/* ========================================
   三端系统 - 公共样式（军事暗色 + 科技感）
   ======================================== */

/* --- 基础变量 --- */
:root {
    --bg-dark: #0a0e17;
    --bg-card: rgba(15, 23, 42, 0.85);
    --bg-card-hover: rgba(20, 30, 55, 0.9);
    --bg-input: rgba(15, 23, 42, 0.6);
    --border-color: rgba(56, 189, 248, 0.15);
    --border-glow: rgba(56, 189, 248, 0.4);
    --accent: #38bdf8;
    --accent-bright: #7dd3fc;
    --accent-dim: #0284c7;
    --gold: #fbbf24;
    --gold-bright: #fde68a;
    --green: #34d399;
    --green-bright: #6ee7b7;
    --red: #f87171;
    --orange: #fb923c;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-dim: #64748b;
    --radius: 16px;
    --radius-sm: 10px;
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
    --shadow-glow: 0 0 30px rgba(56, 189, 248, 0.15);
    --font-cn: 'Noto Sans SC', -apple-system, sans-serif;
    --font-en: 'Orbitron', monospace;
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { font-size: 16px; -webkit-font-smoothing: antialiased; }

body {
    font-family: var(--font-cn);
    background: var(--bg-dark);
    color: var(--text-primary);
    min-height: 100vh;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* --- 布局 --- */
.app-layout {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 220px;
    background: rgba(10, 14, 23, 0.95);
    border-right: 1px solid var(--border-color);
    padding: 20px 0;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: 100;
    display: flex;
    flex-direction: column;
}

.sidebar-logo {
    padding: 10px 20px 20px;
    font-family: var(--font-en);
    font-size: 1.1rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-bright), var(--gold));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 10px;
}

.sidebar-logo small {
    display: block;
    font-family: var(--font-cn);
    font-size: 0.7rem;
    color: var(--text-dim);
    -webkit-text-fill-color: var(--text-dim);
    margin-top: 4px;
    letter-spacing: 2px;
}

.nav-items { flex: 1; overflow-y: auto; }

.nav-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 20px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s;
    font-size: 0.9rem;
    border-left: 3px solid transparent;
}

.nav-item:hover {
    background: rgba(56, 189, 248, 0.05);
    color: var(--text-primary);
}

.nav-item.active {
    background: rgba(56, 189, 248, 0.1);
    color: var(--accent-bright);
    border-left-color: var(--accent);
}

.nav-item .icon { font-size: 1.1rem; width: 24px; text-align: center; }

.sidebar-footer {
    padding: 15px 20px;
    border-top: 1px solid var(--border-color);
    font-size: 0.75rem;
    color: var(--text-dim);
}

.main-content {
    flex: 1;
    margin-left: 220px;
    padding: 24px;
    min-height: 100vh;
}

/* --- 顶部栏 --- */
.top-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border-color);
}

.page-title {
    font-size: 1.3rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 8px;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.logout-btn {
    padding: 6px 14px;
    border: 1px solid var(--red);
    border-radius: 6px;
    background: transparent;
    color: var(--red);
    cursor: pointer;
    font-size: 0.8rem;
    transition: all 0.2s;
}
.logout-btn:hover { background: rgba(248, 113, 113, 0.15); }

/* --- 卡片 --- */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 24px;
    backdrop-filter: blur(20px);
    box-shadow: var(--shadow);
    margin-bottom: 20px;
}

.card-title {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--accent-bright);
}

/* --- 统计卡片 --- */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 20px;
    text-align: center;
    transition: all 0.3s;
}
.stat-card:hover {
    border-color: var(--border-glow);
    box-shadow: var(--shadow-glow);
}

.stat-value {
    font-family: var(--font-en);
    font-size: 2rem;
    font-weight: 900;
    background: linear-gradient(135deg, var(--accent-bright), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}
.stat-value.gold {
    background: linear-gradient(135deg, var(--gold-bright), var(--gold));
    -webkit-background-clip: text;
}
.stat-value.green {
    background: linear-gradient(135deg, var(--green-bright), var(--green));
    -webkit-background-clip: text;
}
.stat-value.red {
    background: linear-gradient(135deg, var(--red), #dc2626);
    -webkit-background-clip: text;
}

.stat-label {
    font-size: 0.8rem;
    color: var(--text-dim);
    margin-top: 4px;
    letter-spacing: 1px;
}

/* --- 按钮 --- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 20px;
    border: none;
    border-radius: 8px;
    font-family: var(--font-cn);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    letter-spacing: 1px;
}
.btn-primary {
    background: linear-gradient(135deg, var(--accent-dim), var(--accent));
    color: white;
}
.btn-primary:hover { box-shadow: 0 4px 15px rgba(56, 189, 248, 0.3); transform: translateY(-1px); }
.btn-success {
    background: linear-gradient(135deg, #059669, var(--green));
    color: white;
}
.btn-success:hover { box-shadow: 0 4px 15px rgba(52, 211, 153, 0.3); }
.btn-warning {
    background: linear-gradient(135deg, #d97706, var(--orange));
    color: white;
}
.btn-danger {
    background: linear-gradient(135deg, #dc2626, var(--red));
    color: white;
}
.btn-outline {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
}
.btn-outline:hover { border-color: var(--accent); color: var(--accent-bright); }
.btn-sm { padding: 6px 12px; font-size: 0.78rem; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none !important; }

/* --- 表格 --- */
.table-wrap { overflow-x: auto; }
table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.85rem;
}
thead th {
    padding: 12px;
    text-align: left;
    color: var(--text-dim);
    font-weight: 500;
    border-bottom: 1px solid var(--border-color);
    white-space: nowrap;
    font-size: 0.8rem;
    letter-spacing: 1px;
}
tbody td {
    padding: 12px;
    border-bottom: 1px solid rgba(255,255,255,0.03);
    color: var(--text-secondary);
}
tbody tr:hover { background: rgba(56, 189, 248, 0.03); }

