/* CSS Reset and Base Styles */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    /* Dark Theme (Default) */
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --bg-card: rgba(30, 41, 59, 0.8);
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    --accent-primary: #3b82f6;
    --accent-success: #10b981;
    --accent-warning: #f59e0b;
    --accent-danger: #ef4444;
    --border-color: #334155;
    --shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
}

[data-theme="light"] {
    --bg-primary: #f8fafc;
    --bg-secondary: #e2e8f0;
    --bg-tertiary: #cbd5e1;
    --bg-card: #ffffff;
    --text-primary: #0f172a;
    --text-secondary: #334155;
    --text-muted: #64748b;
    --border-color: #e2e8f0;
    --shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.05);
}

/* Base Styles */
html {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-primary);
}

body {
    min-height: 100vh;
    background: var(--bg-primary);
    transition: background-color 0.3s ease;
}

/* Loading Screen */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-primary);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--bg-tertiary);
    border-left: 4px solid var(--accent-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 16px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.hidden {
    display: none !important;
}

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

/* Header */
.app-header {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 24px;
    max-width: 1400px;
    margin: 0 auto;
}

.header-brand {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo {
    font-size: 24px;
}

.header-brand h1 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
}

.version {
    background: var(--accent-primary);
    color: white;
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 10px;
    font-weight: 600;
}

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

.server-status {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--text-secondary);
}

.status-indicator {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--accent-success);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.status-indicator.offline {
    background: var(--accent-danger);
}

.user-menu {
    display: flex;
    align-items: center;
    gap: 12px;
}

/* Navigation */
.app-nav {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
}

.nav-container {
    display: flex;
    gap: 4px;
    padding: 0 24px;
    max-width: 1400px;
    margin: 0 auto;
    overflow-x: auto;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 16px;
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    white-space: nowrap;
    border-bottom: 2px solid transparent;
}

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

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

/* Main Content */
.app-main {
    flex: 1;
    padding: 24px;
    max-width: 1400px;
    margin: 0 auto;
    width: 100%;
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

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

/* Grid Layout */
.grid-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
    margin-bottom: 24px;
}

/* Cards */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 24px;
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
}

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

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

.card-header h2 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
}

.last-updated {
    font-size: 12px;
    color: var(--text-muted);
}

/* Status Grid */
.status-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.status-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    background: var(--bg-secondary);
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.status-icon {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: 600;
}

.status-icon.cpu { background: rgba(59, 130, 246, 0.1); color: var(--accent-primary); }
.status-icon.memory { background: rgba(16, 185, 129, 0.1); color: var(--accent-success); }
.status-icon.storage { background: rgba(245, 158, 11, 0.1); color: var(--accent-warning); }
.status-icon.network { background: rgba(139, 92, 246, 0.1); color: #8b5cf6; }

.status-info {
    flex: 1;
}

.status-label {
    display: block;
    font-size: 12px;
    color: var(--text-muted);
    margin-bottom: 2px;
}

.status-value {
    display: block;
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.stat {
    text-align: center;
    padding: 16px;
    background: var(--bg-secondary);
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.stat-value {
    display: block;
    font-size: 24px;
    font-weight: 700;
    color: var(--accent-primary);
    margin-bottom: 4px;
}

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

/* Containers */
.containers-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.container-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    transition: all 0.2s;
}

.container-item:hover {
    border-color: var(--accent-primary);
}

.container-info {
    display: flex;
    align-items: center;
    gap: 12px;
}

.container-status {
    width: 8px;
    height: 8px;
    border-radius: 50%;
}

.container-status.running { background: var(--accent-success); }
.container-status.stopped { background: var(--accent-danger); }
.container-status.paused { background: var(--accent-warning); }

.container-name {
    font-weight: 500;
    color: var(--text-primary);
}

.container-image {
    font-size: 12px;
    color: var(--text-muted);
}

.container-actions {
    display: flex;
    gap: 4px;
}

/* System Information */
.info-grid {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.info-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 0;
    border-bottom: 1px solid var(--border-color);
}

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

.info-label {
    font-size: 14px;
    color: var(--text-secondary);
}

.info-value {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
}

/* Charts */
.chart-container {
    position: relative;
    height: 200px;
    width: 100%;
}

.chart-card .real-time {
    font-size: 12px;
    color: var(--accent-success);
    font-weight: 500;
}

/* Storage List */
.storage-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.storage-item {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding: 12px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
}

.storage-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.storage-mount {
    font-weight: 500;
    color: var(--text-primary);
}

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

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

.storage-progress {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-primary), #60a5fa);
    border-radius: 3px;
    transition: width 0.3s ease;
}

