/* ============================================
   AItab 新标签页 - 主样式表 (Go+SQLite)
   ============================================ */

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

:root {
    --bg-overlay: rgba(0, 0, 0, 0.25);
    --card-bg: rgba(255, 255, 255, 0.12);
    --card-bg-hover: rgba(255, 255, 255, 0.22);
    --card-bg-solid: rgba(255, 255, 255, 0.18);
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.85);
    --text-muted: rgba(255, 255, 255, 0.55);
    --border-light: rgba(255, 255, 255, 0.15);
    --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.12);
    --shadow-hover: 0 12px 40px rgba(0, 0, 0, 0.25);
    --blur-amount: 20px;
    --radius-sm: 8px; --radius-md: 12px; --radius-lg: 16px; --radius-xl: 24px;
    --transition-fast: 0.15s ease; --transition-normal: 0.25s ease;
    --font-system: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}

html, body { width: 100%; min-height: 100%; font-family: var(--font-system); color: var(--text-primary); -webkit-font-smoothing: antialiased; }

/* Background */
.bg-layer { position: fixed; inset: 0; z-index: -2; background-color: #1a1a2e; }
.bg-layer .bg-image { width: 100%; height: 100%; object-fit: cover; transition: opacity 1s ease; }
.bg-layer .bg-overlay { position: absolute; inset: 0; background: linear-gradient(180deg, rgba(0,0,0,0.1) 0%, rgba(0,0,0,0.25) 40%, rgba(0,0,0,0.5) 100%); }
.bg-gradient-bottom { position: fixed; bottom: 0; left: 0; right: 0; height: 55%; z-index: -1; background: linear-gradient(to top, rgba(0,0,0,0.7) 0%, rgba(0,0,0,0.35) 50%, transparent 100%); pointer-events: none; }

/* Main Container */
.main-container { display: flex; flex-direction: column; min-height: 100vh; padding: 0 60px; position: relative; z-index: 1; }

/* Top Bar */
.top-bar { display: flex; justify-content: flex-end; align-items: center; padding: 16px 0; gap: 16px; }
.top-bar-item { display: flex; align-items: center; gap: 6px; padding: 6px 14px; background: var(--card-bg); backdrop-filter: blur(var(--blur-amount)); -webkit-backdrop-filter: blur(var(--blur-amount)); border-radius: 20px; font-size: 13px; color: var(--text-secondary); cursor: pointer; transition: all var(--transition-fast); border: 1px solid var(--border-light); }
.top-bar-item:hover { background: var(--card-bg-hover); color: var(--text-primary); }
.top-bar-item .icon { font-size: 15px; }

/* Weather */
.weather-widget { display: flex; align-items: center; gap: 8px; padding: 6px 16px; background: var(--card-bg); backdrop-filter: blur(var(--blur-amount)); -webkit-backdrop-filter: blur(var(--blur-amount)); border-radius: 20px; font-size: 13px; border: 1px solid var(--border-light); cursor: pointer; transition: all var(--transition-fast); }
.weather-widget:hover { background: var(--card-bg-hover); }
.weather-widget .weather-icon { font-size: 22px; }
.weather-widget .weather-info { display: flex; flex-direction: column; line-height: 1.2; }
.weather-widget .weather-temp { font-size: 15px; font-weight: 600; }
.weather-widget .weather-desc { font-size: 11px; color: var(--text-muted); }

/* Center Content */
.center-content { display: flex; flex-direction: column; align-items: center; padding-top: 6vh; padding-bottom: 20px; }
.clock-section { text-align: center; margin-bottom: 10px; }
.clock-time { font-size: 96px; font-weight: 200; letter-spacing: -3px; line-height: 1; text-shadow: 0 4px 20px rgba(0,0,0,0.3); cursor: default; user-select: none; }
.clock-date { font-size: 18px; font-weight: 400; color: var(--text-secondary); margin-top: 6px; letter-spacing: 1px; text-shadow: 0 2px 8px rgba(0,0,0,0.3); }
.clock-date .lunar { margin-left: 12px; font-size: 15px; color: var(--text-muted); }

