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

:root {
    --primary: #667eea;
    --primary-dark: #5568d3;
    --secondary: #764ba2;
    --success: #43e97b;
    --danger: #f5576c;
    --warning: #f9ca24;
    --info: #4facfe;
    --dark: #1a1a2e;
    --darker: #16213e;
    --light: #f8f9fa;
    --border: #e1e8ed;
    --text: #2d3436;
    --text-light: #636e72;
    --shadow: rgba(0, 0, 0, 0.1);
    --sidebar-width: 260px;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: #f5f7fa;
    color: var(--text);
    line-height: 1.6;
}

.container {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    background: linear-gradient(180deg, var(--dark) 0%, var(--darker) 100%);
    color: white;
    padding: 2rem 0;
    position: fixed;
    height: 100vh;
    overflow-y: auto;
    z-index: 100;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0 2rem;
    margin-bottom: 3rem;
    font-size: 1.5rem;
    font-weight: 700;
}

.logo i {
    font-size: 2rem;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    padding: 0 1rem;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.875rem 1rem;
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    border-radius: 0.5rem;
    transition: all 0.3s;
}

.nav-item:hover {
    background: rgba(255, 255, 255, 0.1);
    color: white;
}

.nav-item.active {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: white;
}

.nav-item i {
    width: 20px;
    text-align: center;
}

.sidebar-footer {
    position: absolute;
    bottom: 2rem;
    left: 2rem;
    right: 2rem;
}

.status-indicator {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.7);
}

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

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

/* Main Content */
.main-content {
    margin-left: var(--sidebar-width);
    flex: 1;
    padding: 2rem;
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.header h1 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--dark);
}

.header-actions {
    display: flex;
    gap: 1rem;
}

/* Buttons */
.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 0.5rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}

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

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

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: white;
    border-radius: 1rem;
    padding: 1.5rem;
    display: flex;
    gap: 1.5rem;
    box-shadow: 0 2px 8px var(--shadow);
    transition: transform 0.3s;
}

.stat-card:hover {
    transform: translateY(-4px);
}

.stat-icon {
    width: 60px;
    height: 60px;
    border-radius: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: white;
}

.stat-content {
    flex: 1;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-light);
    margin-bottom: 0.5rem;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--dark);
}

/* Card */
.card {
    background: white;
    border-radius: 1rem;
    box-shadow: 0 2px 8px var(--shadow);
    margin-bottom: 2rem;
}

.card-header {
    padding: 1.5rem 2rem;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.card-header h2 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--dark);
}

.card-content {
    padding: 2rem;
}

/* Filters */
.filters {
    display: flex;
    gap: 0.5rem;
}

.filter-btn {
    padding: 0.5rem 1rem;
    border: 1px solid var(--border);
    background: white;
    border-radius: 0.5rem;
    cursor: pointer;
    transition: all 0.3s;
    font-size: 0.875rem;
}

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

/* Monitors List */
.monitors-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.monitor-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.25rem;
    border: 1px solid var(--border);
    border-radius: 0.75rem;
    transition: all 0.3s;
}

.monitor-item:hover {
    border-color: var(--primary);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.1);
}

.monitor-info {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex: 1;
}

.monitor-status {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.monitor-status.up {
    background: var(--success);
}

.monitor-status.down {
    background: var(--danger);
}

.monitor-status.unknown {
    background: var(--text-light);
}

.monitor-details h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.monitor-details p {
    font-size: 0.875rem;
    color: var(--text-light);
}

.monitor-metrics {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.metric {
    text-align: center;
}

.metric-label {
    font-size: 0.75rem;
    color: var(--text-light);
    margin-bottom: 0.25rem;
}

.metric-value {
    font-size: 1rem;
    font-weight: 600;
    color: var(--dark);
}

/* Data Table */
.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table th {
    text-align: left;
    padding: 1rem;
    font-weight: 600;
    color: var(--text-light);
    font-size: 0.875rem;
    border-bottom: 2px solid var(--border);
}

.data-table td {
    padding: 1rem;
    border-bottom: 1px solid var(--border);
}

.data-table tr:hover {
    background: var(--light);
}

.status-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.375rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.875rem;
    font-weight: 500;
}

.status-badge.up {
    background: rgba(67, 233, 123, 0.1);
    color: var(--success);
}

