:root {
    --primary-color: #1890ff;
    --success-color: #52c41a;
    --warning-color: #faad14;
    --danger-color: #f5222d;
    --info-color: #13c2c2;
    --text-color: #333;
    --text-secondary: #666;
    --text-muted: #999;
    --border-color: #f0f0f0;
    --bg-color: #f5f7fa;
    --sidebar-width: 220px;
    --header-height: 64px;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    font-size: 14px;
    line-height: 1.5;
}

a {
    text-decoration: none;
    color: inherit;
}

/* Layout */
.app-container {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    background-color: #fff;
    border-right: 1px solid #e8e8e8;
    position: fixed;
    height: 100vh;
    left: 0;
    top: 0;
    z-index: 100;
    display: flex;
    flex-direction: column;
}

.logo {
    height: var(--header-height);
    padding: 0 24px;
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 18px;
    font-weight: 600;
    color: var(--primary-color);
    border-bottom: 1px solid var(--border-color);
}

.logo i {
    font-size: 24px;
}

.nav-menu {
    padding: 16px 0;
    flex: 1;
}

.nav-item {
    display: flex;
    align-items: center;
    padding: 12px 24px;
    color: var(--text-secondary);
    transition: all 0.3s;
    cursor: pointer;
    border-left: 3px solid transparent;
    margin-bottom: 4px;
}

.nav-item:hover {
    color: var(--primary-color);
    background-color: #e6f7ff;
}

.nav-item.active {
    color: var(--primary-color);
    background-color: #e6f7ff;
    border-left-color: var(--primary-color);
}

.nav-item i {
    width: 20px;
    margin-right: 10px;
    font-size: 16px;
    text-align: center;
}

.logout {
    position: absolute;
    bottom: 20px;
    width: 100%;
    border-top: 1px solid var(--border-color);
    padding-top: 10px;
}

/* Main Content */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    padding: 24px;
    min-height: 100vh;
}

.page-header {
    margin-bottom: 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.page-title {
    font-size: 20px;
    font-weight: 500;
    color: var(--text-color);
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-bottom: 24px;
}

.stat-card {
    background: #fff;
    padding: 24px;
    border-radius: 4px;
    box-shadow: 0 1px 2px rgba(0,0,0,0.05);
    transition: all 0.3s;
    display: flex;
    flex-direction: column;
}

.stat-card:hover {
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    transform: translateY(-2px);
}

.stat-label {
    color: var(--text-muted);
    font-size: 14px;
    margin-bottom: 8px;
}

.stat-value {
    font-size: 32px;
    font-weight: 600;
    line-height: 1;
    margin-bottom: 8px;
}

.stat-value.blue { color: var(--primary-color); }
.stat-value.green { color: var(--success-color); }
.stat-value.cyan { color: var(--info-color); }
.stat-value.gold { color: var(--warning-color); }

.stat-desc {
    font-size: 14px;
    color: var(--text-muted);
}

/* Content Grid */
.content-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 24px;
}

/* Card/Panel Alias */
.card, .panel {
    background: #fff;
    border-radius: 4px;
    box-shadow: 0 1px 2px rgba(0,0,0,0.05);
    overflow: hidden;
    margin-bottom: 24px;
}

.panel-header, .card-header {
    padding: 16px 24px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 500;
    font-size: 16px;
}

.panel-body, .card-body {
    padding: 24px;
}

/* Tables */
.table {
    width: 100%;
    border-collapse: collapse;
}

.table th, .table td {
    padding: 16px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.table th {
    background-color: #fafafa;
    font-weight: 500;
    color: var(--text-secondary);
}

.table tr:hover td {
    background-color: #fafafa;
}

/* Environment Table */
.env-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 0;
    border-bottom: 1px solid var(--border-color);
}

.env-row:last-child {
    border-bottom: none;
}

.env-label {
    color: var(--text-secondary);
}

/* Badges */
.badge {
    display: inline-block;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 12px;
    line-height: 1;
}

