:root {
    --bg-primary: #0a0a0a;
    --bg-secondary: #111111;
    --bg-tertiary: #1a1a1a;
    --bg-quaternary: #222222;
    --bg-card: #161616;
    
    --accent-primary: #00ff41;
    --accent-secondary: #ff0080;
    --accent-blue: #00a8ff;
    --accent-orange: #ff6b35;
    --accent-red: #ff4757;
    --accent-yellow: #ffa502;
    
    --text-primary: #ffffff;
    --text-secondary: #a3a3a3;
    --text-muted: #666666;
    --text-success: #10b981;
    --text-danger: #ef4444;
    
    --border: #2a2a2a;
    --border-light: #333333;
    --shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
    --shadow-heavy: 0 8px 40px rgba(0, 0, 0, 0.5);
    
    --radius: 12px;
    --radius-lg: 16px;
    --spacing: 20px;
    --sidebar-width: 280px;
    --header-height: 70px;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    overflow-x: hidden;
    line-height: 1.5;
}

/* Layout */
.app {
    display: grid;
    grid-template-areas: 
        "sidebar header"
        "sidebar main";
    grid-template-columns: var(--sidebar-width) 1fr;
    grid-template-rows: var(--header-height) 1fr;
    min-height: 100vh;
}

/* Header */
.header {
    grid-area: header;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--spacing);
    backdrop-filter: blur(20px);
    z-index: 100;
}

.header-left {
    display: flex;
    align-items: center;
    gap: var(--spacing);
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 20px;
    cursor: pointer;
    padding: 8px;
}

.page-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--accent-primary);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.search-bar {
    position: relative;
    display: flex;
    align-items: center;
}

.search-input {
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 12px 16px 12px 44px;
    color: var(--text-primary);
    font-size: 14px;
    width: 300px;
    transition: all 0.3s ease;
}

.search-input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(0, 255, 65, 0.1);
}

.search-icon {
    position: absolute;
    left: 16px;
    color: var(--text-muted);
}

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

.notification-btn, .profile-btn {
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 12px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.3s ease;
}

.notification-btn:hover, .profile-btn:hover {
    background: var(--bg-quaternary);
    color: var(--accent-primary);
    transform: translateY(-1px);
}

/* Sidebar */
.sidebar {
    grid-area: sidebar;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border);
    padding: var(--spacing);
    overflow-y: auto;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 40px;
    padding: 0 16px;
    background: var(--accent-primary);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
}

.logo-icon {
    font-size: 24px;
    color: var(--bg-primary);
}

.logo-text {
    font-size: 20px;
    font-weight: 800;
    color: var(--bg-primary);
    letter-spacing: 1px;
}

.nav-menu {
    list-style: none;
    margin-bottom: 40px;
}

.nav-item {
    margin-bottom: 8px;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px 20px;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--radius);
    transition: all 0.3s ease;
    font-weight: 500;
    position: relative;
    overflow: hidden;
}

.nav-link::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: 4px;
    background: var(--accent-primary);
    transform: scaleY(0);
    transition: transform 0.3s ease;
}

.nav-link:hover, .nav-link.active {
    background: var(--bg-tertiary);
    color: var(--accent-primary);
    transform: translateX(4px);
}

.nav-link:hover::before, .nav-link.active::before {
    transform: scaleY(1);
}

.nav-icon {
    font-size: 18px;
    width: 20px;
    text-align: center;
}

.nav-badge {
    background: var(--accent-secondary);
    color: white;
    font-size: 11px;
    padding: 2px 8px;
    border-radius: 12px;
    margin-left: auto;
    font-weight: 600;
}

/* Main Content */
.main-content {
    grid-area: main;
    padding: var(--spacing);
    overflow-y: auto;
    background: var(--bg-primary);
}

.page-container {
    max-width: 1400px;
    margin: 0 auto;
}

.page {
    display: none;
    animation: fadeIn 0.3s ease;
}

.page.active {
    display: block;
}

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

/* Card Headers */
.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
    padding: 8px;
    padding-bottom: 16px;
    padding-left: 12px;
    border-bottom: 1px solid var(--border);
}

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

.header-actions {
    display: flex;
    gap: 12px;
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing);
    margin-bottom: 30px;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 24px;
    position: relative;
    overflow: hidden;
    transition: all 0.3s ease;
}

.stat-card:hover {
    box-shadow: var(--shadow-heavy);
    transform: translateY(-2px);
    /*border-color: var(--accent-primary);*/
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--accent-primary);
}

