/* ============= 全局样式 ============= */
:root {
    --bg-primary: #0f1923;
    --bg-secondary: #1a2332;
    --bg-card: #1e2d3d;
    --bg-hover: #243447;
    --text-primary: #e6e8ea;
    --text-secondary: #8a9bae;
    --accent: #f0b90b;
    --green: #0ecb81;
    --red: #f6465d;
    --blue: #1e90ff;
    --border: #2a3a4a;
    --radius: 8px;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
}

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

/* 侧边栏 */
.sidebar {
    width: 220px;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border);
    position: fixed;
    height: 100vh;
    overflow-y: auto;
    z-index: 100;
}

.sidebar-logo {
    padding: 20px;
    text-align: center;
    border-bottom: 1px solid var(--border);
}

.sidebar-logo h2 {
    color: var(--accent);
    font-size: 16px;
}

.sidebar-logo small {
    color: var(--text-secondary);
    font-size: 11px;
}

.sidebar-nav {
    padding: 10px 0;
}

.nav-item {
    display: flex;
    align-items: center;
    padding: 12px 20px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s;
    border-left: 3px solid transparent;
    font-size: 14px;
}

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

.nav-item.active {
    background: var(--bg-hover);
    color: var(--accent);
    border-left-color: var(--accent);
}

.nav-item svg {
    width: 18px;
    height: 18px;
    margin-right: 10px;
    flex-shrink: 0;
}

/* 主内容区 */
.main-content {
    margin-left: 220px;
    flex: 1;
    padding: 20px;
    min-height: 100vh;
}

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.page-header h1 {
    font-size: 22px;
    font-weight: 600;
}

/* ============= 卡片 ============= */
.card {
    background: var(--bg-card);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    padding: 20px;
    margin-bottom: 16px;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.card-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
}

/* ============= 统计卡片 ============= */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 20px;
}

.stat-card {
    background: var(--bg-card);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    padding: 16px 20px;
}

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

.stat-value {
    font-size: 22px;
    font-weight: 700;
}

.stat-value.positive { color: var(--green); }
.stat-value.negative { color: var(--red); }

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

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

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

tbody td {
    padding: 10px 12px;
    border-bottom: 1px solid var(--border);
    white-space: nowrap;
}

tbody tr:hover {
    background: var(--bg-hover);
}

.text-green { color: var(--green); }
.text-red { color: var(--red); }
.text-yellow { color: var(--accent); }
.text-blue { color: var(--blue); }
.text-muted { color: var(--text-secondary); }

/* ============= 按钮 ============= */
.btn {
    display: inline-flex;
    align-items: center;
    padding: 8px 16px;
    border-radius: 6px;
    border: none;
    cursor: pointer;
    font-size: 13px;
    font-weight: 500;
    transition: all 0.2s;
    gap: 6px;
}

.btn-primary {
    background: var(--accent);
    color: #000;
}

.btn-primary:hover {
    background: #d4a20a;
}

.btn-success {
    background: var(--green);
    color: #fff;
}

.btn-danger {
    background: var(--red);
    color: #fff;
}

.btn-outline {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border);
}

.btn-outline:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.btn-sm {
    padding: 4px 10px;
    font-size: 12px;
}

/* ============= 徽标 ============= */
.badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 10px;
    font-size: 11px;
    font-weight: 500;
}

.badge-running { background: rgba(14,203,129,0.15); color: var(--green); }
.badge-stopped { background: rgba(138,155,174,0.15); color: var(--text-secondary); }
.badge-error { background: rgba(246,70,93,0.15); color: var(--red); }
.badge-active { background: rgba(14,203,129,0.15); color: var(--green); }
.badge-disabled { background: rgba(138,155,174,0.15); color: var(--text-secondary); }
.badge-completed { background: rgba(30,144,255,0.15); color: var(--blue); }
.badge-pending { background: rgba(240,185,11,0.15); color: var(--accent); }
.badge-failed { background: rgba(246,70,93,0.15); color: var(--red); }
.badge-long { background: rgba(14,203,129,0.15); color: var(--green); }
.badge-short { background: rgba(246,70,93,0.15); color: var(--red); }
.badge-simulated { background: rgba(240,185,11,0.15); color: var(--accent); }

/* ============= 表单 ============= */
.form-group {
    margin-bottom: 14px;
}

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

.form-control {
    width: 100%;
    padding: 8px 12px;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text-primary);
    font-size: 13px;
    outline: none;
    transition: border-color 0.2s;
}

.form-control:focus {
    border-color: var(--accent);
}

select.form-control {
    appearance: auto;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

/* ============= 模态框 ============= */
.modal-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    z-index: 1000;
    justify-content: center;
    align-items: center;
}

.modal-overlay.show {
    display: flex;
}

.modal {
    background: var(--bg-card);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    width: 520px;
    max-width: 90vw;
    max-height: 80vh;
    overflow-y: auto;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border);
}

