/* ===================== Theme tokens ===================== */
:root{
  --bg: #f6f7fb;
  --bg-soft: #ffffff;
  --card: #ffffff;
  --text: #11131a;
  --text-soft: #5b6072;
  --muted: #8a8fa3;
  --border: #e8eaf1;
  --border-strong: #d8dbe7;

  --brand: #6d5efc;
  --brand-2: #9b6dff;
  --brand-ink: #4a3ae0;
  --grad: linear-gradient(120deg,#6d5efc 0%,#9b6dff 50%,#5ad1ff 100%);
  --grad-soft: linear-gradient(120deg,rgba(109,94,252,.12),rgba(90,209,255,.12));

  --ok:#16a34a; --err:#e23b54;
  --shadow-sm: 0 1px 2px rgba(20,22,40,.06);
  --shadow: 0 12px 30px -12px rgba(60,50,160,.28);
  --shadow-lg: 0 30px 70px -24px rgba(60,50,160,.40);
  --radius: 18px;
  --radius-sm: 12px;
  --maxw: 1080px;
}
[data-theme="dark"]{
  --bg:#0c0d14;
  --bg-soft:#12131d;
  --card:#161826;
  --text:#eef0f7;
  --text-soft:#aab0c4;
  --muted:#7a8099;
  --border:#23263a;
  --border-strong:#2e3252;
  --grad-soft: linear-gradient(120deg,rgba(109,94,252,.16),rgba(90,209,255,.14));
  --shadow: 0 14px 34px -12px rgba(0,0,0,.6);
  --shadow-lg: 0 30px 80px -20px rgba(0,0,0,.7);
}

/* ===================== Base ===================== */
*{box-sizing:border-box;margin:0;padding:0}
[hidden]{display:none!important}   /* hidden luôn thắng các rule display */
html{scroll-behavior:smooth}
body{
  font-family:'Plus Jakarta Sans',system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
  background:var(--bg);
  color:var(--text);
  line-height:1.55;
  -webkit-font-smoothing:antialiased;
  transition:background .3s ease,color .3s ease;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 20px}

/* ===================== Header ===================== */
.nav{
  position:sticky;top:0;z-index:50;
  backdrop-filter:saturate(180%) blur(14px);
  background:color-mix(in srgb,var(--bg) 78%,transparent);
  border-bottom:1px solid var(--border);
}
.nav-inner{display:flex;align-items:center;gap:18px;height:64px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:1.18rem}
.brand-mark{
  width:36px;height:36px;border-radius:11px;display:grid;place-items:center;
  background:var(--grad);color:#fff;box-shadow:var(--shadow-sm)
}
.brand-name span{color:var(--brand)}
.nav-links{display:flex;gap:6px;margin-left:auto}
.nav-links a{
  padding:8px 14px;border-radius:10px;font-weight:600;font-size:.94rem;color:var(--text-soft);
  transition:.18s
}
.nav-links a:hover{color:var(--text);background:var(--grad-soft)}
.nav-actions{display:flex;gap:8px;align-items:center;margin-left:6px}
.icon-btn{
  width:40px;height:40px;border-radius:11px;border:1px solid var(--border);
  background:var(--bg-soft);color:var(--text);cursor:pointer;display:grid;place-items:center;
  transition:.18s
}
.icon-btn:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-1px)}
.ico-moon{display:none}
[data-theme="dark"] .ico-sun{display:none}
[data-theme="dark"] .ico-moon{display:block}
.nav-burger{display:none}

