/* Global Premium Design System */
:root {
    --bg-dark: #0f1115;
    --bg-panel: #161920;
    --bg-card: #1f2937;
    --text-main: #f3f4f6;
    --text-muted: #9ca3af;
    --accent: #3b82f6;
    --accent-hover: #2563eb;
    --accent-glow: rgba(59, 130, 246, 0.5);
    --error: #ef4444;
    --success: #10b981;
    --warning: #f59e0b;
    --border-color: rgba(255, 255, 255, 0.1);
}

body, html {
    margin: 0;
    padding: 0;
    width: 100%;
    height: 100%;
    background-color: var(--bg-dark);
    color: var(--text-main);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

/* Base Styles */
h1, h2, h3, h4 {
    margin-top: 0;
    font-weight: 700;
}

a {
    color: var(--accent);
    text-decoration: none;
    transition: color 0.2s;
}

a:hover {
    color: var(--accent-hover);
}

.btn {
    display: inline-block;
    background-color: var(--accent);
    color: #fff;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: all 0.2s ease;
    box-shadow: 0 4px 14px 0 rgba(59, 130, 246, 0.39);
}

.btn:hover {
    background-color: var(--accent-hover);
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(59, 130, 246, 0.23);
}

.card {
    background-color: var(--bg-panel);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

/* Tabs System */
.tabs-nav {
    display: flex;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 1.5rem;
    gap: 1rem;
}

.tab-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    padding: 0.75rem 1rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: all 0.2s ease;
}

.tab-btn:hover {
    color: var(--text-main);
}

.tab-btn.active {
    color: var(--accent);
    border-bottom-color: var(--accent);
}

.tab-content {
    display: none;
    animation: fadeIn 0.3s ease-out;
}

.tab-content.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(5px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Print Styles for PDF Download */
@media print {
    body {
        background-color: white !important;
        color: black !important;
        padding: 0;
    }
    .btn, .tabs-nav {
        display: none !important;
    }
    .card {
        box-shadow: none;
        border: none;
    }
    .tab-content {
        display: block !important;
        page-break-inside: avoid;
    }
    .overarching-summary {
        background: #f8fafc !important;
        color: black !important;
        border-left: 4px solid black !important;
    }
    .paywall-overlay {
        display: none !important;
    }
    .pro-locked {
        filter: none !important;
        color: black !important;
    }
}