/* 
 * 搜索引擎样式表 
 * 简约圆角风格，支持卡片式布局和三态深色模式
 */

/* 字体导入 */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600&family=Outfit:wght@400;500;600;700&display=swap');

:root {
    /* 浅色模式变量 */
    --bg-color: #f8fafc;
    --card-bg: #ffffff;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --accent-color: #3b82f6;
    --accent-hover: #2563eb;
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --input-bg: #ffffff;
    --mark-bg: rgba(59, 130, 246, 0.2);
    --trans-speed: 0.3s;
}

/* 深色模式变量 */
[data-theme="dark"] {
    --bg-color: #0f172a;
    --card-bg: #1e293b;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --accent-color: #60a5fa;
    --accent-hover: #93c5fd;
    --border-color: #334155;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.3);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.5), 0 2px 4px -2px rgb(0 0 0 / 0.5);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.6), 0 4px 6px -4px rgb(0 0 0 / 0.6);
    --input-bg: #1e293b;
    --mark-bg: rgba(96, 165, 250, 0.3);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    transition: background-color var(--trans-speed), color var(--trans-speed);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* 布局容器 */
.container {
    max-width: 800px;
    margin: 0 auto;
    width: 100%;
    padding: 0 20px;
}

/* 页眉 */
header {
    height: 70px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 100;
    background-color: var(--bg-color);
    transition: background-color var(--trans-speed);
}

.brand {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    cursor: pointer;
}

.brand-icon {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    object-fit: contain;
}

.brand-name {
    font-family: 'Outfit', sans-serif;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
}

/* 深色模式切换按钮 */
.theme-toggle {
    background: none;
    border: 1px solid var(--border-color);
    width: 40px;
    height: 40px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--text-primary);
    transition: all 0.2s;
}

.theme-toggle:hover {
    background-color: var(--border-color);
    transform: translateY(-1px);
}

.theme-toggle svg {
    width: 20px;
    height: 20px;
}

/* 核心内容区 */
main {
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: 40px 0;
    transition: all 0.5s ease;
}

/* 初始状态：搜索居中 */
.search-centered main {
    justify-content: center;
    padding-bottom: 20vh;
}

.hero-box {
    text-align: center;
    margin-bottom: 40px;
    display: none;
}

.search-centered .hero-box {
    display: block;
}

.hero-box h1 {
    font-family: 'Outfit', sans-serif;
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 8px;
    background: linear-gradient(135deg, var(--accent-color), #8b5cf6);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* 搜索框 */
.search-wrapper {
    position: relative;
    width: 100%;
    max-width: 600px;
    margin: 0 auto;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.search-input-group {
    position: relative;
    display: flex;
    align-items: center;
}

.search-input {
    width: 100%;
    height: 56px;
    padding: 0 60px 0 24px;
    font-size: 1.125rem;
    border-radius: 28px;
    border: 1px solid var(--border-color);
    background-color: var(--input-bg);
    color: var(--text-primary);
    box-shadow: var(--shadow-md);
    outline: none;
    transition: all 0.3s;
}

.search-input:focus {
    box-shadow: var(--shadow-lg), 0 0 0 2px var(--mark-bg);
    border-color: var(--accent-color);
}

.search-btn {
    position: absolute;
    right: 8px;
    width: 44px;
    height: 44px;
    border-radius: 22px;
    background-color: var(--accent-color);
    border: none;
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.2s;
}

.search-btn:hover {
    background-color: var(--accent-hover);
}

/* 搜索结果 */
.results-container {
    margin-top: 40px;
    display: none;
}

.results-active .results-container {
    display: block;
}

.results-info {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 24px;
    padding-left: 4px;
}

.result-card {
    background-color: var(--card-bg);
    border-radius: 16px;
    padding: 24px;
    margin-bottom: 20px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    transition: transform 0.2s, box-shadow 0.2s;
    cursor: pointer;
    display: block;
    text-decoration: none;
    color: inherit;
}

.result-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--accent-color);
}

.result-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
    gap: 12px;
}

.result-meta {
    display: flex;
    align-items: center;
    gap: 8px;
    overflow: hidden;
}

.result-site-icon {
    width: 16px;
    height: 16px;
    border-radius: 4px;
    flex-shrink: 0;
}

.result-url {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.result-score {
    font-size: 0.75rem;
    color: var(--accent-color);
    background: rgba(59, 130, 246, 0.1);
    padding: 2px 8px;
    border-radius: 20px;
    font-weight: 600;
    flex-shrink: 0;
}

[data-theme="dark"] .result-score {
    background: rgba(96, 165, 250, 0.15);
}

.result-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--accent-color);
    margin-bottom: 8px;
    display: inline-block;
}

.result-snippet {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    display: -webkit-box;
    -webkit-line-clamp: 3;
    line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.result-snippet mark {
    background-color: var(--mark-bg);
    color: var(--text-primary);
    padding: 0 2px;
    border-radius: 4px;
    font-weight: 600;
}

/* 分页 */
.pagination {
    margin-top: 40px;
    display: flex;
    justify-content: center;
    gap: 8px;
    padding-bottom: 40px;
}

.page-btn {
    padding: 8px 16px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    background-color: var(--card-bg);
    color: var(--text-primary);
    cursor: pointer;
    font-size: 0.875rem;
    transition: all 0.2s;
}

.page-btn:hover:not(:disabled) {
    background-color: var(--border-color);
}

.page-btn.active {
    background-color: var(--accent-color);
    color: white;
    border-color: var(--accent-color);
}

.page-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

/* 加载动画 */
.loader {
    display: none;
    width: 32px;
    height: 32px;
    border: 3px solid var(--border-color);
    border-top: 3px solid var(--accent-color);
    border-radius: 50%;
    margin: 40px auto;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }

    100% {
        transform: rotate(360deg);
    }
}

/* 无结果或错误 */
.empty-state {
    text-align: center;
    padding: 60px 0;
    color: var(--text-secondary);
}

.empty-state svg {
    width: 64px;
    height: 64px;
    margin-bottom: 16px;
    opacity: 0.5;
}

/* 桌面端左右留白 */
@media (min-width: 1024px) {
    .container {
        padding: 0 40px;
    }
}

/* 竖屏端/移动端适配 */
@media (max-width: 768px) {
    header {
        height: 60px;
    }

    .container {
        padding: 0 16px;
    }

    .hero-box h1 {
        font-size: 2.25rem;
    }

    .brand-name {
        font-size: 1.1rem;
    }

    main {
        padding: 20px 0;
    }

    .search-centered main {
        padding-bottom: 10vh;
    }

    .result-card {
        padding: 16px;
        border-radius: 12px;
    }

    .result-title {
        font-size: 1.125rem;
    }
}