/* Tables */
.table-container {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

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

.containers-table th,
.containers-table td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.containers-table th {
    background: var(--bg-secondary);
    font-weight: 600;
    font-size: 14px;
    color: var(--text-secondary);
}

.containers-table td {
    font-size: 14px;
    color: var(--text-primary);
}

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

/* Logs */
.logs-card {
    padding: 0;
    overflow: hidden;
}

.logs-container {
    height: 600px;
    overflow: auto;
}

.logs-content {
    padding: 24px;
    margin: 0;
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: 12px;
    line-height: 1.4;
    color: var(--text-secondary);
    background: var(--bg-primary);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border: 1px solid var(--border-color);
    background: var(--bg-secondary);
    color: var(--text-primary);
    border-radius: 6px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
}

.btn:hover {
    background: var(--bg-tertiary);
    transform: translateY(-1px);
}

.btn:active {
    transform: translateY(0);
}

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

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

.btn-primary:hover {
    background: #2563eb;
    border-color: #2563eb;
}

.btn-success {
    background: var(--accent-success);
    border-color: var(--accent-success);
    color: white;
}

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

.btn-outline {
    background: transparent;
    border-color: var(--border-color);
}

.btn-outline:hover {
    background: var(--bg-tertiary);
}

/* Forms */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-weight: 500;
    color: var(--text-primary);
    font-size: 14px;
}

.input {
    width: 100%;
    padding: 10px 12px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-primary);
    font-size: 14px;
    transition: all 0.2s;
}

.input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.select {
    width: 100%;
    padding: 10px 12px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-primary);
    font-size: 14px;
    cursor: pointer;
}

.help-text {
    display: block;
    margin-top: 4px;
    font-size: 12px;
    color: var(--text-muted);
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    font-size: 14px;
}

.checkbox-label input {
    display: none;
}

.checkmark {
    width: 18px;
    height: 18px;
    border: 2px solid var(--border-color);
    border-radius: 4px;
    position: relative;
    transition: all 0.2s;
}

.checkbox-label input:checked + .checkmark {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
}

.checkbox-label input:checked + .checkmark::after {
    content: '';
    position: absolute;
    left: 4px;
    top: 1px;
    width: 6px;
    height: 10px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

/* Headers */
.containers-header,
.logs-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
}

.containers-header h2,
.logs-header h2 {
    font-size: 24px;
    font-weight: 600;
    color: var(--text-primary);
}

.container-actions,
.logs-controls {
    display: flex;
    gap: 8px;
}

/* Empty States */
.empty-state {
    text-align: center;
    padding: 40px 20px;
    color: var(--text-muted);
}

.empty-state p {
    margin: 0;
    font-size: 14px;
}

/* Toast Notifications */
.toast-container {
    position: fixed;
    top: 24px;
    right: 24px;
    z-index: 1000;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.toast {
    padding: 12px 16px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    box-shadow: var(--shadow);
    display: flex;
    align-items: center;
    gap: 8px;
    animation: slideIn 0.3s ease;
}

.toast.success {
    border-left: 4px solid var(--accent-success);
}

.toast.error {
    border-left: 4px solid var(--accent-danger);
}

.toast.warning {
    border-left: 4px solid var(--accent-warning);
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    .header-content {
        padding: 12px 16px;
        flex-direction: column;
        gap: 12px;
        align-items: flex-start;
    }
    
    .header-actions {
        width: 100%;
        justify-content: space-between;
    }
    
    .app-main {
        padding: 16px;
    }
    
    .grid-container {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    
    .status-grid,
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .nav-container {
        padding: 0 16px;
    }
    
    .containers-header,
    .logs-header {
        flex-direction: column;
        gap: 16px;
        align-items: flex-start;
    }
    
    .container-actions,
    .logs-controls {
        width: 100%;
        flex-wrap: wrap;
    }
    
    .table-container {
        overflow-x: auto;
    }
    
    .containers-table {
        min-width: 600px;
    }
}

@media (max-width: 480px) {
    .card {
        padding: 16px;
    }
    
    .status-item {
        flex-direction: column;
        text-align: center;
        gap: 8px;
    }
    
    .btn {
        padding: 8px 12px;
        font-size: 12px;
    }
}

/* Utility Classes */
.text-success { color: var(--accent-success); }
.text-warning { color: var(--accent-warning); }
.text-danger { color: var(--accent-danger); }
.text-muted { color: var(--text-muted); }

.bg-success { background: var(--accent-success); }
.bg-warning { background: var(--accent-warning); }
.bg-danger { background: var(--accent-danger); }

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--bg-tertiary);
    border-radius: 3px;
}

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