/* ===== TN AI v3 — nền tảng: phông, màu 2 chế độ, form, bảng, hộp thoại, quản trị ===== */
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@font-face{font-family:"Open Sans";font-style:normal;font-weight:300;font-display:swap;src:url(/assets/fonts/os-latin-ext-300.woff2) format("woff2");unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}
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@font-face{font-family:"Open Sans";font-style:normal;font-weight:400;font-display:swap;src:url(/assets/fonts/os-vietnamese-400.woff2) format("woff2");unicode-range:U+0102-0103,U+0110-0111,U+0128-0129,U+0168-0169,U+01A0-01A1,U+01AF-01B0,U+0300-0301,U+0303-0304,U+0308-0309,U+0323,U+0329,U+1EA0-1EF9,U+20AB}
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@font-face{font-family:"Open Sans";font-style:normal;font-weight:400;font-display:swap;src:url(/assets/fonts/os-latin-400.woff2) format("woff2");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:"Open Sans";font-style:normal;font-weight:600 700;font-display:swap;src:url(/assets/fonts/os-vietnamese-600.woff2) format("woff2");unicode-range:U+0102-0103,U+0110-0111,U+0128-0129,U+0168-0169,U+01A0-01A1,U+01AF-01B0,U+0300-0301,U+0303-0304,U+0308-0309,U+0323,U+0329,U+1EA0-1EF9,U+20AB}
@font-face{font-family:"Open Sans";font-style:normal;font-weight:600 700;font-display:swap;src:url(/assets/fonts/os-latin-ext-600.woff2) format("woff2");unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}
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/* Hai bảng màu KHÁC NHAU (không chỉ đảo màu): ĐÊM = chàm sâu + xanh dương nhạt + ánh vàng; NGÀY = giấy kem ấm + cam san hô + xanh trời. */
:root{--font:"Segoe UI Variable Display","Segoe UI","Open Sans",system-ui,-apple-system,Roboto,sans-serif;--font-ui:"Open Sans","Segoe UI",system-ui,sans-serif;
--bg:#070914;--bg2:#0d1124;--surface:#121631;--surface2:#1a1f40;--text:#eef1fb;--muted:#9ba5c6;--accent:#8ea6ff;--accent2:#6ee7d0;--accent-ink:#090c1c;--hi:#f6cf86;
--border:rgba(160,175,255,.15);--glass:rgba(14,17,38,.62);--shadow:0 24px 60px rgba(0,0,0,.5);--ok:#4ade80;--warn:#fbbf24;--err:#fb7185;
--glow1:rgba(110,130,255,.34);--glow2:rgba(110,231,208,.14);--glow3:rgba(246,207,134,.10);--btn:#f3f5ff;--btn-ink:#0a0d1e;--cta:#8ea6ff;--cta-ink:#08102c;--rim:210,220,255;
--cyan:var(--accent2);--blue:var(--accent);--r:18px;color-scheme:dark}
:root[data-theme=light]{--bg:#f6f1e7;--bg2:#efe7d6;--surface:#fffdf7;--surface2:#f2eadb;--text:#1c2131;--muted:#5d6477;--accent:#e4572a;--accent2:#2a78d4;--accent-ink:#fff;--hi:#ff9f43;
--border:rgba(70,45,10,.15);--glass:rgba(255,251,243,.74);--shadow:0 22px 50px rgba(90,60,20,.16);--ok:#0f7a4c;--warn:#955d05;--err:#b4232f;
--glow1:rgba(255,160,100,.36);--glow2:rgba(90,170,255,.28);--glow3:rgba(255,220,140,.35);--btn:#1c2131;--btn-ink:#fff7ea;--cta:#e4572a;--cta-ink:#fff;--rim:90,60,20;color-scheme:light}
*{box-sizing:border-box}html{scroll-behavior:smooth;background:var(--bg)}
body{margin:0;background:transparent;color:var(--text);font:400 16px/1.65 var(--font);min-height:100vh;display:flex;flex-direction:column;overflow-x:hidden;-webkit-font-smoothing:antialiased;letter-spacing:.005em}
main{flex:1}main:focus{outline:none}a{color:var(--accent2);text-decoration:none}a:hover{text-decoration:underline}
img{max-width:100%;height:auto;display:block}
h1,h2,h3{line-height:1.18;margin:0 0 .5em;font-weight:300;letter-spacing:-.02em}h1{font-size:clamp(2rem,4.4vw,3.2rem)}h2{font-size:clamp(1.5rem,3vw,2.2rem)}h3{font-size:1.15rem;font-weight:600;letter-spacing:-.005em}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:8px}
.wrap{width:min(1200px,100% - 32px);margin-inline:auto}.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.muted{color:var(--muted)}.row{display:flex;gap:12px;align-items:center;flex-wrap:wrap}.grow{flex:1}.sp{height:24px}
/* nền khí quyển, mỗi chế độ một sắc */
body::before{content:"";position:fixed;inset:-10%;z-index:-2;pointer-events:none;background:radial-gradient(44% 40% at 10% 6%,var(--glow1),transparent 70%),radial-gradient(40% 38% at 92% 16%,var(--glow2),transparent 70%),radial-gradient(48% 42% at 58% 100%,var(--glow3),transparent 72%),var(--bg);animation:drift 30s ease-in-out infinite alternate}