.badge-gray { background-color: #f5f5f5; color: var(--text-secondary); border: 1px solid #d9d9d9; }
.badge-green { background-color: #f6ffed; color: var(--success-color); border: 1px solid #b7eb8f; }
.badge-blue { background-color: #e6f7ff; color: var(--primary-color); border: 1px solid #91d5ff; }
.badge-red { background-color: #fff1f0; color: var(--danger-color); border: 1px solid #ffa39e; }
.badge-orange { background-color: #fff7e6; color: var(--warning-color); border: 1px solid #ffd591; }

.bg-success { background-color: var(--success-color); color: #fff; }
.bg-danger { background-color: var(--danger-color); color: #fff; }
.bg-warning { background-color: var(--warning-color); color: #fff; }

/* Forms & Buttons */
.btn {
    display: inline-block;
    padding: 8px 16px;
    border-radius: 4px;
    border: 1px solid transparent;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.3s;
}

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

.btn-primary:hover {
    background-color: #40a9ff;
}

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

.form-control {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid #d9d9d9;
    border-radius: 4px;
    transition: all 0.3s;
}

.form-control:focus {
    border-color: var(--primary-color);
    outline: none;
    box-shadow: 0 0 0 2px rgba(24, 144, 255, 0.2);
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.45);
}

.modal-content {
    background-color: #fff;
    margin: 100px auto;
    padding: 0;
    border-radius: 4px;
    width: 500px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    animation: slideDown 0.3s ease-out;
}

.modal-header {
    padding: 16px 24px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 16px;
    font-weight: 500;
}

.modal-body {
    padding: 24px;
}

.modal-footer {
    padding: 10px 16px;
    border-top: 1px solid var(--border-color);
    text-align: right;
    background-color: #fafafa;
    border-radius: 0 0 4px 4px;
}

.close, .modal-close {
    cursor: pointer;
    font-size: 20px;
    color: var(--text-muted);
}

.close:hover, .modal-close:hover {
    color: var(--text-color);
}

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

/* Suggestion List */
.suggestion-list {
    list-style: none;
}

.suggestion-item {
    display: flex;
    gap: 12px;
    padding: 12px 0;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-secondary);
}

.suggestion-item:last-child {
    border-bottom: none;
}

.suggestion-item i {
    color: var(--warning-color);
    margin-top: 3px;
}

/* Pagination */
.pagination {
    display: flex;
    list-style: none;
    gap: 5px;
    margin-top: 20px;
}

.page-item .page-link {
    display: block;
    padding: 8px 12px;
    border: 1px solid #d9d9d9;
    border-radius: 4px;
    color: var(--text-color);
    transition: all 0.3s;
}

.page-item .page-link:hover {
    color: var(--primary-color);
    border-color: var(--primary-color);
}

.page-item.active .page-link {
    background-color: var(--primary-color);
    color: #fff;
    border-color: var(--primary-color);
}

.page-item.disabled .page-link {
    color: var(--text-muted);
    background-color: #f5f5f5;
    border-color: #d9d9d9;
    cursor: not-allowed;
}

/* Responsive */
@media (max-width: 992px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .content-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
        transition: transform 0.3s;
    }
    .main-content {
        margin-left: 0;
    }
    .sidebar.active {
        transform: translateX(0);
    }
    .stats-grid {
        grid-template-columns: 1fr;
    }
}

/* Utilities */
.d-flex { display: flex; }
.justify-content-between { justify-content: space-between; }
.align-items-center { align-items: center; }
.flex-wrap { flex-wrap: wrap; }
.flex-md-nowrap { flex-wrap: nowrap; } /* Simplified */

.mb-3 { margin-bottom: 16px; }
.mb-2 { margin-bottom: 8px; }
.mt-3 { margin-top: 16px; }
.me-2 { margin-right: 8px; }
.pt-3 { padding-top: 16px; }
.pb-2 { padding-bottom: 8px; }

