/* 主题变量定义 */
:root {
    /* 明亮主题变量 */
    --bg-primary: #f0f4f8;
    --bg-secondary: #ffffff;
    --text-primary: #1a202c;
    --text-secondary: #4a5568;
    --accent-primary: #3182ce;
    --accent-secondary: #63b3ed;
    --border-color: #e2e8f0;
    --glow-color: rgba(49, 130, 206, 0.3);
    --shadow-color: rgba(0, 0, 0, 0.1);
    
    /* 动画过渡时间 */
    --transition-time: 0.5s;
}

/* 暗色主题变量 */
.dark-theme {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --accent-primary: #60a5fa;
    --accent-secondary: #93c5fd;
    --border-color: #334155;
    --glow-color: rgba(96, 165, 250, 0.4);
    --shadow-color: rgba(0, 0, 0, 0.3);
}

/* 全局样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    transition: background-color var(--transition-time) ease, color var(--transition-time) ease;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* 容器样式 */
.container {
    width: 100%;
    max-width: 800px;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2rem;
}

/* 右上角按钮组 */
.header-buttons {
    position: absolute;
    top: 2rem;
    right: 2rem;
    display: flex;
    gap: 1rem;
    align-items: center;
}

/* 主题切换按钮 */
.theme-toggle {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 50%;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-time) ease;
    box-shadow: 0 4px 6px var(--shadow-color);
}

/* 设置按钮 */
.settings-button {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 50%;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 1.2rem;
    transition: all var(--transition-time) ease;
    box-shadow: 0 4px 6px var(--shadow-color);
}

.settings-button:hover {
    transform: scale(1.05);
    box-shadow: 0 6px 12px var(--shadow-color), 0 0 15px var(--glow-color);
}

/* 设置菜单 */
.settings-container {
    position: relative;
}

.settings-menu {
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: 1rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
    width: 300px;
    box-shadow: 0 8px 16px var(--shadow-color);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-time) ease;
    z-index: 1000;
}

.settings-menu.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.settings-menu h3 {
    color: var(--text-primary);
    margin-bottom: 1rem;
    font-size: 1.2rem;
    text-align: center;
}

.settings-section {
    margin-bottom: 1.5rem;
}

.settings-section h4 {
    color: var(--text-secondary);
    margin-bottom: 0.8rem;
    font-size: 1rem;
}



/* 设置菜单列表 */
.settings-list {
    list-style: none;
}

.settings-item {
    padding: 0.8rem;
    border-bottom: 1px solid var(--border-color);
    cursor: pointer;
    transition: background-color var(--transition-time) ease;
    border-radius: 4px;
    margin-bottom: 0.3rem;
}

.settings-item:hover {
    background-color: var(--accent-primary);
    color: white;
}

.settings-item:last-child {
    border-bottom: none;
    margin-bottom: 0;
}

/* 搜索设置弹窗 */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-time) ease;
}

.modal.show {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    box-shadow: 0 10px 25px var(--shadow-color);
    width: 100%;
    max-width: 600px;
    max-height: 80vh;
    overflow-y: auto;
    transform: translateY(-20px);
    transition: transform var(--transition-time) ease;
}

.modal.show .modal-content {
    transform: translateY(0);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
    color: var(--text-primary);
    margin: 0;
    font-size: 1.2rem;
}

.close-button {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-secondary);
    cursor: pointer;
    transition: color var(--transition-time) ease;
}

.close-button:hover {
    color: var(--text-primary);
}

.modal-body {
    padding: 1.5rem;
}

.setting-group {
    margin-bottom: 1.5rem;
}

.setting-group label {
    display: block;
    margin-bottom: 0.8rem;
    color: var(--text-primary);
    font-size: 1rem;
}

.radio-group {
    display: flex;
    gap: 2rem;
    margin-top: 0.5rem;
}

.radio-option {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    color: var(--text-primary);
}

.radio-option input[type="radio"] {
    accent-color: var(--accent-primary);
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 1rem;
    padding: 1.5rem;
    border-top: 1px solid var(--border-color);
    background: var(--bg-primary);
}

.default-button {
    padding: 0.8rem 1.5rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    cursor: pointer;
    transition: all var(--transition-time) ease;
    font-size: 0.9rem;
}

.default-button:hover {
    background: var(--accent-secondary);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px var(--shadow-color);
}

.save-button {
    padding: 0.8rem 1.5rem;
    background: var(--accent-primary);
    border: none;
    border-radius: 8px;
    color: white;
    cursor: pointer;
    transition: all var(--transition-time) ease;
    font-size: 0.9rem;
}

.save-button:hover {
    background: var(--accent-secondary);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px var(--shadow-color);
}