@keyframes drift{to{transform:translate3d(-2%,1.5%,0) scale(1.05)}}
body::after{content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;opacity:.35;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 .5 0 0 0 0 .5 0 0 0 0 .5 0 0 0 .5 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");mix-blend-mode:soft-light}
::view-transition-old(root),::view-transition-new(root){animation:none;mix-blend-mode:normal}::view-transition-old(root){z-index:1}::view-transition-new(root){z-index:2}
/* nút & ô nhập */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:10px 22px;border-radius:999px;border:1px solid var(--border);background:var(--glass);backdrop-filter:blur(10px);color:var(--text);font:600 .92rem var(--font-ui);cursor:pointer;transition:transform .15s,box-shadow .25s,background .25s,border-color .25s}
.btn:hover{text-decoration:none;border-color:var(--accent);box-shadow:0 8px 24px rgba(var(--rim),.12)}.btn:active{transform:scale(.97)}
.btn.primary{background:var(--btn);color:var(--btn-ink);border-color:transparent}.btn.primary:hover{box-shadow:0 12px 30px rgba(var(--rim),.28);transform:translateY(-1px)}
.btn.accent{background:var(--cta);color:var(--cta-ink);border-color:transparent}.btn.danger{color:var(--err)}.btn.sm{min-height:34px;padding:5px 14px;font-size:.82rem}.btn[disabled]{opacity:.5;cursor:not-allowed;transform:none;box-shadow:none}
input,select,textarea{width:100%;min-height:46px;background:var(--surface);color:var(--text);border:1px solid var(--border);border-radius:14px;padding:10px 14px;font:inherit;transition:border-color .2s,box-shadow .2s}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 4px rgba(var(--rim),.12)}
input[type=file]{padding:8px;min-height:0}input[type=checkbox]{width:auto;min-height:0}select{appearance:none;background-image:linear-gradient(45deg,transparent 50%,currentColor 50%),linear-gradient(135deg,currentColor 50%,transparent 50%);background-position:calc(100% - 20px) 50%,calc(100% - 15px) 50%;background-size:5px 5px;background-repeat:no-repeat;padding-right:38px}
select option{background:var(--surface);color:var(--text)}
textarea{min-height:110px;resize:vertical}label{display:block;font-size:.86rem;color:var(--muted);margin:14px 0 5px}
.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--r);padding:22px;box-shadow:inset 0 1px rgba(var(--rim),.06)}
.msg{padding:11px 15px;border-radius:14px;margin:12px 0;border:1px solid var(--border);background:var(--surface2)}
.msg.err{border-color:var(--err);color:var(--err)}.msg.ok{border-color:var(--ok);color:var(--ok)}.msg.warn{border-color:var(--warn);color:var(--warn)}
.pill{background:var(--surface2);border:1px solid var(--border);border-radius:99px;padding:5px 12px;font-size:.88rem;color:var(--text)}
.badge-n{background:var(--accent);color:var(--accent-ink);border-radius:99px;padding:0 7px;font-size:.74rem;margin-left:6px;font-weight:700}
.price{font-weight:600;color:var(--accent2);font-size:1.05rem}.old{color:var(--muted);text-decoration:line-through;margin-left:8px;font-weight:400;font-size:.9rem}
.tag{display:inline-block;font-size:.72rem;padding:2px 10px;border-radius:99px;border:1px solid var(--border);color:var(--muted);margin-right:6px;letter-spacing:.02em}
.tag.new{color:var(--accent2);border-color:var(--accent2)}.tag.sale,.tag.demo{color:var(--warn);border-color:var(--warn)}.tag.free{color:var(--ok);border-color:var(--ok)}
/* bảng */
.tbl{width:100%;border-collapse:collapse;font-size:.92rem}.tbl th,.tbl td{text-align:left;padding:11px 12px;border-bottom:1px solid var(--border);vertical-align:top}.tbl th{color:var(--muted);font-weight:600;font-size:.8rem;letter-spacing:.04em;text-transform:uppercase}
.scroll-x{overflow-x:auto}.status{font-weight:600}.status.completed,.status.approved,.status.paid{color:var(--ok)}.status.pending_payment,.status.pending_review,.status.awaiting_transfer{color:var(--warn)}.status.expired,.status.cancelled,.status.rejected,.status.refunded{color:var(--err)}
.stat{display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:14px}.stat .card b{display:block;font-size:1.6rem;font-weight:300}
.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px}
