/* Baidu Downloader — design system tự chứa (không cần build step). */
:root {
  /* Nền ngà dịu mắt (feedback: trắng tinh gây chói), surface vẫn trắng để nổi khối */
  --bg: #edf0f6;
  --surface: #ffffff;
  --surface-2: #e7ebf3;
  --border: #dde2ec;
  --text: #1a1f2e;
  --muted: #667085;
  --primary: #2563eb;
  --primary-600: #1d4ed8;
  --primary-soft: #eff4ff;
  --success: #10b981;
  --danger: #ef4444;
  --warning: #f59e0b;
  --radius: 14px;
  --shadow: 0 1px 3px rgba(16, 24, 40, .06), 0 8px 24px rgba(16, 24, 40, .06);
  --maxw: 1080px;
}
/* Chủ đích một diện mạo SÁNG duy nhất (feedback 25/08: bản tự đổi theo
   dark-mode trình duyệt nhìn tối quá) — không override theo prefers-color-scheme. */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: 'Segoe UI', system-ui, -apple-system, 'Noto Sans', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
.container { max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 20;
  backdrop-filter: saturate(1.4) blur(8px);
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  border-bottom: 1px solid var(--border);
}
.site-header .container { display: flex; align-items: center; justify-content: space-between; height: 62px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 18px; color: var(--text); }
.brand .logo {
  width: 30px; height: 30px; border-radius: 8px;
  background: linear-gradient(135deg, var(--primary), #7c3aed);
  display: grid; place-items: center; color: #fff; font-weight: 800;
}
.nav { display: flex; gap: 22px; align-items: center; }
.nav a { color: var(--muted); font-weight: 500; font-size: 15px; }
.nav a:hover { color: var(--text); text-decoration: none; }

/* Hero */
.hero { padding: 72px 0 40px; text-align: center; position: relative; overflow: hidden; }
.hero::before {
  content: ""; position: absolute; inset: -40% 0 auto 0; height: 480px;
  background: radial-gradient(60% 60% at 50% 0%, color-mix(in srgb, var(--primary) 18%, transparent), transparent 70%);
  pointer-events: none;
}
.hero .eyebrow {
  display: inline-block; padding: 6px 14px; border-radius: 999px;
  background: var(--primary-soft); color: var(--primary); font-weight: 600; font-size: 13px;
  border: 1px solid color-mix(in srgb, var(--primary) 20%, transparent); margin-bottom: 18px;
}
.hero h1 { font-size: clamp(30px, 5vw, 48px); line-height: 1.12; margin: 0 0 16px; letter-spacing: -0.02em; }
.hero h1 .grad { background: linear-gradient(120deg, var(--primary), #7c3aed); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero p.lead { font-size: 18px; color: var(--muted); max-width: 620px; margin: 0 auto 28px; }

/* Card + form */
.card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); box-shadow: var(--shadow);
}
.download-box { max-width: 680px; margin: 0 auto; padding: 22px; text-align: left; }
.field { margin-bottom: 14px; }
.field label { display: block; font-weight: 600; font-size: 14px; margin-bottom: 6px; }
.input {
  width: 100%; padding: 13px 15px; font-size: 15px; color: var(--text);
  background: var(--surface-2); border: 1px solid var(--border); border-radius: 10px;
  transition: border-color .15s, box-shadow .15s;
}
.input:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-soft); }
.row-2 { display: grid; grid-template-columns: 1fr; gap: 14px; }
@media (min-width: 620px) { .row-2 { grid-template-columns: 2fr 1fr; } }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 13px 22px; font-size: 15px; font-weight: 600; border-radius: 10px;
  border: 1px solid transparent; cursor: pointer;
  transition: transform .15s, background .15s, box-shadow .15s, border-color .15s, color .15s;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--primary); color: #fff; width: 100%; }
.btn-primary:hover {
  background: var(--primary-600); text-decoration: none;
  transform: translateY(-1px);
  box-shadow: 0 8px 20px color-mix(in srgb, var(--primary) 38%, transparent);
}
.btn-primary:disabled { opacity: .6; cursor: not-allowed; transform: none; box-shadow: none; }
.btn-ghost { background: var(--surface-2); color: var(--text); border-color: var(--border); }
.btn-ghost:hover {
  border-color: var(--primary); color: var(--primary); background: var(--primary-soft);
  text-decoration: none; transform: translateY(-1px);
}
.hint { font-size: 13px; color: var(--muted); margin-top: 10px; }