.modal-header h3 {
    font-size: 16px;
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 20px;
    cursor: pointer;
}

.modal-body {
    padding: 20px;
}

.modal-footer {
    padding: 12px 20px;
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: flex-end;
    gap: 8px;
}

/* ============= 看板图表区 ============= */
.dashboard-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.chart-container {
    height: 250px;
    background: var(--bg-primary);
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    position: relative;
}

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

.empty-state p {
    margin-top: 8px;
    font-size: 14px;
}

/* ============= 隐藏页面 ============= */
.page {
    display: none;
}

.page.active {
    display: block;
}

/* ============= 登录页 ============= */
.login-overlay {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background: var(--bg-primary);
    z-index: 9999;
    display: flex;
    justify-content: center;
    align-items: center;
}
.login-overlay.hidden { display: none; }
.login-box {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 40px 36px;
    width: 380px;
    max-width: 90vw;
}
.login-logo { text-align: center; margin-bottom: 30px; }
.login-logo h2 { color: var(--accent); font-size: 22px; }
.login-logo small { color: var(--text-secondary); font-size: 12px; display: block; margin-top: 4px; }
.login-error { color: var(--red); font-size: 12px; margin-bottom: 10px; display: none; }

/* ============= 侧边栏用户信息 ============= */
.sidebar-user {
    padding: 12px 20px;
    border-top: 1px solid var(--border);
    font-size: 12px;
    color: var(--text-secondary);
    position: absolute;
    bottom: 0;
    width: 100%;
    background: var(--bg-secondary);
}
.sidebar-user .user-name { color: var(--text-primary); font-weight: 500; }
.sidebar-user .user-role { font-size: 11px; }

/* ============= 子菜单 ============= */
.nav-parent {
    position: relative;
}
.nav-parent .nav-arrow {
    position: absolute;
    right: 14px;
    width: 14px;
    height: 14px;
    transition: transform 0.2s;
}
.nav-parent.expanded .nav-arrow {
    transform: rotate(180deg);
}
.nav-submenu {
    display: none;
    overflow: hidden;
}
.nav-submenu.open {
    display: block;
}
.nav-child {
    padding-left: 48px !important;
    font-size: 13px;
}

/* ============= 系统管理面板 ============= */
.sys-panel { display: none; }
.sys-panel.active { display: block; }

/* ============= 大弹窗(回测详情) ============= */
.modal-lg {
    width: 90vw;
    max-width: 90vw;
    height: 85vh;
    max-height: 85vh;
    display: flex;
    flex-direction: column;
}
.modal-lg .modal-body {
    flex: 1;
    overflow-y: auto;
}

/* ============= 多选下拉组件 ============= */
.multi-select-wrap {
    position: relative;
}
.multi-select-trigger {
    width: 100%;
    min-height: 36px;
    padding: 4px 28px 4px 8px;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text-primary);
    font-size: 13px;
    cursor: pointer;
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    align-items: center;
}
.multi-select-trigger::after {
    content: "▾";
    position: absolute;
    right: 10px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
    font-size: 12px;
}
.multi-select-trigger:focus,
.multi-select-wrap.open .multi-select-trigger {
    border-color: var(--accent);
}
.multi-select-tag {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 2px 8px;
    background: rgba(240,185,11,0.15);
    color: var(--accent);
    border-radius: 10px;
    font-size: 11px;
    font-weight: 500;
}
.multi-select-placeholder {
    color: var(--text-secondary);
    font-size: 13px;
}
.multi-select-dropdown {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 6px;
    margin-top: 4px;
    max-height: 200px;
    overflow-y: auto;
    z-index: 10;
}
.multi-select-wrap.open .multi-select-dropdown {
    display: block;
}
.multi-select-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    cursor: pointer;
    font-size: 13px;
    color: var(--text-primary);
    transition: background 0.15s;
}
.multi-select-item:hover {
    background: var(--bg-hover);
}
.multi-select-item input[type="checkbox"] {
    accent-color: var(--accent);
}

/* ============= 中等弹窗 ============= */
.modal-md {
    width: 700px;
    max-width: 90vw;
    max-height: 85vh;
    display: flex;
    flex-direction: column;
}
.modal-md .modal-body {
    flex: 1;
    overflow-y: auto;
}

/* ============= 响应式 ============= */
@media (max-width: 768px) {
    .sidebar {
        width: 60px;
    }
    .sidebar-logo h2, .sidebar-logo small, .nav-item span {
        display: none;
    }
    .nav-item {
        justify-content: center;
        padding: 12px;
    }
    .nav-item svg {
        margin-right: 0;
    }
    .main-content {
        margin-left: 60px;
    }
    .stats-grid {
        grid-template-columns: 1fr 1fr;
    }
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
    .form-row {
        grid-template-columns: 1fr;
    }
}