:root {
  color-scheme: dark;
  --bg: #0d0f14;
  --bg-elev: #13161d;
  --card: #161a23;
  --card-border: #232936;
  --card-border-hover: #394156;
  --header-bg: rgba(13, 15, 20, 0.8);
  --text: #e7eaf1;
  --text-muted: #9aa3b2;
  --text-faint: #6b7486;
  --accent: #7c5cff;
  --accent-2: #22d3ee;
  --accent-soft: rgba(124, 92, 255, 0.16);
  --danger: #f87171;
  --danger-soft: rgba(248, 113, 113, 0.14);
  --ok: #34d399;
  --warn: #fbbf24;
  --radius: 14px;
  --radius-sm: 10px;
  --shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
}

html[data-theme="light"] {
  color-scheme: light;
  --bg: #f4f5f8;
  --bg-elev: #ffffff;
  --card: #ffffff;
  --card-border: #e3e7ef;
  --card-border-hover: #c9d0dd;
  --header-bg: rgba(244, 245, 248, 0.82);
  --text: #1b1e26;
  --text-muted: #5d6675;
  --text-faint: #8b93a5;
  --accent-soft: rgba(124, 92, 255, 0.12);
  --danger-soft: rgba(248, 113, 113, 0.12);
  --shadow: 0 12px 40px rgba(23, 28, 43, 0.12);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  display: flex;
  flex-direction: column;
}

.bg-glow {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(600px 300px at 15% -5%, rgba(124, 92, 255, 0.18), transparent 60%),
    radial-gradient(700px 320px at 100% 0%, rgba(34, 211, 238, 0.12), transparent 60%);
  z-index: 0;
}

.container {
  width: 100%;
  max-width: 880px;
  margin: 0 auto;
  padding: 0 16px;
  position: relative;
  z-index: 1;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--header-bg);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--card-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-top: 14px;
  padding-bottom: 14px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-logo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 12px;
  color: #fff;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 6px 18px rgba(124, 92, 255, 0.4);
  flex: none;
}

.brand-text h1 {
  margin: 0;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.5px;
}

.brand-text p {
  margin: 2px 0 0;
  font-size: 12px;
  color: var(--text-muted);
}

.health {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 14px;
  border-radius: 999px;
  background: var(--bg-elev);
  border: 1px solid var(--card-border);
  font-size: 13px;
  color: var(--text-muted);
  white-space: nowrap;
}

.health-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--text-faint);
  flex: none;
}

.health-dot.ok { background: var(--ok); box-shadow: 0 0 8px rgba(52, 211, 153, 0.8); }
.health-dot.err { background: var(--danger); box-shadow: 0 0 8px rgba(248, 113, 113, 0.8); }

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.theme-toggle {
  appearance: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 999px;
  background: var(--bg-elev);
  border: 1px solid var(--card-border);
  color: var(--text-muted);
  cursor: pointer;
  transition: color 0.16s ease, border-color 0.16s ease;
  flex: none;
}

.theme-toggle:hover {
  color: var(--text);
  border-color: var(--card-border-hover);
}

.theme-toggle .icon-sun { display: none; }
.theme-toggle .icon-moon { display: block; }
html[data-theme="light"] .theme-toggle .icon-sun { display: block; }
html[data-theme="light"] .theme-toggle .icon-moon { display: none; }

.admin-btn {
  appearance: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 14px;
  border-radius: 999px;
  background: var(--bg-elev);
  border: 1px solid var(--card-border);
  color: var(--text-muted);
  font-family: inherit;
  font-size: 13px;
  cursor: pointer;
  transition: color 0.16s ease, border-color 0.16s ease;
  white-space: nowrap;
}

.admin-btn:hover {
  color: var(--text);
  border-color: var(--card-border-hover);
}

.admin-badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 9px;
  border-radius: 999px;
  font-size: 12px;
  color: #fff;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
}

/* Modal */
.modal {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
}

.modal[hidden] { display: none; }

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
}

.modal-card {
  position: relative;
  width: min(92vw, 380px);
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 24px;
}