.empty{text-align:center;padding:56px 16px;color:var(--muted);border:1px dashed var(--border);border-radius:var(--r)}.copy{font-family:ui-monospace,Consolas,monospace;background:var(--surface2);padding:2px 8px;border-radius:8px;font-size:.88em}
.bar{height:6px;border-radius:99px;background:var(--surface2);overflow:hidden}.bar i{display:block;height:100%;background:var(--accent);width:0;transition:width .15s}
#toasts{position:fixed;left:50%;transform:translateX(-50%);bottom:calc(88px + env(safe-area-inset-bottom));z-index:90;display:flex;flex-direction:column;gap:8px;width:min(420px,92vw)}
.toast{background:var(--surface2);border:1px solid var(--border);padding:12px 16px;border-radius:14px;box-shadow:var(--shadow);animation:in .25s}.toast.err{border-color:var(--err)}.toast.ok{border-color:var(--ok)}
@keyframes in{from{opacity:0;transform:translateY(8px)}}
.skel{background:linear-gradient(90deg,var(--surface) 25%,var(--surface2) 50%,var(--surface) 75%);background-size:200% 100%;animation:sh 1.4s infinite;border-radius:var(--r);min-height:220px}@keyframes sh{to{background-position:-200% 0}}
/* hộp thoại (admin: duyệt nạp, nhập liệu) */
.modal-back{position:fixed;inset:0;z-index:100;display:grid;place-items:center;padding:16px;background:rgba(5,7,16,.6);backdrop-filter:blur(8px);animation:fade .2s}
@keyframes fade{from{opacity:0}}
.modal{width:min(520px,100%);max-height:92vh;overflow:auto;background:var(--surface);border:1px solid var(--border);border-radius:24px;padding:26px;box-shadow:var(--shadow);animation:pop .28s cubic-bezier(.2,.9,.3,1.2)}
@keyframes pop{from{opacity:0;transform:translateY(14px) scale(.97)}}
.modal h3{font-size:1.3rem;font-weight:300;margin-bottom:4px}.modal .kv{display:grid;grid-template-columns:auto 1fr;gap:6px 18px;margin:14px 0;padding:14px;border-radius:14px;background:var(--surface2)}.modal .kv dt{color:var(--muted)}.modal .kv dd{margin:0;font-weight:600;word-break:break-all}
.modal .big{font-size:2rem;font-weight:300;letter-spacing:-.02em}.modal .acts{display:flex;gap:10px;justify-content:flex-end;margin-top:18px;flex-wrap:wrap}
/* quản trị */
.admin{display:grid;grid-template-columns:210px 1fr;gap:24px;margin:24px 0}@media(max-width:820px){.admin{grid-template-columns:1fr}}
.side{display:flex;flex-direction:column;gap:4px;position:sticky;top:84px;align-self:start}.side button{text-align:left;background:none;border:0;color:var(--text);padding:10px 14px;border-radius:12px;font:inherit;cursor:pointer;min-height:44px}
.side button[aria-current=true]{background:var(--surface2);color:var(--accent2);font-weight:600}@media(max-width:820px){.side{flex-direction:row;overflow-x:auto;position:static}}
.two{display:grid;grid-template-columns:1fr 1fr;gap:0 16px}@media(max-width:700px){.two{grid-template-columns:1fr}}
.drop{border:2px dashed var(--border);border-radius:18px;padding:22px;text-align:center;color:var(--muted);transition:border-color .2s,background .2s;cursor:pointer}.drop.over{border-color:var(--accent);background:rgba(var(--rim),.06);color:var(--text)}
.assets{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:12px;margin-top:14px}.asset{position:relative;border:1px solid var(--border);border-radius:14px;overflow:hidden;background:var(--surface2)}
.asset img,.asset video{width:100%;aspect-ratio:4/3;object-fit:cover}.asset .acts{display:flex;gap:4px;padding:6px;flex-wrap:wrap}.asset .badge{position:absolute;top:6px;left:6px;background:var(--accent);color:var(--accent-ink);font-size:.7rem;font-weight:700;padding:2px 8px;border-radius:99px}
.filerow{display:flex;gap:10px;align-items:center;padding:10px 12px;border:1px solid var(--border);border-radius:12px;margin-top:8px;flex-wrap:wrap}.filerow.old{opacity:.55}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important;scroll-behavior:auto!important}}
body.reduce *{animation:none!important}

/* admin: ô ảnh trang chủ, dòng tải lên */
.slot-row{display:flex;gap:16px;align-items:flex-start;flex-wrap:wrap}.slot-prev{width:150px;aspect-ratio:3/4;object-fit:cover;border-radius:14px;border:1px solid var(--border);background:var(--surface2)}
.filerow.failed{border-color:var(--err)}.err-text{color:var(--err)}.drop.busy{opacity:.6;pointer-events:none}.filerow .bar{width:120px}
.adm-wrap{padding-top:22px;padding-bottom:60px}
form.card h3{margin:26px 0 6px}form.card h3:first-child{margin-top:0}