/**
 * 2026 UI 升级版 - Mood Mode + Glassmorphism + Bento Grid
 * 情绪模式 · 磨砂玻璃 · 便当盒布局 · 微交互
 */

/* ===== 情绪模式变量系统 ===== */
:root {
  /* 默认 = Night 模式（深邃夜间） */
  --bg-primary: #000000;
  --bg-secondary: rgba(13, 13, 18, 0.75);
  --bg-card: rgba(30, 30, 40, 0.65);
  --bg-hover: rgba(50, 50, 65, 0.7);
  
  --primary-color: #ff6b35;
  --primary-hover: #ff8c5a;
  --primary-gradient: linear-gradient(135deg, #ff6b35 0%, #ff9048 100%);
  --accent-glow: rgba(255, 107, 53, 0.25);
  
  --text-primary: #ffffff;
  --text-secondary: #a0a0b0;
  --text-muted: #5a5a6a;
  
  --border-color: rgba(255, 255, 255, 0.06);
  --glass-border: rgba(255, 255, 255, 0.08);
  
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.4);
  --shadow-md: 0 8px 24px rgba(0,0,0,0.5);
  --shadow-lg: 0 16px 48px rgba(0,0,0,0.6);
  --shadow-glow: 0 0 30px var(--accent-glow);
  
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* Flow 模式（心流专注） - 蓝紫渐变 */
[data-theme="flow"] {
  --bg-primary: #070710;
  --bg-secondary: rgba(12, 14, 35, 0.75);
  --bg-card: rgba(22, 24, 55, 0.65);
  --bg-hover: rgba(35, 38, 80, 0.7);
  
  --primary-color: #6c5ce7;
  --primary-hover: #a29bfe;
  --primary-gradient: linear-gradient(135deg, #6c5ce7 0%, #00cec9 100%);
  --accent-glow: rgba(108, 92, 231, 0.3);
  
  --text-secondary: #9d9db8;
  --text-muted: #4a4a6a;
}

/* Energize 模式（活力激励） - 暖色活力 */
[data-theme="energize"] {
  --bg-primary: #0d0a08;
  --bg-secondary: rgba(25, 18, 14, 0.75);
  --bg-card: rgba(45, 32, 24, 0.65);
  --bg-hover: rgba(65, 48, 36, 0.7);
  
  --primary-color: #ff4757;
  --primary-hover: #ff6b81;
  --primary-gradient: linear-gradient(135deg, #ff4757 0%, #ffa502 100%);
  --accent-glow: rgba(255, 71, 87, 0.3);
  
  --text-secondary: #b8a89d;
  --text-muted: #6a5a4a;
}

/* ===== Glassmorphism 核心 ===== */
.glass,
.navbar,
.sidebar,
.video-card,
.modal-content,
.toast,
.sidebar-ad-card {
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
}

/* ===== 导航栏升级 ===== */
.navbar {
  background: var(--bg-secondary) !important;
  border-bottom: 1px solid var(--glass-border) !important;
  box-shadow: 0 4px 30px rgba(0,0,0,0.3), inset 0 1px 0 rgba(255,255,255,0.05) !important;
  padding: 10px 24px !important;
}

.logo {
  font-size: 22px !important;
  font-weight: 800 !important;
  letter-spacing: -0.5px !important;
  background: var(--primary-gradient) !important;
  -webkit-background-clip: text !important;
  -webkit-text-fill-color: transparent !important;
  background-clip: text !important;
}

.logo-mark {
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  font-size: 26px;
}

/* 搜索框 Glassmorphism */
.search-form input {
  background: rgba(255,255,255,0.04) !important;
  border: 1px solid var(--glass-border) !important;
  border-radius: var(--radius-md) 0 0 var(--radius-md) !important;
  backdrop-filter: blur(10px);
  transition: all var(--transition-fast);
}

.search-form input:focus {
  background: rgba(255,255,255,0.08) !important;
  border-color: var(--primary-color) !important;
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.search-form button {
  background: var(--primary-gradient) !important;
  border-radius: 0 var(--radius-md) var(--radius-md) 0 !important;
  font-weight: 700;
  transition: all var(--transition-fast);
}

.search-form button:hover {
  filter: brightness(1.15);
  box-shadow: 0 4px 15px var(--accent-glow);
}

/* 按钮升级 */
.btn-login {
  border: 1.5px solid var(--glass-border) !important;
  border-radius: var(--radius-md) !important;
  background: rgba(255,255,255,0.03) !important;
  backdrop-filter: blur(10px);
  font-weight: 600;
  transition: all var(--transition-fast);
}

.btn-login:hover {
  border-color: var(--primary-color) !important;
  background: rgba(255,255,255,0.06) !important;
  box-shadow: 0 0 15px var(--accent-glow);
}

