/* 基础样式 */
:root {
    /* 主色调 */
    --primary-color: #4CAF50;
    --primary-light: #81C784;
    --primary-dark: #388E3C;
    
    /* 辅助色 */
    --background-color: #F5F5F5;
    --card-background: #FFFFFF;
    --text-color: #333333;
    --text-secondary: #757575;
    
    /* 强调色 */
    --study-color: #2196F3;
    --search-color: #FF9800;
    --ai-color: #9C27B0;
    --wallpaper-color: #E91E63;
    --local-color: #607D8B;
    
    /* 其他 */
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    --border-radius: 12px;
    --transition: all 0.3s ease;
}

/* 深色模式 */
[data-theme="dark"] {
    --background-color: #121212;
    --card-background: #1E1E1E;
    --text-color: #E0E0E0;
    --text-secondary: #AAAAAA;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

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

body {
    font-family: 'Roboto', 'Microsoft YaHei', sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    transition: var(--transition);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background-image: linear-gradient(to bottom right, rgba(255, 255, 255, 0.1), rgba(0, 0, 0, 0.1));
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* 顶部区域样式 */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    padding: 15px 0;
}

.time-display {
    font-size: 2.5rem;
    font-weight: 300;
    color: var(--text-color);
    background-color: rgba(0, 0, 0, 0.1);
    padding: 10px 20px;
    border-radius: var(--border-radius);
    backdrop-filter: blur(5px);
}

.search-container {
    flex-grow: 1;
    max-width: 600px;
    margin: 0 20px;
    position: relative;
    display: flex;
}

#search-input {
    width: 100%;
    padding: 12px 20px;
    border: none;
    border-radius: var(--border-radius);
    background-color: var(--card-background);
    color: var(--text-color);
    font-size: 1rem;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

#search-input:focus {
    outline: none;
    box-shadow: 0 0 0 2px var(--primary-color);
}

#search-button {
    position: absolute;
    right: 10px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--primary-color);
    font-size: 1.2rem;
    cursor: pointer;
}

.header-buttons button {
    background-color: var(--card-background);
    border: none;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    margin-left: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: var(--shadow);
    color: var(--text-color);
    transition: var(--transition);
}

.header-buttons button:hover {
    background-color: var(--primary-light);
    color: white;
}

/* 中央区域样式 */
main {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.category-section {
    margin-bottom: 20px;
}

.category-title {
    font-size: 1.2rem;
    margin-bottom: 15px;
    color: var(--text-color);
    font-weight: 500;
    padding-left: 10px;
    border-left: 4px solid var(--primary-color);
}

#study .category-title {
    border-left-color: var(--study-color);
}

#search .category-title {
    border-left-color: var(--search-color);
}

#ai .category-title {
    border-left-color: var(--ai-color);
}

#wallpaper .category-title {
    border-left-color: var(--wallpaper-color);
}

#local-test .category-title {
    border-left-color: var(--local-color);
}

.card-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 20px;
}

.category-card {
    background-color: var(--card-background);
    border-radius: var(--border-radius);
    padding: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow);
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
    height: 120px;
}

.category-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

#study .category-card:hover {
    box-shadow: 0 5px 15px rgba(33, 150, 243, 0.3);
}

#search .category-card:hover {
    box-shadow: 0 5px 15px rgba(255, 152, 0, 0.3);
}

#ai .category-card:hover {
    box-shadow: 0 5px 15px rgba(156, 39, 176, 0.3);
}

#wallpaper .category-card:hover {
    box-shadow: 0 5px 15px rgba(233, 30, 99, 0.3);
}

#local-test .category-card:hover {
    box-shadow: 0 5px 15px rgba(96, 125, 139, 0.3);
}

.card-icon {
    font-size: 2rem;
    margin-bottom: 10px;
}

#study .card-icon {
    color: var(--study-color);
}

#search .card-icon {
    color: var(--search-color);
}

#ai .card-icon {
    color: var(--ai-color);
}

#wallpaper .card-icon {
    color: var(--wallpaper-color);
}

#local-test .card-icon {
    color: var(--local-color);
}

.card-title {
    font-size: 0.9rem;
    color: var(--text-color);
}

/* 底部区域样式 */
footer {
    margin-top: 30px;
    text-align: center;
    padding: 20px 0;
    position: relative;
}

.quote {
    font-size: 1rem;
    color: var(--text-secondary);
    font-style: italic;
}

.add-button {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: var(--primary-color);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    box-shadow: var(--shadow);
    cursor: pointer;
    transition: var(--transition);
}

.add-button:hover {
    transform: rotate(90deg);
    background-color: var(--primary-dark);
}

/* 设置面板样式 */
.settings-panel, .links-panel {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.9);
    background-color: var(--card-background);
    border-radius: var(--border-radius);
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.2);
    width: 90%;
    max-width: 500px;
    max-height: 80vh;
    overflow-y: auto;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.settings-panel.active, .links-panel.active {
    opacity: 1;
    visibility: visible;
    transform: translate(-50%, -50%) scale(1);
}

.settings-header, .links-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

.settings-header h3, .links-header h3 {
    font-weight: 500;
    color: var(--text-color);
}

.settings-header button, .links-header button {
    background: none;
    border: none;
    font-size: 1.2rem;
    color: var(--text-color);
    cursor: pointer;
}

.settings-content, .links-content {
    padding: 20px;
}

.settings-section {
    margin-bottom: 20px;
}

.settings-section h4 {
    margin-bottom: 10px;
    color: var(--text-color);
}

.theme-options, .background-options {
    display: flex;
    gap: 10px;
    margin-bottom: 15px;
}

.theme-option, .bg-option {
    padding: 8px 15px;
    border: 1px solid var(--primary-color);
    border-radius: 20px;
    background: none;
    color: var(--text-color);
    cursor: pointer;
    transition: var(--transition);
}

.theme-option.active, .bg-option.active {
    background-color: var(--primary-color);
    color: white;
}

#upload-bg {
    padding: 8px 15px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 20px;
    cursor: pointer;
    margin-top: 10px;
}

#default-search-engine {
    width: 100%;
    padding: 8px;
    border-radius: 5px;
    border: 1px solid #ddd;
    background-color: var(--card-background);
    color: var(--text-color);
}

.links-content {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 15px;
}

.link-item {
    display: flex;
    align-items: center;
    padding: 10px;
    border-radius: var(--border-radius);
    background-color: rgba(0, 0, 0, 0.05);
    transition: var(--transition);
}

.link-item:hover {
    background-color: rgba(0, 0, 0, 0.1);
}

.link-icon {
    width: 16px;
    height: 16px;
    margin-right: 10px;
}

.link-title {
    font-size: 0.9rem;
    color: var(--text-color);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.overlay.active {
    opacity: 1;
    visibility: visible;
}

/* 响应式设计 */
@media (max-width: 768px) {
    header {
        flex-direction: column;
        align-items: center;
    }
    
    .time-display {
        margin-bottom: 15px;
        font-size: 2rem;
    }
    
    .search-container {
        width: 100%;
        margin: 15px 0;
    }
    
    .header-buttons {
        margin-top: 15px;
    }
    
    .card-container {
        grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    }
    
    .category-card {
        height: 100px;
        padding: 15px;
    }
    
    .card-icon {
        font-size: 1.5rem;
    }
    
    .card-title {
        font-size: 0.8rem;
    }
}

@media (max-width: 480px) {
    .time-display {
        font-size: 1.8rem;
    }
    
    .card-container {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .links-content {
        grid-template-columns: 1fr;
    }
}