/* 响应式调整 */
@media (max-width: 768px) {
    .modal-content {
        margin: 1rem;
        max-width: calc(100% - 2rem);
    }
    
    .radio-group {
        flex-direction: column;
        gap: 0.8rem;
    }
}

.theme-toggle:hover {
    transform: scale(1.05);
    box-shadow: 0 6px 12px var(--shadow-color), 0 0 15px var(--glow-color);
}

.theme-icon {
    font-size: 1.2rem;
    transition: opacity var(--transition-time) ease, transform var(--transition-time) ease;
}

.sun {
    opacity: 1;
}

.moon {
    opacity: 0;
    position: absolute;
}

.dark-theme .sun {
    opacity: 0;
}

.dark-theme .moon {
    opacity: 1;
}

/* 标题样式 */
.header {
    text-align: center;
    margin-bottom: 1rem;
}

.title {
    font-size: 3.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
    animation: glow 2s ease-in-out infinite alternate;
}

.white-text {
    color: white !important;
    -webkit-text-fill-color: white !important;
    background: none !important;
    -webkit-background-clip: unset !important;
    background-clip: unset !important;
}

.subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
    transition: color var(--transition-time) ease;
}

/* 搜索容器样式 */
.search-container {
    width: 100%;
    max-width: 600px;
}

.search-form {
    width: 100%;
}

.search-box {
    position: relative;
    width: 100%;
    border-radius: 50px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    transition: all var(--transition-time) ease;
    box-shadow: 0 4px 6px var(--shadow-color);
    overflow: hidden;
}

.search-box:focus-within {
    box-shadow: 0 6px 12px var(--shadow-color), 0 0 20px var(--glow-color);
    transform: translateY(-2px);
}

.search-input {
    width: 100%;
    padding: 1.2rem 5rem 1.2rem 2rem;
    border: none;
    background: transparent;
    color: var(--text-primary);
    font-size: 1.1rem;
    outline: none;
    transition: color var(--transition-time) ease;
}

.search-input::placeholder {
    color: var(--text-secondary);
    transition: color var(--transition-time) ease;
}

.search-button {
    position: absolute;
    right: 0;
    top: 0;
    height: 100%;
    padding: 0 2rem;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    border: none;
    color: white;
    font-size: 1.2rem;
    cursor: pointer;
    transition: all var(--transition-time) ease;
}

.search-button:hover {
    background: linear-gradient(135deg, var(--accent-secondary), var(--accent-primary));
    transform: scale(1.05);
}

/* 搜索建议样式 */
.search-suggestions {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 0 0 25px 25px;
    margin-top: 0.5rem;
    box-shadow: 0 8px 16px var(--shadow-color);
    max-height: 300px;
    overflow-y: auto;
    z-index: 100;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-time) ease;
}

.search-suggestions.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.search-suggestion-item {
    padding: 1rem 2rem;
    cursor: pointer;
    transition: background-color var(--transition-time) ease;
    border-bottom: 1px solid var(--border-color);
}

.search-suggestion-item:hover {
    background-color: var(--accent-primary);
    color: white;
}

.search-suggestion-item:last-child {
    border-bottom: none;
    border-radius: 0 0 24px 24px;
}

/* 页脚样式 */
.footer {
    margin-top: 2rem;
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
    transition: color var(--transition-time) ease;
}

.footer a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color var(--transition-time) ease;
}

.footer a:hover {
    color: var(--accent-primary);
    text-decoration: underline;
}

/* 动画效果 */
@keyframes glow {
    from {
        filter: drop-shadow(0 0 5px var(--accent-primary));
    }
    to {
        filter: drop-shadow(0 0 15px var(--accent-primary));
    }
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        padding: 1.5rem;
    }
    
    .title {
        font-size: 2.5rem;
    }
    
    .subtitle {
        font-size: 1rem;
    }
    
    .search-input {
        font-size: 1rem;
        padding: 1rem 4rem 1rem 1.5rem;
    }
    
    .search-button {
        padding: 0 1.5rem;
    }
    
    .theme-toggle {
        top: 1.5rem;
        right: 1.5rem;
        width: 45px;
        height: 45px;
    }
}

@media (max-width: 480px) {
    .title {
        font-size: 2rem;
    }
    
    .search-input {
        font-size: 0.9rem;
        padding: 0.8rem 3.5rem 0.8rem 1.2rem;
    }
    
    .search-button {
        padding: 0 1.2rem;
        font-size: 1rem;
    }
    
    .theme-toggle {
        width: 40px;
        height: 40px;
    }
    
    .theme-icon {
        font-size: 1rem;
    }
}

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
    border-radius: 10px;
}

::-webkit-scrollbar-thumb {
    background: var(--accent-primary);
    border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent-secondary);
}