/* 知识库网页系统 - 暗色科技感风格 */

@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;600&family=Space+Grotesk:wght@400;500;600;700&display=swap');

:root {
    --bg-deep: #0a0e17;
    --bg-surface: #111827;
    --bg-elevated: #1a2234;
    --bg-card: rgba(26, 34, 52, 0.7);
    --border: rgba(56, 189, 248, 0.15);
    --border-glow: rgba(56, 189, 248, 0.4);
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --accent-cyan: #38bdf8;
    --accent-blue: #3b82f6;
    --accent-purple: #a855f7;
    --accent-green: #22c55e;
    --gradient-cyber: linear-gradient(135deg, #0ea5e9 0%, #8b5cf6 50%, #ec4899 100%);
    --gradient-card: linear-gradient(145deg, rgba(56, 189, 248, 0.05) 0%, rgba(168, 85, 247, 0.05) 100%);
    --glow-cyan: 0 0 30px rgba(56, 189, 248, 0.3);
    --glow-purple: 0 0 30px rgba(168, 85, 247, 0.3);
}

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

body {
    font-family: 'Space Grotesk', -apple-system, sans-serif;
    background: var(--bg-deep);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    position: relative;
    overflow-x: hidden;
}

/* 背景网格效果 */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        linear-gradient(rgba(56, 189, 248, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(56, 189, 248, 0.03) 1px, transparent 1px);
    background-size: 50px 50px;
    pointer-events: none;
    z-index: 0;
}

/* 光晕效果 */
body::after {
    content: '';
    position: fixed;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 30% 20%, rgba(56, 189, 248, 0.08) 0%, transparent 40%),
                radial-gradient(circle at 70% 80%, rgba(168, 85, 247, 0.06) 0%, transparent 40%);
    pointer-events: none;
    z-index: 0;
    animation: pulse-glow 20s ease-in-out infinite;
}

@keyframes pulse-glow {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.6; }
}

/* ============ 登录页 ============ */
.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    z-index: 1;
    padding: 20px;
}

.login-container::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 600px;
    height: 600px;
    background: conic-gradient(from 0deg, transparent, var(--accent-cyan), transparent, var(--accent-purple), transparent);
    border-radius: 50%;
    opacity: 0.1;
    animation: rotate-bg 30s linear infinite;
    filter: blur(60px);
}

@keyframes rotate-bg {
    from { transform: translate(-50%, -50%) rotate(0deg); }
    to { transform: translate(-50%, -50%) rotate(360deg); }
}

.login-box {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 48px 40px;
    border-radius: 20px;
    border: 1px solid var(--border);
    width: 100%;
    max-width: 420px;
    position: relative;
    z-index: 1;
    box-shadow: var(--glow-cyan);
    animation: float-in 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes float-in {
    from {
        opacity: 0;
        transform: translateY(30px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.login-box::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-cyber);
    border-radius: 20px 20px 0 0;
}

.login-box h1 {
    text-align: center;
    margin-bottom: 8px;
    font-size: 28px;
    font-weight: 700;
    background: var(--gradient-cyber);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.5px;
}

.login-box h1::before {
    content: '';
    display: none;
}

.login-box::after {
    content: 'KNOWLEDGE BASE';
    display: block;
    text-align: center;
    font-size: 11px;
    letter-spacing: 4px;
    color: var(--text-muted);
    margin-bottom: 32px;
    font-family: 'JetBrains Mono', monospace;
}

.form-group {
    margin-bottom: 24px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    font-size: 13px;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
    font-family: 'JetBrains Mono', monospace;
}

.form-group input {
    width: 100%;
    padding: 14px 16px;
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: 10px;
    font-size: 15px;
    color: var(--text-primary);
    font-family: 'Space Grotesk', sans-serif;
    transition: all 0.3s ease;
}

.form-group input::placeholder {
    color: var(--text-muted);
}

.form-group input:focus {
    outline: none;
    border-color: var(--accent-cyan);
    box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.15), var(--glow-cyan);
    background: var(--bg-elevated);
}

.btn-primary {
    width: 100%;
    padding: 14px 24px;
    background: var(--gradient-cyber);
    color: white;
    border: none;
    border-radius: 10px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    font-family: 'Space Grotesk', sans-serif;
    letter-spacing: 0.5px;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s ease;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(56, 189, 248, 0.4);
}

.btn-primary:hover::before {
    left: 100%;
}

.btn-primary:active {
    transform: translateY(0);
}

.error {
    background: rgba(239, 68, 68, 0.15);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: #f87171;
    padding: 12px 16px;
    border-radius: 10px;
    margin-bottom: 24px;
    text-align: center;
    font-size: 14px;
    animation: shake 0.5s ease;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

