/* Trang NOEL & TẾT 2026–2027 — https://thuytostudio.com/noel-tet-2026-2027
   NGUỒN: output/2026-11-13-web-chinh-noel-tet-2026-2027/scripts/noel.css → 4-dung-trang.py chép sang web/assets/noel-tet/.
   Sửa ở bản trong scripts/, đừng sửa bản trên web. Tiền tố lớp: nt- (trang riêng, không đụng style.css web chính). */
:root{
  --dem:#0b2219; --thong:#123a2b; --thong2:#1a4d39; --do:#8f1d24; --do2:#5f1016; --do3:#b3262f;
  --vang:#d8b35a; --vang2:#f1d58e; --kem:#fbf5e6; --chu:#f3eee1; --chu2:#c9d3cb; --chu-do:#f6e3d6;
  --f:'Josefin Sans',system-ui,-apple-system,'Segoe UI',Roboto,Arial,sans-serif;
  --tieu:'Playfair Display',Georgia,'Times New Roman',serif;
  --tay:'Dancing Script',cursive;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:var(--f);background:var(--dem);color:var(--chu);line-height:1.6;font-size:17px;overflow-x:hidden}
img{display:block;max-width:100%;height:auto}
a{color:inherit}
button{font:inherit;cursor:pointer}
.wrap{width:min(1240px,100% - 32px);margin:0 auto}
.sr{position:absolute;left:-9999px}
.sr:focus{left:12px;top:12px;z-index:999;background:#fff;color:#000;padding:8px 12px}
:focus-visible{outline:2px solid var(--vang2);outline-offset:3px}

/* ---------- đầu trang ---------- */
.nt-dau{position:sticky;top:0;z-index:50;background:rgba(9,28,21,.86);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border-bottom:1px solid rgba(216,179,90,.22)}
.nt-dau .wrap{display:flex;align-items:center;gap:18px;min-height:64px}
.nt-logo{display:flex;flex-direction:column;align-items:center;line-height:1;text-decoration:none;flex:none}
.nt-logo b{font-family:var(--f);font-weight:700;letter-spacing:.18em;font-size:17px;color:#fff}
.nt-logo i{font-family:var(--tay);font-style:normal;color:var(--vang2);font-size:19px;margin-top:-2px}
.nt-menu{display:flex;gap:6px;margin-left:auto;flex-wrap:nowrap;overflow-x:auto;scrollbar-width:none}
.nt-menu::-webkit-scrollbar{display:none}
.nt-menu a{white-space:nowrap;text-decoration:none;font-size:14px;letter-spacing:.04em;padding:8px 12px;border-radius:999px;color:var(--chu2)}
.nt-menu a b{color:var(--vang);margin-right:4px;font-weight:600}
.nt-menu a:hover{color:#fff;background:rgba(255,255,255,.08)}
.nt-dat{flex:none;text-decoration:none;background:var(--vang);color:#2a1d05;font-weight:700;font-size:14px;letter-spacing:.06em;text-transform:uppercase;padding:10px 18px;border-radius:999px}
.nt-dat:hover{background:var(--vang2)}
@media (max-width:980px){.nt-menu{display:none}.nt-dau .wrap{justify-content:space-between}}

/* ---------- hero ---------- */
.nt-hero{position:relative;overflow:hidden;isolation:isolate;padding:64px 0 72px;
  background:radial-gradient(120% 90% at 85% 0%,rgba(143,29,36,.55),transparent 60%),
             radial-gradient(90% 80% at 0% 100%,rgba(26,77,57,.9),transparent 70%),
             linear-gradient(180deg,#081a13,#0b2219 70%)}
/* 13/11 đợt 2: tuyết phủ CẢ KHUNG NHÌN khi đang ở vùng Noel (đầu trang + bộ 01, 02); sang vùng Tết thì tắt dần */
.nt-tuyet{position:fixed;inset:0;width:100vw;height:100vh;z-index:45;pointer-events:none;opacity:0;transition:opacity 1s}
.nt-tuyet.bat{opacity:1}
.nt-hero .nt-hero-trong{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
.nt-mat{font-family:var(--f);text-transform:uppercase;letter-spacing:.28em;font-size:13px;color:var(--vang2)}
.nt-hero h1{font-family:var(--tieu);font-weight:700;line-height:1.02;margin:14px 0 6px;font-size:clamp(46px,7.2vw,92px);letter-spacing:-.01em;color:#fff}
.nt-hero h1 em{font-style:normal;color:var(--vang)}
