/* ============ 全局基础 ============ */
:root {
    --bg-primary: #0f1419;
    --bg-secondary: #1a1f2e;
    --bg-card: #1e2536;
    --border: #2d3548;
    --text-primary: #e4e7ef;
    --text-secondary: #8b93a7;
    --accent-green: #22c55e;
    --accent-red: #ef4444;
    --accent-blue: #3b82f6;
    --accent-yellow: #eab308;
    --accent-purple: #a855f7;
    --radius: 8px;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.5;
}

/* ============ 导航栏 ============ */
.navbar {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    padding: 0 24px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 100;
}

.navbar-brand {
    font-size: 18px;
    font-weight: 700;
    color: var(--accent-blue);
    display: flex;
    align-items: center;
    gap: 8px;
}

.navbar-brand::before {
    content: "";
    display: inline-block;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--accent-green);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

.nav-links {
    display: flex;
    gap: 4px;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    padding: 8px 16px;
    border-radius: 6px;
    font-size: 14px;
    transition: all 0.2s;
}

.nav-links a:hover {
    color: var(--text-primary);
    background: var(--bg-card);
}

.nav-links a.active {
    color: var(--accent-blue);
    background: rgba(59, 130, 246, 0.1);
}

/* ============ 主内容区 ============ */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 24px;
}

.page-title {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 20px;
}

/* ============ 卡片 ============ */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    margin-bottom: 20px;
}

.card-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 16px;
}

/* ============ 指标卡片网格 ============ */
.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);
    border-radius: var(--radius);
    padding: 18px 20px;
}

.stat-label {
    font-size: 12px;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 6px;
}

.stat-value {
    font-size: 28px;
    font-weight: 700;
    font-variant-numeric: tabular-nums;
}

.stat-value.upload { color: var(--accent-red); }
.stat-value.download { color: var(--accent-green); }
.stat-value.requests { color: var(--accent-blue); }
.stat-value.processes { color: var(--accent-purple); }

.stat-sub {
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: 4px;
}

/* ============ 图表 ============ */
.chart-container {
    position: relative;
    height: 300px;
}

/* ============ 表格 ============ */
.table-wrap {
    overflow-x: auto;
}

table.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
}

table.data-table th {
    text-align: left;
    padding: 10px 12px;
    color: var(--text-secondary);
    font-weight: 500;
    border-bottom: 1px solid var(--border);
    white-space: nowrap;
}

table.data-table td {
    padding: 10px 12px;
    border-bottom: 1px solid var(--border);
    font-variant-numeric: tabular-nums;
}

table.data-table tr:hover td {
    background: rgba(255, 255, 255, 0.02);
}

.badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 11px;
    font-weight: 600;
}

.badge.get { background: rgba(59, 130, 246, 0.15); color: var(--accent-blue); }
.badge.post { background: rgba(168, 85, 247, 0.15); color: var(--accent-purple); }
.badge.put { background: rgba(234, 179, 8, 0.15); color: var(--accent-yellow); }
.badge.delete { background: rgba(239, 68, 68, 0.15); color: var(--accent-red); }

.upload-text { color: var(--accent-red); }
.download-text { color: var(--accent-green); }

/* ============ 两列布局 ============ */
.two-col {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

@media (max-width: 900px) {
    .two-col { grid-template-columns: 1fr; }
}

/* ============ 进度条（流量占比） ============ */
.bar-track {
    width: 100%;
    height: 6px;
    background: var(--bg-secondary);
    border-radius: 3px;
    overflow: hidden;
    margin-top: 4px;
}

.bar-fill {
    height: 100%;
    border-radius: 3px;
    transition: width 0.5s ease;
}

.bar-fill.upload { background: var(--accent-red); }
.bar-fill.download { background: var(--accent-green); }

/* ============ 状态点 ============ */
.status-dot {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    margin-right: 6px;
}

.status-dot.online { background: var(--accent-green); }
.status-dot.offline { background: var(--text-secondary); }

/* ============ 空状态 ============ */
.empty-state {
    text-align: center;
    padding: 40px;
    color: var(--text-secondary);
    font-size: 14px;
}

/* ============ 刷新时间 ============ */
.refresh-info {
    font-size: 12px;
    color: var(--text-secondary);
    text-align: right;
    margin-top: 8px;
}

/* ============ URL 流量监控 ============ */
.host-filter {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border);
    border-radius: 5px;
    padding: 4px 10px;
    font-size: 13px;
    cursor: pointer;
    max-width: 240px;
    outline: none;
}

.host-filter:hover { border-color: var(--accent-blue); }

.url-cell {
    white-space: nowrap;
    max-width: 380px;
}

.url-host {
    color: #7ec3ff;
    font-size: 12px;
    margin-right: 6px;
}

.url-cell code {
    color: var(--text-primary);
    font-size: 12px;
    word-break: break-all;
}

.referer-cell {
    color: var(--text-secondary);
    font-size: 12px;
    display: block;
    max-width: 240px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    cursor: help;
}

.last-seen-cell {
    color: var(--text-secondary);
    font-size: 12px;
    white-space: nowrap;
}