/* ===================== Hero ===================== */
.hero{position:relative;overflow:hidden;padding:64px 0 30px;text-align:center}
.hero-glow{
  position:absolute;inset:auto 0 auto 0;top:-180px;height:520px;pointer-events:none;
  background:radial-gradient(60% 60% at 50% 30%,rgba(109,94,252,.30),transparent 70%);
  filter:blur(10px);z-index:0
}
.hero-inner{position:relative;z-index:1}
.badge{
  display:inline-flex;align-items:center;gap:8px;
  padding:7px 14px;border-radius:999px;font-size:.84rem;font-weight:600;
  background:var(--bg-soft);border:1px solid var(--border);color:var(--text-soft);
  box-shadow:var(--shadow-sm)
}
.badge .dot{width:8px;height:8px;border-radius:50%;background:var(--ok);box-shadow:0 0 0 4px color-mix(in srgb,var(--ok) 25%,transparent)}
.hero-title{
  margin:22px auto 14px;font-size:clamp(2rem,5vw,3.4rem);line-height:1.12;font-weight:800;letter-spacing:-.02em;max-width:760px
}
.grad{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-sub{max-width:560px;margin:0 auto;color:var(--text-soft);font-size:clamp(1rem,2.2vw,1.12rem)}

/* Download box */
.dl-box{
  display:flex;align-items:center;gap:8px;
  max-width:680px;margin:30px auto 0;padding:8px;
  background:var(--card);border:1px solid var(--border-strong);
  border-radius:999px;box-shadow:var(--shadow);
  transition:box-shadow .25s,border-color .25s,transform .25s
}
.dl-box:focus-within{border-color:var(--brand);box-shadow:var(--shadow-lg);transform:translateY(-2px)}
.dl-platform{
  width:44px;height:44px;flex:none;border-radius:50%;display:grid;place-items:center;
  color:var(--muted);background:var(--grad-soft);transition:.2s
}
.dl-platform.active{color:#fff;background:var(--grad)}
.dl-input{
  flex:1;min-width:0;border:none;outline:none;background:transparent;
  font-size:1.02rem;color:var(--text);font-family:inherit;padding:0 4px
}
.dl-input::placeholder{color:var(--muted)}
.dl-paste{
  display:inline-flex;align-items:center;gap:6px;flex:none;
  border:1px solid var(--border);background:var(--bg-soft);color:var(--text-soft);
  padding:0 14px;height:44px;border-radius:999px;font-weight:600;font-size:.9rem;cursor:pointer;
  font-family:inherit;transition:.18s
}
.dl-paste:hover{color:var(--brand);border-color:var(--brand)}
.dl-submit{
  position:relative;flex:none;border:none;cursor:pointer;font-family:inherit;
  height:48px;padding:0 26px;border-radius:999px;font-weight:700;font-size:1rem;color:#fff;
  background:var(--grad);background-size:160% 160%;
  box-shadow:0 10px 24px -8px rgba(109,94,252,.7);transition:.22s
}
.dl-submit:hover{transform:translateY(-1px);background-position:100% 0;box-shadow:0 14px 30px -8px rgba(109,94,252,.85)}
.dl-submit:active{transform:translateY(0)}
.dl-submit.loading .dl-submit-text{opacity:0}
.dl-spinner{
  position:absolute;inset:0;margin:auto;width:20px;height:20px;border-radius:50%;
  border:2.5px solid rgba(255,255,255,.4);border-top-color:#fff;opacity:0;
}
.dl-submit.loading .dl-spinner{opacity:1;animation:spin .7s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

/* Ghi chú đăng nhập tải 4K */
.dl-hint{display:flex;align-items:center;justify-content:center;gap:7px;margin-top:14px;
  color:var(--muted);font-size:.88rem;font-weight:500}
.dl-hint svg{color:#a78bfa;flex:none}
.dl-hint b{color:var(--text);font-weight:700}

/* Platforms chips */
.platforms{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;align-items:center;margin-top:22px}
.platforms-label{color:var(--muted);font-size:.86rem;font-weight:600}
.chip{
  padding:6px 13px;border-radius:999px;font-size:.82rem;font-weight:600;
  background:var(--bg-soft);border:1px solid var(--border);color:var(--text-soft)
}

