* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --bg: #ffffff;
  --text: #111827;
  --text-secondary: #6B7280;
  --chip-bg: #F3F4F6;
  --chip-active-bg: #111827;
  --chip-active-text: #ffffff;
  --border: #E5E7EB;
  --accent: #16A34A;
}

body {
  font-family: "Inter", "Segoe UI", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}

.hidden { display: none !important; }

/* ---------- Topbar ---------- */
#topbar {
  position: sticky;
  top: 0;
  z-index: 100;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  height: 56px;
  padding: 0 16px;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}

.topbar-left {
  display: flex;
  align-items: center;
  gap: 8px;
}

.logo-img {
  height: 28px;
  width: 28px;
  max-width: 28px;
  max-height: 28px;
  flex-shrink: 0;
  object-fit: contain;
}

.logo-block {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.logo-text {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.5px;
}

.logo-tagline {
  font-size: 10px;
  color: var(--text-secondary);
  letter-spacing: 0.2px;
}

.topbar-center {
  display: flex;
  justify-content: center;
}

.topbar-right {
  display: flex;
  justify-content: flex-end;
  align-items: center;
}

/* ---------- Source toggle ---------- */
#source-toggle {
  display: flex;
  gap: 2px;
  background: var(--chip-bg);
  border-radius: 10px;
  padding: 3px;
}

.src-btn {
  padding: 6px 14px;
  font-size: 13px;
  font-weight: 500;
  border: none;
  border-radius: 8px;
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.15s, color 0.15s;
}

.src-btn:hover { background: #E5E7EB; color: var(--text); }

.src-btn.active {
  background: var(--chip-active-bg);
  color: var(--chip-active-text);
}

/* ---------- CTA button ---------- */
#new-feed-btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  height: 38px;
  padding: 0 20px;
  font-size: 14px;
  font-weight: 600;
  border: none;
  border-radius: 8px;
  background: var(--accent);
  color: #fff;
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.15s, transform 0.1s;
}

#new-feed-btn:hover { background: #15803D; }
#new-feed-btn:active { transform: scale(0.97); }

/* ---------- Slogan bar ---------- */
#slogan-bar {
  padding: 8px 16px;
  font-size: 13px;
  color: var(--text-secondary);
  text-align: center;
  border-bottom: 1px solid var(--border);
}

/* ---------- Toolbar ---------- */
#toolbar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border-bottom: 1px solid var(--border);
}

.compact-selector {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 10px;
  border: 1.5px solid var(--border);
  border-radius: 20px;
  background: var(--bg);
  cursor: pointer;
  user-select: none;
  transition: background 0.12s, border-color 0.12s;
}

.compact-selector:hover { background: var(--chip-bg); border-color: transparent; }

.compact-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.4px;
}

.topic-thumb-icon {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  color: var(--text);
}

.summary-all {
  font-size: 13px;
  font-weight: 500;
  color: var(--text);
}

.summary-overflow {
  font-size: 12px;
  color: var(--text-secondary);
}

#presets-summary span {
  font-size: 13px;
  font-weight: 500;
}

.preset-icon {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
}

.chevron-icon {
  flex-shrink: 0;
  color: var(--text-secondary);
  transition: transform 0.2s ease;
}

.chevron-icon.open { transform: rotate(180deg); }

/* ---------- Category panel ---------- */
#category-panel {
  max-width: 960px;
  margin: 0 auto;
  padding: 16px 24px 24px;
}

.category-panel-intro {
  font-size: 14px;
  color: var(--text-secondary);
  text-align: center;
  margin-bottom: 20px;
  line-height: 1.5;
}

#category-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 12px;
}

.category-card {
  padding: 14px;
  border: 1.5px solid var(--border);
  border-radius: 12px;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 4px;
  transition: border-color 0.15s, background 0.15s;
}

.category-card:hover { background: #F9FAFB; }

.category-card.selected {
  border-color: var(--accent);
  background: #F0FDF4;
}

.category-card.selected .cat-icon {
  color: var(--accent);
}

.cat-icon {
  display: flex;
  align-items: center;
  color: var(--text-secondary);
  margin-bottom: 2px;
}

.cat-label { font-size: 15px; font-weight: 500; }
.cat-hint { font-size: 12px; color: var(--text-secondary); }

/* ---------- Chips (filters-row) ---------- */
.chip {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 6px 13px;
  font-size: 13px;
  font-weight: 500;
  border: 1.5px solid var(--border);
  border-radius: 20px;
  background: var(--bg);
  color: var(--text);
  cursor: pointer;
  white-space: nowrap;
  font-family: inherit;
  transition: background 0.12s, border-color 0.12s, color 0.12s;
}

