/* Trang chủ công khai Rosé Wedding (đợt D). Đợt E (09/11/2026): chỉ còn đen và trắng. Nền trắng, chữ đen #111, chữ phụ #6B6B6B,
   đường kẻ xám nhạt; --nhan là màu nhấn (đen trên nền sáng, trắng trên khối nền đen). Playfair Display cho tiêu đề, Montserrat cho chữ thường. */
:root{
  --trang:#FFFFFF;--ink:#111111;--muted:#6B6B6B;--dark:#000;--nen2:#F4F4F4;
  --nhan:#111111;--line:#E6E6E6;
  --trang78:rgba(255,255,255,.78);--trang55:rgba(255,255,255,.55);
  --ease:cubic-bezier(.22,.61,.36,1);
  --sans:'Montserrat',system-ui,-apple-system,'Segoe UI',sans-serif;
  --serif:'Playfair Display',Georgia,serif;
  --le:max(16px,env(safe-area-inset-left));--le-p:max(16px,env(safe-area-inset-right));
}
/* Khối nền đen (ảnh đầu trang, liên hệ, chân trang, xem ảnh lớn): nhấn và đường kẻ trắng */
.hero,.lien-he,.cuoi,.xem{--nhan:#FFFFFF;--line:rgba(255,255,255,.24)}
.hero.trong{--nhan:#111111;--line:#E6E6E6}
*{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%}
body{font-family:var(--sans);font-weight:300;font-size:15.5px;line-height:1.7;background:var(--trang);color:var(--ink);overflow-x:hidden}
img{display:block;max-width:100%}
a{color:inherit}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;border-radius:0}
h1,h2{font-family:var(--serif);font-weight:500;letter-spacing:.005em}
:focus-visible{outline:2px solid var(--nhan);outline-offset:3px}
[hidden]{display:none!important}
.eyebrow{font-size:11px;font-weight:500;letter-spacing:.42em;padding-left:.42em;text-transform:uppercase;color:var(--nhan)}

/* Đầu trang: logo trái, link đăng nhập studio nhỏ bên phải */
.dau{position:sticky;top:0;z-index:5;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:calc(10px + env(safe-area-inset-top)) var(--le-p) 10px var(--le);background:rgba(255,255,255,.92);
  backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.dau-logo img{height:34px;width:auto}
.dau-dn{font-size:11px;font-weight:400;letter-spacing:.12em;color:var(--muted);text-decoration:none;min-height:44px;display:inline-flex;align-items:center;transition:color .3s var(--ease)}
.dau-dn:hover{color:var(--ink)}
@media (min-width:768px){.dau{padding-left:max(32px,env(safe-area-inset-left));padding-right:max(32px,env(safe-area-inset-right))}.dau-logo img{height:40px}}

/* Ảnh lớn đầu trang */
.hero{position:relative;min-height:min(78svh,760px);display:flex;align-items:flex-end;overflow:hidden;background:var(--dark);color:var(--trang)}
.hero-anh{position:absolute;inset:0;background:var(--ink) 50% 35%/cover no-repeat;transform:scale(1.04);transition:transform 6s var(--ease),opacity 1s var(--ease);opacity:0}
.hero-anh.ok{opacity:1;transform:scale(1)}
.hero::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(0,0,0,0) 35%,rgba(0,0,0,.25) 60%,rgba(0,0,0,.72) 100%);pointer-events:none}
.hero-c{position:relative;z-index:1;width:100%;max-width:880px;margin:0 auto;padding:0 var(--le-p) calc(48px + env(safe-area-inset-bottom)) var(--le);text-align:center;display:flex;flex-direction:column;align-items:center}
.hero .eyebrow{color:var(--nhan);margin-bottom:18px}
.hero h1{font-size:clamp(32px,7.4vw,64px);line-height:1.15;color:var(--trang);max-width:15em}
.ke{display:block;width:56px;height:1px;background:var(--line);margin-top:26px}
.hero-logo{display:none}
/* Chưa có album mẫu: khối trắng, logo lớn, chữ đen */
.hero.trong{background:var(--trang);color:var(--ink);align-items:center;min-height:min(70svh,640px);border-bottom:1px solid var(--line)}
.hero.trong::after,.hero.trong .hero-anh{display:none}
.hero.trong .hero-c{padding-top:48px;padding-bottom:56px}
.hero.trong .hero-logo{display:block;width:min(260px,62vw);height:auto;margin-bottom:34px}
.hero.trong .eyebrow{color:var(--nhan)}
.hero.trong h1{color:var(--ink)}

/* Khối nội dung */
.khoi{max-width:1200px;margin:0 auto;padding:72px var(--le-p) 8px var(--le);text-align:center}
.khoi h2,.lien-he h2{font-size:clamp(28px,5.4vw,42px);line-height:1.2;margin:12px 0 28px}
.khoi-ghi{color:var(--muted);margin:-14px auto 28px;max-width:30em}
@media (min-width:768px){.khoi{padding-left:max(32px,env(safe-area-inset-left));padding-right:max(32px,env(safe-area-inset-right));padding-top:96px}}

/* Ảnh nổi bật: lưới đơn giản 2 cột trên điện thoại, 3 cột trên máy tính */
.luoi-anh{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:6px}
@media (min-width:768px){.luoi-anh{grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}}
.o-anh{position:relative;display:block;width:100%;aspect-ratio:4/5;overflow:hidden;background:var(--nen2);cursor:zoom-in}
.o-anh img{width:100%;height:100%;object-fit:cover;opacity:0;transition:opacity .6s var(--ease),transform 1.2s var(--ease)}
.o-anh img.ok{opacity:1}
@media (hover:hover){.o-anh:hover img{transform:scale(1.03)}}

