/* ShelfBuffer — dark-first UI */

:root,
[data-theme='dark'] {
  color-scheme: dark;
  --bg: #050506;
  --bg-subtle: #0a0a0c;
  --bg-elevated: #111114;
  --bg-card: #16161a;
  --bg-hover: #1c1c22;
  --fg: #f4f4f5;
  --fg-secondary: #d4d4d8;
  --muted: #71717a;
  --border: #27272a;
  --border-strong: #3f3f46;
  --accent: #6366f1;
  --accent-bright: #818cf8;
  --accent-soft: rgba(99, 102, 241, 0.14);
  --accent-glow: rgba(99, 102, 241, 0.35);
  --success: #34d399;
  --success-soft: rgba(52, 211, 153, 0.12);
  --warn: #fbbf24;
  --warn-soft: rgba(251, 191, 36, 0.1);
  --error: #f87171;
  --error-soft: rgba(248, 113, 113, 0.1);
  --radius: 14px;
  --radius-sm: 10px;
  --radius-xs: 6px;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.5);
  --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.45);
  --header-blur: rgba(5, 5, 6, 0.82);
  --mesh-1: rgba(99, 102, 241, 0.08);
  --mesh-2: rgba(52, 211, 153, 0.05);
  --font:
    'SF Pro Text',
    system-ui,
    -apple-system,
    'Segoe UI',
    Roboto,
    sans-serif;
}

[data-theme='light'] {
  color-scheme: light;
  --bg: #f8fafc;
  --bg-subtle: #f1f5f9;
  --bg-elevated: #ffffff;
  --bg-card: #ffffff;
  --bg-hover: #f1f5f9;
  --fg: #0f172a;
  --fg-secondary: #334155;
  --muted: #64748b;
  --border: #e2e8f0;
  --border-strong: #cbd5e1;
  --accent: #4f46e5;
  --accent-bright: #6366f1;
  --accent-soft: rgba(79, 70, 229, 0.1);
  --accent-glow: rgba(79, 70, 229, 0.2);
  --success: #059669;
  --success-soft: rgba(5, 150, 105, 0.1);
  --warn: #d97706;
  --warn-soft: rgba(217, 119, 6, 0.08);
  --error: #dc2626;
  --error-soft: rgba(220, 38, 38, 0.08);
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 12px 40px rgba(15, 23, 42, 0.08);
  --header-blur: rgba(248, 250, 252, 0.88);
  --mesh-1: rgba(79, 70, 229, 0.06);
  --mesh-2: rgba(5, 150, 105, 0.04);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--fg);
  line-height: 1.55;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -1;
  background:
    radial-gradient(ellipse 80% 50% at 50% -20%, var(--mesh-1), transparent 55%),
    radial-gradient(ellipse 60% 40% at 100% 0%, var(--mesh-2), transparent 50%),
    var(--bg);
}

a {
  color: var(--accent-bright);
  text-decoration: none;
  transition: color 0.15s;
}

a:hover {
  color: var(--accent);
  text-decoration: underline;
}

code {
  font-size: 0.88em;
  padding: 0.12em 0.4em;
  border-radius: var(--radius-xs);
  background: var(--bg-hover);
  border: 1px solid var(--border);
}

.wrap {
  max-width: 42rem;
  margin: 0 auto;
  padding: 0 1.15rem 4rem;
}

/* —— Header —— */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid var(--border);
  background: var(--header-blur);
  backdrop-filter: blur(16px) saturate(1.2);
  -webkit-backdrop-filter: blur(16px) saturate(1.2);
  margin-bottom: 1.5rem;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  min-width: 0;
}

.brand-mark {
  flex-shrink: 0;
  width: 2.5rem;
  height: 2.5rem;
  display: grid;
  place-items: center;
  border-radius: var(--radius-sm);
  background: linear-gradient(145deg, var(--accent-soft), transparent);
  border: 1px solid color-mix(in srgb, var(--accent) 35%, var(--border));
  color: var(--accent-bright);
  font-size: 1.15rem;
  box-shadow: 0 0 20px var(--accent-glow);
}

h1 {
  margin: 0;
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--fg);
}

.tagline {
  margin: 0.12rem 0 0;
  font-size: 0.8rem;
  color: var(--muted);
  letter-spacing: 0.01em;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-shrink: 0;
}

