:root{
  --bg-glow:#2d1b69; --bg:#000; --bg-base:#070611;
  --card-top:rgba(255,255,255,.055); --card-bot:rgba(255,255,255,.02);
  --border:rgba(255,255,255,.1); --border-soft:rgba(255,255,255,.07);
  --input-bg:rgba(0,0,0,.32); --input-border:rgba(255,255,255,.16);
  --accent1:#6366f1; --accent2:#8b5cf6; --violet:#7c5cff;
  --text:#fff; --muted:rgba(255,255,255,.66); --muted2:rgba(255,255,255,.42);
  --radius:20px; --radius-sm:13px;
  --space:1rem;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  min-height:100vh;color:var(--text);
  font-family:'Inter',Arial,system-ui,sans-serif;-webkit-font-smoothing:antialiased;letter-spacing:.1px;
  background:
    radial-gradient(1000px circle at 50% -8%, var(--bg-glow) 0%, rgba(45,27,105,0) 55%),
    radial-gradient(700px circle at 85% 110%, rgba(124,92,255,.12) 0%, rgba(124,92,255,0) 60%),
    var(--bg-base);
  background-attachment:fixed;
}

/* nav */
.nav{position:sticky;top:0;z-index:10;display:flex;align-items:center;justify-content:space-between;
  padding:.8rem 1.75rem;background:rgba(10,8,20,.72);backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);border-bottom:1px solid var(--border-soft)}
.brand{display:flex;align-items:center;gap:.6rem;font-weight:700;font-size:1.12rem;color:#fff;text-decoration:none}
.brand .logo{height:34px;width:auto;display:block;border-radius:8px}
.langs{display:flex;gap:.3rem;align-items:center}
.langs select{appearance:none;-webkit-appearance:none;cursor:pointer;padding:.34rem 2rem .34rem .8rem;border-radius:10px;border:1px solid rgba(255,255,255,.14);background:rgba(255,255,255,.05);color:#fff;font-size:.82rem;font-weight:600;font-family:inherit;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%23a9aec4' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right .7rem center;transition:border-color .15s,background-color .15s}
.langs select:hover{border-color:rgba(124,92,255,.5);background-color:rgba(255,255,255,.08)}
.langs select:focus{outline:none;border-color:var(--violet);box-shadow:0 0 0 3px rgba(124,92,255,.25)}
.langs select option{background:#1a1d2e;color:#fff}

/* Pill "Danh Sách Model AI" dưới thanh logo */
.topbar-cta{display:flex;justify-content:center;padding:1.1rem 1.25rem 0}
.model-list-link{display:inline-flex;align-items:center;gap:.55rem;padding:.55rem 1.25rem;border-radius:999px;
  font-size:.92rem;font-weight:700;color:#fff;text-decoration:none;letter-spacing:.2px;
  background:linear-gradient(135deg,rgba(99,102,241,.22),rgba(139,92,246,.22));
  border:1px solid rgba(124,92,255,.45);box-shadow:0 6px 22px rgba(124,92,255,.22);
  transition:transform .15s,box-shadow .15s,border-color .15s,background .15s}
.model-list-link:hover{transform:translateY(-1px);border-color:rgba(124,92,255,.8);
  background:linear-gradient(135deg,rgba(99,102,241,.34),rgba(139,92,246,.34));box-shadow:0 10px 28px rgba(124,92,255,.34)}
.model-list-link .arrow{opacity:.85;transition:transform .15s}
.model-list-link:hover .arrow{transform:translateX(3px)}

/* Đoạn giới thiệu SEO cuối trang */
.seo-article{margin-top:.5rem;padding-top:1.6rem;border-top:1px solid var(--border-soft);color:var(--muted)}
.seo-article h2{margin:0 0 .9rem;font-size:1.15rem;font-weight:700;color:var(--text);letter-spacing:-.2px}
.seo-article p{margin:0 0 .85rem;font-size:.92rem;line-height:1.75}
.seo-article p:last-child{margin-bottom:0}

