/* Hoa Tiên — phong cách theo trang "Selah Living · Hoa Tien" của Tiên:
   một cột đọc hẹp trên nền vải lanh mộc, ngắt bằng những dải vải chàm (shibori, arashi) vẽ bằng code. */
:root{
  --linen:#efe6d6;      /* nền: vải bông chưa nhuộm */
  --linen-2:#e5d8c2;    /* bề mặt nổi */
  --ink:#1f2a44;        /* chữ: đen ngả chàm */
  --muted:#5d6273;
  --indigo:#23366f;     /* màu chàm chính */
  --indigo-deep:#162350;
  --indigo-pale:#c9d0e4;/* lần nhúng đầu, xanh nhạt */
  --rule:#cfc0a6;
  --on-indigo:#f3ecdf;
  --ok:#2f6b4f; --warn:#8a5a12; --err:#9b2c2c;
  --display:"Cormorant","Cormorant Garamond",Georgia,"Times New Roman",serif;
  --body:"Jost","Avenir Next","Segoe UI",system-ui,sans-serif;
  --step-0:1.0625rem; --step-1:1.3rem; --step-2:1.9rem; --step-3:2.8rem; --step-4:clamp(2.5rem,7vw,4.4rem);
  color-scheme:light;
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  --linen:#121a33;--linen-2:#1a2445;--ink:#ece3d2;--muted:#a9adbd;--indigo:#9fb0e3;--indigo-deep:#0c1430;
  --indigo-pale:#2b3a6e;--rule:#2f3b63;--on-indigo:#efe6d6;--ok:#8fd1ae;--warn:#e6b766;--err:#f0a3a3;color-scheme:dark}}
:root[data-theme="dark"]{
  --linen:#121a33;--linen-2:#1a2445;--ink:#ece3d2;--muted:#a9adbd;--indigo:#9fb0e3;--indigo-deep:#0c1430;
  --indigo-pale:#2b3a6e;--rule:#2f3b63;--on-indigo:#efe6d6;--ok:#8fd1ae;--warn:#e6b766;--err:#f0a3a3;color-scheme:dark}

*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:4.5rem}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{margin:0;background:var(--linen);color:var(--ink);font:300 var(--step-0)/1.7 var(--body)}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-underline-offset:.2em;text-decoration-thickness:1px}
a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible{outline:2px solid var(--indigo);outline-offset:3px}
h1,h2,h3{font-family:var(--display);font-weight:500;line-height:1.12;text-wrap:balance;margin:0}
strong,b{font-weight:500}
[hidden]{display:none!important}
.wrap{max-width:68rem;margin:0 auto;padding-inline:clamp(16px,4vw,40px)}
.read{max-width:38rem}
.eyebrow,.chu-tay{display:block;font:500 .75rem/1.3 var(--body);letter-spacing:.18em;text-transform:uppercase;color:var(--muted)}

/* dải bản nháp */
.dai-nhap{background:#f4d58d;color:#3b2c06;text-align:center;font-size:.85rem;padding:.5rem 1rem}

/* đầu trang */
header{position:sticky;top:0;z-index:5;background:var(--linen);border-bottom:1px solid var(--rule)}
.bar{display:flex;align-items:center;justify-content:space-between;gap:1rem;padding-block:.9rem}
.brand{font-family:var(--display);font-size:1.45rem;font-weight:600;text-decoration:none;letter-spacing:.01em;white-space:nowrap}
.brand span{font-style:italic;font-weight:500;color:var(--indigo)}
nav ul{display:flex;flex-wrap:wrap;align-items:center;gap:.25rem 1.3rem;list-style:none;margin:0;padding:0;font-size:.9rem}
nav a{text-decoration:none;color:var(--muted)}
nav a:hover{color:var(--ink)}
nav .btn{color:var(--indigo)}
/* 3 tab: Nghệ sĩ · Lớp học · Nhuộm chàm */
.tabs{gap:.25rem 1.6rem}
.tabs a{font-size:.95rem;padding-block:.3rem;border-bottom:1px solid transparent}
.tabs a[aria-current="page"]{color:var(--ink);border-bottom-color:var(--indigo)}
@media (max-width:700px){
  .bar{flex-wrap:wrap;row-gap:.5rem}
  nav{order:3;width:100%}
  .tabs{justify-content:space-between;flex-wrap:nowrap;gap:.5rem}
  .tabs a{font-size:.9rem;white-space:nowrap}
}