/* Search */
.search-section { width: 100%; max-width: 680px; margin-top: 24px; }
.search-box { display: flex; align-items: center; background: var(--card-bg-solid); backdrop-filter: blur(var(--blur-amount)); -webkit-backdrop-filter: blur(var(--blur-amount)); border: 1.5px solid var(--border-light); border-radius: 28px; padding: 6px 8px 6px 22px; transition: all var(--transition-normal); box-shadow: var(--shadow-card); }
.search-box:focus-within { border-color: rgba(255,255,255,0.4); background: rgba(255,255,255,0.25); box-shadow: var(--shadow-hover); }
.search-input { flex: 1; background: none; border: none; outline: none; color: #fff; font-size: 16px; padding: 8px 0; font-family: var(--font-system); }
.search-input::placeholder { color: rgba(255,255,255,0.45); }
.search-btn { display: flex; align-items: center; justify-content: center; width: 42px; height: 42px; background: rgba(255,255,255,0.2); border: none; border-radius: 50%; cursor: pointer; color: #fff; transition: all var(--transition-fast); flex-shrink: 0; }
.search-btn:hover { background: rgba(255,255,255,0.35); transform: scale(1.05); }

/* Engine Switcher - tabs style above search */
.engine-switcher { display: flex; justify-content: center; gap: 4px; margin-bottom: 14px; background: var(--card-bg); backdrop-filter: blur(var(--blur-amount)); -webkit-backdrop-filter: blur(var(--blur-amount)); border-radius: 24px; padding: 4px; border: 1px solid var(--border-light); }
.engine-tag { display: flex; align-items: center; gap: 6px; padding: 8px 18px; border-radius: 20px; cursor: pointer; font-size: 13px; color: var(--text-muted); transition: all var(--transition-fast); border: none; background: transparent; white-space: nowrap; }
.engine-tag:hover { color: var(--text-secondary); }
.engine-tag.active { color: var(--text-primary); background: rgba(255,255,255,0.22); box-shadow: 0 1px 4px rgba(0,0,0,0.15); font-weight: 500; }
.engine-tag img { width: 16px; height: 16px; border-radius: 2px; }

/* Shortcuts - Card Grid Layout */
.shortcuts-section { width: 100%; max-width: 960px; padding: 24px 0; margin-top: 10px; }
.shortcuts-wrapper { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.shortcut-category { background: var(--card-bg); backdrop-filter: blur(var(--blur-amount)); -webkit-backdrop-filter: blur(var(--blur-amount)); border: 1px solid var(--border-light); border-radius: var(--radius-lg); padding: 18px 20px; transition: all var(--transition-normal); }
.shortcut-category:hover { background: var(--card-bg-hover); box-shadow: var(--shadow-hover); }
.shortcut-cat-label { display: flex; align-items: center; gap: 8px; font-size: 14px; font-weight: 600; color: var(--text-primary); margin-bottom: 12px; padding-bottom: 10px; border-bottom: 1px solid var(--border-light); }
.shortcut-cat-label .cat-icon { font-size: 18px; }
.shortcut-cat-links { display: flex; flex-wrap: wrap; gap: 6px; }
.shortcut-item { display: flex; align-items: center; gap: 8px; padding: 6px 10px; background: rgba(255,255,255,0.06); border-radius: 8px; cursor: pointer; transition: all var(--transition-fast); text-decoration: none; color: var(--text-secondary); font-size: 13px; white-space: nowrap; }
.shortcut-item:hover { background: rgba(255,255,255,0.15); color: var(--text-primary); transform: translateX(2px); }
.shortcut-item .shortcut-icon { width: 18px; height: 18px; border-radius: 4px; object-fit: contain; flex-shrink: 0; }
.shortcut-item .shortcut-icon-fallback { width: 18px; height: 18px; border-radius: 4px; background: rgba(255,255,255,0.15); display: flex; align-items: center; justify-content: center; font-size: 10px; flex-shrink: 0; }
.shortcut-item .shortcut-title { overflow: hidden; text-overflow: ellipsis; }