.btn-signup,
.upload-btn {
  border-radius: var(--radius-md) !important;
  background: var(--primary-gradient) !important;
  font-weight: 700 !important;
  border: none !important;
  transition: all var(--transition-fast);
}

.btn-signup:hover,
.upload-btn:hover {
  filter: brightness(1.15);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px var(--accent-glow);
}

/* ===== 侧边栏升级 ===== */
.sidebar {
  background: var(--bg-secondary) !important;
  border-right: 1px solid var(--glass-border) !important;
  box-shadow: 4px 0 30px rgba(0,0,0,0.2) !important;
  width: 260px !important;
}

.sidebar-section h3 {
  font-size: 11px !important;
  letter-spacing: 2px !important;
  font-weight: 700 !important;
  color: var(--text-muted) !important;
}

.sidebar-link {
  margin: 4px 12px !important;
  border-radius: var(--radius-md) !important;
  padding: 12px 18px !important;
  font-weight: 500;
  transition: all var(--transition-fast);
  position: relative;
  overflow: hidden;
}

.sidebar-link::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%) scaleY(0);
  width: 3px;
  height: 60%;
  background: var(--primary-gradient);
  border-radius: 0 3px 3px 0;
  transition: transform var(--transition-smooth);
}

.sidebar-link:hover::before,
.sidebar-link.active::before {
  transform: translateY(-50%) scaleY(1);
}

.sidebar-link:hover,
.sidebar-link.active {
  background: rgba(255,255,255,0.04) !important;
  color: var(--primary-color) !important;
}

/* 侧边栏广告卡片升级 */
.sidebar-ad-card {
  background: linear-gradient(135deg, rgba(102, 126, 234, 0.8) 0%, rgba(118, 75, 162, 0.8) 100%) !important;
  backdrop-filter: blur(20px) !important;
  border: 1px solid rgba(255,255,255,0.1) !important;
  border-radius: var(--radius-lg) !important;
  box-shadow: 0 8px 32px rgba(102, 126, 234, 0.3) !important;
}

/* ===== Bento Grid 布局 ===== */
.bento-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-auto-rows: 280px;
  gap: 16px;
}

.bento-grid .video-card:nth-child(1) {
  grid-column: span 2;
  grid-row: span 2;
}

.bento-grid .video-card:nth-child(6) {
  grid-column: span 2;
}

@media (max-width: 1200px) {
  .bento-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .bento-grid .video-card:nth-child(1) {
    grid-column: span 2;
    grid-row: span 1;
  }
}

@media (max-width: 768px) {
  .bento-grid {
    grid-template-columns: 1fr;
    grid-auto-rows: auto;
  }
  .bento-grid .video-card:nth-child(1),
  .bento-grid .video-card:nth-child(6) {
    grid-column: span 1;
    grid-row: span 1;
  }
}

/* ===== 视频卡片升级 ===== */
.video-grid {
  gap: 20px !important;
}

.video-card {
  background: var(--bg-card) !important;
  border-radius: var(--radius-lg) !important;
  border: 1px solid var(--glass-border) !important;
  box-shadow: var(--shadow-sm) !important;
  transition: all var(--transition-smooth) !important;
  overflow: hidden !important;
}

.video-card:hover {
  transform: translateY(-6px) scale(1.01) !important;
  box-shadow: var(--shadow-lg), var(--shadow-glow) !important;
  border-color: rgba(255,255,255,0.12) !important;
}

.video-card .video-thumbnail {
  border-radius: 0 !important;
}

.video-card .video-info {
  padding: 14px !important;
}

.video-title {
  font-size: 15px !important;
  font-weight: 700 !important;
  line-height: 1.4 !important;
  letter-spacing: -0.2px;
}

.video-meta {
  font-size: 13px !important;
  margin-top: 8px !important;
}

/* 播放按钮升级 */
.play-button {
  width: 56px !important;
  height: 56px !important;
  background: var(--primary-gradient) !important;
  box-shadow: 0 8px 24px rgba(0,0,0,0.4), 0 0 20px var(--accent-glow) !important;
  transition: all var(--transition-bounce) !important;
}

.video-card:hover .play-button {
  opacity: 1 !important;
  transform: translate(-50%, -50%) scale(1.1) !important;
}

.play-button i {
  font-size: 20px !important;
}

/* 时长标签升级 */
.video-duration {
  background: rgba(0,0,0,0.7) !important;
  backdrop-filter: blur(8px) !important;
  border-radius: var(--radius-sm) !important;
  padding: 3px 8px !important;
  font-weight: 700 !important;
  font-size: 12px !important;
  border: 1px solid rgba(255,255,255,0.08);
}

/* 质量标签升级 */
.quality-badge {
  background: var(--primary-gradient) !important;
  border-radius: var(--radius-sm) !important;
  padding: 3px 8px !important;
  font-weight: 800 !important;
  font-size: 10px !important;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.3);
}