/* Album mẫu: thẻ ảnh bìa, tên hai bạn, ngày cưới */
.luoi-album{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px 12px;text-align:left}
@media (min-width:768px){.luoi-album{grid-template-columns:repeat(3,minmax(0,1fr));gap:40px 24px}}
.the-album{display:block;text-decoration:none;color:var(--ink)}
.the-album .bia{aspect-ratio:4/5;overflow:hidden;background:var(--nen2)}
.the-album .bia img{width:100%;height:100%;object-fit:cover;opacity:0;transition:opacity .6s var(--ease),transform 1.2s var(--ease)}
.the-album .bia img.ok{opacity:1}
@media (hover:hover){.the-album:hover .bia img{transform:scale(1.03)}}
.the-album h3{font:500 clamp(17px,3.6vw,22px)/1.3 var(--serif);margin-top:14px;overflow-wrap:anywhere}
.the-album p{font-size:12px;letter-spacing:.2em;color:var(--muted);margin-top:4px;font-variant-numeric:tabular-nums}
.the-album .xem-l{display:inline-block;margin-top:10px;font-size:11px;font-weight:500;letter-spacing:.28em;text-transform:uppercase;color:var(--nhan);border-bottom:1px solid var(--line);padding-bottom:2px}

/* Liên hệ: khối nền đen */
.lien-he{margin-top:96px;background:var(--dark);color:var(--trang);text-align:center;padding:80px var(--le-p) 72px var(--le)}
.lien-he .eyebrow{color:var(--nhan)}
.lien-he h2{color:var(--trang)}
.lh-ds{list-style:none;max-width:560px;margin:0 auto;border-top:1px solid var(--line)}
.lh-ds li{display:flex;flex-direction:column;gap:2px;padding:16px 0;border-bottom:1px solid var(--line)}
.lh-ds small{font-size:10.5px;font-weight:500;letter-spacing:.28em;text-transform:uppercase;color:var(--nhan)}
.lh-ds a,.lh-ds span{color:var(--trang78);text-decoration:none;font-size:15.5px;overflow-wrap:anywhere}
.lh-ds a:hover{color:var(--trang)}
.lh-nut{display:flex;flex-wrap:wrap;justify-content:center;gap:12px;margin-top:32px}
.lh-nut:empty{display:none}
.nut{display:inline-flex;align-items:center;justify-content:center;min-height:52px;min-width:min(100%,220px);padding:14px 22px;border:1px solid var(--nhan);
  font-family:var(--sans);font-size:12px;font-weight:500;letter-spacing:.28em;text-transform:uppercase;text-decoration:none;color:var(--trang);
  background-image:linear-gradient(var(--nhan),var(--nhan));background-repeat:no-repeat;background-position:0 100%;background-size:100% 0;
  transition:background-size .5s var(--ease),color .5s var(--ease)}
.nut.chinh{background-color:var(--trang);color:var(--ink);border-color:var(--trang)}
@media (hover:hover){.nut:hover{background-size:100% 100%;color:var(--ink)}}

/* Chân trang */
.cuoi{background:var(--dark);color:var(--trang55);text-align:center;padding:8px var(--le-p) calc(40px + env(safe-area-inset-bottom)) var(--le);border-top:1px solid var(--line)}
.cuoi img{height:30px;width:auto;margin:32px auto 14px;opacity:.85}
.cuoi p{font-size:11px;letter-spacing:.2em}

/* Xem ảnh lớn: nền đen, vuốt hoặc bấm mũi tên */
.xem{position:fixed;inset:0;z-index:20;background:#000;color:var(--trang78);display:flex;align-items:center;justify-content:center;animation:hien .3s var(--ease)}
.xem-anh{position:absolute;inset:56px 0 56px;display:flex;align-items:center;justify-content:center;touch-action:pan-y}
.xem-anh img{max-width:100%;max-height:100%;object-fit:contain;transition:opacity .3s var(--ease),transform .3s var(--ease)}
.xem-x{position:absolute;top:calc(8px + env(safe-area-inset-top));right:var(--le-p);z-index:2;min-height:44px;padding:8px 14px;border:1px solid var(--line);font-size:11px;font-weight:500;letter-spacing:.28em;text-transform:uppercase;color:var(--trang78)}
.xem-x:hover{border-color:var(--nhan);color:var(--trang)}
.xem-dk{position:absolute;top:50%;z-index:2;width:48px;height:64px;margin-top:-32px;display:grid;place-items:center;color:var(--trang78)}
.xem-dk:hover{color:var(--nhan)}
.xem-dk.truoc{left:4px}.xem-dk.sau{right:4px}
.xem-dk svg{width:28px;height:28px}
.xem-so{position:absolute;bottom:calc(16px + env(safe-area-inset-bottom));left:0;right:0;text-align:center;font-size:12px;letter-spacing:.2em;font-variant-numeric:tabular-nums;color:var(--trang55)}
:root .xem :focus-visible{outline-color:var(--nhan)}
@media (max-width:640px){.xem-dk{display:none}}
@keyframes hien{from{opacity:0}to{opacity:1}}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important}
  .hero-anh{transform:none}
}