.nt-nam{display:block;font-family:var(--tieu);font-weight:400;font-size:clamp(24px,3.4vw,40px);letter-spacing:.12em;color:var(--vang2);margin-top:8px}
.nt-ky{font-family:var(--tay);font-size:clamp(26px,3vw,36px);color:var(--vang2);margin:14px 0 8px}
.nt-hero p.nt-mo{color:var(--chu2);max-width:560px;font-size:18px}
.nt-nut{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
.nt-btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:50px;padding:12px 24px;border-radius:999px;text-decoration:none;font-weight:700;letter-spacing:.06em;text-transform:uppercase;font-size:14px;border:1.5px solid var(--vang);background:var(--vang);color:#2a1d05;text-align:center}
.nt-btn:hover{background:var(--vang2);border-color:var(--vang2)}
.nt-btn.trong{background:transparent;color:var(--vang2)}
.nt-btn.trong:hover{background:rgba(216,179,90,.14)}
/* chùm 3 ảnh polaroid */
.nt-chum{position:relative;height:clamp(380px,42vw,560px)}
.nt-pol{position:absolute;width:52%;background:#fff;padding:10px 10px 34px;border-radius:4px;box-shadow:0 22px 50px rgba(0,0,0,.45);text-decoration:none;transition:transform .35s ease}
.nt-pk{display:block;position:relative;aspect-ratio:2/3;overflow:hidden;border-radius:2px;background:#ddd}
.nt-pk img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.nt-viet{position:absolute;left:0;right:0;bottom:6px;text-align:center;font-family:var(--tay);font-size:20px;color:#5b1a1f}
.nt-pol:nth-child(1){left:2%;top:12%;transform:rotate(-8deg)}
.nt-pol:nth-child(2){left:26%;top:0;transform:rotate(3deg);z-index:2}
.nt-pol:nth-child(3){right:0;top:16%;transform:rotate(9deg)}
.nt-pol:hover{transform:rotate(0) translateY(-6px) scale(1.03);z-index:3}
@media (max-width:860px){
  .nt-hero{padding:34px 0 46px}
  .nt-hero .nt-hero-trong{grid-template-columns:1fr;gap:26px}
  .nt-chum{order:-1;height:clamp(320px,90vw,470px);width:min(100%,460px);margin:0 auto}
  .nt-pol{width:47%;padding:7px 7px 26px}.nt-viet{font-size:16px;bottom:4px}
}

/* 4 thẻ bộ sưu tập dưới hero */
.nt-4{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:46px}
.nt-the{position:relative;display:block;text-decoration:none;border-radius:18px;overflow:hidden;aspect-ratio:3/4;background:#173d2e;box-shadow:0 14px 34px rgba(0,0,0,.35)}
.nt-the img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform .6s ease,opacity .9s ease}
.nt-the:hover img{transform:scale(1.05)}
.nt-the::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(0,0,0,0) 40%,rgba(5,15,10,.88))}
.nt-the .nt-the-chu{position:absolute;left:16px;right:16px;bottom:14px;z-index:1}
.nt-the b{display:block;font-family:var(--tieu);color:var(--vang);font-size:30px;line-height:1}
.nt-the strong{display:block;color:#fff;font-size:17px;line-height:1.25;margin-top:6px;font-weight:600}
.nt-the small{display:block;color:var(--chu2);font-size:13px;margin-top:4px;letter-spacing:.05em}
@media (max-width:980px){.nt-4{grid-template-columns:repeat(2,1fr);gap:12px}}
@media (max-width:420px){.nt-the strong{font-size:15px}.nt-the b{font-size:24px}.nt-the .nt-the-chu{left:12px;right:12px;bottom:10px}}

/* ---------- 4 bộ sưu tập ---------- */
.nt-bo{position:relative;padding:76px 0 84px;scroll-margin-top:60px}
.nt-bo.noel{background:linear-gradient(180deg,#0e2b20,#0b2219)}
.nt-bo.noel.b2{background:linear-gradient(180deg,#123a2b,#0e2b20)}
.nt-bo.tet{background:linear-gradient(180deg,#6d141b,#4f0d12);color:var(--chu-do)}
.nt-bo.tet.b4{background:linear-gradient(180deg,#5a1016,#3f0a0e)}
.nt-bo::before{content:"";position:absolute;left:0;right:0;top:0;height:6px;
  background:repeating-linear-gradient(90deg,var(--vang) 0 18px,transparent 18px 30px);opacity:.55}
