/* BilibiliFilter — Mobile Web App Styles */
/* B 站蓝主题 (#00a1d6) + 移动优先卡片式视频 Feed */
/* 基于 RedNoteDeleted 样式适配 */

:root {
  --primary: #00a1d6;
  --primary-light: #e0f4ff;
  --primary-dark: #0088b9;
  --bg: #f6f7f9;
  --card-bg: #ffffff;
  --text: #18191c;
  --text-secondary: #9499a0;
  --border: #e3e5e7;
  --green: #22c55e;
  --red: #ef4444;
  --orange: #f59e0b;
  --purple: #8b5cf6;
  --safe-bottom: env(safe-area-inset-bottom, 16px);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 15px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  overscroll-behavior: none;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
}

#app {
  display: flex;
  flex-direction: column;
  height: 100vh;
  height: 100dvh;
  max-width: 500px;
  margin: 0 auto;
}

/* --- Header --- */
.app-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 16px;
  padding-top: max(12px, env(safe-area-inset-top, 0px));
  background: var(--card-bg);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}

.header-title {
  font-size: 18px;
  font-weight: 700;
}

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

.back-btn {
  background: none;
  border: none;
  font-size: 16px;
  color: var(--primary);
  cursor: pointer;
  padding: 4px 8px;
}

/* --- Feed Container --- */
.feed-container {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  -webkit-overflow-scrolling: touch;
  padding: 12px;
  padding-bottom: 80px;
}

/* --- States --- */
.state-message {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 60px 20px;
  text-align: center;
}
.state-message.hidden { display: none; }

.empty-icon { font-size: 64px; margin-bottom: 16px; }
.empty-title { font-size: 18px; font-weight: 700; margin-bottom: 8px; }
.empty-desc { font-size: 14px; color: var(--text-secondary); line-height: 1.6; margin-bottom: 20px; }

/* Spinner */
.spinner {
  width: 36px; height: 36px;
  border: 3px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin-bottom: 12px;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* --- Video Card --- */
.video-card {
  background: var(--card-bg);
  border-radius: 16px;
  overflow: hidden;
  margin-bottom: 16px;
  box-shadow: 0 2px 12px rgba(0,0,0,0.06);
  transition: transform 0.3s ease, opacity 0.3s ease;
  position: relative;
}
.video-card.reviewed { pointer-events: none; }
.video-card.swiping-left { transform: translateX(-120%) rotate(-10deg); opacity: 0; }
.video-card.swiping-right { transform: translateX(120%) rotate(10deg); opacity: 0; }

.card-cover-wrapper {
  position: relative;
  width: 100%;
  aspect-ratio: 16/9;
  overflow: hidden;
  background: #e8e8e8;
  cursor: pointer;
}
.card-cover-wrapper::after {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: transparent;
  transition: background 0.2s;
  pointer-events: none;
}
.card-cover-wrapper:active::after { background: rgba(0,0,0,0.08); }

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

.card-cover-placeholder {
  width: 100%; height: 100%;
  display: flex; align-items: center; justify-content: center;
  font-size: 48px;
  background: linear-gradient(135deg, var(--primary), #33c0e8);
  color: white;
}

/* B 站特有：时长叠加层 */
.card-duration-badge {
  position: absolute;
  bottom: 8px;
  right: 8px;
  background: rgba(0,0,0,0.7);
  color: #fff;
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 500;
}

/* B 站特有：播放量 */
.card-play-badge {
  position: absolute;
  bottom: 8px;
  left: 8px;
  background: rgba(0,0,0,0.6);
  color: #fff;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 11px;
  backdrop-filter: blur(4px);
}

/* 分数徽章 */
.card-score-badge {
  position: absolute;
  top: 8px;
  right: 8px;
  background: rgba(0,0,0,0.6);
  color: #fff;
  padding: 4px 10px;
  border-radius: 12px;
  font-size: 12px;
  font-weight: 600;
  backdrop-filter: blur(8px);
}
.card-score-badge.high { background: rgba(34,197,94,0.7); }
.card-score-badge.medium { background: rgba(245,158,11,0.7); }
.card-score-badge.low { background: rgba(239,68,68,0.7); }

