:root { --primary: #00B55E; --bg: #f3f4f6; --text: #374151; --white: #ffffff; --border: #e5e7eb; }
* { box-sizing: border-box; margin: 0; padding: 0; font-family: 'Inter', sans-serif; }
body { background-color: var(--bg); color: var(--text); }
.checkout-container { display: flex; max-width: 1000px; margin: 40px auto; gap: 20px; padding: 0 20px; }
.col { background: var(--white); border-radius: 8px; padding: 30px; box-shadow: 0 4px 6px -1px rgba(0,0,0,0.1); }
.left-col { flex: 1; height: fit-content; }
.right-col { flex: 1.5; }
.product-img { width: 100%; border-radius: 8px; margin-bottom: 20px; background: #eee; aspect-ratio: 16/9; object-fit: cover; }
.product-title { font-size: 1.5rem; font-weight: 700; color: #111827; margin-bottom: 10px; }
.product-price { font-size: 2rem; font-weight: 800; color: var(--primary); margin-bottom: 20px; }
.secure-badge { display: flex; align-items: center; gap: 10px; font-size: 0.875rem; color: #059669; background: #ecfdf5; padding: 10px; border-radius: 6px; }
.form-group { margin-bottom: 15px; }
label { display: block; font-size: 0.875rem; font-weight: 600; margin-bottom: 5px; color: #4b5563; }
input, select { width: 100%; padding: 12px; border: 1px solid var(--border); border-radius: 6px; outline: none; font-size: 1rem; }
input:focus, select:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(0, 181, 94, 0.2); }
.row { display: flex; gap: 15px; }
.row .form-group { flex: 1; }
.payment-methods { display: flex; gap: 10px; margin-bottom: 20px; }
.method { flex: 1; text-align: center; padding: 10px; border: 1px solid var(--border); border-radius: 6px; cursor: pointer; font-weight: 600; color: #6b7280;}
.method.active { border-color: var(--primary); background: #f0fdf4; color: var(--primary); }
.btn-buy { width: 100%; background: var(--primary); color: white; border: none; padding: 16px; font-size: 1.25rem; font-weight: 700; border-radius: 6px; cursor: pointer; transition: background 0.2s; margin-top: 20px; }
.btn-buy:hover { background: #00994f; }
@media (max-width: 768px) { .checkout-container { flex-direction: column; } }