.nt-bo-dau{display:grid;grid-template-columns:auto 1fr auto;gap:22px;align-items:end;margin-bottom:34px}
.nt-so{font-family:var(--tieu);font-size:clamp(64px,9vw,112px);line-height:.8;color:var(--vang);font-weight:700}
.nt-bo h2{font-family:var(--tieu);font-size:clamp(30px,4vw,48px);line-height:1.1;color:#fff;font-weight:700}
.nt-bo .nt-cau{font-family:var(--tay);font-size:clamp(22px,2.4vw,28px);color:var(--vang2);margin-top:6px;line-height:1.3}
.nt-dem{color:var(--chu2);font-size:14px;letter-spacing:.12em;text-transform:uppercase;white-space:nowrap}
.nt-bo.tet .nt-dem{color:#e9c9b9}
@media (max-width:700px){
  .nt-bo{padding:54px 0 60px}
  .nt-bo-dau{grid-template-columns:auto 1fr;gap:6px 16px;margin-bottom:24px}
  .nt-dem{grid-column:1/-1}
}
/* lưới ảnh — ô 2:3 (đúng tỉ lệ ảnh chụp, không cắt); ảnh GHÉP concept chiếm 2×2 ô, hiện đủ khung trên nền mờ */
.nt-luoi{display:grid;grid-template-columns:repeat(auto-fill,minmax(176px,1fr));grid-auto-flow:row dense;gap:12px}
.nt-o{position:relative;display:block;overflow:hidden;border-radius:12px;aspect-ratio:2/3;background:#0f2f23;
  text-decoration:none;box-shadow:0 8px 22px rgba(0,0,0,.28)}
.nt-bo.tet .nt-o{background:#3d0a0e}
.nt-o img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease,opacity .4s}
.nt-o:hover img{transform:scale(1.045)}
.nt-o.ghep{grid-column:span 2;grid-row:span 2}
.nt-o.ghep::before{content:"";position:absolute;inset:-20px;background:var(--nen) center/cover;filter:blur(18px) brightness(.55)}
.nt-o.ghep img{position:relative;object-fit:contain}
.nt-o.ghep:hover img{transform:none}
.nt-o.du img{object-fit:contain;position:relative}
.nt-o.du::before{content:"";position:absolute;inset:-20px;background:var(--nen) center/cover;filter:blur(18px) brightness(.55)}
.nt-o .nt-tim{position:absolute;right:8px;top:8px;width:28px;height:28px;border-radius:50%;background:#d64056;color:#fff;
  display:none;align-items:center;justify-content:center;font-size:14px;box-shadow:0 2px 8px rgba(0,0,0,.35);z-index:1}
.nt-o.da-thich .nt-tim{display:flex}
.nt-o .nt-nhan{position:absolute;left:8px;bottom:8px;z-index:1;background:rgba(216,179,90,.92);color:#2a1d05;
  font-size:11px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;padding:4px 9px;border-radius:999px}
@media (max-width:560px){
  .nt-luoi{grid-template-columns:repeat(2,1fr);gap:8px}
  .nt-o{border-radius:9px}
  .nt-o.ghep{grid-row:auto;aspect-ratio:var(--tl)}
}

/* ---------- lời mời đặt lịch ---------- */
.nt-moi{position:relative;padding:80px 0;text-align:center;overflow:hidden;
  background:radial-gradient(80% 120% at 50% 0%,rgba(216,179,90,.18),transparent 60%),linear-gradient(180deg,#0e2b20,#081a13)}
.nt-moi h2{font-family:var(--tieu);font-size:clamp(32px,4.6vw,56px);color:#fff;line-height:1.1}
.nt-moi .nt-ky{margin-top:6px}
.nt-moi p{color:var(--chu2);max-width:640px;margin:10px auto 0}
.nt-moi .nt-nut{justify-content:center}
.nt-lh{display:flex;flex-wrap:wrap;justify-content:center;gap:10px 26px;margin-top:26px;color:var(--chu2);font-size:15px}
.nt-lh a{color:var(--vang2);text-decoration:none;font-weight:600}

/* ---------- chân trang ---------- */
.nt-chan{background:#06140e;color:var(--chu2);padding:40px 0 110px;font-size:15px;border-top:1px solid rgba(216,179,90,.18)}
.nt-chan .wrap{display:grid;grid-template-columns:1.3fr 1fr 1fr;gap:28px}
.nt-chan h3{color:#fff;font-size:15px;letter-spacing:.14em;text-transform:uppercase;margin-bottom:10px;font-weight:600}
.nt-chan a{color:var(--chu2);text-decoration:none}
.nt-chan a:hover{color:var(--vang2)}