.card-explore-badge {
  position: absolute;
  top: 8px;
  left: 8px;
  background: rgba(139,92,246,0.7);
  color: #fff;
  padding: 2px 8px;
  border-radius: 10px;
  font-size: 10px;
  backdrop-filter: blur(8px);
}

.card-body {
  padding: 12px 14px;
  cursor: pointer;
}

.card-title {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 6px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  line-height: 1.4;
}

.card-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--text-secondary);
  margin-bottom: 4px;
  flex-wrap: wrap;
}

.card-author {
  font-weight: 500;
}

/* 分区标签 */
.card-tid-tag {
  font-size: 10px;
  background: var(--primary-light);
  color: var(--primary);
  padding: 1px 6px;
  border-radius: 8px;
  white-space: nowrap;
}

.card-stats {
  display: flex;
  gap: 12px;
  font-size: 11px;
  color: var(--text-secondary);
  margin-top: 4px;
}

/* --- Card Actions --- */
.card-actions {
  display: flex;
  justify-content: space-around;
  align-items: center;
  padding: 10px 12px 14px;
  gap: 4px;
  border-top: 1px solid var(--border);
}

.card-action-btn {
  display: flex;
  align-items: center;
  gap: 4px;
  background: none;
  border: none;
  padding: 8px 14px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: transform 0.1s, background 0.15s;
  -webkit-tap-highlight-color: transparent;
  white-space: nowrap;
}
.card-action-btn:active { transform: scale(0.93); }
.dislike-action { color: var(--red); }
.dislike-action:active { background: #fee2e2; }
.like-action { color: var(--green); }
.like-action:active { background: #dcfce7; }
.link-action { color: #6366f1; }
.link-action:active { background: #e0e7ff; }
.play-action { color: #fb7299; }
.play-action:active { background: #fce4ec; }

/* --- Bottom Nav --- */
.bottom-nav {
  display: flex;
  justify-content: space-around;
  align-items: center;
  padding: 8px 0;
  padding-bottom: var(--safe-bottom);
  background: var(--card-bg);
  border-top: 1px solid var(--border);
  position: fixed;
  bottom: 0; left: 0; right: 0;
  z-index: 10;
  max-width: 500px;
  margin: 0 auto;
}

.nav-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  background: none;
  border: none;
  padding: 8px 24px;
  cursor: pointer;
  font-size: 14px;
  color: var(--text-secondary);
  transition: color 0.2s;
  -webkit-tap-highlight-color: transparent;
}
.nav-btn.active { color: var(--primary); }
.nav-icon { font-size: 22px; }
.nav-label { font-size: 11px; font-weight: 500; }

/* --- Preferences Page --- */
.page {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: var(--bg);
  z-index: 20;
  overflow-y: auto;
  max-width: 500px;
  margin: 0 auto;
}
.page.hidden { display: none; }

.prefs-content {
  padding: 16px;
  padding-bottom: 80px;
}

/* --- Login Form --- */
.login-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 80vh;
  padding: 20px;
}

.login-form {
  width: 100%;
  max-width: 320px;
  background: var(--card-bg);
  border-radius: 16px;
  padding: 24px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.08);
}
.login-form h2 { text-align: center; margin-bottom: 20px; font-size: 20px; }

.form-group { margin-bottom: 14px; }
.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 4px;
  color: var(--text-secondary);
}
.form-group input {
  width: 100%;
  padding: 10px 14px;
  border: 1.5px solid var(--border);
  border-radius: 10px;
  font-size: 15px;
  outline: none;
  transition: border-color 0.2s;
}
.form-group input:focus { border-color: var(--primary); }

.error-msg {
  color: var(--red);
  font-size: 13px;
  text-align: center;
  margin-top: 8px;
}