.modal-card h2 {
  margin: 0 0 16px;
  font-size: 17px;
  font-weight: 700;
}

.login-form {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.login-form .btn {
  margin-top: 4px;
}

/* Cards */
main.container {
  padding-top: 22px;
  padding-bottom: 22px;
  flex: 1;
}

.card {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px;
  margin-bottom: 18px;
}

.card-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}

.card-head h2 {
  margin: 0;
  font-size: 16px;
  font-weight: 650;
}

.results-meta {
  font-size: 12px;
  color: var(--text-muted);
}

/* Source tabs */
.source-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}

.source-tab {
  appearance: none;
  border: 1px solid var(--card-border);
  background: var(--bg-elev);
  color: var(--text-muted);
  font-family: inherit;
  font-size: 14px;
  padding: 8px 18px;
  border-radius: 999px;
  cursor: pointer;
  transition: all 0.16s ease;
}

.source-tab:hover {
  color: var(--text);
  border-color: var(--card-border-hover);
}

.source-tab.active {
  color: #fff;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border-color: transparent;
  box-shadow: 0 4px 14px rgba(124, 92, 255, 0.35);
}

/* Search row */
.search-row {
  display: flex;
  gap: 10px;
}

.search-input-wrap {
  flex: 1;
  position: relative;
  display: flex;
  align-items: center;
}

.search-icon {
  position: absolute;
  left: 14px;
  color: var(--text-faint);
  display: inline-flex;
  pointer-events: none;
}

.search-input-wrap input {
  width: 100%;
  padding: 13px 16px 13px 42px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--card-border);
  background: var(--bg-elev);
  color: var(--text);
  font-family: inherit;
  font-size: 15px;
  outline: none;
  transition: border-color 0.16s ease, box-shadow 0.16s ease;
}

.search-input-wrap input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.search-input-wrap input::placeholder {
  color: var(--text-faint);
}

.search-input-wrap input:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Buttons */
.btn {
  appearance: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: none;
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 15px;
  font-weight: 600;
  padding: 12px 22px;
  cursor: pointer;
  transition: transform 0.1s ease, opacity 0.16s ease, box-shadow 0.16s ease;
  white-space: nowrap;
}

.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: 0.55; cursor: not-allowed; }

.btn-primary {
  color: #fff;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 6px 16px rgba(124, 92, 255, 0.35);
}

.btn-primary:not(:disabled):hover {
  box-shadow: 0 8px 22px rgba(124, 92, 255, 0.5);
}

.btn-icon { flex: none; }

.hint {
  margin: 12px 0 0;
  font-size: 13px;
  color: var(--text-muted);
}

.hint.warn { color: var(--warn); }

.link-btn {
  appearance: none;
  background: none;
  border: none;
  color: var(--accent-2);
  font-family: inherit;
  font-size: 13px;
  cursor: pointer;
  padding: 0;
  margin-top: 10px;
  text-decoration: underline;
}

.link-btn:hover { color: var(--text); }

/* Manual form */
.manual-form {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: flex-end;
  margin-top: 14px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
  flex: 1;
  min-width: 180px;
}

.field label {
  font-size: 12px;
  color: var(--text-muted);
}

.field input,
.field select {
  padding: 11px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--card-border);
  background: var(--bg-elev);
  color: var(--text);
  font-family: inherit;
  font-size: 14px;
  outline: none;
  transition: border-color 0.16s ease, box-shadow 0.16s ease;
}

.field input:focus,
.field select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.field select option {
  background: var(--bg-elev);
  color: var(--text);
}

/* Settings */
.settings-form {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.radio-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.radio-option {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 16px;
  border: 1px solid var(--card-border);
  border-radius: 999px;
  background: var(--bg-elev);
  color: var(--text-muted);
  font-size: 14px;
  cursor: pointer;
  transition: all 0.16s ease;
}

.radio-option:hover {
  color: var(--text);
  border-color: var(--card-border-hover);
}

