/**
 * Redis Command Search - CSS样式
 * 
 * 功能：
 * - 现代化暗黑主题
 * - 卡片式命令展示
 * - 响应式布局
 * - 模态框详情
 */

:root {
    --bg-color: #0a0a12;
    --card-bg: #13131f;
    --text-primary: #e0e0e0;
    --text-secondary: #a0a0b0;
    --accent-cyan: #00f3ff;
    --accent-purple: #bc13fe;
    --accent-green: #00ff9d;
    --glow-cyan: 0 0 10px rgba(0, 243, 255, 0.5);
    --glow-purple: 0 0 10px rgba(188, 19, 254, 0.5);
    --border-color: #2a2a35;
}

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

/* 屏幕阅读器专用隐藏类 */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    overflow-x: hidden;
    min-height: 100vh;
}

/* Background Animation */
.bg-grid {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image:
        linear-gradient(rgba(42, 42, 53, 0.1) 1px, transparent 1px),
        linear-gradient(90deg, rgba(42, 42, 53, 0.1) 1px, transparent 1px);
    background-size: 40px 40px;
    z-index: -1;
    pointer-events: none;
}

/* Header */
header {
    text-align: center;
    padding: 60px 20px 40px;
    background: radial-gradient(circle at center, rgba(19, 19, 31, 0.8) 0%, transparent 70%);
}

h1 {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 10px;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent-cyan) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: 0 0 30px rgba(0, 243, 255, 0.2);
    letter-spacing: -1px;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: 40px;
}

/* Search Bar */
.search-container {
    max-width: 700px;
    margin: 0 auto 30px;
    position: relative;
}

#search-input {
    width: 100%;
    padding: 20px 60px 20px 30px;
    font-size: 1.2rem;
    background: rgba(19, 19, 31, 0.8);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    color: var(--text-primary);
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

#search-input:focus {
    outline: none;
    border-color: var(--accent-cyan);
    box-shadow: 0 0 0 3px rgba(0, 243, 255, 0.1), 0 0 25px rgba(0, 243, 255, 0.2);
    transform: scale(1.01);
}

.search-icon {
    position: absolute;
    right: 25px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
    font-size: 1.2rem;
    user-select: none;
}

/* Filters */
.filter-container {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 10px;
    max-width: 900px;
    margin: 0 auto 50px;
    padding: 0 20px;
}

.filter-tag {
    padding: 8px 16px;
    border-radius: 20px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.3s ease;
    user-select: none;
}

.filter-tag:hover {
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
    transform: translateY(-2px);
}

.filter-tag:focus {
    outline: 2px solid var(--accent-cyan);
    outline-offset: 2px;
}

.filter-tag.active {
    background: rgba(0, 243, 255, 0.1);
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
    box-shadow: var(--glow-cyan);
}

/* Command Grid */
.command-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px 60px;
}

.command-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 20px;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.command-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-cyan), var(--accent-purple));
    opacity: 0;
    transition: opacity 0.3s ease;
}

.command-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
    border-color: rgba(255, 255, 255, 0.1);
}

.command-card:focus {
    outline: 2px solid var(--accent-cyan);
    outline-offset: 2px;
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
}

.command-card:hover::before {
    opacity: 1;
}

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

.cmd-name {
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--accent-cyan);
}

.cmd-name mark,
.cmd-summary mark {
    background: rgba(0, 243, 255, 0.2);
    color: var(--accent-cyan);
    padding: 2px 4px;
    border-radius: 3px;
    font-weight: 600;
}

.cmd-group {
    font-size: 0.75rem;
    padding: 4px 8px;
    border-radius: 4px;
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-secondary);
    text-transform: uppercase;
}

.cmd-summary {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.5;
    flex-grow: 1;
}

/* Modal */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(8px);
    z-index: 1000;
    display: none;
    justify-content: center;
    align-items: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.modal-overlay.active {
    opacity: 1;
}