.border-bottom { border-bottom: 1px solid var(--border-color); }

.text-end { text-align: right; }
.text-center { text-align: center; }

/* Alert */
.alert {
    padding: 12px 16px;
    margin-bottom: 16px;
    border: 1px solid transparent;
    border-radius: 4px;
}
.alert-success {
    color: #0f5132;
    background-color: #d1e7dd;
    border-color: #badbcc;
}
.alert-danger {
    color: #842029;
    background-color: #f8d7da;
    border-color: #f5c2c7;
}

/* Form */
.form-label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
}

/* Modal Compatibility */
.modal-dialog {
    background-color: #fff;
    margin: 100px auto;
    padding: 0;
    border-radius: 4px;
    width: 500px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    animation: slideDown 0.3s ease-out;
    position: relative; /* Ensure z-index works if needed */
}

/* Table Responsive */
.table-responsive {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

/* Helper Classes */
.w-100 { width: 100%; }
.gap-2 { gap: 8px; }
.bg-light { background-color: #fafafa; }
.text-muted { color: var(--text-muted); }

/* Grid Helpers */
.grid-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
}
@media (max-width: 992px) {
    .grid-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
    .grid-4 { grid-template-columns: 1fr; }
}

/* Outline Buttons */
.btn-outline-primary {
    background: transparent;
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
}
.btn-outline-primary:hover {
    background: var(--primary-color);
    color: #fff;
}
.btn-outline-danger {
    background: transparent;
    color: var(--danger-color);
    border: 1px solid var(--danger-color);
}
.btn-outline-danger:hover {
    background: var(--danger-color);
    color: #fff;
}
.btn-secondary {
    background: #f5f5f5;
    color: var(--text-color);
    border: 1px solid #d9d9d9;
}
.btn-secondary:hover {
    background: #e6e6e6;
}

/* Login Page */
.login-page {
    background-color: #f0f2f5;
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100vh;
}

.login-card {
    width: 100%;
    max-width: 400px;
    padding: 40px;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    background: white;
    text-align: left;
}

.login-header {
    text-align: center;
    margin-bottom: 32px;
}

.login-logo {
    font-size: 48px;
    color: var(--primary-color);
    margin-bottom: 16px;
}

.login-title {
    font-size: 24px;
    font-weight: 600;
    color: var(--text-color);
}

.login-desc {
    color: var(--text-secondary);
    margin-top: 8px;
}

/* Home Page */
.home-page {
    background-color: #fff;
}

.home-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 24px;
    height: 64px;
    border-bottom: 1px solid #f0f0f0;
    position: sticky;
    top: 0;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(8px);
    z-index: 1000;
}

.home-logo {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-color);
    display: flex;
    align-items: center;
    gap: 8px;
}

.hero {
    padding: 100px 24px;
    text-align: center;
    background: linear-gradient(135deg, #f5f7fa 0%, #e4e7eb 100%);
    margin-bottom: 60px;
}

.hero h1 {
    font-size: 48px;
    color: var(--text-color);
    margin-bottom: 24px;
    font-weight: 700;
}

.hero p {
    font-size: 20px;
    color: var(--text-secondary);
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

@media (max-width: 992px) {
    .grid-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .grid-3 { grid-template-columns: 1fr; }
    .hero h1 { font-size: 32px; }
}

.api-card {
    background: #fff;
    border: 1px solid #e8e8e8;
    border-radius: 8px;
    padding: 24px;
    transition: all 0.3s;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.api-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
    border-color: var(--primary-color);
}

.api-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-color);
}

.api-path {
    font-family: monospace;
    color: var(--primary-color);
    background: #e6f7ff;
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 12px;
    display: inline-block;
    margin-bottom: 16px;
}

.api-desc {
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: 24px;
    flex: 1;
    line-height: 1.6;
}

.footer {
    padding: 40px 0;
    text-align: center;
    color: var(--text-muted);
    border-top: 1px solid #f0f0f0;
    margin-top: 80px;
}