/* nút */
.btns,.hang-nut{display:flex;flex-wrap:wrap;gap:.8rem}
.btn,.nut{display:inline-block;padding:.75rem 1.3rem;font:500 .9rem/1 var(--body);letter-spacing:.04em;text-decoration:none;
  border:1px solid var(--indigo);border-radius:999px;background:transparent;color:var(--ink);cursor:pointer}
.btn.solid,.nut{background:var(--indigo);color:var(--linen)}
.btn:hover,.nut:hover{background:var(--indigo-deep);color:var(--on-indigo);border-color:var(--indigo-deep)}
.nut-vien{background:transparent;color:var(--ink)}
.nut-chu{background:transparent;border-color:transparent;color:var(--muted);text-decoration:underline}
.nut-chu:hover{background:transparent;color:var(--ink);border-color:transparent}
.nut-lon{padding:1rem 1.6rem;font-size:1rem;width:100%}
.btn.small{padding:.5rem .95rem;font-size:.82rem}
.band .btn,.band .nut{border-color:var(--on-indigo)}
.band .btn.solid,.band .nut{background:var(--on-indigo);color:var(--indigo-deep)}
.band .btn:not(.solid){color:var(--on-indigo)}
.band .btn:hover,.band .nut:hover{background:var(--indigo-pale);color:var(--indigo-deep);border-color:var(--indigo-pale)}

/* mở đầu */
.hero{display:grid;grid-template-columns:1.1fr .9fr;gap:clamp(1.5rem,4vw,4rem);align-items:center;padding-block:clamp(2.5rem,7vw,5.5rem)}
.hero > *{min-width:0}
.hero h1{font-size:var(--step-4);margin-block:.9rem 1.2rem}
.hero h1 em{color:var(--indigo)}
.hero p{max-width:32rem;color:var(--muted);margin:0 0 1.8rem}
.hero figure{margin:0}
.hero img{aspect-ratio:4/5;object-fit:cover;width:100%;border-radius:2px;box-shadow:0 1px 0 var(--rule)}
figcaption,.cap{margin-top:.6rem;font-size:.8rem;color:var(--muted)}
@media (max-width:760px){.hero{grid-template-columns:1fr}.hero img{aspect-ratio:3/2}}

/* định nghĩa */
.selah{border-block:1px solid var(--rule);padding-block:2.4rem;display:grid;grid-template-columns:auto 1fr;gap:1rem 2.5rem;align-items:baseline;margin:0}
.selah dt{font-family:var(--display);font-size:var(--step-3);font-style:italic;color:var(--indigo)}
.selah dd{margin:0;max-width:40rem}
.selah dd small{display:block;color:var(--muted);font-size:.85rem;letter-spacing:.06em}
@media (max-width:600px){.selah{grid-template-columns:1fr}}

section{padding-block:clamp(3rem,8vw,5.5rem)}
section h2{font-size:var(--step-3);margin-block:.7rem 1.4rem}
section p{margin:0 0 1.1rem}
.h-nho{font-size:var(--step-2)!important}