/* Progress / result */
.result { max-width: 680px; margin: 18px auto 0; padding: 20px; display: none; }
.result.show { display: block; }
.status-line { display: flex; align-items: center; gap: 12px; margin-bottom: 14px; }
.spinner {
  width: 20px; height: 20px; border-radius: 50%; flex: none;
  border: 2.5px solid var(--border); border-top-color: var(--primary);
  animation: spin .8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.status-text { font-weight: 600; }
.progress { height: 10px; background: var(--surface-2); border-radius: 999px; overflow: hidden; }
.progress .bar { height: 100%; width: 0; background: linear-gradient(90deg, var(--primary), #7c3aed); transition: width .9s ease-out; }
/* Chưa có byte nào: thanh chạy qua lại để thấy hệ thống còn sống (thay vì 0% đứng im) */
.progress .bar.indeterminate { width: 35% !important; animation: slide 1.4s ease-in-out infinite; }
@keyframes slide { 0% { margin-left: -35%; } 100% { margin-left: 100%; } }
.progress-meta { display: flex; justify-content: space-between; font-size: 13px; color: var(--muted); margin-top: 8px; }
.alert { padding: 12px 14px; border-radius: 10px; font-size: 14px; margin-top: 8px; }
.alert-error { background: color-mix(in srgb, var(--danger) 12%, transparent); color: var(--danger); }
.badge { display: inline-block; padding: 3px 10px; border-radius: 999px; font-size: 12px; font-weight: 600; }
.badge-active { background: color-mix(in srgb, var(--success) 15%, transparent); color: var(--success); }
.badge-cooldown { background: color-mix(in srgb, var(--warning) 15%, transparent); color: var(--warning); }
.badge-dead, .badge-failed { background: color-mix(in srgb, var(--danger) 15%, transparent); color: var(--danger); }

/* Sections */
section.block { padding: 56px 0; }
section.block h2 { font-size: 28px; text-align: center; margin: 0 0 8px; letter-spacing: -0.01em; }
section.block .sub { text-align: center; color: var(--muted); margin: 0 auto 36px; max-width: 560px; }
.grid-3 { display: grid; grid-template-columns: 1fr; gap: 18px; }
@media (min-width: 760px) { .grid-3 { grid-template-columns: repeat(3, 1fr); } }
.step { padding: 24px; }
.step .num {
  width: 38px; height: 38px; border-radius: 10px; display: grid; place-items: center;
  background: var(--primary-soft); color: var(--primary); font-weight: 800; margin-bottom: 14px;
}
.step h3 { margin: 0 0 6px; font-size: 17px; }
.step p { margin: 0; color: var(--muted); font-size: 15px; }

/* FAQ */
.faq { max-width: 760px; margin: 0 auto; }
.faq details {
  background: var(--surface); border: 1px solid var(--border); border-radius: 12px;
  padding: 4px 18px; margin-bottom: 12px;
}
.faq summary { cursor: pointer; font-weight: 600; padding: 14px 0; list-style: none; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; float: right; color: var(--muted); font-weight: 400; }
.faq details[open] summary::after { content: "–"; }
.faq details p { margin: 0 0 16px; color: var(--muted); }

/* Footer */
.site-footer { border-top: 1px solid var(--border); padding: 32px 0; color: var(--muted); font-size: 14px; }
.site-footer .container { display: flex; flex-wrap: wrap; gap: 12px; justify-content: space-between; }

/* Admin */
.table { width: 100%; border-collapse: collapse; font-size: 14px; }
.table th, .table td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--border); }
.table th { color: var(--muted); font-weight: 600; }
.stat-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-bottom: 24px; }
.stat { padding: 18px; }
.stat .n { font-size: 28px; font-weight: 800; }
.stat .l { color: var(--muted); font-size: 13px; }