/* --- 表单 --- */
.form-group { margin-bottom: 16px; }
.form-label {
    display: block;
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 6px;
    font-weight: 500;
}
.form-input, .form-select, .form-textarea {
    width: 100%;
    padding: 10px 14px;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-family: var(--font-cn);
    font-size: 0.9rem;
    transition: border-color 0.3s;
}
.form-input:focus, .form-select:focus, .form-textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 15px rgba(56, 189, 248, 0.1);
}
.form-input::placeholder { color: var(--text-dim); }
.form-textarea { resize: vertical; min-height: 80px; }

/* --- 状态标签 --- */
.badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.5px;
}
.badge-success { background: rgba(52,211,153,0.15); color: var(--green); border: 1px solid rgba(52,211,153,0.3); }
.badge-warning { background: rgba(251,191,36,0.15); color: var(--gold); border: 1px solid rgba(251,191,36,0.3); }
.badge-danger { background: rgba(248,113,113,0.15); color: var(--red); border: 1px solid rgba(248,113,113,0.3); }
.badge-info { background: rgba(56,189,248,0.15); color: var(--accent); border: 1px solid rgba(56,189,248,0.3); }

/* --- 公告条 --- */
.notice-bar {
    background: linear-gradient(90deg, rgba(251,191,36,0.1), rgba(251,191,36,0.05));
    border: 1px solid rgba(251,191,36,0.2);
    border-radius: 8px;
    padding: 10px 16px;
    font-size: 0.82rem;
    color: var(--gold);
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 8px;
}

/* --- 弹窗 --- */
.modal-overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    backdrop-filter: blur(4px);
}
.modal {
    background: var(--bg-dark);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 28px;
    width: 90%;
    max-width: 500px;
    max-height: 80vh;
    overflow-y: auto;
    box-shadow: 0 20px 60px rgba(0,0,0,0.5);
}
.modal-title {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--accent-bright);
}

/* --- Toast --- */
.toast {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: 12px 24px;
    border-radius: 10px;
    font-size: 0.85rem;
    z-index: 9999;
    opacity: 0;
    transform: translateX(100px);
    transition: all 0.4s ease;
    backdrop-filter: blur(10px);
}
.toast.show { opacity: 1; transform: translateX(0); }
.toast.success { background: rgba(52,211,153,0.2); border: 1px solid rgba(52,211,153,0.4); color: var(--green-bright); }
.toast.error { background: rgba(248,113,113,0.2); border: 1px solid rgba(248,113,113,0.4); color: var(--red); }
.toast.info { background: rgba(56,189,248,0.2); border: 1px solid rgba(56,189,248,0.4); color: var(--accent-bright); }

/* --- 分页 --- */
.pagination {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 20px;
}
.page-btn {
    padding: 6px 14px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 0.82rem;
    transition: all 0.2s;
}
.page-btn:hover { border-color: var(--accent); color: var(--accent); }
.page-btn.active { background: var(--accent); color: white; border-color: var(--accent); }

/* --- 登录页 --- */
.login-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 20px;
}
.login-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 40px 36px;
    width: 100%;
    max-width: 400px;
    backdrop-filter: blur(20px);
    box-shadow: var(--shadow), var(--shadow-glow);
}
.login-title {
    font-family: var(--font-en);
    font-size: 1.5rem;
    text-align: center;
    margin-bottom: 8px;
    background: linear-gradient(135deg, var(--accent-bright), var(--gold));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}
.login-subtitle {
    text-align: center;
    font-size: 0.82rem;
    color: var(--text-dim);
    margin-bottom: 30px;
}

/* --- 空状态 --- */
.empty-state {
    text-align: center;
    padding: 40px;
    color: var(--text-dim);
}
.empty-state .icon { font-size: 2.5rem; margin-bottom: 12px; }
.empty-state p { font-size: 0.85rem; }

/* --- 响应式 --- */
@media (max-width: 768px) {
    .sidebar {
        position: fixed;
        top: auto;
        bottom: 0;
        left: 0;
        right: 0;
        width: 100%;
        height: auto;
        flex-direction: row;
        padding: 0;
        border-right: none;
        border-top: 1px solid var(--border-color);
        background: rgba(10, 14, 23, 0.98);
        z-index: 200;
    }
    .sidebar-logo, .sidebar-footer { display: none; }
    .nav-items {
        display: flex;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }
    .nav-item {
        flex-direction: column;
        padding: 8px 12px;
        font-size: 0.65rem;
        gap: 2px;
        white-space: nowrap;
        border-left: none;
        border-top: 2px solid transparent;
        min-width: 60px;
        text-align: center;
        justify-content: center;
    }
    .nav-item.active {
        border-left-color: transparent;
        border-top-color: var(--accent);
    }
    .nav-item .icon { font-size: 1rem; width: auto; }
    .main-content {
        margin-left: 0;
        padding: 12px 12px 80px;
    }
    .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 8px; }
    .stat-value { font-size: 1.4rem; }
    .card { padding: 16px; border-radius: 12px; }
    .card-title { font-size: 0.9rem; }
    .top-bar { flex-wrap: wrap; gap: 8px; }
    .page-title { font-size: 1rem; }
    table { font-size: 0.78rem; }
    thead th, tbody td { padding: 8px; }
    .btn { padding: 8px 14px; font-size: 0.8rem; }
    .btn-sm { padding: 5px 10px; font-size: 0.72rem; }
    .login-card { padding: 28px 24px; }
}

/* --- 滚动条 --- */
::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(56,189,248,0.2); border-radius: 4px; }