/* layout */
.wrap{max-width:860px;margin:2.5rem auto 4rem;padding:0 1.25rem;display:flex;flex-direction:column;gap:1.5rem}

.hero{text-align:center;margin:.5rem 0 .25rem}
.hero h1{margin:0;font-size:clamp(1.7rem,4vw,2.2rem);font-weight:800;line-height:1.2;letter-spacing:-.4px;
  background:linear-gradient(180deg,#fff 0%,#cabfff 130%);-webkit-background-clip:text;background-clip:text;
  -webkit-text-fill-color:transparent}
.hero .subtitle{margin:.7rem auto 0;max-width:560px;color:var(--muted);font-size:1rem;line-height:1.6}
.hero .promo{margin:.9rem auto 0;max-width:620px;color:#f4c97a;font-size:.92rem;line-height:1.55}
.share{display:flex;justify-content:center;gap:.6rem;margin-top:1rem;flex-wrap:wrap}
.share-btn{display:inline-flex;align-items:center;gap:.45rem;border:1px solid var(--border);
  background:rgba(255,255,255,.05);color:#fff;border-radius:10px;padding:.5rem .95rem;
  font-size:.85rem;font-weight:600;cursor:pointer;text-decoration:none;font-family:inherit;
  transition:background .15s,border-color .15s,transform .1s}
.share-btn:hover{background:rgba(255,255,255,.1);transform:translateY(-1px)}
.share-btn:active{transform:translateY(0)}
.share-btn svg{flex:0 0 auto}
.share-btn.fb{background:#1877f2;border-color:#1877f2}
.share-btn.fb:hover{background:#1568d8}

/* cards with a subtle top accent line */
.card{position:relative;background:linear-gradient(180deg,var(--card-top),var(--card-bot));
  border:1px solid var(--border);border-radius:var(--radius);padding:2.25rem 2.5rem;
  box-shadow:0 24px 70px rgba(0,0,0,.5),inset 0 1px 0 rgba(255,255,255,.06)}
.card::before{content:"";position:absolute;inset:0 0 auto 0;height:1px;border-radius:var(--radius) var(--radius) 0 0;
  background:linear-gradient(90deg,transparent,rgba(139,92,246,.6),transparent)}

/* form */
form{display:flex;flex-direction:column}
form>label{margin:0 0 .5rem;font-weight:600;font-size:.88rem;color:rgba(255,255,255,.8);text-align:center}
form>label:not(:first-child){margin-top:1.5rem}
textarea{width:100%;background:var(--input-bg);border:1px solid var(--input-border);
  border-radius:var(--radius-sm);color:#fff;padding:.95rem 1rem;font-size:1rem;font-family:inherit;
  min-height:190px;resize:vertical;line-height:1.6;transition:border-color .15s,box-shadow .15s,background .15s}
textarea:hover{border-color:rgba(255,255,255,.28)}
textarea:focus{outline:none;border-color:var(--accent2);background:rgba(0,0,0,.42);
  box-shadow:0 0 0 3px rgba(139,92,246,.28)}
textarea::placeholder{color:var(--muted2)}
.counter{align-self:flex-end;color:var(--muted2);font-size:.8rem;margin-top:.4rem;font-variant-numeric:tabular-nums}

/* custom file picker (native input hidden) */
/* input file ẩn kiểu visually-hidden (vẫn render -> iOS Safari mở được trình chọn) */
.vh-input{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;
  clip:rect(0,0,0,0);white-space:nowrap;border:0;opacity:0}
.file-field{display:flex;align-items:center;gap:.85rem;background:var(--input-bg);
  border:1px solid var(--input-border);border-radius:var(--radius-sm);padding:.5rem .6rem;transition:border-color .15s}
.file-field:hover{border-color:rgba(255,255,255,.28)}
.file-field.has-file{border-color:rgba(139,92,246,.4)}
.file-btn{margin:0;display:inline-block;background:var(--violet);color:#fff;border-radius:9px;
  padding:.55rem 1.05rem;font-weight:600;cursor:pointer;white-space:nowrap;transition:filter .15s,transform .1s}
.file-btn:hover{filter:brightness(1.12)}
.file-btn:active{transform:scale(.97)}
.file-name{color:var(--muted);font-size:.9rem;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.file-field.has-file .file-name{color:#fff}
.hint{color:var(--muted2);font-size:.8rem;margin-top:.5rem}

