/* ============================================================
   theme.css — TakealotGPT 全局主题变量
   深色 / 浅色 / 自动（跟随系统）
   所有页面统一引入此文件
   ============================================================ */

/* ===== Dark Theme (Default) ===== */
:root,
[data-theme="dark"] {
  --bg-primary:    #0F0F23;
  --bg-secondary:  #1A1A2E;
  --bg-surface:    #252542;
  --bg-elevated:   #2D2D4A;
  --text-primary:   #FFFFFF;
  --text-secondary: #A0A0C0;
  --text-muted:     #6B6B8D;
  --brand:    #6366F1;
  --brand-2:  #8B5CF6;
  --accent:   #3B82F6;
  --gradient: linear-gradient(135deg, #6366F1 0%, #8B5CF6 100%);
  --gradient2: linear-gradient(135deg, #3B82F6 0%, #6366F1 100%);
  --success: #10B981;
  --warning: #F59E0B;
  --error:   #EF4444;
  --border:   rgba(61,61,92,0.5);
  --divider:  #2D2D4A;
  --shadow-card: 0 8px 24px rgba(0,0,0,0.4);
  --glow: 0 0 30px rgba(99,102,241,0.25);
  --header-bg: rgba(15,15,35,0.92);
  --nav-hover: rgba(99,102,241,0.08);
  --nav-active: rgba(99,102,241,0.14);
  --badge-bg: rgba(99,102,241,0.25);
  --badge-color: #8B5CF6;
  --scrollbar-thumb: #2D2D4A;
  --toggle-bg: #2D2D4A;
  --toggle-dot: #A0A0C0;
  --theme-icon-dark-bg: rgba(99,102,241,0.15);
  --theme-icon-light-bg: rgba(245,158,11,0.12);
  --theme-icon-auto-bg: rgba(59,130,246,0.12);
  --transition: 220ms cubic-bezier(0.4,0,0.2,1);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;
  --sidebar-w: 240px;
  --header-h: 64px;
  --nav-h: 72px;
  --shadow-lg: 0 16px 48px rgba(0,0,0,0.5);
  --transition-fast: 150ms cubic-bezier(0.4,0,0.2,1);
  --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

/* ===== Light Theme ===== */
[data-theme="light"] {
  --bg-primary:    #F3F4F8;
  --bg-secondary:  #FFFFFF;
  --bg-surface:    #F0F1F5;
  --bg-elevated:   #E5E7EB;
  --text-primary:   #1A1A2E;
  --text-secondary: #5B5B7A;
  --text-muted:     #8B8BA8;
  --border:   rgba(0,0,0,0.08);
  --divider:  #E5E7EB;
  --shadow-card: 0 4px 16px rgba(0,0,0,0.06);
  --glow: 0 0 20px rgba(99,102,241,0.15);
  --header-bg: rgba(243,244,248,0.92);
  --nav-hover: rgba(99,102,241,0.06);
  --nav-active: rgba(99,102,241,0.10);
  --badge-bg: rgba(99,102,241,0.12);
  --badge-color: #6366F1;
  --scrollbar-thumb: #CBD5E1;
  --toggle-bg: #CBD5E1;
  --toggle-dot: #8B8BA8;
  --theme-icon-dark-bg: rgba(99,102,241,0.10);
  --theme-icon-light-bg: rgba(245,158,11,0.10);
  --theme-icon-auto-bg: rgba(59,130,246,0.10);
}

/* ===== Global Transition ===== */
html { transition: color var(--transition), background var(--transition); }
body { transition: background var(--transition), color var(--transition); }
.header, .nav, .sidebar { transition: background var(--transition), border-color var(--transition), color var(--transition); }

/* ===== SVG Icons Fix ===== */
svg { display: inline-block; vertical-align: middle; }
.nav-item svg {
  width: 20px !important;
  height: 20px !important;
  min-width: 20px !important;
  min-height: 20px !important;
  flex-shrink: 0;
  stroke: currentColor;
  display: block !important;
  visibility: visible !important;
  opacity: 1 !important;
}

/* ===== Scrollbar ===== */
::-webkit-scrollbar { width: 4px; height: 4px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--scrollbar-thumb); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--brand); }

/* ========================================
   Plan Months Selector - 套餐月份选择器
   ==================================== */

.plan-months {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 16px;
  margin-bottom: 16px;
  transition: all 0.3s ease;
}

.plan-months:hover {
  border-color: var(--brand);
  box-shadow: 0 0 20px rgba(99, 102, 241, 0.1);
}

.months-label {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.months-label::before {
  content: '';
  width: 4px;
  height: 14px;
  background: var(--gradient);
  border-radius: 2px;
}

.months-selector {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  margin-bottom: 12px;
}

.month-btn {
  padding: 12px 8px;
  font-size: 14px;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: 2px solid var(--border);
  background: var(--bg-secondary);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.25s ease;
  position: relative;
  overflow: hidden;
}

.month-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(99, 102, 241, 0.1), transparent);
  transition: left 0.5s ease;
}

.month-btn:hover::before {
  left: 100%;
}

.month-btn:hover {
  border-color: var(--brand);
  color: var(--brand);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.2);
}

.month-btn.active {
  background: var(--gradient);
  border-color: transparent;
  color: #fff;
  box-shadow: 0 6px 20px rgba(99, 102, 241, 0.4);
  transform: translateY(-2px);
}

.months-summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 12px;
  border-top: 1px solid var(--divider);
  font-size: 13px;
}

.months-summary .days {
  color: var(--text-secondary);
}

.months-summary .credits {
  color: var(--success);
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 4px;
}

.months-summary .credits::before {
  content: '';
  width: 8px;
  height: 8px;
  background: var(--success);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(0.8); }
}

/* ===== Hide User Plan Info ===== */
.user-plan { display: none !important; }

/* ===== Smooth User Info Update ===== */
.user-name, .user-avatar {
  transition: none !important;
}