/* ===================== Result ===================== */
.result-wrap{margin-top:14px;animation:fadeUp .4s ease}
.result-card{
  display:flex;gap:22px;background:var(--card);border:1px solid var(--border);
  border-radius:var(--radius);padding:18px;box-shadow:var(--shadow)
}
.result-thumb{position:relative;flex:none;width:300px;border-radius:var(--radius-sm);overflow:hidden;background:var(--bg)}
.result-thumb img{width:100%;height:100%;object-fit:cover;aspect-ratio:16/9}
.result-duration{
  position:absolute;right:8px;bottom:8px;background:rgba(0,0,0,.78);color:#fff;
  padding:3px 8px;border-radius:7px;font-size:.78rem;font-weight:600
}
.result-info{flex:1;min-width:0;display:flex;flex-direction:column}
.result-title{font-size:1.12rem;font-weight:700;line-height:1.35;margin-bottom:6px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.result-meta{display:flex;gap:10px;flex-wrap:wrap;color:var(--text-soft);font-size:.9rem;margin-bottom:16px}
.result-src{padding:2px 9px;border-radius:7px;background:var(--grad-soft);color:var(--brand-ink);font-weight:600;font-size:.8rem}
[data-theme="dark"] .result-src{color:var(--brand-2)}
.result-formats{display:flex;flex-direction:column;gap:9px;margin-top:auto}
.fmt{
  display:flex;align-items:center;gap:12px;
  border:1px solid var(--border);border-radius:12px;padding:11px 14px;background:var(--bg-soft);
  transition:.18s
}
.fmt:hover{border-color:var(--brand);background:var(--grad-soft)}
.fmt-tag{font-weight:700;font-size:.82rem;padding:3px 9px;border-radius:7px;background:var(--grad);color:#fff}
.fmt-tag.audio{background:#16a34a}
.fmt-label{font-weight:600;font-size:.92rem}
.fmt-size{margin-left:auto;color:var(--muted);font-size:.84rem}
.fmt-dl{
  flex:none;display:inline-flex;align-items:center;gap:6px;
  border:none;cursor:pointer;font-family:inherit;font-weight:700;font-size:.86rem;color:#fff;
  background:var(--brand);padding:8px 16px;border-radius:9px;transition:.18s
}
.fmt-dl:hover{background:var(--brand-ink);transform:translateY(-1px)}
/* Chất lượng cao bị khóa cho khách */
.fmt-locked{opacity:.85}
.fmt-locked .fmt-label{color:var(--muted)}
.fmt-dl.locked{background:transparent;color:#a78bfa;border:1px solid #a78bfa}
.fmt-dl.locked:hover{background:#a78bfa;color:#fff}

/* Error */
.result-error{
  display:flex;align-items:center;gap:10px;justify-content:center;
  background:color-mix(in srgb,var(--err) 10%,var(--card));
  border:1px solid color-mix(in srgb,var(--err) 35%,transparent);
  color:var(--err);font-weight:600;padding:18px;border-radius:var(--radius)
}

/* Skeleton */
.skeleton .sk-thumb,.skeleton .sk-line{
  position:relative;overflow:hidden;background:var(--bg);border-radius:10px
}
.skeleton .sk-thumb{width:300px;flex:none;aspect-ratio:16/9}
.skeleton .sk-body{flex:1;display:flex;flex-direction:column;gap:13px;padding:6px 0}
.sk-line{height:16px}
.sk-line.w70{width:70%}.sk-line.w40{width:40%}.sk-line.w90{width:90%}.sk-line.w60{width:60%}
.skeleton .sk-thumb::after,.skeleton .sk-line::after{
  content:"";position:absolute;inset:0;transform:translateX(-100%);
  background:linear-gradient(90deg,transparent,color-mix(in srgb,var(--text) 8%,transparent),transparent);
  animation:shimmer 1.3s infinite
}
@keyframes shimmer{100%{transform:translateX(100%)}}

