:root {
    --primary: #2563eb;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --bg: #f8fafc;
    --card-bg: white;
    --text: #1e293b;
    --text-light: #64748b;
    --border: #e2e8f0;
    --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 1rem;
}

header {
    text-align: center;
    margin-bottom: 3rem;
}

h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    color: var(--primary);
}

h2 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    color: var(--text);
}

.subtitle {
    color: var(--text-light);
    font-size: 1.1rem;
}

.navigation-section, .status-section, .data-section {
    background: var(--card-bg);
    border-radius: 0.75rem;
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: var(--shadow);
}

.nav-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.nav-card {
    padding: 2rem;
    border: 2px solid var(--border);
    border-radius: 0.75rem;
    background: var(--bg);
    text-decoration: none;
    color: var(--text);
    transition: all 0.3s;
    text-align: center;
}

.nav-card:hover {
    border-color: var(--primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.1);
}

.nav-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.nav-card h3 {
    color: var(--primary);
    margin-bottom: 0.5rem;
}

.nav-card p {
    color: var(--text-light);
    font-size: 0.9rem;
}

.status-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.status-card {
    padding: 1.5rem;
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    background: var(--bg);
}

.status-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    font-weight: 500;
}

.service-status {
    font-size: 0.875rem;
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    background: var(--border);
}

.service-status.connected {
    background: #dcfce7;
    color: var(--success);
}

.service-status.error {
    background: #fee2e2;
    color: var(--danger);
}

.btn-secondary {
    width: 100%;
    padding: 0.75rem;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 0.5rem;
    cursor: pointer;
    font-size: 1rem;
    transition: opacity 0.2s;
}

.btn-secondary:hover {
    opacity: 0.9;
}

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

.item-card {
    padding: 1.5rem;
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    background: var(--bg);
}

.item-card h3 {
    margin-bottom: 0.5rem;
    color: var(--primary);
}

.item-card p {
    color: var(--text-light);
    margin-bottom: 1rem;
}

.item-card small {
    color: var(--text-light);
    font-size: 0.875rem;
}

footer {
    text-align: center;
    margin-top: 3rem;
    padding: 2rem 0;
    color: var(--text-light);
}