/* câu chuyện */
.story{display:grid;grid-template-columns:1fr 1fr;gap:clamp(2rem,5vw,5rem)}
.story > *{min-width:0}
.pull{font-family:var(--display);font-size:var(--step-2);line-height:1.25;font-style:italic;color:var(--indigo);margin:0 0 1.5rem}
@media (max-width:760px){.story{grid-template-columns:1fr}}
.line{list-style:none;margin:1.6rem 0 0;padding:0;border-left:1px solid var(--rule)}
.line li{position:relative;padding:0 0 1.5rem 1.4rem}
.line li::before{content:"";position:absolute;left:-5px;top:.55rem;width:9px;height:9px;border-radius:50%;background:var(--indigo)}
.line li.next::before{background:var(--linen);border:1px solid var(--indigo)}
.line b{display:block;font:500 .78rem/1.4 var(--body);letter-spacing:.14em;text-transform:uppercase;color:var(--muted)}

/* lớp vẽ */
.classes{display:grid;grid-template-columns:repeat(2,1fr);gap:clamp(1.2rem,3vw,2.5rem);margin-top:2.2rem}
.classes > *{min-width:0;border-top:1px solid var(--rule);padding-top:1.1rem}
.classes h3{font-size:1.75rem;margin-bottom:.4rem}
.classes .price{font-family:var(--display);font-size:1.5rem;color:var(--indigo);margin:.2rem 0 .6rem}
.classes ul{margin:0;padding-left:1.1rem;color:var(--muted);font-size:.98rem}
@media (max-width:700px){.classes{grid-template-columns:1fr}}
.art{display:grid;grid-template-columns:.9fr 1.1fr;gap:clamp(1.5rem,4vw,3.5rem);align-items:center;margin-top:3rem}
.art > *{min-width:0}
.art figure{margin:0}
.art img{border:1px solid var(--rule);border-radius:2px}
.art h3{font-size:1.75rem;margin-bottom:.6rem}
@media (max-width:760px){.art{grid-template-columns:1fr}}
.ghi-chu{color:var(--muted);font-size:.92rem}
.nho{font-size:.82rem}

/* dải chàm */
.band{background:var(--indigo-deep);color:var(--on-indigo);position:relative;overflow:hidden}
.band .eyebrow{color:var(--indigo-pale)}
.band canvas.streaks{position:absolute;inset:0;width:100%;height:100%;opacity:.35;pointer-events:none}
.band .wrap{position:relative}
.band .ghi-chu{color:rgba(243,236,223,.75)}
.dips{display:grid;grid-template-columns:repeat(6,1fr);gap:6px;margin-top:2rem;max-width:34rem}
.dips div{aspect-ratio:1;border-radius:2px}
.dips span{display:block;font-size:.72rem;letter-spacing:.08em;color:var(--indigo-pale);margin-top:.35rem;text-align:center}
.photos{display:grid;grid-template-columns:1fr 1fr;gap:1.2rem;margin-top:2.4rem}
.photos figure{margin:0;min-width:0}
.photos img{aspect-ratio:3/2;object-fit:cover;width:100%;border-radius:2px}
.photos figcaption{color:rgba(243,236,223,.75)}
@media (max-width:640px){.photos{grid-template-columns:1fr}}
.workshop{margin-top:3rem;border-top:1px solid rgba(239,230,214,.3);padding-top:2rem;display:grid;grid-template-columns:1.1fr .9fr;gap:clamp(1.5rem,4vw,3.5rem)}
.workshop > *{min-width:0}
.workshop h3{font-size:2.1rem;margin-bottom:.8rem}
.workshop p{color:rgba(243,236,223,.86)}
.tiers{list-style:none;margin:0 0 1.4rem;padding:0;border-top:1px solid rgba(239,230,214,.3)}
.tiers li{display:flex;justify-content:space-between;gap:1rem;align-items:baseline;padding:1rem 0;border-bottom:1px solid rgba(239,230,214,.3)}
.tiers .t{font-family:var(--display);font-size:1.35rem;line-height:1.25}
.tiers .p{font-family:var(--display);font-size:1.5rem;color:var(--indigo-pale);white-space:nowrap}
.facts{display:flex;flex-wrap:wrap;gap:.5rem;margin:0 0 1.2rem;padding:0;list-style:none}
.note,.facts li{display:inline-block;font-size:.85rem;border:1px solid rgba(239,230,214,.35);padding:.45rem .9rem;border-radius:999px}
.tieng-anh{font-style:italic;font-family:var(--display);font-size:1.15rem}
@media (max-width:760px){.workshop{grid-template-columns:1fr}}