/* ===================== Sections ===================== */
.section{padding:54px 20px}
.section-title{text-align:center;font-size:clamp(1.5rem,3.5vw,2rem);font-weight:800;letter-spacing:-.01em}
.section-sub{text-align:center;color:var(--text-soft);margin-top:6px;margin-bottom:34px}
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.step{
  background:var(--card);border:1px solid var(--border);border-radius:var(--radius);
  padding:26px 22px;text-align:center;transition:.22s
}
.step:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--border-strong)}
.step-num{
  width:46px;height:46px;margin:0 auto 14px;border-radius:14px;display:grid;place-items:center;
  font-weight:800;font-size:1.2rem;color:#fff;background:var(--grad);box-shadow:var(--shadow-sm)
}
.step h3{font-size:1.1rem;margin-bottom:6px}
.step p{color:var(--text-soft);font-size:.94rem}

.features{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.feature{
  background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:24px 20px;transition:.22s
}
.feature:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.feature-ico{font-size:1.7rem;margin-bottom:10px}
.feature h3{font-size:1.04rem;margin-bottom:5px}
.feature p{color:var(--text-soft);font-size:.9rem}

/* FAQ */
.faq{max-width:760px;margin:0 auto;display:flex;flex-direction:column;gap:12px}
.faq-item{
  background:var(--card);border:1px solid var(--border);border-radius:14px;padding:4px 18px;transition:.18s
}
.faq-item[open]{border-color:var(--border-strong);box-shadow:var(--shadow-sm)}
.faq-item summary{
  cursor:pointer;list-style:none;font-weight:600;padding:14px 0;display:flex;justify-content:space-between;align-items:center
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";font-size:1.35rem;color:var(--brand);transition:.2s;font-weight:400}
.faq-item[open] summary::after{transform:rotate(45deg)}
.faq-item p{color:var(--text-soft);padding:0 0 16px;font-size:.94rem}

/* Ad slot (giữ chỗ, không nhảy layout khi bật) */
.ad-slot{margin:26px 0;min-height:0}
.ad-slot[data-active]{min-height:100px;display:grid;place-items:center;
  border:1px dashed var(--border);border-radius:14px;color:var(--muted);font-size:.85rem}

/* ===================== Footer ===================== */
.footer{border-top:1px solid var(--border);background:var(--bg-soft);margin-top:40px;padding-top:42px}
.footer-inner{display:flex;flex-wrap:wrap;gap:40px;justify-content:space-between;padding-bottom:30px}
.footer-brand{max-width:300px}
.footer-brand p{color:var(--text-soft);font-size:.92rem;margin-top:10px}
.footer-cols{display:flex;gap:60px;flex-wrap:wrap}
.footer-cols h4{font-size:.95rem;margin-bottom:12px}
.footer-cols a{display:block;color:var(--text-soft);font-size:.9rem;padding:4px 0;transition:.15s}
.footer-cols a:hover{color:var(--brand)}
.footer-bottom{border-top:1px solid var(--border);padding:20px;color:var(--muted);font-size:.85rem;text-align:center}

/* ===================== Toast ===================== */
.toast{
  position:fixed;left:50%;bottom:28px;transform:translate(-50%,140%);
  background:var(--text);color:var(--bg);padding:12px 20px;border-radius:12px;font-weight:600;font-size:.92rem;
  box-shadow:var(--shadow-lg);z-index:100;opacity:0;transition:.3s;pointer-events:none;max-width:90vw
}
.toast.show{transform:translate(-50%,0);opacity:1}
.toast.err{background:var(--err);color:#fff}

/* ===================== Mode tabs ===================== */
.mode-tabs{
  display:inline-flex;gap:4px;margin:26px auto 0;padding:5px;
  background:var(--bg-soft);border:1px solid var(--border);border-radius:999px;box-shadow:var(--shadow-sm)
}
.mode-tab{
  display:inline-flex;align-items:center;gap:7px;cursor:pointer;font-family:inherit;
  border:none;background:transparent;color:var(--text-soft);font-weight:700;font-size:.92rem;
  padding:9px 18px;border-radius:999px;transition:.2s
}
.mode-tab:hover{color:var(--text)}
.mode-tab.active{color:#fff;background:var(--grad);box-shadow:0 8px 18px -8px rgba(109,94,252,.7)}