/* --- Hero 2 cột: form + khung giá --- */
.hero-grid { display: grid; grid-template-columns: 1.4fr 1fr; gap: 20px; align-items: start; margin-top: 28px; }
@media (max-width: 860px) { .hero-grid { grid-template-columns: 1fr; } }

.price-panel {
  padding: 22px; position: relative; overflow: hidden;
  border-color: color-mix(in srgb, var(--primary) 28%, var(--border));
  background: linear-gradient(180deg, color-mix(in srgb, var(--primary) 6%, var(--surface)), var(--surface) 45%);
  transition: transform .18s, box-shadow .18s, border-color .18s;
}
.price-panel::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 4px;
  background: linear-gradient(90deg, var(--primary), #7c3aed);
}
.price-panel:hover {
  transform: translateY(-3px);
  border-color: var(--primary);
  box-shadow: 0 14px 36px color-mix(in srgb, var(--primary) 20%, transparent);
}
.price-panel h3 { margin: 0 0 4px; font-size: 17px; }
.price-panel .tier { padding: 14px 0; }
.price-panel .tier + .tier { border-top: 1px solid var(--border); }
.price-panel .big { font-size: 26px; font-weight: 800; letter-spacing: -.5px; }
.price-panel .big small { font-size: 14px; font-weight: 600; color: var(--muted); }
.price-panel ul { margin: 8px 0 0; padding-left: 18px; color: var(--muted); font-size: 14px; }
.price-panel .free-badge { display:inline-block; background: color-mix(in srgb, var(--success) 14%, transparent); color: var(--success); font-weight: 700; font-size: 12px; border-radius: 999px; padding: 2px 10px; letter-spacing: .4px; }

/* --- Modal hướng dẫn lấy mã free --- */
.modal-backdrop { position: fixed; inset: 0; background: rgba(15,20,35,.55); display: none; place-items: center; z-index: 60; padding: 20px; }
.modal-backdrop.open { display: grid; }
.modal { background: var(--surface); border-radius: var(--radius); box-shadow: var(--shadow); max-width: 460px; width: 100%; padding: 26px; position: relative; }
.modal h3 { margin-top: 0; }
.modal .close { position: absolute; top: 12px; right: 16px; background: none; border: 0; font-size: 22px; color: var(--muted); cursor: pointer; }
.modal ol { padding-left: 20px; color: var(--muted); }
.modal ol li { margin: 8px 0; }

/* --- Dải số liệu thật --- */
.stat-strip { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 28px; }
@media (max-width: 640px) { .stat-strip { grid-template-columns: 1fr; } }
.stat-strip .card, .step { transition: transform .18s, box-shadow .18s; }
.stat-strip .card:hover, .step:hover { transform: translateY(-2px); box-shadow: 0 10px 28px rgba(16, 24, 40, .1); }
.stat-strip .card { text-align: center; padding: 18px; }
.stat-strip .n { font-size: 28px; font-weight: 800; letter-spacing: -.5px; }
.stat-strip .l { color: var(--muted); font-size: 14px; }

/* --- Bảng so sánh đối thủ --- */
.compare { overflow-x: auto; }
.compare table { width: 100%; border-collapse: collapse; background: var(--surface); border-radius: var(--radius); box-shadow: var(--shadow); overflow: hidden; }
.compare th, .compare td { padding: 13px 16px; text-align: left; border-bottom: 1px solid var(--border); font-size: 15px; }
.compare thead th { background: var(--surface-2); font-size: 13px; text-transform: uppercase; letter-spacing: .4px; color: var(--muted); }
.compare td.us { background: var(--primary-soft); font-weight: 700; }
.compare .yes { color: var(--success); font-weight: 700; }
.compare .no { color: var(--danger); }

/* Thẻ báo giá (pha 1 xong, chờ khách xác nhận) */
.quote {
  margin-top: 6px; padding: 14px 16px; border-radius: 12px;
  background: var(--primary-soft); border: 1px dashed color-mix(in srgb, var(--primary) 35%, var(--border));
}
.quote-main { display: flex; align-items: baseline; gap: 12px; flex-wrap: wrap; font-weight: 600; }
.quote-price { font-size: 26px; font-weight: 800; color: var(--primary); letter-spacing: -.02em; }
.quote-price.free { color: var(--success); }
.quote-actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 12px; align-items: center; }
.note-soft { font-size: 13px; color: var(--muted); margin-top: 10px; }
.note-info {
  margin-top: 12px; padding: 12px 14px; border-radius: 10px; font-size: 14px;
  background: color-mix(in srgb, var(--success) 10%, transparent); color: #0b6e4f;
}