.nt-chan ul{list-style:none;display:grid;gap:6px}
.nt-ban-quyen{grid-column:1/-1;border-top:1px solid rgba(255,255,255,.08);padding-top:18px;font-size:13px;letter-spacing:.06em;text-align:center}
@media (max-width:760px){.nt-chan .wrap{grid-template-columns:1fr}}

/* ---------- nút nổi: âm nhạc (trái) + Zalo (phải) ---------- */
.nt-am{position:fixed;left:16px;bottom:18px;z-index:120;display:flex;flex-direction:column;align-items:flex-start;gap:10px;
  max-width:min(440px,calc(100vw - 104px));pointer-events:none}
.nt-am-nut{pointer-events:auto;display:inline-flex;align-items:center;gap:10px;min-height:46px;padding:9px 18px 9px 12px;border-radius:999px;
  border:1px solid rgba(241,213,142,.55);background:rgba(10,30,22,.92);color:#fff;font-size:14px;font-weight:600;letter-spacing:.02em;
  box-shadow:0 8px 24px rgba(0,0,0,.35);-webkit-tap-highlight-color:transparent;text-align:left}
.nt-am-nut:hover{border-color:var(--vang2)}
.nt-am-nut .nt-chuong{font-size:18px;line-height:1}
.nt-song{display:inline-flex;align-items:flex-end;gap:2px;width:18px;height:16px;flex:none}
.nt-song i{flex:1;background:var(--vang2);border-radius:2px;height:35%;transform-origin:bottom}
.nt-song i:nth-child(2){height:80%}.nt-song i:nth-child(3){height:55%}.nt-song i:nth-child(4){height:95%}
.nt-am.phat .nt-song i{animation:ntSong .9s ease-in-out infinite}
.nt-am.phat .nt-song i:nth-child(2){animation-delay:.15s}.nt-am.phat .nt-song i:nth-child(3){animation-delay:.3s}.nt-am.phat .nt-song i:nth-child(4){animation-delay:.45s}
.nt-am.cho .nt-am-nut{animation:ntMoi 1.6s ease-in-out infinite;background:var(--do)}
.nt-am-chu{pointer-events:none;background:rgba(251,245,230,.97);color:#3a1a12;border-radius:18px 18px 18px 4px;padding:12px 16px;
  font-size:16px;line-height:1.5;font-style:italic;box-shadow:0 10px 30px rgba(0,0,0,.3);opacity:0;transform:translateY(8px);transition:opacity .35s,transform .35s;
  border-left:4px solid var(--do3)}
.nt-am-chu.hien{opacity:1;transform:none}
.nt-am-chu.goi-y{font-style:normal;font-weight:600;border-left-color:var(--vang)}
.nt-zalo{position:fixed;right:16px;bottom:18px;z-index:120;width:58px;height:58px;border-radius:50%;background:#0068ff;color:#fff;
  display:flex;align-items:center;justify-content:center;font-weight:700;font-size:14px;text-decoration:none;box-shadow:0 8px 24px rgba(0,0,0,.4)}
.nt-zalo:hover{background:#0a5be0}
@keyframes ntSong{0%,100%{transform:scaleY(.45)}50%{transform:scaleY(1)}}
@keyframes ntMoi{0%,100%{box-shadow:0 8px 24px rgba(0,0,0,.35),0 0 0 0 rgba(241,213,142,.6)}50%{box-shadow:0 8px 24px rgba(0,0,0,.35),0 0 0 10px rgba(241,213,142,0)}}
body.dang-xem .nt-zalo{display:none}
/* ảnh chạy: tấm mới mờ dần đè lên tấm cũ */
.nt-pk img.nt-vao,.nt-the img.nt-vao{opacity:0;transition:opacity .9s ease}
.nt-pk img.nt-vao.hien,.nt-the img.nt-vao.hien{opacity:1}
/* ông già Noel của Thuý Tô Studio bay qua bay lại phát quà (13/11 đợt 2) */
.nt-santa{position:fixed;left:0;top:0;z-index:46;pointer-events:none;display:flex;align-items:center;opacity:0;transition:opacity .6s;will-change:transform}
.nt-santa.bat{opacity:1}
.nt-santa svg{width:340px;height:auto;flex:none;filter:drop-shadow(0 6px 10px rgba(0,0,0,.35))}
.nt-santa.trai svg{transform:scaleX(-1)}
.nt-santa{flex-direction:row-reverse}.nt-santa.trai{flex-direction:row}
.nt-bang{flex:none;margin:0 -6px;padding:7px 16px 6px;border-radius:999px;background:var(--do3);border:2px solid var(--vang);color:var(--vang2);
  font:700 13px/1 var(--f);letter-spacing:.16em;white-space:nowrap;box-shadow:0 6px 14px rgba(0,0,0,.3);animation:ntBang 1.4s ease-in-out infinite;transform-origin:center}
