/* ===== CSS VARIABLES ===== */
:root {
    /* Colors */
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --secondary: #0ea5e9;
    --success: #22c55e;
    --warning: #f59e0b;
    --danger: #ef4444;
    
    /* Dark Theme (Default) */
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --border: #334155;
    --card-bg: #1e293b;
    --hover-bg: #334155;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.3);
    
    /* Sizing */
    --sidebar-width: 260px;
    --header-height: 70px;
    --border-radius: 12px;
    --border-radius-sm: 8px;
}

/* Light Theme */
[data-theme="light"] {
    --bg-primary: #f8fafc;
    --bg-secondary: #ffffff;
    --bg-tertiary: #f1f5f9;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    --border: #e2e8f0;
    --card-bg: #ffffff;
    --hover-bg: #f1f5f9;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.05);
}

/* ===== RESET & BASE ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

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

/* ===== SIDEBAR ===== */
.sidebar {
    width: var(--sidebar-width);
    background-color: var(--bg-secondary);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    z-index: 1000;
    transition: transform 0.3s ease;
}

.sidebar-header {
    padding: 24px 20px;
    border-bottom: 1px solid var(--border);
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
}

.logo i {
    font-size: 1.8rem;
}

.tagline {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 4px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.sidebar-nav {
    flex: 1;
    padding: 16px 12px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    border-radius: var(--border-radius-sm);
    color: var(--text-secondary);
    text-decoration: none;
    transition: all 0.2s ease;
    position: relative;
}

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

.nav-item.active {
    background-color: var(--primary);
    color: white;
}

.nav-item i {
    width: 20px;
    text-align: center;
    font-size: 1.1rem;
}

.badge {
    position: absolute;
    right: 12px;
    background-color: var(--danger);
    color: white;
    font-size: 0.7rem;
    padding: 2px 6px;
    border-radius: 10px;
    min-width: 20px;
    text-align: center;
}

.sidebar-footer {
    padding: 20px;
    border-top: 1px solid var(--border);
}

.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    color: var(--text-muted);
}

.switch {
    position: relative;
    display: inline-block;
    width: 48px;
    height: 24px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--bg-tertiary);
    transition: 0.3s;
    border-radius: 24px;
}

.slider:before {
    position: absolute;
    content: "";
    height: 18px;
    width: 18px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    transition: 0.3s;
    border-radius: 50%;
}

input:checked + .slider {
    background-color: var(--primary);
}

input:checked + .slider:before {
    transform: translateX(24px);
}

/* ===== MAIN CONTENT ===== */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    min-height: 100vh;
}

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

.header-left {
    display: flex;
    align-items: center;
    gap: 16px;
}

.header-left h1 {
    font-size: 1.5rem;
    font-weight: 600;
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 8px;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 16px;
}

.search-box {
    position: relative;
}

.search-box i {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
}

.search-box input {
    padding: 10px 16px 10px 40px;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: var(--border-radius-sm);
    color: var(--text-primary);
    width: 250px;
    transition: all 0.2s ease;
}

.search-box input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

/* ===== BUTTONS ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    border-radius: var(--border-radius-sm);
    font-weight: 500;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.2s ease;
    border: none;
}

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

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border);
}

.btn-secondary:hover {
    background-color: var(--hover-bg);
}

.btn-danger {
    background-color: var(--danger);
    color: white;
}

.btn-danger:hover {
    background-color: #dc2626;
}

.btn-sm {
    padding: 6px 12px;
    font-size: 0.8rem;
}

/* ===== SECTIONS ===== */
.section {
    display: none;
    padding: 24px;
    animation: fadeIn 0.3s ease;
}

.section.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

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

.section-header h2 {
    font-size: 1.5rem;
    font-weight: 600;
}

/* ===== STATS GRID ===== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 20px;
    margin-bottom: 24px;
}

.stat-card {
    background-color: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 24px;
    display: flex;
    align-items: flex-start;
    gap: 16px;
    border: 1px solid var(--border);
    transition: all 0.2s ease;
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--border-radius-sm);
    background-color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.2rem;
}

.stat-icon.warning {
    background-color: var(--warning);
}

.stat-icon.success {
    background-color: var(--success);
}

.stat-info {
    flex: 1;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    display: block;
    margin-bottom: 4px;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    display: block;
    margin-bottom: 4px;
}

.stat-change {
    font-size: 0.8rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 4px;
}

.stat-change.positive {
    color: var(--success);
}

.stat-change.warning {
    color: var(--warning);
}

/* ===== CHART ===== */
.chart-container {
    background-color: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 24px;
    margin-bottom: 24px;
    border: 1px solid var(--border);
    max-height: 400px;
}

