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

:root {
    --primary: #2563eb;
    --primary-dark: #1e40af;
    --secondary: #64748b;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --light: #f8fafc;
    --border: #e2e8f0;
    --text: #1e293b;
    --text-light: #64748b;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: #f1f5f9;
    color: var(--text);
    line-height: 1.6;
}

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

/* SIDEBAR */
.sidebar {
    width: 280px;
    background: white;
    border-right: 1px solid var(--border);
    padding: 2rem 0;
    position: fixed;
    left: 0;
    top: 0;
    height: 100vh;
    overflow-y: auto;
    box-shadow: 2px 0 8px rgba(0,0,0,0.08);
}

.sidebar-header {
    padding: 0 1.5rem 2rem;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.sidebar-header h2 {
    font-size: 1.5rem;
    color: var(--primary);
}

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

.nav-list {
    list-style: none;
    padding: 0;
}

.nav-list li {
    margin: 0;
}

.nav-list a {
    display: block;
    padding: 0.875rem 1.5rem;
    color: var(--text);
    text-decoration: none;
    border-left: 3px solid transparent;
    transition: all 0.2s ease;
    font-weight: 500;
}

.nav-list a:hover {
    background: var(--light);
    color: var(--primary);
    border-left-color: var(--primary);
}

.nav-list a.active {
    background: var(--light);
    color: var(--primary);
    border-left-color: var(--primary);
}

.menu-toggle {
    display: none;
    position: fixed;
    top: 1rem;
    left: 1rem;
    background: var(--primary);
    color: white;
    border: none;
    padding: 0.75rem 1rem;
    border-radius: 6px;
    cursor: pointer;
    font-size: 1rem;
    z-index: 1000;
}

/* MAIN CONTENT */
.content {
    margin-left: 280px;
    flex: 1;
    padding: 2rem;
}

.content-header {
    background: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.08);
    margin-bottom: 2rem;
}

.content-header h1 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
    color: var(--primary);
}

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

/* SECTIONS */
section {
    background: white;
    padding: 2rem;
    border-radius: 8px;
    margin-bottom: 2rem;
    box-shadow: 0 1px 3px rgba(0,0,0,0.08);
}

section h2 {
    margin-bottom: 1.5rem;
    color: var(--primary);
    font-size: 1.5rem;
    border-bottom: 2px solid var(--light);
    padding-bottom: 1rem;
}

section h3 {
    color: var(--text);
    font-size: 1.2rem;
    margin-top: 1.5rem;
    margin-bottom: 0.75rem;
}

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

section ul, section ol {
    margin-left: 1.5rem;
    margin-bottom: 1rem;
}

section li {
    margin-bottom: 0.75rem;
    color: var(--text-light);
}

/* CARDS */
.cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.card {
    background: var(--light);
    padding: 1.5rem;
    border-radius: 8px;
    border: 1px solid var(--border);
    transition: all 0.3s ease;
}

.card:hover {
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    transform: translateY(-2px);
}

.card h3 {
    margin-top: 0;
    font-size: 1.2rem;
}

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

.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    background: var(--primary);
    color: white;
    text-decoration: none;
    border-radius: 6px;
    transition: background 0.2s ease;
    font-weight: 500;
}

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

/* STATS */
.stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
}

.stat {
    text-align: center;
    padding: 1.5rem;
    background: var(--light);
    border-radius: 8px;
    border: 1px solid var(--border);
}

.stat .number {
    display: block;
    font-size: 2rem;
    font-weight: bold;
    color: var(--primary);
    margin-bottom: 0.5rem;
}

.stat .label {
    display: block;
    color: var(--text-light);
    font-size: 0.9rem;
}

/* ALERTS & BADGES */
.alert {
    padding: 1rem;
    border-radius: 6px;
    margin-bottom: 1rem;
    border-left: 4px solid;
}

.alert.warning {
    background: #fffbeb;
    border-left-color: var(--warning);
    color: #92400e;
}

.alert.danger {
    background: #fef2f2;
    border-left-color: var(--danger);
    color: #7f1d1d;
}

.alert.success {
    background: #f0fdf4;
    border-left-color: var(--success);
    color: #15803d;
}

.badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: var(--light);
    border: 1px solid var(--border);
    border-radius: 20px;
    font-size: 0.85rem;
    margin-right: 0.5rem;
    margin-bottom: 0.5rem;
}

.badge.new {
    background: #dbeafe;
    border-color: var(--primary);
    color: var(--primary);
}

.badge.critical {
    background: #fee2e2;
    border-color: var(--danger);
    color: var(--danger);
}

.badge.optional {
    background: #f0fdf4;
    border-color: var(--success);
    color: var(--success);
}

/* CODE BLOCKS */
code {
    background: var(--light);
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: 0.9rem;
    color: #d946ef;
}

pre {
    background: #1e293b;
    color: #e2e8f0;
    padding: 1rem;
    border-radius: 6px;
    overflow-x: auto;
    margin-bottom: 1rem;
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: 0.9rem;
}

pre code {
    background: none;
    color: #e2e8f0;
    padding: 0;
}

/* MOBILE RESPONSIVE */
@media (max-width: 768px) {
    .sidebar {
        position: fixed;
        left: -280px;
        transition: left 0.3s ease;
        z-index: 999;
    }

    .sidebar.active {
        left: 0;
    }

    .sidebar-header .close-btn {
        display: block;
    }

    .menu-toggle {
        display: block;
    }

    .content {
        margin-left: 0;
        padding: 1rem;
    }

    .content-header {
        padding: 1.5rem;
    }

    .content-header h1 {
        font-size: 1.5rem;
    }

    section {
        padding: 1.5rem;
    }

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

    .stats {
        grid-template-columns: repeat(2, 1fr);
    }
}

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

    .content-header h1 {
        font-size: 1.25rem;
    }

    section h2 {
        font-size: 1.25rem;
    }
}

/* SCROLLBAR */
.sidebar::-webkit-scrollbar {
    width: 6px;
}

.sidebar::-webkit-scrollbar-track {
    background: transparent;
}

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

.sidebar::-webkit-scrollbar-thumb:hover {
    background: var(--secondary);
}