:root {
    --primary: #2563eb;
    --dark: #1e293b;
    --light: #f8fafc;
    --danger: #ef4444;
}

body { font-family: 'Inter', sans-serif; background: #f1f5f9; margin: 0; color: #334155; }

.container { max-width: 900px; margin: 40px auto; background: white; padding: 30px; border-radius: 12px; box-shadow: 0 4px 15px rgba(0,0,0,0.05); }

/* Form Styles */
.form-group { margin-bottom: 15px; }
label { display: block; font-weight: bold; margin-bottom: 5px; font-size: 0.9rem; }
input, select, textarea { 
    width: 100%; padding: 10px; border: 1px solid #cbd5e1; border-radius: 6px; box-sizing: border-box; 
}

/* Button Styles */
.btn { padding: 10px 20px; border: none; border-radius: 6px; cursor: pointer; font-weight: 600; text-decoration: none; display: inline-block; transition: 0.2s; }
.btn-primary { background: var(--primary); color: white; }
.btn-primary:hover { background: #1d4ed8; }
.btn-danger { background: var(--danger); color: white; }

/* Table Styles */
table { width: 100%; border-collapse: collapse; margin: 20px 0; }
th { background: #f8fafc; padding: 12px; text-align: left; border-bottom: 2px solid #e2e8f0; font-size: 0.85rem; }
td { padding: 12px; border-bottom: 1px solid #f1f5f9; }

/* Responsive Grid for Result */
.rincian-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
}
@media (max-width: 600px) { .rincian-grid { grid-template-columns: 1fr; } }