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

.chart-header h2 {
    font-size: 1.2rem;
    font-weight: 600;
}

.chart-filters {
    display: flex;
    gap: 8px;
}

.filter-btn {
    padding: 6px 12px;
    border-radius: 6px;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 0.8rem;
    transition: all 0.2s ease;
}

.filter-btn.active {
    background-color: var(--primary);
    color: white;
    border-color: var(--primary);
}

.filter-btn:hover:not(.active) {
    background-color: var(--hover-bg);
}

#cost-chart {
    max-height: 300px;
    width: 100%;
}

/* ===== ACTIVITY ===== */
.activity-container {
    background-color: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 24px;
    border: 1px solid var(--border);
}

.activity-container h2 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 16px;
}

.activity-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.activity-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    border-radius: var(--border-radius-sm);
    background-color: var(--bg-tertiary);
    transition: all 0.2s ease;
}

.activity-item:hover {
    background-color: var(--hover-bg);
}

.activity-icon {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9rem;
}

.activity-icon.cost {
    background-color: rgba(239, 68, 68, 0.2);
    color: var(--danger);
}

.activity-icon.alert {
    background-color: rgba(245, 158, 11, 0.2);
    color: var(--warning);
}

.activity-icon.success {
    background-color: rgba(34, 197, 94, 0.2);
    color: var(--success);
}

.activity-icon.info {
    background-color: rgba(99, 102, 241, 0.2);
    color: var(--primary);
}

.activity-content {
    flex: 1;
}

.activity-text {
    font-size: 0.9rem;
    color: var(--text-primary);
}

.activity-time {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 2px;
}

/* ===== AGENTS TABLE ===== */
.agents-table-container {
    background-color: var(--card-bg);
    border-radius: var(--border-radius);
    border: 1px solid var(--border);
    overflow: hidden;
}

.agents-table {
    width: 100%;
    border-collapse: collapse;
}

.agents-table th,
.agents-table td {
    padding: 16px 20px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

.agents-table th {
    background-color: var(--bg-tertiary);
    font-weight: 600;
    font-size: 0.85rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.agents-table tr:hover {
    background-color: var(--hover-bg);
}

.agents-table tr:last-child td {
    border-bottom: none;
}

.agent-name {
    display: flex;
    align-items: center;
    gap: 12px;
}

.agent-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background-color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
}

.agent-info h4 {
    font-weight: 500;
    margin-bottom: 2px;
}

.agent-info p {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.model-badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 500;
    background-color: var(--bg-tertiary);
    color: var(--text-secondary);
}

.cost-cell {
    font-weight: 600;
}

.budget-cell {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.budget-bar {
    height: 6px;
    background-color: var(--bg-tertiary);
    border-radius: 3px;
    overflow: hidden;
}

.budget-fill {
    height: 100%;
    border-radius: 3px;
    transition: width 0.3s ease;
}

.budget-fill.safe {
    background-color: var(--success);
}

.budget-fill.warning {
    background-color: var(--warning);
}

.budget-fill.danger {
    background-color: var(--danger);
}

.budget-text {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.status-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
}

.status-badge.running {
    background-color: rgba(34, 197, 94, 0.2);
    color: var(--success);
}

.status-badge.stopped {
    background-color: rgba(239, 68, 68, 0.2);
    color: var(--danger);
}

.status-badge.paused {
    background-color: rgba(245, 158, 11, 0.2);
    color: var(--warning);
}

.status-badge i {
    font-size: 0.6rem;
}

.actions-cell {
    display: flex;
    gap: 8px;
}

.action-btn {
    width: 32px;
    height: 32px;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s ease;
}

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

.action-btn.danger:hover {
    background-color: rgba(239, 68, 68, 0.2);
    color: var(--danger);
    border-color: var(--danger);
}

/* ===== BUDGETS GRID ===== */
.budgets-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
}

.budget-card {
    background-color: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 24px;
    border: 1px solid var(--border);
}

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

.budget-card-header h3 {
    font-size: 1.1rem;
    font-weight: 600;
}

.budget-card-header .model-badge {
    font-size: 0.7rem;
}

.budget-progress {
    margin-bottom: 16px;
}

.budget-progress-bar {
    height: 12px;
    background-color: var(--bg-tertiary);
    border-radius: 6px;
    overflow: hidden;
    margin-bottom: 8px;
}

.budget-progress-fill {
    height: 100%;
    border-radius: 6px;
    transition: width 0.3s ease;
}

.budget-progress-text {
    display: flex;
    justify-content: space-between;
    font-size: 0.85rem;
}