/* ===================== Scan limit ===================== */
.scan-limit{
  display:flex;align-items:center;justify-content:center;gap:10px;flex-wrap:wrap;
  margin:16px auto 0;animation:fadeUp .3s ease
}
.scan-limit-label{color:var(--text-soft);font-size:.88rem;font-weight:600}
.scan-chips{display:inline-flex;gap:4px;padding:4px;background:var(--bg-soft);border:1px solid var(--border);border-radius:999px}
.scan-chip{
  cursor:pointer;font-family:inherit;border:none;background:transparent;color:var(--text-soft);
  font-weight:700;font-size:.86rem;padding:7px 14px;border-radius:999px;transition:.18s
}
.scan-chip:hover{color:var(--text)}
.scan-chip.active{color:#fff;background:var(--brand)}
.scan-custom{
  font-family:inherit;font-weight:600;font-size:.88rem;color:var(--text);width:120px;
  background:var(--bg-soft);border:1px solid var(--border);border-radius:999px;padding:9px 14px
}
.scan-custom:focus{outline:none;border-color:var(--brand)}
.scan-custom::placeholder{color:var(--muted);font-weight:500}

/* ===================== Channel / Playlist ===================== */
.channel-wrap{margin-top:14px;animation:fadeUp .4s ease}
.channel-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden}
.channel-head{
  display:flex;align-items:center;justify-content:space-between;gap:18px;flex-wrap:wrap;
  padding:18px 20px;border-bottom:1px solid var(--border);background:var(--grad-soft)
}
.channel-id{display:flex;align-items:center;gap:14px;min-width:0}
.channel-avatar{width:54px;height:54px;border-radius:50%;flex:none;object-fit:cover;background:var(--bg);border:2px solid var(--card)}
.channel-name{font-size:1.1rem;font-weight:800;line-height:1.2}
.channel-count{color:var(--text-soft);font-size:.88rem;font-weight:600}
.channel-tools{display:flex;align-items:center;gap:14px;flex-wrap:wrap}
.ch-selectall{display:inline-flex;align-items:center;gap:7px;font-weight:600;font-size:.9rem;color:var(--text-soft);cursor:pointer;user-select:none}
.ch-selectall input,.ch-check input{width:17px;height:17px;accent-color:var(--brand);cursor:pointer}
.ch-quality-wrap{display:inline-flex;align-items:center;gap:7px;font-size:.9rem;color:var(--text-soft);font-weight:600}
.ch-quality{
  font-family:inherit;font-weight:600;font-size:.9rem;color:var(--text);cursor:pointer;
  background:var(--bg-soft);border:1px solid var(--border);border-radius:10px;padding:8px 12px
}
.ch-quality:focus{outline:none;border-color:var(--brand)}
.ch-download{
  display:inline-flex;align-items:center;gap:8px;border:none;cursor:pointer;font-family:inherit;
  font-weight:700;font-size:.92rem;color:#fff;background:var(--grad);background-size:160% 160%;
  padding:11px 20px;border-radius:11px;box-shadow:0 10px 22px -10px rgba(109,94,252,.75);transition:.2s
}
.ch-download:hover{transform:translateY(-1px);background-position:100% 0}
.ch-download:disabled{opacity:.5;cursor:not-allowed;transform:none;box-shadow:none}
.ch-download b{font-weight:800}