.theme-toggle {
  height: 2.25rem;
  padding: 0 0.65rem;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-strong);
  background: var(--bg-card);
  color: var(--fg-secondary);
  font-size: 0.78rem;
  font-weight: 600;
  line-height: 1;
  transition:
    border-color 0.15s,
    color 0.15s,
    background 0.15s;
}

.theme-toggle-label {
  letter-spacing: 0.02em;
}

.theme-toggle:hover {
  border-color: var(--border-strong);
  color: var(--fg);
  background: var(--bg-hover);
}

.theme-toggle .icon-light {
  display: none;
}

[data-theme='light'] .theme-toggle .icon-dark {
  display: none;
}

[data-theme='light'] .theme-toggle .icon-light {
  display: block;
}

.health-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  justify-content: flex-end;
}

.badge {
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 0.22rem 0.55rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--muted);
  background: var(--bg-card);
}

.badge.ok {
  border-color: color-mix(in srgb, var(--success) 50%, var(--border));
  color: var(--success);
  background: var(--success-soft);
}

.badge.bad {
  border-color: color-mix(in srgb, var(--error) 50%, var(--border));
  color: var(--error);
  background: var(--error-soft);
}

/* —— Cards —— */

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.15rem 1.25rem;
  margin-bottom: 1rem;
  box-shadow: var(--shadow-sm);
  transition: border-color 0.2s;
}

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

.card-intro {
  padding: 1rem 1.2rem;
  background: linear-gradient(
    135deg,
    var(--bg-card) 0%,
    color-mix(in srgb, var(--bg-card) 90%, var(--accent-soft)) 100%
  );
}

.intro-text {
  margin: 0;
  font-size: 0.9rem;
  color: var(--fg-secondary);
  line-height: 1.6;
}

.intro-hint {
  margin: 0.65rem 0 0;
  padding: 0.55rem 0.7rem;
  font-size: 0.82rem;
  color: var(--muted);
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--accent);
  background: var(--accent-soft);
}

label {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 0.4rem;
  color: var(--muted);
}

input[type='url'],
input[type='number'] {
  width: 100%;
  padding: 0.7rem 0.85rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg-subtle);
  color: var(--fg);
  font-size: 0.95rem;
  transition:
    border-color 0.15s,
    box-shadow 0.15s;
}

input[type='url']:focus,
input[type='number']:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

input[type='number'] {
  max-width: 5.5rem;
}

.field-row {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: 0.85rem;
  margin-top: 1rem;
}

.field-grow {
  flex: 1;
  min-width: 8rem;
}

/* —— Buttons —— */

button {
  font: inherit;
  cursor: pointer;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  transition:
    transform 0.12s,
    opacity 0.15s,
    background 0.15s,
    border-color 0.15s,
    box-shadow 0.15s;
}

button:active:not(:disabled) {
  transform: scale(0.98);
}

button:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.btn-primary {
  padding: 0.65rem 1.25rem;
  background: linear-gradient(180deg, var(--accent-bright), var(--accent));
  color: #fff;
  font-weight: 650;
  white-space: nowrap;
  border: none;
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.12) inset,
    0 4px 14px var(--accent-glow);
}

.btn-primary:hover:not(:disabled) {
  filter: brightness(1.06);
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.15) inset,
    0 6px 20px var(--accent-glow);
}

.btn-ghost {
  padding: 0.48rem 0.8rem;
  background: var(--bg-subtle);
  border-color: var(--border);
  color: var(--fg-secondary);
  font-size: 0.85rem;
}

.btn-ghost:hover:not(:disabled) {
  background: var(--bg-hover);
  border-color: var(--border-strong);
  color: var(--fg);
}

.btn-sm {
  padding: 0.38rem 0.7rem;
  font-size: 0.78rem;
}

/* —— Banners —— */

.banner {
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  margin: 0 0 1rem;
  line-height: 1.45;
}

.banner-error {
  border: 1px solid color-mix(in srgb, var(--error) 35%, var(--border));
  background: var(--error-soft);
  color: var(--error);
  font-weight: 600;
}