/* đăng ký + thanh toán */
.phieu{background:var(--linen-2);border:1px solid var(--rule);border-radius:4px;padding:clamp(1.2rem,3vw,2rem);margin-top:1.8rem}
.phieu label{display:block;font-weight:400;margin:1.1rem 0 .35rem}
.phieu input[type=text],.phieu input[type=tel],.phieu input[type=number],.phieu textarea{
  width:100%;font:300 1rem/1.5 var(--body);color:var(--ink);background:var(--linen);border:1px solid var(--rule);border-radius:3px;padding:.7rem .8rem}
.chon-lop{border:0;margin:0;padding:0}
.chon-lop legend{font-family:var(--display);font-size:1.5rem;margin-bottom:.6rem;padding:0}
.lua-chon{display:grid!important;grid-template-columns:auto 1fr auto;gap:.2rem .8rem;align-items:baseline;
  border:1px solid var(--rule);border-radius:3px;padding:.9rem 1rem;margin:.5rem 0!important;background:var(--linen);cursor:pointer}
.lua-chon:has(input:checked){border-color:var(--indigo);box-shadow:inset 0 0 0 1px var(--indigo)}
.lua-chon input{accent-color:var(--indigo)}
.lua-chon .ten{font-weight:400;min-width:0}
.lua-chon .gia{font-family:var(--display);font-size:1.25rem;color:var(--indigo);white-space:nowrap}
.lua-chon .mo-ta{grid-column:2 / -1;color:var(--muted);font-size:.88rem}
.nhan-mau{margin-left:.4rem;font:500 .65rem var(--body);letter-spacing:.1em;text-transform:uppercase;background:#f4d58d;color:#3b2c06;padding:.15rem .4rem;border-radius:999px}
.dang-tai{color:var(--muted)}
.bay{position:absolute!important;left:-9999px;width:1px;height:1px;overflow:hidden}
.dong-y{display:flex!important;gap:.6rem;align-items:flex-start;font-size:.92rem;color:var(--muted)}
.dong-y input{margin-top:.35rem;accent-color:var(--indigo)}
.loi{color:var(--err);font-size:.92rem;margin:.8rem 0}
#nut-tao-don{margin-top:1.2rem}
.thanh-toan .chu-tay{margin-bottom:1rem}
.tt-luoi{display:grid;grid-template-columns:auto 1fr;gap:1.5rem;align-items:start}
.tt-luoi > *{min-width:0}
.qr{width:240px;height:auto;aspect-ratio:1;object-fit:contain;background:#fff;border:1px solid var(--rule);border-radius:3px;padding:6px}
.tt-thong-tin{margin:0;display:grid;grid-template-columns:auto 1fr;gap:.35rem 1rem;font-size:.95rem}
.tt-thong-tin dt{color:var(--muted)}
.tt-thong-tin dd{margin:0;overflow-wrap:anywhere}
.tt-thong-tin .to{font-family:var(--display);font-size:1.35rem;color:var(--indigo)}
.tt-thong-tin code.to{font-family:var(--body);font-weight:500;font-size:1.05rem;letter-spacing:.06em}
.nut-chep{margin-left:.4rem;font:500 .72rem var(--body);letter-spacing:.06em;border:1px solid var(--rule);background:var(--linen);color:var(--ink);border-radius:999px;padding:.2rem .6rem;cursor:pointer}
@media (max-width:760px){.tt-luoi{grid-template-columns:1fr}.qr{width:100%;max-width:280px}}
.trang-thai{display:flex;gap:.7rem;align-items:center;margin:1.2rem 0;padding:.8rem 1rem;border-radius:3px;border:1px solid var(--rule);background:var(--linen)}
.trang-thai.xong{border-color:var(--ok);color:var(--ok)}
.trang-thai.thieu{border-color:var(--warn);color:var(--warn)}
.trang-thai.loi{border-color:var(--err);color:var(--err)}
.trang-thai.xong .cham-xoay,.trang-thai.loi .cham-xoay{display:none}
.cham-xoay{flex:none;width:14px;height:14px;border-radius:50%;border:2px solid var(--indigo-pale);border-top-color:var(--indigo);animation:xoay 1s linear infinite}
@keyframes xoay{to{transform:rotate(360deg)}}
@media (prefers-reduced-motion:reduce){.cham-xoay{animation:none}}
.chinh-sach{margin-top:1.6rem;font-size:.95rem}
.chinh-sach p{margin:0 0 .5rem}