/* News */
.news-section { width: 100%; padding: 20px 0 30px 0; }
.news-header { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; }
.news-title { font-size: 14px; font-weight: 600; color: var(--text-secondary); }
.news-more { font-size: 12px; color: var(--text-muted); cursor: pointer; text-decoration: none; transition: color var(--transition-fast); }
.news-more:hover { color: var(--text-primary); }
.news-list { display: flex; gap: 12px; overflow-x: auto; padding-bottom: 8px; scrollbar-width: thin; scrollbar-color: rgba(255,255,255,0.2) transparent; }
.news-list::-webkit-scrollbar { height: 4px; }
.news-list::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.2); border-radius: 4px; }
.news-card { flex-shrink: 0; width: 280px; padding: 14px; background: var(--card-bg); backdrop-filter: blur(var(--blur-amount)); -webkit-backdrop-filter: blur(var(--blur-amount)); border-radius: var(--radius-md); cursor: pointer; transition: all var(--transition-fast); border: 1px solid var(--border-light); text-decoration: none; color: var(--text-primary); }
.news-card:hover { background: var(--card-bg-hover); transform: translateY(-2px); box-shadow: var(--shadow-hover); }
.news-card .news-source { font-size: 11px; color: var(--text-muted); margin-bottom: 6px; }
.news-card .news-card-title { font-size: 13px; line-height: 1.5; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }

/* Settings Dialog */
.settings-overlay { position: fixed; inset: 0; background: rgba(0,0,0,0.5); z-index: 101; display: flex; align-items: center; justify-content: center; opacity: 0; pointer-events: none; transition: opacity var(--transition-normal); }
.settings-overlay.show { opacity: 1; pointer-events: auto; }
.settings-dialog { width: 420px; background: #1e1e2e; border-radius: var(--radius-lg); overflow: hidden; box-shadow: 0 20px 60px rgba(0,0,0,0.5); border: 1px solid rgba(255,255,255,0.1); }
.settings-body { padding: 20px; display: flex; flex-direction: column; gap: 16px; }
.setting-row { display: flex; align-items: center; justify-content: space-between; }
.setting-label { font-size: 14px; color: var(--text-secondary); }
.setting-select, .setting-input { background: rgba(255,255,255,0.08); border: 1px solid rgba(255,255,255,0.12); border-radius: 8px; padding: 8px 12px; color: #fff; font-size: 13px; outline: none; font-family: var(--font-system); min-width: 180px; }
.setting-select:focus, .setting-input:focus { border-color: rgba(255,255,255,0.3); }
.setting-select option { background: #1e1e2e; color: #fff; }
.toggle-switch { position: relative; display: inline-block; width: 44px; height: 24px; }
.toggle-switch input { opacity: 0; width: 0; height: 0; }
.toggle-slider { position: absolute; inset: 0; background: rgba(255,255,255,0.2); border-radius: 24px; cursor: pointer; transition: all var(--transition-fast); }
.toggle-slider::before { content: ''; position: absolute; left: 3px; top: 3px; width: 18px; height: 18px; background: #fff; border-radius: 50%; transition: all var(--transition-fast); }
.toggle-switch input:checked + .toggle-slider { background: linear-gradient(135deg, #667eea, #764ba2); }
.toggle-switch input:checked + .toggle-slider::before { transform: translateX(20px); }
.settings-footer { padding: 16px 20px; border-top: 1px solid rgba(255,255,255,0.1); display: flex; justify-content: flex-end; gap: 10px; }
.setting-btn { padding: 8px 20px; border-radius: 8px; font-size: 13px; cursor: pointer; transition: all var(--transition-fast); border: 1px solid rgba(255,255,255,0.15); background: transparent; color: var(--text-secondary); }
.setting-btn:hover { background: rgba(255,255,255,0.1); color: var(--text-primary); }
.setting-btn.primary { background: linear-gradient(135deg, #667eea, #764ba2); border-color: transparent; color: #fff; }
.setting-btn.primary:hover { opacity: 0.9; }