/* --- Đánh giá thật (form sau khi tải + khu "What users say") --- */
.review-form { margin-top: 14px; padding: 14px; border: 1px dashed var(--border); border-radius: 10px; display: none; }
.stars { display: flex; gap: 4px; margin-top: 6px; }
.stars button { background: none; border: 0; font-size: 26px; line-height: 1; color: #cbd2e0; cursor: pointer; padding: 0 2px; transition: color .1s, transform .1s; }
.stars button:hover, .stars button.on { color: #f59e0b; }
.stars button:hover { transform: scale(1.15); }
.review-card { padding: 20px; }
.stars-static { color: #f59e0b; font-size: 18px; letter-spacing: 1px; }
.stars-static span { color: #d9dee8; }
.review-card p { margin: 8px 0 12px; color: var(--text); font-size: 15px; }
.review-card .who { display: flex; align-items: center; gap: 8px; color: var(--muted); font-size: 13px; }
.review-card .who .verified { color: var(--success); font-size: 12px; font-weight: 600; }
.review-card .avatar { width: 30px; height: 30px; border-radius: 50%; display: grid; place-items: center; background: linear-gradient(135deg, var(--primary), #7c3aed); color: #fff; font-weight: 700; font-size: 12px; }

/* --- Bài viết SEO --- */
.article { padding: 48px 0 64px; }
.article .container { max-width: 760px; }
.article .crumb { color: var(--muted); font-size: 13px; margin: 0 0 10px; }
.article h1 { font-size: clamp(28px, 4vw, 40px); line-height: 1.15; letter-spacing: -0.02em; margin: 0 0 8px; }
.article .meta { color: var(--muted); font-size: 13px; margin: 0 0 24px; }
.article .lead { font-size: 18px; color: var(--muted); }
.article h2 { font-size: 24px; margin: 36px 0 10px; letter-spacing: -0.01em; }
.article h3 { font-size: 18px; margin: 24px 0 6px; }
.article p, .article li { font-size: 16px; line-height: 1.7; }
.article ul, .article ol { padding-left: 22px; }
.article li { margin: 6px 0; }
.article code { background: var(--surface-2); padding: 1px 6px; border-radius: 6px; font-size: 14px; }
.article .compare { margin: 16px 0; }
.article .cta { padding: 26px; margin-top: 40px; text-align: center; border-color: color-mix(in srgb, var(--primary) 30%, var(--border)); }
.article .cta h3 { margin: 0 0 6px; font-size: 20px; }
.article .cta p { color: var(--muted); margin: 0 0 14px; }

/* ===================== ADMIN (layout sidebar, bảng rõ, màu trạng thái) ===================== */
.admin-body { display: flex; min-height: 100vh; background: #f3f5f9; }
.admin-side { width: 230px; flex: none; background: #141a2b; color: #cbd3e3; padding: 18px 14px; display: flex; flex-direction: column; gap: 18px; position: sticky; top: 0; height: 100vh; }
.admin-side .brand small { font-weight: 500; font-size: 12px; color: #8b96ad; margin-left: 4px; }
.admin-side nav { display: flex; flex-direction: column; gap: 4px; }
.admin-side nav a { color: #cbd3e3; padding: 10px 12px; border-radius: 8px; font-size: 14px; font-weight: 500; }
.admin-side nav a:hover { background: #1f2740; text-decoration: none; color: #fff; }
.admin-side nav a.on { background: var(--primary); color: #fff; }
.admin-side .side-foot { margin-top: auto; display: flex; flex-direction: column; gap: 6px; font-size: 13px; }
.admin-side .side-foot a { color: #8b96ad; }
.admin-main { flex: 1; padding: 24px 28px 48px; min-width: 0; }
.admin-top { display: flex; align-items: baseline; gap: 14px; margin-bottom: 18px; }
.admin-top h1 { margin: 0; font-size: 24px; }
.admin-sub { color: var(--muted); font-size: 14px; }
.alert-ok { background: color-mix(in srgb, var(--success) 14%, #fff); color: #047857; border: 1px solid color-mix(in srgb, var(--success) 40%, transparent); margin-bottom: 14px; }
.admin-main .alert-error { margin-bottom: 14px; }

