:root {
    --primary: #4f46e5;
    --primary-light: #818cf8;
    --primary-dark: #3730a3;
    --primary-gradient: linear-gradient(135deg, #4f46e5, #7c3aed);
    --secondary: #64748b;
    --success: #10b981;
    --error: #ef4444;
    --warning: #f59e0b;
    --bg: #f1f5f9;
    --bg-card: #ffffff;
    --text: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    --border: #e2e8f0;
    --shadow: 0 20px 60px rgba(79,70,229,0.15);
    --shadow-hover: 0 25px 80px rgba(79,70,229,0.25);
    --radius: 16px;
    --radius-sm: 8px;
    --transition: 0.3s cubic-bezier(0.4,0,0.2,1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.7;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
    flex: 1;
    width: 100%;
}
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    padding: 0.9rem 2rem;
    border: none;
    border-radius: var(--radius-sm);
    font-size: clamp(0.9rem, 2vw, 1rem);
    font-weight: 600;
    font-family: 'Inter', sans-serif;
    cursor: pointer;
    transition: all var(--transition);
    min-height: 52px;
    min-width: 140px;
    text-decoration: none;
}
.btn-primary {
    background: var(--primary-gradient);
    color: #fff;
    box-shadow: 0 4px 20px rgba(79,70,229,0.35);
}
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 8px 30px rgba(79,70,229,0.45); }
.btn-secondary {
    background: var(--border);
    color: var(--text);
}
.btn-secondary:hover { background: var(--text-secondary); color: #fff; transform: translateY(-3px); }
.btn i { font-size: 1.1rem; }