.modal-content {
    background: #1a1a24;
    width: 90%;
    max-width: 800px;
    max-height: 90vh;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
    overflow-y: auto;
    position: relative;
    transform: scale(0.9);
    transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.modal-overlay.active .modal-content {
    transform: scale(1);
}

.modal-header {
    padding: 30px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: linear-gradient(to right, rgba(0, 243, 255, 0.05), transparent);
}

.modal-title {
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
    font-size: 2rem;
    color: var(--accent-cyan);
    text-shadow: var(--glow-cyan);
}

.close-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.5rem;
    cursor: pointer;
    transition: color 0.2s;
    padding: 0;
    line-height: 1;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    user-select: none;
}

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

.close-btn:focus {
    outline: 2px solid var(--accent-cyan);
    outline-offset: 2px;
    color: var(--text-primary);
}

.modal-body {
    padding: 30px;
}

.section-title {
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-secondary);
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.section-title .icon {
    font-size: 1.1rem;
}

.syntax-box {
    background: #0f0f16;
    padding: 15px;
    border-radius: 8px;
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
    color: var(--accent-green);
    margin-bottom: 25px;
    border-left: 3px solid var(--accent-green);
    position: relative;
}

.copy-btn {
    position: absolute;
    right: 10px;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255, 255, 255, 0.1);
    border: none;
    color: var(--text-primary);
    padding: 5px 10px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1rem;
    transition: background 0.2s;
    user-select: none;
    line-height: 1;
}

.copy-btn:hover {
    background: rgba(255, 255, 255, 0.2);
}

.copy-btn:focus {
    outline: 2px solid var(--accent-cyan);
    outline-offset: 2px;
}

.desc-text {
    line-height: 1.6;
    margin-bottom: 25px;
    color: #d0d0d0;
}

.meta-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 25px;
}

.meta-item {
    background: rgba(255, 255, 255, 0.03);
    padding: 15px;
    border-radius: 8px;
}

.meta-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 5px;
}

.meta-value {
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
    color: var(--accent-purple);
}

.example-box {
    background: #0f0f16;
    border-radius: 8px;
    overflow: hidden;
}

.example-line {
    padding: 10px 15px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
    font-size: 0.9rem;
    display: flex;
    align-items: flex-start;
    line-height: 1.6;
}

.example-line:last-child {
    border-bottom: none;
}

.example-line.cmd {
    color: var(--accent-cyan);
    font-weight: 500;
}

.example-line.result {
    color: var(--text-secondary);
    font-style: normal;
    background: rgba(255, 255, 255, 0.02);
}

.prompt {
    color: var(--text-secondary);
    margin-right: 10px;
    user-select: none;
    opacity: 0.6;
    flex-shrink: 0;
}

.cmd {
    color: var(--accent-cyan);
}

.result {
    color: var(--text-secondary);
    font-style: italic;
    word-break: break-all;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-color);
}

::-webkit-scrollbar-thumb {
    background: #333;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #555;
}

/* 响应式优化 */
@media (max-width: 768px) {
    h1 {
        font-size: 2.5rem;
    }

    .command-grid {
        grid-template-columns: 1fr;
    }
    
    .modal-content {
        width: 95%;
        max-height: 95vh;
        margin: 10px;
    }
    
    .modal-header {
        padding: 20px;
    }
    
    .modal-title {
        font-size: 1.5rem;
    }
    
    .modal-body {
        padding: 20px;
    }
    
    #search-input {
        padding: 15px 50px 15px 20px;
        font-size: 1rem;
    }
    
    .filter-tag {
        font-size: 0.85rem;
        padding: 6px 12px;
    }
    
    .syntax-box {
        font-size: 0.85rem;
        padding: 12px;
        overflow-x: auto;
    }
    
    .example-line {
        font-size: 0.85rem;
        flex-direction: column;
        align-items: flex-start;
    }
    
    .prompt {
        margin-bottom: 4px;
    }
}