.banner-warn {
  border: 1px solid color-mix(in srgb, var(--warn) 35%, var(--border));
  background: var(--warn-soft);
  color: var(--warn);
}

/* —— Series block —— */

.series-top {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.85rem;
  margin-bottom: 1rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border);
}

.series-top h2 {
  margin: 0;
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.meta {
  margin: 0.25rem 0 0;
  font-size: 0.82rem;
  color: var(--muted);
  word-break: break-all;
}

.stat-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  align-items: center;
}

.chip {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.3rem 0.65rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--muted);
  background: var(--bg-subtle);
}

.chip-success {
  border-color: color-mix(in srgb, var(--success) 45%, var(--border));
  color: var(--success);
  background: var(--success-soft);
}

.chip-muted {
  background: var(--bg-hover);
}

/* —— Queue panel —— */

.queue-panel {
  padding: 1rem 1.1rem;
  border-radius: var(--radius-sm);
  border: 1px solid color-mix(in srgb, var(--accent) 40%, var(--border));
  background: linear-gradient(
    160deg,
    var(--accent-soft) 0%,
    var(--bg-subtle) 70%
  );
  margin-bottom: 1rem;
  box-shadow: var(--shadow-md);
}

.queue-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.queue-head strong {
  font-size: 0.95rem;
  color: var(--fg);
}

.queue-sub {
  display: block;
  font-size: 0.8rem;
  color: var(--muted);
  font-weight: 400;
  margin-top: 0.2rem;
}

.progress-block {
  margin-bottom: 0.5rem;
}

.progress-label {
  display: flex;
  justify-content: space-between;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.35rem;
}

progress {
  width: 100%;
  height: 6px;
  border-radius: 999px;
  overflow: hidden;
  appearance: none;
  border: none;
  background: transparent;
}

progress::-webkit-progress-bar {
  background: var(--bg-hover);
  border-radius: 999px;
}

progress::-webkit-progress-value {
  background: linear-gradient(90deg, var(--accent), var(--accent-bright));
  border-radius: 999px;
  transition: width 0.3s ease;
}

progress.is-waiting::-webkit-progress-value {
  background: linear-gradient(
    90deg,
    var(--accent),
    var(--accent-bright),
    var(--accent)
  );
  animation: progress-shimmer 1.4s ease-in-out infinite;
}

progress::-moz-progress-bar {
  background: linear-gradient(90deg, var(--accent), var(--accent-bright));
  border-radius: 999px;
}

@keyframes progress-shimmer {
  0%,
  100% {
    opacity: 0.65;
  }
  50% {
    opacity: 1;
  }
}

.queue-status {
  margin: 0;
  font-size: 0.82rem;
  color: var(--muted);
}

/* —— Selection & actions —— */

.select-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
  margin-bottom: 0.75rem;
  padding: 0.55rem 0.7rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg-subtle);
}

.select-label {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
  margin-right: 0.15rem;
}

.select-count {
  font-size: 0.78rem;
  color: var(--muted);
  margin-left: auto;
  font-variant-numeric: tabular-nums;
}

.action-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  align-items: center;
  margin-bottom: 1rem;
}

.export-menu {
  font-size: 0.85rem;
  color: var(--muted);
}

.export-menu summary {
  cursor: pointer;
  padding: 0.48rem 0.75rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg-subtle);
  list-style: none;
  color: var(--fg-secondary);
  transition: background 0.15s;
}

.export-menu summary:hover {
  background: var(--bg-hover);
}

.export-menu[open] summary {
  border-color: var(--accent);
  color: var(--accent-bright);
}

.export-menu summary::-webkit-details-marker {
  display: none;
}

.export-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.55rem;
  padding: 0.5rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg-card);
}

/* —— Episode list —— */

.ep-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.ep-card {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.65rem 0.75rem;
  background: var(--bg-subtle);
  transition:
    border-color 0.2s,
    background 0.2s,
    box-shadow 0.2s;
}