/* ============ 主页 ============ */
.dashboard {
    max-width: 1100px;
    margin: 0 auto;
    padding: 32px 24px;
    position: relative;
    z-index: 1;
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 32px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border);
    animation: fade-down 0.5s ease;
}

@keyframes fade-down {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.header h1 {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 12px;
}

.header h1::before {
    content: '';
    display: none;
}

.header h1::after {
    content: '';
    width: 8px;
    height: 8px;
    background: var(--accent-green);
    border-radius: 50%;
    animation: pulse-dot 2s ease-in-out infinite;
    box-shadow: 0 0 10px var(--accent-green);
}

@keyframes pulse-dot {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.2); }
}

.user-info {
    display: flex;
    align-items: center;
    gap: 16px;
}

.user-info span {
    color: var(--text-secondary);
    font-size: 14px;
    font-family: 'JetBrains Mono', monospace;
}

.user-info span::before {
    content: '// ';
    color: var(--text-muted);
}

.btn-logout {
    padding: 10px 20px;
    background: transparent;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: 8px;
    font-size: 13px;
    font-weight: 500;
    border: 1px solid var(--border);
    transition: all 0.3s ease;
    font-family: 'JetBrains Mono', monospace;
}

.btn-logout:hover {
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
    box-shadow: 0 0 15px rgba(56, 189, 248, 0.2);
}

/* 搜索栏 */
.search-bar {
    margin-bottom: 24px;
    animation: fade-up 0.5s ease 0.1s both;
}

@keyframes fade-up {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.search-bar form {
    display: flex;
    gap: 12px;
}

.search-bar input {
    flex: 1;
    padding: 14px 20px;
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border);
    border-radius: 12px;
    font-size: 15px;
    color: var(--text-primary);
    font-family: 'Space Grotesk', sans-serif;
    transition: all 0.3s ease;
}

.search-bar input::placeholder {
    color: var(--text-muted);
}

.search-bar input:focus {
    outline: none;
    border-color: var(--accent-cyan);
    box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.15);
}

.search-bar button {
    padding: 14px 28px;
    background: var(--bg-elevated);
    color: var(--accent-cyan);
    border: 1px solid var(--accent-cyan);
    border-radius: 12px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    font-family: 'JetBrains Mono', monospace;
    transition: all 0.3s ease;
}

.search-bar button:hover {
    background: var(--accent-cyan);
    color: var(--bg-deep);
    box-shadow: var(--glow-cyan);
}

.btn-clear {
    padding: 14px 20px;
    background: transparent;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: 12px;
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    font-size: 14px;
    transition: all 0.3s ease;
}

.btn-clear:hover {
    border-color: var(--text-secondary);
    color: var(--text-primary);
}

.stats {
    color: var(--text-muted);
    margin-bottom: 20px;
    font-size: 13px;
    font-family: 'JetBrains Mono', monospace;
    animation: fade-up 0.5s ease 0.15s both;
}

.stats::before {
    content: '> ';
    color: var(--accent-cyan);
}

.search-hint {
    color: var(--text-secondary);
}

/* 文档列表 */
.document-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
    animation: fade-up 0.5s ease 0.2s both;
}

.document-card {
    display: flex;
    gap: 16px;
    padding: 20px 24px;
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border-radius: 14px;
    text-decoration: none;
    color: inherit;
    border: 1px solid var(--border);
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    position: relative;
    overflow: hidden;
}

.document-card::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--gradient-cyber);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.document-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-card);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.document-card:hover {
    transform: translateX(8px);
    border-color: var(--border-glow);
    box-shadow: var(--glow-cyan);
}

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

.document-card:hover::after {
    opacity: 1;
}

.doc-icon {
    font-size: 28px;
    flex-shrink: 0;
    filter: grayscale(0.3);
    transition: filter 0.3s ease;
    position: relative;
    z-index: 1;
}

.document-card:hover .doc-icon {
    filter: grayscale(0);
}

.doc-info {
    flex: 1;
    min-width: 0;
    position: relative;
    z-index: 1;
}

.doc-title {
    font-size: 17px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
    line-height: 1.4;
}

.doc-meta {
    font-size: 12px;
    color: var(--text-muted);
    margin-bottom: 10px;
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    font-family: 'JetBrains Mono', monospace;
}

.doc-meta .meta-author,
.doc-meta .meta-date,
.doc-meta .meta-platform {
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.doc-summary {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.6;
    opacity: 0.85;
}