/* --- Buttons --- */
.btn {
  padding: 12px 24px;
  border: none;
  border-radius: 12px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.1s;
  -webkit-tap-highlight-color: transparent;
}
.btn:active { transform: scale(0.97); }
.btn-primary {
  background: var(--primary);
  color: #fff;
  width: 100%;
  max-width: 280px;
}
.btn-secondary { background: #f0f0f0; color: var(--text); }

/* --- Toast --- */
.toast {
  position: fixed;
  top: 60px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(0,0,0,0.8);
  color: #fff;
  padding: 10px 20px;
  border-radius: 20px;
  font-size: 13px;
  z-index: 100;
  animation: fadeInOut 2s ease forwards;
  pointer-events: none;
}
@keyframes fadeInOut {
  0% { opacity: 0; transform: translateX(-50%) translateY(-10px); }
  15% { opacity: 1; transform: translateX(-50%) translateY(0); }
  85% { opacity: 1; }
  100% { opacity: 0; }
}

/* --- Detail Modal --- */
.detail-modal {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: var(--bg);
  z-index: 30;
  display: flex;
  flex-direction: column;
  max-width: 500px;
  margin: 0 auto;
}
.detail-modal.hidden { display: none; }

.detail-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 16px;
  padding-top: max(12px, env(safe-area-inset-top, 0px));
  background: var(--card-bg);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}

.detail-content {
  flex: 1;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

.detail-cover-wrapper {
  width: 100%;
  background: #000;
  position: relative;
}
.detail-cover-wrapper img {
  width: 100%;
  display: block;
  object-fit: contain;
  max-height: 40vh;
}
.detail-cover-placeholder {
  width: 100%;
  aspect-ratio: 16/9;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 64px;
  background: linear-gradient(135deg, var(--primary), #33c0e8);
  color: white;
}

.detail-body {
  padding: 16px;
}

.detail-title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 10px;
  line-height: 1.5;
}

.detail-meta {
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 8px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.detail-tid {
  display: inline-block;
  font-size: 11px;
  background: var(--primary-light);
  color: var(--primary);
  padding: 2px 8px;
  border-radius: 10px;
}

.detail-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 13px;
  color: var(--text-secondary);
  padding: 12px 0;
  border-top: 1px solid var(--border);
}

.detail-desc {
  font-size: 15px;
  line-height: 1.7;
  color: var(--text);
  margin-bottom: 16px;
  white-space: pre-wrap;
  word-break: break-word;
}

.detail-tags-hint {
  font-size: 11px;
  color: #999;
  margin-bottom: 8px;
}
.detail-tag-chip {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 12px;
  padding: 4px 10px;
  border-radius: 14px;
  cursor: pointer;
  transition: all 0.15s;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
  margin: 2px;
}
.detail-tag-chip.selected {
  background: var(--primary-light);
  color: var(--primary);
  border: 1.5px solid var(--primary);
  font-weight: 600;
}
.detail-tag-chip.unselected {
  background: #f5f5f5;
  color: #999;
  border: 1.5px solid #e5e5e5;
  text-decoration: line-through;
}

/* Detail actions */
.detail-actions {
  display: flex;
  gap: 12px;
  padding: 8px 0 4px;
}
.detail-action-btn {
  flex: 1;
  padding: 12px;
  border: none;
  border-radius: 12px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.15s;
}
.detail-action-btn:active { transform: scale(0.95); }
.detail-action-btn.like { background: linear-gradient(135deg, #ff6b6b, #ee5a24); color: white; }
.detail-action-btn.dislike { background: #f0f0f0; color: #666; }

/* --- Player Modal --- */
.player-modal {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: #000;
  z-index: 35;
  display: flex;
  flex-direction: column;
  max-width: 500px;
  margin: 0 auto;
}
.player-modal.hidden { display: none; }

.player-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 16px;
  padding-top: max(12px, env(safe-area-inset-top, 0px));
  background: rgba(0,0,0,0.85);
  border-bottom: 1px solid rgba(255,255,255,0.1);
  position: sticky;
  top: 0;
  z-index: 10;
}