/* liên hệ */
.links{list-style:none;padding:0;margin:2rem 0 0;border-top:1px solid var(--rule)}
.links li{border-bottom:1px solid var(--rule)}
.links a{display:grid;grid-template-columns:1fr auto;gap:1rem;align-items:baseline;padding:1.1rem 0;text-decoration:none}
.links .t{font-family:var(--display);font-size:1.45rem;line-height:1.25}
.links .d{font-size:.85rem;color:var(--muted)}
.links a:hover .t{color:var(--indigo)}
@media (max-width:520px){.links a{grid-template-columns:1fr}}
.privacy{padding-left:1.1rem}
.privacy li{margin-bottom:.5rem}

footer{border-top:1px solid var(--rule);padding-block:2.5rem;font-size:.88rem;color:var(--muted)}
footer .bar{flex-wrap:wrap}
footer em{font-family:var(--display);font-size:1.1rem}

/* trang quản lý dùng lại */
.muc{padding-block:2rem}.hep{max-width:46rem;margin:0 auto;padding-inline:16px}
table{border-collapse:collapse;width:100%;font-size:.9rem}th,td{border-bottom:1px solid var(--rule);padding:.5rem;text-align:left}

/* trang con: tiêu đề h1 cỡ như h2 */
.trang-h1{font-size:var(--step-3);margin-block:.7rem 1.4rem}

/* phòng tranh */
.gallery{display:grid;grid-template-columns:repeat(3,1fr);gap:1.2rem;margin-top:2rem}
.gallery figure{margin:0;min-width:0}
.gallery img,.gallery .frame{aspect-ratio:4/5;width:100%;object-fit:cover;border:1px solid var(--rule);border-radius:2px}
.gallery .frame{background:var(--linen-2);display:grid;place-items:center;text-align:center;padding:1rem;color:var(--muted);font-size:.85rem}
.gallery figcaption{font-size:.88rem;margin-top:.5rem;color:var(--muted)}
.gallery figcaption b{display:block;font-family:var(--display);font-size:1.3rem;font-weight:500;color:var(--ink)}
@media (max-width:760px){.gallery{grid-template-columns:1fr 1fr}}
@media (max-width:460px){.gallery{grid-template-columns:1fr}}
.note-ink{display:inline-block;margin-top:1.6rem;font-size:.85rem;border:1px solid var(--rule);padding:.5rem .9rem;border-radius:999px;color:var(--muted)}
.classes .btn{margin-top:.6rem}

/* nút chuyển ngôn ngữ VI / EN */
.lang{font:500 .78rem/1 var(--body);letter-spacing:.12em;text-decoration:none;color:var(--muted);border:1px solid var(--rule);border-radius:999px;padding:.42rem .65rem;margin-left:auto}
.lang:hover{color:var(--ink);border-color:var(--indigo)}
.bar .dk{margin-left:.2rem}