.kpi-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); gap: 12px; margin-bottom: 20px; }
.kpi { background: #fff; border: 1px solid var(--border); border-radius: 12px; padding: 14px 16px; border-left: 4px solid var(--primary); }
.kpi .n { font-size: 26px; font-weight: 800; letter-spacing: -.5px; line-height: 1.1; }
.kpi .l { color: var(--muted); font-size: 12px; margin-top: 4px; text-transform: uppercase; letter-spacing: .4px; }
.kpi.ok { border-left-color: var(--success); } .kpi.warn { border-left-color: var(--warning); } .kpi.bad { border-left-color: var(--danger); } .kpi.info { border-left-color: #7c3aed; }

.panel { background: #fff; border: 1px solid var(--border); border-radius: 12px; padding: 16px; margin-bottom: 18px; overflow-x: auto; }
.panel h2 { font-size: 16px; margin: 0 0 12px; display: flex; align-items: center; gap: 8px; }
.panel h2 .count { background: var(--surface-2); border-radius: 999px; padding: 1px 9px; font-size: 12px; color: var(--muted); }
.admin-main .table th { background: #f7f8fb; font-size: 12px; text-transform: uppercase; letter-spacing: .4px; color: #5b6478; }
.admin-main .table td { vertical-align: middle; }
.admin-main .table tr:hover td { background: #fafbfe; }
.mono { font-family: ui-monospace, Menlo, Consolas, monospace; font-size: 12px; }
.trunc { max-width: 260px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; display: inline-block; vertical-align: bottom; }
.muted { color: var(--muted); font-size: 13px; }
.btn-sm { padding: 5px 11px; font-size: 12px; width: auto; }
.btn-danger { background: color-mix(in srgb, var(--danger) 12%, #fff); color: var(--danger); border-color: color-mix(in srgb, var(--danger) 30%, transparent); }
.btn-danger:hover { background: var(--danger); color: #fff; border-color: var(--danger); }
.btn-ok { background: color-mix(in srgb, var(--success) 12%, #fff); color: #047857; border-color: color-mix(in srgb, var(--success) 35%, transparent); }
.pop-host { position: relative; }
.popover { position: absolute; right: 0; left: auto; z-index: 10; text-align: left; background: #fff; border: 1px solid var(--border); border-radius: 10px; padding: 14px; margin-top: 6px; width: 360px; box-shadow: var(--shadow); }
.filters { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; margin-bottom: 12px; }
.filters a { padding: 5px 11px; border-radius: 999px; font-size: 13px; background: var(--surface-2); color: var(--text); }
.filters a.on { background: var(--primary); color: #fff; }
.filters form { display: flex; gap: 6px; margin-left: auto; }
.filters .input { padding: 7px 11px; font-size: 13px; width: 260px; }

/* trạng thái job: mỗi trạng thái một màu, đọc phát biết */
.st { display: inline-block; padding: 3px 10px; border-radius: 999px; font-size: 12px; font-weight: 600; white-space: nowrap; }
.st-pending, .st-expired { background: #eceff5; color: #5b6478; }
.st-resolving, .st-transferring, .st-downloading { background: #e0ecff; color: #1d4ed8; }
.st-quoted { background: #fff3d6; color: #b45309; }
.st-approved { background: #ede9fe; color: #6d28d9; }
.st-ready { background: #d9f7e8; color: #047857; }
.st-failed { background: #fee2e2; color: #b91c1c; }
.pagination { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 12px; }
.pagination a, .pagination span { padding: 5px 10px; border-radius: 8px; background: var(--surface-2); font-size: 13px; }
.pagination .active span { background: var(--primary); color: #fff; }
@media (max-width: 860px) { .admin-body { flex-direction: column; } .admin-side { width: auto; height: auto; position: static; } }