.budget-progress-text .spent {
    font-weight: 600;
}

.budget-progress-text .limit {
    color: var(--text-muted);
}

.budget-details {
    display: flex;
    justify-content: space-between;
    padding-top: 16px;
    border-top: 1px solid var(--border);
}

.budget-detail {
    text-align: center;
}

.budget-detail-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-bottom: 4px;
}

.budget-detail-value {
    font-size: 1.1rem;
    font-weight: 600;
}

/* ===== ALERTS ===== */
.alerts-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.alert-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    padding: 16px;
    border-radius: var(--border-radius);
    background-color: var(--card-bg);
    border: 1px solid var(--border);
    animation: slideIn 0.3s ease;
}

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

.alert-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    flex-shrink: 0;
}

.alert-icon.warning {
    background-color: rgba(245, 158, 11, 0.2);
    color: var(--warning);
}

.alert-icon.danger {
    background-color: rgba(239, 68, 68, 0.2);
    color: var(--danger);
}

.alert-icon.success {
    background-color: rgba(34, 197, 94, 0.2);
    color: var(--success);
}

.alert-content {
    flex: 1;
}

.alert-title {
    font-weight: 600;
    margin-bottom: 4px;
}

.alert-description {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.alert-time {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.alert-actions {
    display: flex;
    gap: 8px;
}

.alert-dismiss {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 4px;
    transition: color 0.2s ease;
}

.alert-dismiss:hover {
    color: var(--danger);
}

/* ===== SETTINGS ===== */
.settings-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 24px;
}

.settings-card {
    background-color: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 24px;
    border: 1px solid var(--border);
}

.settings-card h3 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 20px;
}

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

.form-group label {
    display: block;
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 8px;
    color: var(--text-secondary);
}

.form-group input[type="text"],
.form-group input[type="number"],
.form-group input[type="password"],
.form-group input[type="email"],
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: var(--border-radius-sm);
    color: var(--text-primary);
    font-size: 0.9rem;
    transition: all 0.2s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

.form-group textarea {
    min-height: 100px;
    resize: vertical;
}

.form-group input[type="checkbox"] {
    width: 18px;
    height: 18px;
    margin-right: 8px;
    accent-color: var(--primary);
}

.form-group label:has(input[type="checkbox"]) {
    display: flex;
    align-items: center;
    cursor: pointer;
}

.form-actions {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    margin-top: 24px;
}

/* ===== MODAL ===== */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 2000;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.2s ease;
}

.modal.active {
    display: flex;
}

.modal-content {
    background-color: var(--bg-secondary);
    border-radius: var(--border-radius);
    width: 100%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
    animation: scaleIn 0.2s ease;
}

@keyframes scaleIn {
    from { opacity: 0; transform: scale(0.95); }
    to { opacity: 1; transform: scale(1); }
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    border-bottom: 1px solid var(--border);
}

.modal-header h2 {
    font-size: 1.3rem;
    font-weight: 600;
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 4px;
    transition: color 0.2s ease;
}

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

.modal-content form {
    padding: 24px;
}

/* ===== EMPTY STATE ===== */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-muted);
}

.empty-state i {
    font-size: 3rem;
    margin-bottom: 16px;
    color: var(--text-muted);
}

.empty-state h3 {
    font-size: 1.2rem;
    margin-bottom: 8px;
    color: var(--text-secondary);
}

.empty-state p {
    font-size: 0.9rem;
    margin-bottom: 20px;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
    .sidebar {
        transform: translateX(-100%);
    }

    .sidebar.active {
        transform: translateX(0);
    }

    .main-content {
        margin-left: 0;
    }

    .menu-toggle {
        display: block;
    }

    .search-box input {
        width: 200px;
    }
}

@media (max-width: 768px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .header-right {
        gap: 8px;
    }

    .search-box {
        display: none;
    }

    .settings-grid {
        grid-template-columns: 1fr;
    }

    .budgets-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }

    .section {
        padding: 16px;
    }

    .stat-card {
        padding: 16px;
    }

    .stat-value {
        font-size: 1.5rem;
    }
}

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

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

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

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* ===== TOOLTIP ===== */
.tooltip {
    position: relative;
}

.tooltip::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    padding: 6px 12px;
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    font-size: 0.75rem;
    border-radius: 6px;
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: all 0.2s ease;
    margin-bottom: 8px;
}

.tooltip:hover::after {
    opacity: 1;
    visibility: visible;
}

/* ===== ANIMATIONS ===== */
@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.loading {
    animation: pulse 1.5s ease-in-out infinite;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.spinner {
    animation: spin 1s linear infinite;
}