.radio-option:has(input:checked) {
  color: #fff;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border-color: transparent;
  box-shadow: 0 4px 14px rgba(124, 92, 255, 0.35);
}

.radio-option input {
  accent-color: var(--accent);
}

.settings-actions {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}

.settings-actions .hint {
  margin: 0;
}

/* Results */
.results-body {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.result-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px;
  border: 1px solid var(--card-border);
  border-radius: var(--radius-sm);
  background: var(--bg-elev);
  transition: border-color 0.16s ease;
}

.result-item:hover { border-color: var(--card-border-hover); }

.result-index {
  width: 28px;
  flex: none;
  text-align: center;
  font-size: 14px;
  color: var(--text-faint);
  font-variant-numeric: tabular-nums;
}

.result-main {
  flex: 1;
  min-width: 0;
}

.result-title {
  font-size: 15px;
  font-weight: 600;
  margin: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.result-sub {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 3px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.result-sub .sep { color: var(--text-faint); margin: 0 6px; }

.result-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-top: 8px;
}

.duration {
  font-size: 12px;
  color: var(--text-faint);
  font-variant-numeric: tabular-nums;
}

.quality-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.quality-chip {
  appearance: none;
  border: 1px solid var(--card-border);
  background: transparent;
  color: var(--text-muted);
  font-family: inherit;
  font-size: 12px;
  padding: 4px 11px;
  border-radius: 999px;
  cursor: pointer;
  transition: all 0.14s ease;
}

.quality-chip:hover { color: var(--text); border-color: var(--card-border-hover); }

.quality-chip.active {
  color: #fff;
  background: var(--accent-soft);
  border-color: var(--accent);
}

.no-quality {
  font-size: 12px;
  color: var(--danger);
}

.btn-download {
  flex: none;
  font-size: 13px;
  padding: 9px 16px;
}

/* Download progress */
.dl-progress {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 180px;
}

.dl-progress-bar {
  width: 100%;
  height: 8px;
  border-radius: 999px;
  background: var(--bg);
  border: 1px solid var(--card-border);
  overflow: hidden;
}

.dl-progress-fill {
  height: 100%;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  transition: width 0.3s ease;
}

.dl-progress-fill.done {
  background: linear-gradient(90deg, #2ecc71, #27ae60);
}

.dl-progress-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 12px;
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.dl-pct { color: var(--text); font-weight: 600; }
.dl-speed { color: var(--accent-2); }

/* States */
.state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 42px 16px;
  text-align: center;
  color: var(--text-muted);
}

.state-icon {
  color: var(--text-faint);
}

.state p { margin: 0; font-size: 14px; }

.state.state-error p { color: var(--danger); }

/* Spinner */
.spinner {
  width: 28px;
  height: 28px;
  border: 3px solid var(--card-border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

.spinner-sm {
  width: 14px;
  height: 14px;
  border-width: 2px;
  display: inline-block;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* Toast */
.toast-container {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  gap: 10px;
  z-index: 100;
  width: min(92vw, 420px);
  pointer-events: none;
}

.toast {
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  background: var(--bg-elev);
  border: 1px solid var(--card-border);
  box-shadow: var(--shadow);
  font-size: 14px;
  display: flex;
  align-items: center;
  gap: 10px;
  animation: toast-in 0.2s ease;
}

.toast.ok { border-left: 3px solid var(--ok); }
.toast.err { border-left: 3px solid var(--danger); }
.toast.info { border-left: 3px solid var(--accent); }

@keyframes toast-in {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--card-border);
  padding: 16px 0;
  font-size: 12px;
  color: var(--text-faint);
  text-align: center;
}

/* Responsive */
@media (max-width: 560px) {
  .search-row { flex-direction: column; }
  .search-btn { width: 100%; }
  .manual-form { flex-direction: column; align-items: stretch; }
  .field { min-width: 0; }
  .result-item { flex-wrap: wrap; }
  .result-index { width: auto; }
  .btn-download { width: 100%; }
}