.doc-name {
    display: none;
}

.doc-preview {
    display: none;
}

.empty {
    text-align: center;
    padding: 80px 20px;
    color: var(--text-muted);
    font-size: 16px;
    animation: fade-up 0.5s ease;
}

.empty::before {
    content: '[ ]';
    display: block;
    font-family: 'JetBrains Mono', monospace;
    font-size: 48px;
    color: var(--border);
    margin-bottom: 16px;
}

/* 文件夹分隔符 */
.folder-separator {
    padding: 14px 20px;
    background: var(--bg-elevated);
    border-left: 3px solid var(--accent-purple);
    margin: 8px 0;
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 13px;
    font-family: 'JetBrains Mono', monospace;
    border-radius: 0 8px 8px 0;
    letter-spacing: 0.5px;
    animation: fade-up 0.3s ease;
}

.folder-separator::before {
    content: none;
}

/* ============ 文档查看页 ============ */
.view-page {
    max-width: 900px;
    margin: 0 auto;
    padding: 32px 24px;
    position: relative;
    z-index: 1;
}

.view-page .header {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
    animation: fade-down 0.5s ease;
}

.folder-info {
    color: var(--text-muted);
    font-size: 12px;
    font-family: 'JetBrains Mono', monospace;
    margin-top: 4px;
}

.folder-info::before {
    content: '~/ ';
    color: var(--accent-cyan);
}

.btn-back {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 18px;
    background: transparent;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: 8px;
    font-size: 13px;
    border: 1px solid var(--border);
    font-family: 'JetBrains Mono', monospace;
    transition: all 0.3s ease;
}

.btn-back:hover {
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
}

.btn-back::before {
    content: '←';
}

.document-content {
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    padding: 48px;
    border-radius: 16px;
    border: 1px solid var(--border);
    line-height: 1.8;
    animation: fade-up 0.5s ease 0.1s both;
}

.document-content h1 {
    font-size: 32px;
    margin: 32px 0 20px 0;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border);
    color: var(--text-primary);
    font-weight: 700;
}

.document-content h1:first-child {
    margin-top: 0;
}

.document-content h2 {
    font-size: 24px;
    margin: 28px 0 16px 0;
    color: var(--text-primary);
    font-weight: 600;
}

.document-content h3 {
    font-size: 18px;
    margin: 20px 0 12px 0;
    color: var(--accent-cyan);
    font-weight: 600;
}

.document-content p {
    margin-bottom: 16px;
    color: var(--text-secondary);
}

.document-content ul {
    margin: 16px 0;
    padding-left: 24px;
    color: var(--text-secondary);
}

.document-content li {
    margin-bottom: 8px;
}

.document-content li::marker {
    color: var(--accent-cyan);
}

.document-content code {
    background: var(--bg-surface);
    padding: 3px 8px;
    border-radius: 6px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 13px;
    color: var(--accent-cyan);
    border: 1px solid var(--border);
}

.document-content pre {
    background: var(--bg-surface);
    padding: 20px;
    border-radius: 12px;
    overflow-x: auto;
    margin: 20px 0;
    border: 1px solid var(--border);
}

.document-content pre code {
    background: none;
    padding: 0;
    border: none;
    color: var(--text-primary);
}

.document-content a {
    color: var(--accent-cyan);
    text-decoration: none;
    border-bottom: 1px dashed var(--accent-cyan);
    transition: all 0.2s ease;
}

.document-content a:hover {
    color: var(--accent-purple);
    border-color: var(--accent-purple);
}

/* 搜索高亮 */
mark {
    background: rgba(250, 204, 21, 0.3);
    color: #fde047;
    padding: 2px 6px;
    border-radius: 4px;
}

/* ============ 响应式 ============ */
@media (max-width: 640px) {
    .login-box {
        margin: 16px;
        padding: 32px 24px;
    }
    
    .header {
        flex-direction: column;
        gap: 16px;
        align-items: flex-start;
    }
    
    .search-bar form {
        flex-wrap: wrap;
    }
    
    .search-bar input {
        width: 100%;
    }
    
    .search-bar button,
    .btn-clear {
        flex: 1;
        text-align: center;
        justify-content: center;
    }
    
    .document-card {
        padding: 16px;
    }
    
    .doc-icon {
        display: none;
    }
    
    .document-content {
        padding: 24px;
    }
    
    .document-content h1 {
        font-size: 24px;
    }
    
    .document-content h2 {
        font-size: 20px;
    }
}

/* ============ 滚动条 ============ */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 4px;
}

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

/* ============ 选中文本 ============ */
::selection {
    background: rgba(56, 189, 248, 0.3);
    color: var(--text-primary);
}