.ep-card:hover {
  background: var(--bg-hover);
}

.ep-card.is-active {
  border-color: color-mix(in srgb, var(--accent) 55%, var(--border));
  background: color-mix(in srgb, var(--accent-soft) 60%, var(--bg-subtle));
  box-shadow: 0 0 0 1px var(--accent-glow);
}

.ep-card.is-downloaded {
  border-color: color-mix(in srgb, var(--success) 35%, var(--border));
  background: var(--success-soft);
}

.ep-card.is-failed {
  border-color: color-mix(in srgb, var(--error) 45%, var(--border));
  background: var(--error-soft);
}

.ep-card.is-in-plan {
  border-left: 3px solid var(--accent);
}

.ep-row-top {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 0.6rem;
  align-items: start;
}

.ep-pick-label {
  display: flex;
  align-items: flex-start;
  padding-top: 0.2rem;
  cursor: pointer;
}

.ep-pick {
  width: 1.05rem;
  height: 1.05rem;
  accent-color: var(--accent);
  cursor: pointer;
}

.ep-card.is-selected {
  border-color: color-mix(in srgb, var(--accent) 40%, var(--border));
}

.ep-done-tag {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.65rem;
  font-weight: 700;
  color: var(--success);
  margin-left: 0.4rem;
  width: 1.1rem;
  height: 1.1rem;
  border-radius: 50%;
  background: var(--success-soft);
  border: 1px solid color-mix(in srgb, var(--success) 40%, transparent);
}

.ep-title {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--fg);
  line-height: 1.35;
}

.ep-phase {
  display: block;
  font-size: 0.76rem;
  color: var(--muted);
  margin-top: 0.15rem;
  min-height: 1.1em;
}

.ep-pipeline {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem 0.45rem;
  margin: 0.4rem 0 0;
  padding: 0;
  font-size: 0.65rem;
}

.ep-pipeline[hidden] {
  display: none;
}

.ep-pipeline li {
  padding: 0.15rem 0.45rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--muted);
  background: var(--bg-card);
  opacity: 0.5;
  transition:
    opacity 0.2s,
    border-color 0.2s,
    background 0.2s;
}

.ep-pipeline li.is-done {
  opacity: 0.75;
  color: var(--fg-secondary);
  border-color: color-mix(in srgb, var(--success) 30%, var(--border));
}

.ep-pipeline li.is-active {
  opacity: 1;
  color: var(--accent-bright);
  border-color: var(--accent);
  background: var(--accent-soft);
  font-weight: 600;
  box-shadow: 0 0 12px var(--accent-glow);
}

.ep-progress {
  width: 100%;
  height: 4px;
  margin-top: 0.5rem;
}

.ep-progress[hidden] {
  display: none;
}

.ep-actions {
  display: flex;
  gap: 0.3rem;
}

.icon-btn {
  width: 2rem;
  height: 2rem;
  padding: 0;
  display: grid;
  place-items: center;
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--muted);
  font-size: 0.9rem;
  border-radius: var(--radius-sm);
}

.icon-btn:hover:not(:disabled) {
  border-color: var(--accent);
  color: var(--accent-bright);
  background: var(--accent-soft);
  box-shadow: 0 0 12px var(--accent-glow);
}

/* —— Loading state on submit —— */

#submit.is-loading {
  position: relative;
  color: transparent;
  pointer-events: none;
}

#submit.is-loading::after {
  content: '';
  position: absolute;
  inset: 50% auto auto 50%;
  width: 1rem;
  height: 1rem;
  margin: -0.5rem 0 0 -0.5rem;
  border: 2px solid rgba(255, 255, 255, 0.35);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

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

/* —— Responsive —— */

@media (max-width: 520px) {
  .header-inner {
    flex-wrap: wrap;
  }

  .header-actions {
    width: 100%;
    justify-content: space-between;
  }

  .field-row {
    flex-direction: column;
    align-items: stretch;
  }

  .btn-primary {
    width: 100%;
  }

  .select-count {
    width: 100%;
    margin-left: 0;
    margin-top: 0.25rem;
  }
}

.app-footer {
  padding: 0 1.15rem 2rem;
  text-align: center;
}

.app-version {
  font-size: 0.68rem;
  color: var(--muted);
  letter-spacing: 0.04em;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}