.chip:hover {
  background: var(--chip-bg);
  border-color: transparent;
}

.chip.active {
  background: var(--chip-active-bg);
  color: var(--chip-active-text);
  border-color: transparent;
}

/* ---------- Flyouts ---------- */
.topics-flyout {
  padding: 16px 24px 24px;
  border-bottom: 1px solid var(--border);
  background: var(--bg);
}

.flyout-actions {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
}

.presets-flyout {
  position: fixed;
  z-index: 150;
  background: var(--bg);
  border: 1.5px solid var(--border);
  border-radius: 12px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
  padding: 6px;
  min-width: 200px;
}

.preset-option {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 9px 12px;
  border: none;
  background: none;
  border-radius: 8px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
  font-family: inherit;
  color: var(--text);
  text-align: left;
  transition: background 0.1s;
}

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

.preset-option.active {
  background: var(--chip-active-bg);
  color: var(--chip-active-text);
}

.preset-option.yt-only-disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

/* ---------- Video grid ---------- */
main { padding: 8px 24px 40px; }

.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 40px 16px;
}

.video-card { cursor: pointer; }

.thumb-wrap {
  position: relative;
  border-radius: 12px;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background: #e8e8e8;
}

.thumb-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.duration-badge {
  position: absolute;
  right: 8px;
  bottom: 8px;
  padding: 1px 6px;
  font-size: 12px;
  font-weight: 500;
  color: #fff;
  background: rgba(0, 0, 0, 0.8);
  border-radius: 4px;
}

.video-meta { display: flex; gap: 12px; margin-top: 12px; }

.channel-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: #d5d5e5;
  color: #444;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  font-weight: 500;
  flex-shrink: 0;
}

.video-title {
  font-size: 15px;
  font-weight: 500;
  line-height: 1.4;
  max-height: 2.8em;
  overflow: hidden;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}

.video-sub {
  margin-top: 4px;
  font-size: 13px;
  color: var(--text-secondary);
}

.card-badges {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
  margin-top: 6px;
}

.cat-badge, .source-badge {
  display: inline-block;
  padding: 2px 8px;
  font-size: 11px;
  border-radius: 10px;
  background: var(--chip-bg);
  color: var(--text-secondary);
}

.src-youtube { background: #fff0f0; color: #c00; }
.src-vk      { background: #f0f4ff; color: #2060c0; }
.src-rutube  { background: #fff4f0; color: #c04000; }

.error-msg {
  grid-column: 1 / -1;
  padding: 24px;
  color: #c00;
  font-size: 14px;
}

/* ---------- Skeleton ---------- */
.skeleton .thumb-wrap,
.skeleton .sk-line,
.skeleton .channel-avatar {
  background: linear-gradient(90deg, #eee 25%, #f7f7f7 50%, #eee 75%);
  background-size: 200% 100%;
  animation: shimmer 1.4s infinite;
}

.sk-line { height: 14px; border-radius: 4px; margin-top: 8px; }
.sk-line.short { width: 60%; }

@keyframes shimmer {
  from { background-position: 200% 0; }
  to { background-position: -200% 0; }
}

/* ---------- Player modal ---------- */
#player-modal {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
}

.modal-dialog {
  position: relative;
  width: min(960px, 92vw);
  background: var(--bg);
  border-radius: 12px;
  overflow: hidden;
}

#modal-close {
  position: absolute;
  top: 8px;
  right: 8px;
  z-index: 2;
  width: 32px;
  height: 32px;
  border: none;
  border-radius: 50%;
  background: rgba(0, 0, 0, 0.6);
  color: #fff;
  font-size: 15px;
  cursor: pointer;
}

.player-wrap { aspect-ratio: 16 / 9; background: #000; }

.player-wrap iframe { width: 100%; height: 100%; display: block; }

.modal-info { padding: 14px 18px 18px; }

#modal-title { font-size: 17px; font-weight: 500; }

#modal-channel {
  margin-top: 4px;
  font-size: 13px;
  color: var(--text-secondary);
}

@media (max-width: 600px) {
  main { padding: 8px 12px 40px; }
  .video-grid { grid-template-columns: 1fr; }
  .logo-tagline { display: none; }
  #new-feed-btn { padding: 0 12px; font-size: 13px; }
  .topics-flyout { padding: 12px; }
  #category-grid { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); }
}