/* ===== 模态框升级 ===== */
.modal-content {
  background: var(--bg-card) !important;
  border: 1px solid var(--glass-border) !important;
  border-radius: var(--radius-xl) !important;
  box-shadow: var(--shadow-lg), 0 0 60px rgba(0,0,0,0.5) !important;
  padding: 36px !important;
}

.modal-content h2 {
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  font-size: 26px !important;
  font-weight: 800 !important;
}

/* ===== 表单升级 ===== */
.form-group input,
.form-group textarea {
  background: rgba(255,255,255,0.03) !important;
  border: 1.5px solid var(--glass-border) !important;
  border-radius: var(--radius-md) !important;
  transition: all var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--primary-color) !important;
  box-shadow: 0 0 0 3px var(--accent-glow);
  background: rgba(255,255,255,0.05) !important;
}

.btn-primary {
  background: var(--primary-gradient) !important;
  border-radius: var(--radius-md) !important;
  font-weight: 700 !important;
  letter-spacing: 0.5px;
  transition: all var(--transition-fast);
}

.btn-primary:hover {
  filter: brightness(1.15);
  transform: translateY(-2px);
  box-shadow: 0 8px 25px var(--accent-glow);
}

/* ===== Toast 升级 ===== */
.toast {
  background: var(--bg-card) !important;
  border: 1px solid var(--glass-border) !important;
  border-left: 4px solid var(--primary-color) !important;
  border-radius: var(--radius-md) !important;
  backdrop-filter: blur(20px) !important;
  box-shadow: var(--shadow-lg) !important;
}

/* ===== 加载动画升级 ===== */
.loading-spinner i {
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  font-size: 48px !important;
}

/* ===== 骨架屏升级 ===== */
.skeleton {
  background: linear-gradient(
    90deg,
    rgba(255,255,255,0.03) 0%,
    rgba(255,255,255,0.06) 50%,
    rgba(255,255,255,0.03) 100%
  ) !important;
  background-size: 200% 100% !important;
  animation: shimmer 1.5s ease-in-out infinite !important;
  border-radius: var(--radius-md) !important;
}

@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ===== 主题切换器 ===== */
.mood-switcher {
  display: flex;
  align-items: center;
  gap: 6px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  padding: 4px;
  backdrop-filter: blur(10px);
}

.mood-btn {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  background: transparent;
  color: var(--text-secondary);
}

.mood-btn:hover {
  transform: scale(1.15);
  color: var(--text-primary);
}

.mood-btn.active {
  border-color: var(--primary-color);
  background: rgba(255,255,255,0.08);
  color: var(--primary-color);
  box-shadow: 0 0 12px var(--accent-glow);
}

.mood-btn[data-mood="night"]::before { background: linear-gradient(135deg, #333, #000); }
.mood-btn[data-mood="flow"]::before { background: linear-gradient(135deg, #6c5ce7, #00cec9); }
.mood-btn[data-mood="energize"]::before { background: linear-gradient(135deg, #ff4757, #ffa502); }

/* ===== 广告浮动窗升级 ===== */
.ad-float-content {
  background: linear-gradient(135deg, rgba(102, 126, 234, 0.85) 0%, rgba(118, 75, 162, 0.85) 100%) !important;
  backdrop-filter: blur(20px) !important;
  border: 1px solid rgba(255,255,255,0.1) !important;
  border-radius: var(--radius-xl) !important;
  box-shadow: 0 20px 60px rgba(102, 126, 234, 0.4) !important;
}

/* ===== 滚动条升级 ===== */
::-webkit-scrollbar {
  width: 6px !important;
}

::-webkit-scrollbar-track {
  background: transparent !important;
}

::-webkit-scrollbar-thumb {
  background: rgba(255,255,255,0.1) !important;
  border-radius: 10px !important;
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(255,255,255,0.2) !important;
}

/* ===== 页面背景氛围 ===== */
body::before {
  content: '';
  position: fixed;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(ellipse at 20% 20%, var(--accent-glow) 0%, transparent 50%),
              radial-gradient(ellipse at 80% 80%, rgba(255,255,255,0.02) 0%, transparent 40%);
  pointer-events: none;
  z-index: -1;
  animation: ambientPulse 8s ease-in-out infinite alternate;
}

@keyframes ambientPulse {
  0% { opacity: 0.5; transform: scale(1); }
  100% { opacity: 0.8; transform: scale(1.05); }
}

/* ===== 响应式 ===== */
@media (max-width: 768px) {
  .navbar {
    padding: 8px 16px !important;
  }
  
  .mood-switcher {
    display: none;
  }
  
  .sidebar {
    width: 280px !important;
  }
  
  .video-grid {
    gap: 12px !important;
  }
}