.channel-grid{
  display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:14px;padding:18px 20px;
  max-height:580px;overflow:auto
}
/* thanh tiến trình tải ZIP trong header kênh */
.ch-progress{margin-top:8px;display:flex;align-items:center;gap:10px;max-width:420px}
.chp-bar{flex:1;height:7px;border-radius:999px;background:var(--bg);overflow:hidden}
.chp-fill{height:100%;width:0;border-radius:999px;background:var(--grad);transition:width .3s ease}
.chp-text{font-size:.82rem;font-weight:600;color:var(--text-soft);white-space:nowrap}
.chp-stop,.dlp-stop{flex:none;cursor:pointer;border:1px solid #ef4444;background:transparent;color:#ef4444;
  font-family:inherit;font-weight:700;font-size:.78rem;padding:4px 10px;border-radius:8px;white-space:nowrap;transition:.15s}
.chp-stop:hover,.dlp-stop:hover{background:#ef4444;color:#fff}
.chp-stop:disabled,.dlp-stop:disabled{opacity:.5;cursor:default}

/* chuyển chế độ xem lưới / link */
.ch-view{display:inline-flex;gap:3px;background:var(--bg);border:1px solid var(--border);border-radius:999px;padding:3px}
.ch-view-btn{cursor:pointer;font-family:inherit;font-weight:700;font-size:.82rem;border:none;background:transparent;color:var(--text-soft);padding:6px 12px;border-radius:999px;transition:.15s}
.ch-view-btn.active{color:#fff;background:var(--brand)}
/* danh sách link */
.channel-links{padding:18px 20px}
.cl-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:10px}
.cl-head b{color:var(--brand)}
.btn-copylinks{display:inline-flex;align-items:center;gap:7px;border:none;cursor:pointer;font-family:inherit;font-weight:700;font-size:.88rem;color:#fff;background:var(--grad);padding:9px 16px;border-radius:10px;transition:.18s}
.btn-copylinks:hover{transform:translateY(-1px)}
.cl-textarea{width:100%;min-height:300px;max-height:560px;resize:vertical;font-family:ui-monospace,monospace;font-size:.86rem;
  color:var(--text);background:var(--bg-soft);border:1px solid var(--border-strong);border-radius:12px;padding:12px 14px;outline:none;line-height:1.6}
.cl-textarea:focus{border-color:var(--brand)}
.ch-item{
  position:relative;border:1px solid var(--border);border-radius:14px;overflow:hidden;background:var(--bg-soft);
  cursor:pointer;transition:.18s
}
.ch-item:hover{border-color:var(--brand-2);transform:translateY(-3px);box-shadow:var(--shadow)}
.ch-item.selected{border-color:var(--brand);box-shadow:0 0 0 2px color-mix(in srgb,var(--brand) 45%,transparent)}
.ch-item-thumb{position:relative;aspect-ratio:16/9;background:var(--bg)}
.ch-item-thumb img{width:100%;height:100%;object-fit:cover}
.ch-item-dur{position:absolute;right:6px;bottom:6px;background:rgba(0,0,0,.78);color:#fff;padding:2px 7px;border-radius:6px;font-size:.74rem;font-weight:600}
.ch-check{
  position:absolute;top:8px;left:8px;width:26px;height:26px;border-radius:8px;
  background:rgba(0,0,0,.45);display:grid;place-items:center;backdrop-filter:blur(2px)
}
.ch-item-body{padding:10px 12px}
.ch-item-title{
  font-size:.88rem;font-weight:600;line-height:1.35;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden
}