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

.stat-title {
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.stat-icon {
    background: var(--accent-primary);
    color: var(--bg-primary);
    padding: 8px;
    border-radius: 8px;
    font-size: 16px;
}

.stat-value {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.stat-change {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
}

/* Content Grid */
.content-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--spacing);
    margin-bottom: 30px;
}

.chart-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 24px;
    box-shadow: var(--shadow);
}

/* Activity Feed */
.activity-feed {
    max-height: 400px;
    overflow-y: auto;
}

.activity-item {
    display: flex;
    align-items: start;
    gap: 16px;
    padding: 16px 0;
    border-bottom: 1px solid var(--border);
}

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

.activity-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--accent-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--bg-primary);
    font-size: 16px;
    flex-shrink: 0;
}

.activity-content {
    flex: 1;
}

.activity-text {
    color: var(--text-secondary);
    margin-bottom: 4px;
    line-height: 1.4;
}

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

/* Quick Actions */
.quick-actions {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.action-btn {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px 20px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text-secondary);
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
}

.action-btn:hover {
    background: var(--bg-quaternary);
    color: var(--accent-primary);
    /*border-color: var(--accent-primary);*/
    transform: translateX(4px);
}

/* Instance Types */
.instance-types {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing);
    margin-bottom: 30px;
}

.type-card {
    background: var(--bg-card);
    border: 2px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 24px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
}

.type-card:hover {
    /*border-color: var(--accent-primary);*/
    transform: translateY(-4px);
    box-shadow: var(--shadow-heavy);
}

.type-icon {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: var(--accent-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px auto;
    font-size: 24px;
    color: var(--bg-primary);
}

.type-card h3 {
    transition: all 0.3s ease;
    color: var(--text-primary);
    margin-bottom: 8px;
    font-size: 18px;
}

.type-card:hover h3 {
    color: var(--accent-primary);
}

.type-card p {
    color: var(--text-secondary);
    font-size: 14px;
}

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

.table-filters {
    padding: 16px;
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--border);
    display: flex;
    gap: 16px;
    align-items: center;
}

.filter-input, .filter-select {
    background: var(--bg-quaternary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 8px 12px;
    color: var(--text-primary);
    font-size: 14px;
}

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

.table th {
    background: var(--bg-tertiary);
    padding: 16px;
    text-align: left;
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-bottom: 1px solid var(--border);
}

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

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

.empty-state {
    text-align: center;
    color: var(--text-muted);
    font-style: italic;
    padding: 40px;
}

/* Status Badges */
.status-badge {
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
}

.status-active {
    background: rgba(16, 185, 129, 0.2);
    color: var(--text-success);
}

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

.status-pending {
    background: rgba(245, 158, 11, 0.2);
    color: var(--accent-yellow);
}

.status-running {
    background: rgba(0, 255, 65, 0.2);
    color: var(--accent-primary);
}

.status-stopped {
    background: rgba(166, 166, 166, 0.2);
    color: var(--text-muted);
}

/* Forms */
.form-group {
    margin-bottom: 24px;
}

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

.form-input, .form-select {
    width: 100%;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 12px 16px;
    color: var(--text-primary);
    font-size: 14px;
    transition: all 0.3s ease;
}

.form-input:focus, .form-select:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(0, 255, 65, 0.1);
}

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

.input-group {
    display: flex;
    gap: 12px;
}

/* Buttons */
.btn {
    background: var(--accent-primary);
    color: var(--bg-primary);
    border: none;
    padding: 12px 24px;
    border-radius: var(--radius);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 14px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn:hover {
    background: var(--accent-blue);
    transform: translateY(-1px);
    box-shadow: var(--shadow);
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    border: 1px solid var(--border);
    padding: 12px 24px;
    border-radius: var(--radius);
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 14px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn-secondary:hover {
    background: var(--bg-quaternary);
    color: var(--accent-primary);
    border-color: var(--accent-primary);
}

.btn-danger {
    background: var(--accent-red);
    color: white;
    border: none;
}

.btn-danger:hover {
    background: #e74c3c;
}

/* Settings Grid */
.settings-grid, .profile-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing);
}

.time-filter {
    display: flex;
    align-items: center;
    gap: 12px;
}

/* Contact */
.contact-container {
    max-width: 800px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.contact-item {
    display: flex;
    align-items: start;
    gap: 20px;
    padding: 20px;
    background: var(--bg-tertiary);
    border-radius: var(--radius);
}

