:root {
    --primary-color: #10B981;
    --primary-hover: #059669;
    --secondary-color: #4B5563;
    --light-bg: #F9FAFB;
    --border-color: #E5E7EB;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

/* Common Styles */
.investment-plans, .payment-page {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

/* Plan Cards */
.plans-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.plan-card {
    background: white;
    border-radius: 0.75rem;
    padding: 1.5rem;
    box-shadow: var(--shadow);
    transition: transform 0.2s ease;
    border: 1px solid var(--border-color);
}

.plan-card:hover {
    transform: translateY(-4px);
}

.plan-card h3 {
    color: var(--primary-color);
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.plan-details p {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.75rem;
    color: var(--secondary-color);
}

.plan-details strong {
    color: var(--secondary-color);
}

/* Payment Page Styles */
.payment-options h3 {
    color: var(--primary-color);
    margin-bottom: 1.5rem;
}

.payment-options .card {
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    transition: all 0.2s ease;
    cursor: pointer;
}

.payment-options .card:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow);
}

.payment-options .card.selected {
    border-color: var(--primary-color);
    background-color: var(--light-bg);
}

.qr-code {
    background: white;
    padding: 2rem;
    border-radius: 0.75rem;
    box-shadow: var(--shadow);
}

.payment-icons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-top: 1rem;
}

.payment-icons svg {
    height: 30px;
    width: auto;
}

/* Buttons */
.button.button-primary {
    background-color: var(--primary-color);
    color: white;
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    border: none;
    cursor: pointer;
    transition: background-color 0.2s ease;
    width: 100%;
    text-align: center;
    margin-top: 1rem;
}

.button.button-primary:hover {
    background-color: var(--primary-hover);
}

/* Responsive Design */
@media (max-width: 768px) {
    .plans-grid {
        grid-template-columns: 1fr;
    }

    .payment-options .card {
        margin-bottom: 1rem;
    }
}