.status-badge.down {
    background: rgba(245, 87, 108, 0.1);
    color: var(--danger);
}

/* Probes Grid */
.probes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

.probe-card {
    padding: 1.5rem;
    border: 1px solid var(--border);
    border-radius: 0.75rem;
    transition: all 0.3s;
}

.probe-card:hover {
    border-color: var(--primary);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.1);
}

.probe-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.probe-id {
    font-weight: 600;
    color: var(--dark);
}

.probe-location {
    font-size: 0.875rem;
    color: var(--text-light);
    margin-bottom: 1rem;
}

.probe-stats {
    display: flex;
    justify-content: space-between;
    font-size: 0.875rem;
}

/* Blockchain Info */
.blockchain-info {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.info-item {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.info-item label {
    font-size: 0.875rem;
    color: var(--text-light);
    font-weight: 500;
}

.info-value {
    font-size: 1rem;
    color: var(--dark);
    font-family: 'Courier New', monospace;
    background: var(--light);
    padding: 0.75rem;
    border-radius: 0.5rem;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: white;
    border-radius: 1rem;
    width: 90%;
    max-width: 500px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.modal-header {
    padding: 1.5rem 2rem;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h2 {
    font-size: 1.25rem;
    font-weight: 600;
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-light);
}

.modal-body {
    padding: 2rem;
}

/* Form */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text);
    font-size: 0.875rem;
}

.form-group input[type="text"],
.form-group input[type="url"],
.form-group input[type="number"] {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    font-size: 0.875rem;
    transition: border-color 0.3s;
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary);
}

.form-group input[type="checkbox"] {
    margin-right: 0.5rem;
}

.form-actions {
    display: flex;
    gap: 1rem;
    justify-content: flex-end;
}

.search-input {
    padding: 0.75rem 1rem;
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    font-size: 0.875rem;
    width: 300px;
}

/* Pages */
.page {
    display: none;
}

.page.active {
    display: block;
}

/* Admin Panel */
.admin-section {
    padding: 2rem;
    background: var(--light);
    border-radius: 0.75rem;
    margin-bottom: 2rem;
}

.admin-section h3 {
    margin-bottom: 0.5rem;
    color: var(--dark);
}

.admin-section p {
    color: var(--text-light);
    margin-bottom: 1.5rem;
}

.install-result {
    margin-top: 1.5rem;
    padding: 1.5rem;
    background: white;
    border-radius: 0.5rem;
    border: 1px solid var(--border);
}

.install-result h4 {
    margin-bottom: 1rem;
    color: var(--dark);
}

.code-block {
    position: relative;
    background: var(--darker);
    color: #00ff00;
    padding: 1rem;
    border-radius: 0.5rem;
    font-family: 'Courier New', monospace;
    font-size: 0.875rem;
    overflow-x: auto;
    margin-bottom: 1rem;
}

.code-block code {
    display: block;
    white-space: pre-wrap;
    word-break: break-all;
}

.btn-copy {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    background: var(--primary);
    color: white;
    border: none;
    padding: 0.5rem 0.75rem;
    border-radius: 0.25rem;
    cursor: pointer;
    font-size: 0.875rem;
}

.btn-copy:hover {
    background: var(--primary-dark);
}

.help-text {
    font-size: 0.875rem;
    color: var(--text-light);
    margin-top: 0.5rem;
}

/* Chart Container */
.chart-container {
    margin-top: 2rem;
    height: 300px;
    position: relative;
}

.chart-canvas {
    width: 100%;
    height: 100%;
}

/* Action Buttons */
.action-buttons {
    display: flex;
    gap: 0.5rem;
}

.btn-icon {
    padding: 0.5rem;
    border: none;
    border-radius: 0.25rem;
    cursor: pointer;
    transition: all 0.3s;
    background: transparent;
    color: var(--text-light);
}

.btn-icon:hover {
    background: var(--light);
    color: var(--primary);
}

.btn-icon.danger:hover {
    background: rgba(245, 87, 108, 0.1);
    color: var(--danger);
}

/* Form Controls */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--dark);
    font-weight: 500;
}

.form-control {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    font-size: 1rem;
    transition: border-color 0.3s;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

/* Responsive */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .header {
        flex-direction: column;
        gap: 1rem;
        align-items: flex-start;
    }
    
    .probes-grid {
        grid-template-columns: 1fr;
    }
}