/* ===================== Premium ===================== */
.pro-badge{
  font-size:.62rem;font-weight:800;letter-spacing:.04em;padding:2px 6px;border-radius:6px;
  background:linear-gradient(120deg,#f7b733,#fc4a1a);color:#fff;margin-left:2px;line-height:1
}
.modal-overlay{
  position:fixed;inset:0;z-index:200;display:grid;place-items:center;padding:20px;
  background:rgba(10,12,20,.55);backdrop-filter:blur(4px);animation:fadeUp .2s ease
}
.modal{
  position:relative;background:var(--card);border:1px solid var(--border);border-radius:20px;
  padding:34px 28px 26px;width:100%;max-width:430px;text-align:center;box-shadow:var(--shadow-lg)
}
.modal-close{
  position:absolute;top:12px;right:14px;border:none;background:transparent;color:var(--muted);
  font-size:1.7rem;line-height:1;cursor:pointer;transition:.15s
}
.modal-close:hover{color:var(--text)}
.modal-crown{font-size:2.6rem;margin-bottom:6px}
.modal-title{font-size:1.4rem;font-weight:800}
.modal-msg{color:var(--text-soft);margin-top:6px;font-size:.95rem}
.modal-feats{display:flex;flex-direction:column;gap:7px;text-align:left;margin:18px auto;max-width:280px;
  color:var(--text-soft);font-weight:600;font-size:.92rem}
.modal-activate{display:flex;gap:8px;margin-top:6px}
.key-input{
  flex:1;min-width:0;font-family:inherit;font-size:.92rem;color:var(--text);background:var(--bg-soft);
  border:1px solid var(--border-strong);border-radius:11px;padding:12px 14px;outline:none;text-transform:uppercase
}
.key-input:focus{border-color:var(--brand)}
.key-input::placeholder{text-transform:none;color:var(--muted)}
.key-btn{
  flex:none;border:none;cursor:pointer;font-family:inherit;font-weight:700;color:#fff;
  background:var(--grad);padding:0 20px;border-radius:11px;transition:.18s
}
.key-btn:hover{transform:translateY(-1px)}
.modal-err{color:var(--err);font-weight:600;font-size:.88rem;margin-top:10px}
.modal-buy{margin-top:16px;color:var(--muted);font-size:.88rem}
.modal-buy a{color:var(--brand);font-weight:700}

/* ----- Mua Premium (QR thanh toán) ----- */
.price-tag{margin:14px 0 16px;font-size:2rem;font-weight:800;color:var(--text)}
.price-tag small{font-size:.95rem;font-weight:600;color:var(--muted)}
.pay-qr{width:220px;height:220px;object-fit:contain;border-radius:14px;background:#fff;padding:8px;margin:6px auto 14px;display:block;border:1px solid var(--border)}
.pay-info{display:flex;flex-direction:column;gap:8px;text-align:left;background:var(--bg-soft);border:1px solid var(--border);border-radius:12px;padding:12px 14px}
.pay-row{display:flex;justify-content:space-between;gap:10px;font-size:.9rem}
.pay-row span{color:var(--muted)}
.pay-row b{color:var(--text);font-weight:700;text-align:right;word-break:break-all}
.pay-code{color:#fc4a1a !important;letter-spacing:.5px}
.pay-note{margin-top:12px;color:var(--muted);font-size:.82rem;line-height:1.5}
.pay-wait{margin-top:14px;display:flex;align-items:center;justify-content:center;gap:9px;color:var(--brand);font-weight:700}
.pay-wait .dl-spinner{position:relative;inset:auto;margin:0;width:18px;height:18px;opacity:1;
  border:2.5px solid rgba(124,108,255,.35);border-top-color:var(--brand);animation:spin .7s linear infinite}
.btn-auth.upgrade{background:linear-gradient(120deg,#f7b733,#fc4a1a)}
.premium-pill{
  position:fixed;right:18px;bottom:18px;z-index:90;background:linear-gradient(120deg,#f7b733,#fc4a1a);
  color:#fff;font-weight:700;font-size:.86rem;padding:9px 15px;border-radius:999px;box-shadow:var(--shadow)
}

/* ===================== Auth (đăng nhập) ===================== */
.btn-auth{
  font-family:inherit;font-weight:700;font-size:.9rem;cursor:pointer;border:none;
  color:#fff;background:var(--grad);padding:9px 18px;border-radius:11px;transition:.18s
}
.btn-auth:hover{transform:translateY(-1px)}
.btn-auth.ghost{background:transparent;border:1px solid var(--border);color:var(--text-soft)}
.btn-auth.ghost:hover{color:var(--brand);border-color:var(--brand)}
.user-box{display:flex;align-items:center;gap:8px}
.user-chip{display:flex;align-items:center;gap:8px;padding:5px 12px 5px 5px;border:1px solid var(--border);border-radius:999px;background:var(--bg-soft);font-weight:600;font-size:.9rem}
.user-avatar{width:28px;height:28px;border-radius:50%;display:grid;place-items:center;background:var(--grad);color:#fff;font-weight:800;font-size:.85rem;text-transform:uppercase}
.user-prem{font-size:.95rem}

