:root {
    --primary-amber: #f59e0b;
    --primary-orange: #f97316;
    --bg-darker: #0c0c0e;
    --bg-surface-1: #16161a;
    --bg-surface-2: #1e1e24;
    --text-primary: #ffffff;
    --text-muted: #8e8e93;
    --border-color: rgba(255, 255, 255, 0.1);
    --accent-glow: rgba(245, 158, 11, 0.2);
}

body {
    background-color: var(--bg-darker);
    color: var(--text-primary);
    font-family: 'Inter', -apple-system, sans-serif;
    margin: 0; padding: 0;
}

.recharge-container {
    max-width: 1000px;
    margin: 40px auto;
    padding: 0 20px;
}

.checkout-header {
    margin-bottom: 40px;
    text-align: center;
}

.checkout-header h1 { font-size: 2.5rem; font-weight: 800; margin-bottom: 10px; }
.checkout-header p { color: var(--text-muted); }

.checkout-layout {
    display: grid;
    grid-template-columns: 1fr 340px;
    gap: 30px;
}

/* Steps & Selection */
.checkout-section {
    background: var(--bg-surface-1);
    border-radius: 24px;
    padding: 30px;
    border: 1px solid var(--border-color);
    margin-bottom: 20px;
}

.section-title {
    display: flex; align-items: center; gap: 12px;
    margin-bottom: 25px; font-size: 1.25rem; font-weight: 700;
}

.step-number {
    width: 28px; height: 28px; background: var(--primary-amber);
    color: #000; border-radius: 50%; display: flex; justify-content: center; align-items: center;
    font-size: 0.9rem; font-weight: bold;
}

/* Product Grid */
.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 15px;
}

.product-item {
    background: var(--bg-surface-2);
    border: 2px solid transparent;
    border-radius: 16px; padding: 20px 15px; text-align: center;
    cursor: pointer; transition: 0.3s;
    position: relative;
}

.product-item:hover { transform: translateY(-3px); background: #25252d; }
.product-item.active { border-color: var(--primary-amber); background: var(--accent-glow); }

.item-badge {
    position: absolute; top: -10px; right: 10px;
    background: var(--primary-orange); font-size: 0.7rem; font-weight: bold;
    padding: 2px 8px; border-radius: 4px;
}

.item-diamonds { font-size: 1.5rem; font-weight: 800; display: block; margin-bottom: 5px; }
.item-price { color: var(--text-muted); font-size: 0.9rem; }

/* Payment Methods */
.payment-grid {
    display: grid; grid-template-columns: 1fr 1fr; gap: 15px;
}

.payment-method {
    background: var(--bg-surface-2);
    border: 2px solid transparent; border-radius: 16px;
    padding: 20px; display: flex; align-items: center; gap: 15px;
    cursor: pointer; transition: 0.2s;
}

.payment-method:hover { background: #25252d; }
.payment-method.active { border-color: var(--primary-amber); background: var(--accent-glow); }

.pm-icon { font-size: 24px; color: var(--primary-amber); }
.pm-label { font-weight: 600; }

/* Summary Sidebar */
.summary-card {
    background: var(--bg-surface-1);
    border-radius: 24px; padding: 30px; border: 1px solid var(--border-color);
    position: sticky; top: 100px;
}

.summary-row {
    display: flex; justify-content: space-between; margin-bottom: 15px;
    color: var(--text-muted);
}

.total-row {
    border-top: 1px solid var(--border-color);
    padding-top: 20px; margin-top: 20px;
    display: flex; justify-content: space-between; align-items: center;
}

.total-price { font-size: 1.8rem; font-weight: 800; color: var(--primary-amber); }

.pay-now-btn {
    width: 100%; padding: 18px; margin-top: 30px;
    background: linear-gradient(135deg, var(--primary-amber), var(--primary-orange));
    border: none; border-radius: 16px; color: #000; font-weight: 800; font-size: 1.1rem;
    cursor: pointer; transition: 0.3s;
}

.pay-now-btn:disabled { opacity: 0.5; cursor: not-allowed; }
.pay-now-btn:hover:not(:disabled) { transform: scale(1.02); filter: brightness(1.1); }

@media (max-width: 800px) {
    .checkout-layout { grid-template-columns: 1fr; }
    .summary-card { position: static; margin-top: 20px; }
}