.nt-bang i{font-style:normal;font-family:var(--tay);letter-spacing:0;font-size:16px;color:#fff;margin-right:6px}
@keyframes ntBang{0%,100%{transform:rotate(-3deg) translateY(0)}50%{transform:rotate(3deg) translateY(3px)}}
.nt-qua{position:fixed;left:0;top:0;z-index:46;width:26px;height:26px;pointer-events:none;will-change:transform,opacity}
body.dang-xem .nt-santa,body.dang-xem .nt-qua,body.dang-xem .nt-tuyet{display:none}
@media (max-width:700px){.nt-santa svg{width:215px}.nt-bang{font-size:10px;padding:5px 10px 4px;letter-spacing:.1em}.nt-bang i{display:none}.nt-qua{width:20px;height:20px}}
body.dang-xem .nt-am{bottom:auto;top:-999px}
@media (max-width:560px){.nt-am{left:10px;bottom:12px;max-width:calc(100vw - 90px)}.nt-am-chu{font-size:14.5px}.nt-zalo{right:10px;bottom:12px;width:54px;height:54px}}

/* ---------- trình xem ảnh ---------- */
.nt-lb{position:fixed;inset:0;z-index:300;background:rgba(5,14,10,.96);display:flex;align-items:center;justify-content:center;padding:60px 16px 40px}
.nt-lb[hidden]{display:none}
.nt-lb-vung{position:relative}
.nt-lb-khung{position:relative;display:flex;align-items:center;justify-content:center}
.nt-lb-khung img{max-width:92vw;max-height:calc(100vh - 140px);max-height:calc(100svh - 140px);width:auto;height:auto;border-radius:8px;
  cursor:zoom-in;touch-action:none;will-change:transform;user-select:none;-webkit-user-select:none}
.nt-lb.da-phong .nt-lb-khung img{cursor:grab}
.nt-lb-chu{position:absolute;left:50%;transform:translateX(-50%);top:100%;margin-top:10px;width:min(92vw,900px);text-align:center;color:#dbe7e0;font-size:14px;line-height:1.35}
.nt-lb-thanh{position:absolute;top:10px;left:50%;transform:translateX(-50%);z-index:4;display:flex;gap:6px;padding:5px;border-radius:999px;background:rgba(0,0,0,.35)}
.nt-lb-nut,.nt-lb-dong,.nt-lb-truoc,.nt-lb-sau{border:0;background:rgba(255,255,255,.14);color:#fff}
.nt-lb-nut{min-width:44px;height:40px;border-radius:999px;font-size:18px;padding:0 12px;display:inline-flex;align-items:center;justify-content:center;gap:6px}
.nt-lb-nut:hover,.nt-lb-dong:hover,.nt-lb-truoc:hover,.nt-lb-sau:hover{background:var(--vang);color:#1b2a20}
.nt-lb-muc{font-size:13px;font-weight:600;min-width:64px}
.nt-lb-nut.thich.on{background:#d64056;color:#fff}
.nt-lb-dong{position:absolute;top:10px;right:12px;z-index:5;width:48px;height:48px;border-radius:50%;font-size:22px}
.nt-lb-truoc,.nt-lb-sau{position:absolute;top:50%;margin-top:-26px;width:52px;height:52px;border-radius:50%;font-size:30px;line-height:1;z-index:3}
.nt-lb-truoc{left:12px}.nt-lb-sau{right:12px}
.nt-lb-bao{position:absolute;left:50%;top:64px;transform:translateX(-50%);z-index:6;background:var(--vang2);color:#2a1d05;font-weight:600;
  padding:8px 16px;border-radius:999px;font-size:14px;transition:opacity .5s;white-space:nowrap}
.nt-lb-bao.tat{opacity:0}
.nt-lb input{position:absolute;left:-9999px;opacity:0}
@media (max-width:700px){
  .nt-lb{padding:56px 8px 84px}
  .nt-lb-thanh{left:8px;transform:none;top:8px;gap:3px;padding:3px}
  .nt-lb-nut{min-width:38px;height:36px;font-size:16px;padding:0 8px}
  .nt-lb-muc{min-width:52px;font-size:12px}
  .nt-lb-dong{top:6px;right:6px;width:44px;height:44px}
  .nt-lb-truoc,.nt-lb-sau{top:auto;bottom:14px;margin:0}
  .nt-lb-khung img{max-height:calc(100vh - 170px);max-height:calc(100svh - 170px)}
  .nt-lb-chu{font-size:13px}
}
@media (max-width:380px){.nt-lb-nut .nt-chu-nut{display:none}}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}.nt-am.phat .nt-song i,.nt-am.cho .nt-am-nut{animation:none}}