.auth-tabs{display:flex;gap:4px;background:var(--bg-soft);border:1px solid var(--border);border-radius:999px;padding:4px;margin:18px 0 16px}
.auth-tab{flex:1;cursor:pointer;font-family:inherit;font-weight:700;font-size:.92rem;border:none;background:transparent;color:var(--text-soft);padding:9px;border-radius:999px;transition:.18s}
.auth-tab.active{color:#fff;background:var(--grad)}
.auth-form{display:flex;flex-direction:column;gap:10px}
.auth-input{
  font-family:inherit;font-size:.96rem;color:var(--text);background:var(--bg-soft);
  border:1px solid var(--border-strong);border-radius:12px;padding:13px 15px;outline:none
}
.auth-input:focus{border-color:var(--brand)}
.auth-submit{
  border:none;cursor:pointer;font-family:inherit;font-weight:700;font-size:1rem;color:#fff;
  background:var(--grad);background-size:160% 160%;padding:13px;border-radius:12px;margin-top:4px;
  box-shadow:0 10px 22px -10px rgba(109,94,252,.75);transition:.2s
}
.auth-submit:hover{transform:translateY(-1px);background-position:100% 0}

@media (max-width:720px){
  .user-name{display:none}
}

/* ===================== Thanh tiến trình tải ===================== */
.dl-progress{
  position:fixed;right:18px;bottom:18px;z-index:95;width:320px;max-width:90vw;
  background:var(--card);border:1px solid var(--border-strong);border-radius:14px;
  padding:14px 16px;box-shadow:var(--shadow-lg);animation:fadeUp .25s ease
}
.dlp-top{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-bottom:8px}
.dlp-name{font-weight:600;font-size:.9rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.dlp-pct{font-weight:800;font-size:.92rem;color:var(--brand);flex:none}
.dlp-bar{height:8px;border-radius:999px;background:var(--bg);overflow:hidden}
.dlp-fill{height:100%;width:0;border-radius:999px;background:var(--grad);transition:width .2s ease}
.dlp-fill.indet{width:40%;animation:indet 1.1s ease-in-out infinite}
@keyframes indet{0%{margin-left:-40%}100%{margin-left:100%}}
.dlp-status{margin-top:7px;color:var(--text-soft);font-size:.8rem}

/* ===================== Animations ===================== */
@keyframes fadeUp{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:translateY(0)}}

/* ===================== Responsive ===================== */
@media (max-width:860px){
  .features{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:720px){
  .nav-links{
    display:none;position:absolute;top:64px;left:0;right:0;flex-direction:column;gap:2px;
    background:var(--bg-soft);border-bottom:1px solid var(--border);padding:10px 16px
  }
  .nav-links.open{display:flex}
  .nav-burger{display:grid}
  .dl-box{flex-wrap:wrap;border-radius:20px;padding:10px}
  .dl-platform{display:none}
  .dl-input{flex:1 1 100%;order:1;padding:8px 6px}
  .dl-paste{order:2}
  .dl-submit{order:3;flex:1;justify-content:center;display:flex;align-items:center}
  .result-card,.skeleton{flex-direction:column}
  .result-thumb,.skeleton .sk-thumb{width:100%}
  .steps{grid-template-columns:1fr}
}
@media (max-width:480px){
  .features{grid-template-columns:1fr}
  .hero{padding:40px 0 20px}
}

/* Giảm chuyển động nếu user thiết lập */
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}