.contact-icon {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--accent-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    color: var(--bg-primary);
    flex-shrink: 0;
}

.contact-details h4 {
    color: var(--text-primary);
    margin-bottom: 4px;
}

.contact-details p {
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.contact-link {
    color: var(--accent-primary);
    text-decoration: none;
    font-weight: 500;
}

.contact-link:hover {
    color: var(--accent-blue);
}

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

/* Modals */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    animation: modalFadeIn 0.3s ease;
}

.modal.show {
    display: flex;
}

@keyframes modalFadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.modal-content {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    width: 90%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
    animation: modalSlideIn 0.3s ease;
}

@keyframes modalSlideIn {
    from { transform: translateY(-50px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

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

.modal-header h3 {
    color: var(--text-primary);
    margin: 0;
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 20px;
    cursor: pointer;
    padding: 4px;
    border-radius: 4px;
    transition: all 0.3s ease;
}

.modal-close:hover {
    background: var(--bg-tertiary);
    color: var(--accent-red);
}

.modal-body {
    padding: 24px;
}

.modal-footer {
    display: flex;
    gap: 12px;
    justify-content: flex-end;
    padding: 24px;
    border-top: 1px solid var(--border);
}

/* Account Selector */
.account-selector {
    max-height: 200px;
    overflow-y: auto;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--bg-tertiary);
}

.account-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    border-bottom: 1px solid var(--border);
    cursor: pointer;
    transition: all 0.3s ease;
}

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

.account-item:hover {
    background: var(--bg-quaternary);
}

.account-item input[type="checkbox"] {
    margin: 0;
}

.account-info {
    flex: 1;
}

.account-username {
    color: var(--text-primary);
    font-weight: 500;
}

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

/* Loading */
.loading {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--text-muted);
    padding: 20px;
    justify-content: center;
}

.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 2000;
}

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

.loading-spinner {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 40px;
    text-align: center;
    color: var(--text-primary);
}

.loading-spinner i {
    font-size: 32px;
    color: var(--accent-primary);
    margin-bottom: 16px;
}

/* Toast Notifications */
.toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 3000;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.toast {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-left: 4px solid var(--accent-primary);
    border-radius: var(--radius);
    padding: 16px 20px;
    min-width: 300px;
    box-shadow: var(--shadow-heavy);
    animation: toastSlideIn 0.3s ease;
}

.toast.success {
    border-left-color: var(--text-success);
}

.toast.error {
    border-left-color: var(--accent-red);
}

.toast.warning {
    border-left-color: var(--accent-yellow);
}

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

.toast-content {
    display: flex;
    align-items: start;
    gap: 12px;
}

.toast-icon {
    flex-shrink: 0;
    font-size: 16px;
}

.toast-message {
    flex: 1;
}

.toast-title {
    color: var(--text-primary);
    font-weight: 600;
    margin-bottom: 4px;
}

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

.toast-close {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 0;
    margin-left: 12px;
}

/* Progress Bars */
.progress-bar {
    width: 100%;
    height: 8px;
    background: var(--bg-tertiary);
    border-radius: 4px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: var(--accent-primary);
    border-radius: 4px;
    transition: width 0.3s ease;
}

/* Responsive */
@media (max-width: 768px) {
    .app {
        grid-template-areas: 
            "header"
            "main";
        grid-template-columns: 1fr;
        grid-template-rows: var(--header-height) 1fr;
    }

    .menu-toggle {
        display: block !important;
    }

    .sidebar {
        position: fixed;
        left: -100%;
        top: 0;
        height: 100vh;
        z-index: 1000;
        transition: left 0.3s ease;
        width: var(--sidebar-width);
    }

    .sidebar.open {
        left: 0;
    }

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

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

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

    .instance-types {
        grid-template-columns: 1fr;
    }

    .search-input {
        width: 200px;
    }

    .table-filters {
        flex-direction: column;
        align-items: stretch;
    }

    .modal-content {
        width: 95%;
        margin: 20px;
    }

    .toast {
        min-width: 250px;
    }

    .toast-container {
        left: 20px;
        right: 20px;
    }
}

@media (max-width: 480px) {
    .search-input {
        width: 150px;
    }
    
    .header-right {
        gap: 8px;
    }
    
    .table {
        font-size: 12px;
    }
    
    .table th, .table td {
        padding: 8px;
    }
}