.payment-container {
    max-width: 800px;
    margin: 4rem auto;
    padding: 3rem 2rem;
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.payment-header {
    text-align: center;
    margin-bottom: 3rem;
}

.payment-header h1 {
    font-size: 2rem;
    font-weight: 600;
    color: #1f2937;
    margin-bottom: 0.5rem;
}

.payment-header p {
    color: #6b7280;
    font-size: 1rem;
}

.payment-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group.full-width {
    grid-column: 1 / -1;
}

.form-group label {
    font-weight: 500;
    color: #374151;
    font-size: 0.9rem;
}

.form-group label .required {
    color: #ef4444;
    margin-left: 2px;
}

.form-group input,
.form-group textarea {
    padding: 0.875rem 1rem;
    border: 1px solid #d1d5db;
    border-radius: 8px;
    font-family: 'Poppins', sans-serif;
    font-size: 0.95rem;
    transition: all 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(30, 64, 175, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.amount-input-wrapper {
    position: relative;
}

.amount-input-wrapper input {
    padding-left: 2.5rem;
}

.amount-input-wrapper .currency-symbol {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: #6b7280;
    font-weight: 500;
}

.payment-info {
    background: #f0f9ff;
    border: 1px solid #bfdbfe;
    border-radius: 8px;
    padding: 1rem;
    margin-top: 1rem;
    display: flex;
    gap: 0.75rem;
}

.payment-info i {
    color: #3b82f6;
    font-size: 1.25rem;
    margin-top: 2px;
}

.payment-info-text {
    flex: 1;
}

.payment-info-text h3 {
    font-size: 0.95rem;
    font-weight: 600;
    color: #1e40af;
    margin-bottom: 0.25rem;
}

.payment-info-text p {
    font-size: 0.85rem;
    color: #1e40af;
    line-height: 1.5;
}

.submit-btn {
    background: var(--primary-color);
    color: #fff;
    padding: 1rem 2rem;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-top: 1rem;
}

.submit-btn:hover {
    background: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(30, 64, 175, 0.3);
}

.submit-btn i {
    margin-right: 0.5rem;
}

.alert {
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.alert-success {
    background: #f0fdf4;
    border: 1px solid #bbf7d0;
    color: #166534;
}

.alert-error {
    background: #fef2f2;
    border: 1px solid #fecaca;
    color: #991b1b;
}

.alert i {
    font-size: 1.25rem;
}

@media (max-width: 768px) {
    .payment-container {
        margin: 2rem 1rem;
        padding: 2rem 1.5rem;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .payment-header h1 {
        font-size: 1.5rem;
    }
}