.btn{margin-top:1.75rem;display:inline-flex;align-items:center;justify-content:center;gap:.55rem;
  background:linear-gradient(135deg,var(--accent1),var(--accent2));color:#fff;border:0;border-radius:var(--radius-sm);
  padding:1rem;font-size:1.05rem;font-weight:700;cursor:pointer;letter-spacing:.2px;
  box-shadow:0 8px 22px rgba(124,92,255,.32);transition:transform .12s ease,box-shadow .2s ease,filter .15s}
.btn svg{flex:0 0 auto}
.btn:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 14px 34px rgba(124,92,255,.5);filter:brightness(1.05)}
.btn:active:not(:disabled){transform:translateY(0)}
.btn:disabled{opacity:.45;cursor:not-allowed;box-shadow:none}
#msg{text-align:center;color:#ffb1b1;min-height:1.2em;margin:.8rem 0 0;font-size:.92rem}
/* Báo lỗi validate nổi bật: khung pill đỏ + icon + rung */
#msg.error{
  display:flex;align-items:center;gap:.5rem;width:fit-content;max-width:100%;
  margin:.9rem auto 0;padding:.62rem 1.05rem;border-radius:12px;
  color:#ffe0e0;font-weight:600;line-height:1.35;text-align:left;
  background:rgba(239,68,68,.16);border:1px solid rgba(239,68,68,.5);
  box-shadow:0 8px 24px rgba(239,68,68,.22);
  animation:shake .42s cubic-bezier(.36,.07,.19,.97);
}
#msg.error::before{content:"⚠";font-size:1.05em;flex:none}
@keyframes shake{
  10%,90%{transform:translateX(-1px)}
  20%,80%{transform:translateX(3px)}
  30%,50%,70%{transform:translateX(-6px)}
  40%,60%{transform:translateX(6px)}
}
.invalid{animation:shake .42s cubic-bezier(.36,.07,.19,.97)}
textarea.invalid,.file-field.invalid{
  border-color:rgba(239,68,68,.75)!important;
  box-shadow:0 0 0 3px rgba(239,68,68,.2)!important;
}
@media (prefers-reduced-motion:reduce){ #msg.error,.invalid{animation:none} }

/* list card */
.list-head{display:flex;align-items:center;justify-content:center;gap:.6rem;margin-bottom:1.35rem}
.list-head h2{margin:0;font-size:1.3rem;font-weight:700}
.count-pill{font-size:.78rem;font-weight:600;color:#c4b5fd;background:rgba(124,92,255,.18);
  border:1px solid rgba(124,92,255,.3);padding:.1rem .55rem;border-radius:20px;min-width:1.4rem;text-align:center}
#jobs{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:.7rem;min-height:64px}
#jobs:empty::after{content:attr(data-empty);display:flex;align-items:center;justify-content:center;
  color:var(--muted2);font-size:.92rem;min-height:64px}
#jobs li{background:rgba(0,0,0,.26);border:1px solid var(--border-soft);border-radius:var(--radius-sm);
  padding:.85rem 1rem;display:flex;align-items:center;gap:.75rem;flex-wrap:wrap;
  transition:border-color .15s,background .15s,transform .1s}
#jobs li:hover{border-color:rgba(139,92,246,.45);background:rgba(139,92,246,.07)}
.badge{font-size:.7rem;padding:.24rem .68rem;border-radius:20px;font-weight:600;letter-spacing:.4px;
  background:rgba(124,92,255,.22);color:#c4b5fd;white-space:nowrap}
.badge.done{background:rgba(46,204,113,.18);color:#74e2a3}
.badge.failed{background:rgba(231,76,60,.18);color:#f0a79d}
.badge.proc{display:inline-flex;align-items:center;gap:.35rem}
.badge .spin{display:inline-block;width:10px;height:10px;border:2px solid rgba(196,181,253,.4);
  border-top-color:#c4b5fd;border-radius:50%;animation:spin .7s linear infinite}
.job-title{flex:1;min-width:150px;color:rgba(255,255,255,.9);font-size:.93rem;line-height:1.4}
audio{height:38px;max-width:100%}
.dl-btn{display:inline-flex;align-items:center;gap:.35rem;background:rgba(124,92,255,.15);
  border:1px solid rgba(124,92,255,.35);color:#c4b5fd;border-radius:10px;padding:.4rem .8rem;
  font-size:.85rem;font-weight:600;text-decoration:none;transition:background .15s,color .15s}
.dl-btn:hover{background:rgba(124,92,255,.3);color:#fff}
.dl-btn svg{flex:0 0 auto}

