footer .row{display:flex;justify-content:space-between;align-items:center;font-size:12px;letter-spacing:.05em;flex-wrap:wrap;gap:12px}
footer .brand{font-family:var(--serif);font-size:18px;color:#fff;font-weight:600}
footer .mid{color:var(--muted)}

/* LIGHTBOX */
.lightbox{position:fixed;inset:0;background:rgba(0,0,0,.92);z-index:100;display:none;flex-direction:column;align-items:center;justify-content:center;gap:16px;padding:40px}
.lightbox.open{display:flex}
.lightbox img{max-width:92vw;max-height:80vh;object-fit:contain;border-radius:2px}
.lb-close{position:absolute;top:22px;right:32px;color:#fff;font-size:40px;cursor:pointer;line-height:1;opacity:.8}
.lb-close:hover{opacity:1}

/* reveal */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .8s ease,transform .8s ease}
.reveal.in{opacity:1;transform:none}

/* ALBUM VIEW (popup xem ảnh trong album) */
.album .cover{cursor:pointer}
.album-view{position:fixed;inset:0;z-index:95;background:rgba(15,15,15,.96);display:none;overflow-y:auto;padding:0}
.album-view.open{display:block}
.av-panel{max-width:1180px;margin:0 auto;padding:80px 28px 60px;position:relative}
.av-close{position:fixed;top:20px;right:28px;z-index:2;background:rgba(255,255,255,.1);border:none;color:#fff;font-size:30px;line-height:1;width:46px;height:46px;border-radius:50%;cursor:pointer;transition:.2s}
.av-close:hover{background:rgba(255,255,255,.22)}
.av-head{margin-bottom:30px;color:#fff}
.av-title{font-family:var(--serif);font-size:clamp(28px,5vw,44px);font-weight:600}
.av-sub{font-size:11px;letter-spacing:.2em;text-transform:uppercase;color:var(--muted-light);margin-top:8px}
.av-grid{columns:3;column-gap:16px}
.av-item{break-inside:avoid;margin-bottom:16px;overflow:hidden;border-radius:3px;cursor:pointer}
.av-item img{width:100%;display:block;transition:transform .5s}
.av-item:hover img{transform:scale(1.05)}
.av-empty{color:var(--muted-light);text-align:center;padding:40px}
@media(max-width:900px){.av-grid{columns:2}}
@media(max-width:560px){.av-grid{columns:1}.av-panel{padding:70px 18px 50px}}
.lb-cap{color:#f0f0f0;font-family:var(--serif);font-size:clamp(15px,2.2vw,20px);text-align:center;max-width:80vw;line-height:1.4}

/* Nút điều hướng trong lightbox */
.lb-nav{position:fixed;top:50%;transform:translateY(-50%);z-index:2;background:rgba(255,255,255,.12);border:none;color:#fff;width:54px;height:54px;border-radius:50%;font-size:30px;line-height:1;cursor:pointer;display:none;align-items:center;justify-content:center;transition:.2s}
.lightbox.open .lb-nav{display:flex}
.lb-nav:hover{background:rgba(255,255,255,.28)}
.lb-prev{left:24px}
.lb-next{right:24px}
@media(max-width:560px){.lb-nav{width:44px;height:44px;font-size:24px}.lb-prev{left:10px}.lb-next{right:10px}}
.lightbox img{cursor:zoom-in;user-select:none;-webkit-user-drag:none;will-change:transform}