.player-header .header-title {
  color: #fff;
  font-size: 16px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  flex: 1;
  margin: 0 12px;
}

.player-content {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.player-iframe-wrapper {
  width: 100%;
  aspect-ratio: 16 / 9;
  max-height: 100%;
  position: relative;
}

.player-iframe-wrapper iframe {
  width: 100%;
  height: 100%;
  border: none;
  position: absolute;
  top: 0; left: 0;
}

/* --- Detail Cover Play Overlay --- */
.detail-play-overlay-btn {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: rgba(0,0,0,0.55);
  color: #fff;
  border: 2px solid rgba(255,255,255,0.8);
  border-radius: 50%;
  width: 56px;
  height: 56px;
  font-size: 0;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.15s, background 0.15s;
  -webkit-tap-highlight-color: transparent;
  z-index: 5;
}

.detail-play-overlay-btn::after {
  content: '▶';
  font-size: 22px;
  margin-left: 3px;
}

.detail-play-overlay-btn:active {
  transform: translate(-50%, -50%) scale(0.9);
  background: rgba(0,0,0,0.75);
}

/* --- Detail Embedded Player --- */
.detail-player-wrapper {
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #000;
  position: relative;
}

.detail-player-wrapper iframe {
  width: 100%;
  height: 100%;
  border: none;
  position: absolute;
  top: 0; left: 0;
}

.detail-player-close-btn {
  position: absolute;
  top: 8px;
  right: 8px;
  background: rgba(0,0,0,0.65);
  color: #fff;
  border: none;
  border-radius: 6px;
  padding: 6px 12px;
  font-size: 13px;
  cursor: pointer;
  z-index: 5;
  -webkit-tap-highlight-color: transparent;
}

.detail-player-close-btn:active {
  background: rgba(0,0,0,0.85);
}

/* --- Prefs Styles --- */
.pref-group {
  background: var(--card-bg);
  border-radius: 12px;
  padding: 16px;
  margin-bottom: 12px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.04);
}
.pref-group-title {
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--primary);
}
.pref-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 0;
  border-bottom: 1px solid #f5f5f5;
}
.pref-row:last-child { border-bottom: none; }
.pref-emoji { font-size: 18px; width: 28px; text-align: center; }
.pref-name {
  flex: 1;
  font-size: 13px;
  font-weight: 500;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.pref-bar-bg { width: 60px; height: 4px; background: #eee; border-radius: 2px; overflow: hidden; flex-shrink: 0; }
.pref-bar-fill { height: 100%; border-radius: 2px; }
.pref-bar-fill.pos { background: var(--green); }
.pref-bar-fill.neg { background: var(--red); }
.pref-weight-val { width: 42px; text-align: right; font-size: 12px; font-weight: 600; flex-shrink: 0; }

.pref-source-badge {
  font-size: 10px; padding: 1px 6px; border-radius: 8px; font-weight: 600;
  flex-shrink: 0; white-space: nowrap;
}
.pref-source-badge.manual { background: #fef3c7; color: #92400e; }
.pref-source-badge.learned { background: #e0e7ff; color: #3730a3; }

.pref-delete-btn {
  background: none; border: none; color: #ccc; font-size: 16px;
  cursor: pointer; padding: 2px 6px; border-radius: 4px; flex-shrink: 0;
}
.pref-delete-btn:active { color: var(--red); background: #fee2e2; }

.pref-adj-btn {
  width: 26px; height: 26px; border-radius: 50%;
  border: 1.5px solid #e5e5e5; background: #fafafa;
  font-size: 14px; font-weight: 700; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.pref-adj-btn.boost { color: var(--green); }
.pref-adj-btn.boost:active { background: #dcfce7; border-color: var(--green); }
.pref-adj-btn.weaken { color: var(--red); }
.pref-adj-btn.weaken:active { background: #fee2e2; border-color: var(--red); }