/* ============ 左右布局：侧边菜单 ============ */
.layout {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 210px;
    flex-shrink: 0;
    background: #12161f;
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    position: sticky;
    top: 0;
    height: 100vh;
}

.sidebar-brand {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 18px 20px;
    font-size: 15px;
    font-weight: 700;
    color: #7ec3ff;
    border-bottom: 1px solid var(--border);
}

.sidebar-dot {
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: var(--accent-green);
    animation: pulse 2s infinite;
    flex-shrink: 0;
}

.sidebar-nav {
    flex: 1;
    padding: 12px 10px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.sidebar-nav a {
    display: flex;
    align-items: center;
    gap: 10px;
    color: #cfd6e4;
    text-decoration: none;
    padding: 10px 14px;
    border-radius: 6px;
    font-size: 14px;
    transition: all 0.2s;
}

.sidebar-nav a:hover {
    color: #ffffff;
    background: #232c40;
}

.sidebar-nav a.active {
    color: #ffffff;
    background: rgba(59, 130, 246, 0.28);
    font-weight: 600;
}

.nav-icon {
    width: 22px;
    height: 22px;
    border-radius: 5px;
    background: #2a3348;
    color: #cfd6e4;
    font-size: 11px;
    font-weight: 700;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.sidebar-nav a.active .nav-icon {
    background: var(--accent-blue);
    color: #fff;
}

.sidebar-footer {
    padding: 14px 10px;
    border-top: 1px solid var(--border);
}

.logout-link {
    display: block;
    text-align: center;
    color: #cfd6e4;
    text-decoration: none;
    padding: 9px 0;
    border-radius: 6px;
    font-size: 13px;
    transition: all 0.2s;
}

.logout-link:hover {
    color: #ff9b9b;
    background: rgba(239, 68, 68, 0.12);
}

.main-content {
    flex: 1;
    min-width: 0;
}

.main-content .container {
    max-width: none;
    padding: 24px 28px;
}

@media (max-width: 900px) {
    .sidebar { width: 64px; }
    .sidebar-brand { font-size: 0; justify-content: center; padding: 16px 0; }
    .sidebar-nav a { justify-content: center; padding: 10px 0; font-size: 0; }
    .sidebar-nav a.active { font-size: 0; }
    .nav-icon { font-size: 11px; }
    .sidebar-footer { padding: 10px 6px; }
    .logout-link { font-size: 0; }
}

/* ============ 登录页 ============ */
.login-body {
    background: var(--bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 20px;
}

.login-card {
    width: 100%;
    max-width: 360px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 36px 32px;
}

.login-brand {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.login-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--accent-green);
    animation: pulse 2s infinite;
}

.login-sub {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 22px;
}

.login-error {
    background: rgba(239, 68, 68, 0.12);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: var(--accent-red);
    font-size: 13px;
    border-radius: 6px;
    padding: 9px 12px;
    margin-bottom: 16px;
}

/* ============ 表单 ============ */
.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    font-size: 12px;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

.form-group input {
    width: 100%;
    padding: 10px 12px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text-primary);
    font-size: 14px;
    box-sizing: border-box;
    outline: none;
    transition: border-color 0.2s;
}

.form-group input:focus {
    border-color: var(--accent-blue);
}

.btn-login {
    width: 100%;
    padding: 11px;
    background: var(--accent-blue);
    color: #fff;
    border: none;
    border-radius: 6px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    margin-top: 6px;
    transition: opacity 0.2s;
}

.btn-login:hover { opacity: 0.88; }

/* ============ 系统设置页 ============ */
.btn-primary {
    padding: 10px 22px;
    background: var(--accent-blue);
    color: #fff;
    border: none;
    border-radius: 6px;
    font-size: 14px;
    cursor: pointer;
    transition: opacity 0.2s;
}

.btn-primary:hover { opacity: 0.88; }
.btn-primary:disabled { opacity: 0.5; cursor: not-allowed; }

.btn-danger {
    padding: 10px 22px;
    background: rgba(239, 68, 68, 0.15);
    color: var(--accent-red);
    border: 1px solid rgba(239, 68, 68, 0.4);
    border-radius: 6px;
    font-size: 14px;
    cursor: pointer;
    margin-top: 14px;
    transition: all 0.2s;
}

.btn-danger:hover { background: rgba(239, 68, 68, 0.25); }
.btn-danger:disabled { opacity: 0.5; cursor: not-allowed; }

.db-info { margin-bottom: 6px; }

.db-row {
    display: flex;
    justify-content: space-between;
    padding: 7px 0;
    font-size: 13px;
    border-bottom: 1px solid rgba(45, 53, 72, 0.5);
}

.db-row span:first-child { color: var(--text-secondary); }
.db-row code { color: var(--text-primary); font-size: 12px; }

.hint {
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: 8px;
}

.pwd-form {
    max-width: 420px;
    margin-top: 6px;
}

.form-actions {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-top: 4px;
}

.form-msg { font-size: 13px; }
.form-msg.ok { color: var(--accent-green); }
.form-msg.error { color: var(--accent-red); }