.pager{display:flex;align-items:center;justify-content:center;gap:1rem;margin-top:1.5rem}
.page-btn{width:40px;height:40px;border-radius:11px;border:1px solid var(--border);background:rgba(255,255,255,.04);
  color:#fff;font-size:1.25rem;line-height:1;cursor:pointer;transition:background .15s,border-color .15s,transform .1s}
.page-btn:hover:not(:disabled){background:rgba(139,92,246,.2);border-color:rgba(139,92,246,.5)}
.page-btn:active:not(:disabled){transform:scale(.95)}
.page-btn:disabled{opacity:.32;cursor:not-allowed}
.page-info{color:var(--muted);font-size:.88rem;min-width:72px;text-align:center;font-variant-numeric:tabular-nums}

/* button loading spinner */
@keyframes spin{to{transform:rotate(360deg)}}
.btn .spinner{display:none;width:18px;height:18px;border:2px solid rgba(255,255,255,.4);
  border-top-color:#fff;border-radius:50%;animation:spin .7s linear infinite}
.btn.loading .spinner{display:inline-block}
.btn.loading .btn-icon{display:none}

/* model ads grid (giống trang chủ aidancing) */
.models-card{padding:1.75rem 2rem 2rem}
.models-title{text-align:center;font-size:1.3rem;font-weight:700;margin:0 0 1.5rem}
.model-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:1.1rem}
.model-card{display:flex;flex-direction:column;gap:.7rem;background:rgba(0,0,0,.25);
  border:1px solid var(--border-soft);border-radius:16px;padding:.9rem;cursor:pointer;
  transition:border-color .15s,transform .12s,background .15s}
.model-card:hover{border-color:rgba(139,92,246,.45);background:rgba(139,92,246,.06);transform:translateY(-2px)}
.model-title{display:flex;align-items:flex-start;gap:.4rem;font-size:.9rem;font-weight:600;
  line-height:1.35;color:#fff;min-height:2.5em}
.model-title .star{color:#c4b5fd;flex:0 0 auto}
.model-video{position:relative;aspect-ratio:16/9;border-radius:12px;overflow:hidden;background:#000}
.model-video video{width:100%;height:100%;object-fit:cover;display:block}
.model-cta{margin-top:auto;text-align:center;background:linear-gradient(135deg,var(--accent1),var(--accent2));
  color:#fff;border-radius:10px;padding:.6rem;font-weight:600;font-size:.9rem;text-decoration:none;
  transition:filter .15s,transform .1s}
.model-cta:hover{filter:brightness(1.08);transform:translateY(-1px)}
@media(max-width:560px){.model-grid{grid-template-columns:1fr;gap:.8rem}}

[dir=rtl] .nav{flex-direction:row-reverse}
@media(max-width:560px){
  .card{padding:1.6rem 1.25rem}h1{font-size:1.55rem}.nav{padding:.7rem 1rem}
  .wrap{margin:1.75rem auto 3rem;gap:1.1rem}
}