.pref-row.manual { background: #fffbeb; border-radius: 8px; padding-left: 6px; padding-right: 6px; }

/* Pref tabs */
.pref-tabs {
  display: flex; gap: 8px; margin-bottom: 16px; padding: 4px;
  background: var(--card-bg); border-radius: 10px;
}
.pref-tab {
  flex: 1; padding: 8px 0; border: none; border-radius: 8px;
  background: transparent; font-size: 13px; font-weight: 600;
  color: #888; cursor: pointer; transition: all 0.2s;
}
.pref-tab.active { background: #fff; color: var(--primary); box-shadow: 0 1px 3px rgba(0,0,0,0.1); }

/* Pref form */
.pref-form-section {
  background: var(--card-bg); border-radius: 12px; padding: 16px;
  margin-bottom: 16px; box-shadow: 0 1px 4px rgba(0,0,0,0.04);
}
.pref-form-title { font-size: 14px; font-weight: 700; margin-bottom: 12px; color: var(--primary); }
.pref-form-row { display: flex; gap: 8px; margin-bottom: 10px; align-items: center; }
.pref-form-input {
  flex: 1; padding: 10px 14px; border: 1.5px solid var(--border);
  border-radius: 10px; font-size: 14px; outline: none; min-width: 0;
}
.pref-form-input:focus { border-color: var(--primary); }
.pref-form-select {
  padding: 10px 12px; border: 1.5px solid var(--border);
  border-radius: 10px; font-size: 13px; background: white; outline: none; cursor: pointer;
}
.pref-form-toggle { display: flex; border-radius: 10px; overflow: hidden; border: 1.5px solid var(--border); flex-shrink: 0; }
.pref-toggle-btn {
  padding: 10px 16px; border: none; background: #f9f9f9;
  font-size: 14px; cursor: pointer; font-weight: 500;
}
.pref-toggle-btn.active-like { background: var(--green); color: white; }
.pref-toggle-btn.active-dislike { background: var(--red); color: white; }
.pref-form-submit {
  width: 100%; padding: 10px; border: none; border-radius: 10px;
  background: var(--primary); color: white; font-size: 14px; font-weight: 600;
  cursor: pointer;
}
.pref-form-submit:active { transform: scale(0.97); }
.pref-form-submit:disabled { background: #ccc; cursor: not-allowed; }

/* Pref toolbar */
.pref-toolbar { display: flex; gap: 8px; margin-bottom: 12px; }
.pref-toolbar-btn {
  flex: 1; padding: 10px 8px; border: none; border-radius: 10px;
  font-size: 13px; font-weight: 600; cursor: pointer;
}
.pref-toolbar-btn:active { transform: scale(0.97); }
.pref-toolbar-btn.danger { background: #fef2f2; color: #dc2626; border: 1.5px solid #fecaca; }
.pref-toolbar-btn.warning { background: #fffbeb; color: #d97706; border: 1.5px solid #fde68a; }

/* Stats bar */
.pref-stats-bar {
  display: flex; gap: 16px; margin-bottom: 16px; padding: 14px 16px;
  background: var(--card-bg); border-radius: 10px; box-shadow: 0 1px 3px rgba(0,0,0,0.06);
}
.pref-stat-item { display: flex; align-items: center; gap: 8px; }
.pref-stat-label { font-size: 13px; color: var(--text-secondary); }
.pref-stat-value { font-size: 20px; font-weight: 700; color: var(--primary); }

/* Composite rule card */
.composite-rule-card {
  background: #fff; border-radius: 10px; padding: 12px;
  margin: 8px 0; box-shadow: 0 1px 3px rgba(0,0,0,0.08);
}
.composite-rule-btn {
  font-size: 11px; padding: 4px 8px; border: 1px solid #ddd;
  border-radius: 4px; background: #f9f9f9; cursor: pointer;
}

@media (prefers-color-scheme: dark) {
  /* Light mode only for now */
}