/* AI Assistant */
.ai-assistant { position: fixed; right: 30px; bottom: 100px; width: 56px; height: 56px; border-radius: 50%; background: linear-gradient(135deg, #667eea, #764ba2); display: flex; align-items: center; justify-content: center; font-size: 24px; cursor: pointer; box-shadow: 0 6px 24px rgba(102,126,234,0.4); transition: all var(--transition-normal); border: none; color: #fff; z-index: 10; }
.ai-assistant:hover { transform: scale(1.1); box-shadow: 0 8px 32px rgba(102,126,234,0.6); }
.ai-dialog-overlay { position: fixed; inset: 0; background: rgba(0,0,0,0.5); z-index: 100; display: flex; align-items: center; justify-content: center; opacity: 0; pointer-events: none; transition: opacity var(--transition-normal); }
.ai-dialog-overlay.show { opacity: 1; pointer-events: auto; }
.ai-dialog { width: 480px; max-height: 600px; background: #1e1e2e; border-radius: var(--radius-lg); display: flex; flex-direction: column; overflow: hidden; box-shadow: 0 20px 60px rgba(0,0,0,0.5); border: 1px solid rgba(255,255,255,0.1); }
.ai-dialog-header { display: flex; justify-content: space-between; align-items: center; padding: 16px 20px; border-bottom: 1px solid rgba(255,255,255,0.1); }
.ai-dialog-header h3 { font-size: 16px; font-weight: 600; }
.ai-dialog-close { background: none; border: none; color: var(--text-muted); font-size: 20px; cursor: pointer; padding: 4px; transition: color var(--transition-fast); }
.ai-dialog-close:hover { color: var(--text-primary); }
.ai-dialog-messages { flex: 1; padding: 16px 20px; overflow-y: auto; display: flex; flex-direction: column; gap: 12px; min-height: 300px; max-height: 400px; }
.ai-message { display: flex; gap: 8px; font-size: 13px; line-height: 1.6; }
.ai-message.user { flex-direction: row-reverse; }
.ai-message .ai-avatar { width: 32px; height: 32px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 16px; flex-shrink: 0; }
.ai-message.assistant .ai-avatar { background: linear-gradient(135deg, #667eea, #764ba2); }
.ai-message.user .ai-avatar { background: rgba(255,255,255,0.2); }
.ai-message .ai-bubble { padding: 10px 14px; border-radius: 14px; max-width: 75%; word-wrap: break-word; }
.ai-message.assistant .ai-bubble { background: rgba(255,255,255,0.08); border-radius: 4px 14px 14px 14px; }
.ai-message.user .ai-bubble { background: linear-gradient(135deg, #667eea, #764ba2); border-radius: 14px 4px 14px 14px; }
.ai-dialog-input { display: flex; gap: 8px; padding: 12px 20px; border-top: 1px solid rgba(255,255,255,0.1); }
.ai-dialog-input input { flex: 1; background: rgba(255,255,255,0.06); border: 1px solid rgba(255,255,255,0.1); border-radius: 20px; padding: 10px 16px; color: #fff; font-size: 13px; outline: none; font-family: var(--font-system); }
.ai-dialog-input input:focus { border-color: rgba(255,255,255,0.25); }
.ai-dialog-input button { background: linear-gradient(135deg, #667eea, #764ba2); border: none; color: #fff; padding: 10px 20px; border-radius: 20px; cursor: pointer; font-size: 13px; transition: opacity var(--transition-fast); }
.ai-dialog-input button:hover { opacity: 0.9; }

/* Responsive */
@media (max-width: 900px) {
    .shortcuts-wrapper { grid-template-columns: repeat(2, 1fr); }
    .shortcuts-section { max-width: 100%; }
}
@media (max-width: 768px) {
    .main-container { padding: 0 20px; }
    .clock-time { font-size: 56px; }
    .clock-date { font-size: 14px; }
    .search-section { max-width: 100%; }
    .shortcuts-wrapper { grid-template-columns: 1fr; }
    .shortcut-item { font-size: 12px; }
    .engine-switcher { gap: 2px; padding: 3px; }
    .engine-tag { padding: 6px 12px; font-size: 12px; }
    .news-card { width: 240px; }
    .ai-dialog { width: 95vw; }
}

/* Animations */
@keyframes fadeInUp { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }
.animate-in { animation: fadeInUp 0.5s ease forwards; }
.stagger-1 { animation-delay: 0.05s; } .stagger-2 { animation-delay: 0.1s; } .stagger-3 { animation-delay: 0.15s; } .stagger-4 { animation-delay: 0.2s; } .stagger-5 { animation-delay: 0.25s; }