.trang-thai.thu-cong .cham-xoay{display:none}

/* ---- khung xem ảnh phóng to (phong-to.js) — dùng chung mọi trang ---- */
.phong-to{position:fixed;inset:0;z-index:100;background:rgba(6,10,26,.9);display:flex;align-items:center;justify-content:center;padding:clamp(.6rem,3vw,2rem)}
.phong-to[hidden]{display:none}
.pt-khung{background:var(--linen,#efe6d6);color:var(--ink,#1f2a44);border:1px solid var(--rule,#cfc4af);border-radius:10px;box-shadow:0 24px 70px rgba(0,0,0,.55);width:min(1000px,100%);max-height:100%;display:flex;flex-direction:column;overflow:hidden}
.pt-dau{display:flex;justify-content:space-between;align-items:center;padding:.65rem .9rem;border-bottom:1px solid var(--rule,#cfc4af)}
.pt-dem{font-size:.85rem;color:var(--muted,#5d6273);letter-spacing:.06em}
.pt-dong{font:500 .9rem/1 var(--body,sans-serif);padding:.55rem 1rem;border:1px solid var(--indigo,#23366f);border-radius:999px;background:var(--indigo,#23366f);color:var(--on-indigo,#efe6d6);cursor:pointer}
.pt-dong:hover,.pt-dong:focus-visible{background:var(--indigo-deep,#162350)}
.pt-than{display:grid;grid-template-columns:3rem minmax(0,1fr) 3rem;align-items:center;gap:.4rem;padding:.8rem .5rem;min-height:0;overflow:auto}
.pt-than figure{margin:0;display:grid;justify-items:center;gap:.6rem;min-width:0}
.pt-than img{max-width:100%;max-height:calc(100vh - 12rem);width:auto;height:auto;object-fit:contain;border-radius:3px;background:var(--linen-2,#e5d8c2);opacity:0;transition:opacity .25s}
.pt-than img.xong{opacity:1}
.pt-than figcaption{font-family:var(--display,serif);font-size:1.15rem;text-align:center;padding:0 .5rem}
.pt-truoc,.pt-sau{width:2.6rem;height:2.6rem;border-radius:50%;border:1px solid var(--rule,#cfc4af);background:transparent;color:var(--indigo,#23366f);font-size:1.7rem;line-height:1;cursor:pointer}
.pt-truoc:hover,.pt-sau:hover{background:var(--linen-2,#e5d8c2)}
@media (max-width:600px){.pt-than{grid-template-columns:2.2rem minmax(0,1fr) 2.2rem;padding:.6rem .2rem}.pt-truoc,.pt-sau{width:2rem;height:2rem;font-size:1.3rem}.pt-than img{max-height:calc(100vh - 11rem)}}

/* ---- khối thông tin chuyển khoản: xếp dọc, không bẻ chữ giữa từ (sửa lỗi chữ lệch) ---- */
.tt-luoi{grid-template-columns:300px minmax(0,1fr);gap:1.6rem}
.tt-thong-tin{display:block;margin:0}
.tt-thong-tin dt{font-size:.82rem;letter-spacing:.06em;text-transform:uppercase;color:var(--muted);margin:1rem 0 .15rem}
.tt-thong-tin dt:first-child{margin-top:0}
.tt-thong-tin dd{margin:0;overflow-wrap:normal;word-break:normal;font-size:1rem;line-height:1.4}
.tt-thong-tin dd.to,.tt-thong-tin code.to{font-size:1.35rem;line-height:1.3}
.tt-thong-tin code.to{display:inline;letter-spacing:.04em}
.tt-thong-tin .nut-chep{margin-left:.5rem;white-space:nowrap;vertical-align:middle}
#o-qr svg{display:block;width:100%;height:auto}
@media (max-width:760px){.tt-luoi{grid-template-columns:1fr}#o-qr{max-width:300px}}