.donation-checkout {
    background: linear-gradient(180deg, #f8fbff 0%, #ffffff 100%);
}

.donation-card {
    background: #ffffff;
    border-radius: 18px;
    padding: 40px;
    border: 1px solid #e8eef5;
}

.donation-card__header {
    margin-bottom: 30px;
    border-bottom: 1px solid #eef2f7;
    padding-bottom: 20px;
}

.donation-card__header h2 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 8px;
}

.donation-card__header p {
    color: #5d7288;
    margin: 0;
}

.donation-form .form-label {
    font-weight: 600;
    color: #2a3a4c;
    margin-bottom: 8px;
}

.donation-form .form-control {
    border-radius: 12px;
    border: 1px solid #d7e1ec;
    padding: 12px 14px;
    box-shadow: none;
}

.donation-form .form-control:focus {
    border-color: #0080ff;
    box-shadow: 0 0 0 0.15rem rgba(0, 128, 255, 0.15);
}

.donation-amount {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(110px, 1fr));
    gap: 10px;
    margin-top: 8px;
}

.amount-option {
    position: relative;
    border: 1px solid #d7e1ec;
    border-radius: 12px;
    padding: 12px 14px;
    background: #f6f9ff;
    cursor: pointer;
    transition: all 0.2s ease-in-out;
    font-weight: 700;
    color: #0b2648;
    text-align: center;
}

.amount-option input {
    position: absolute;
    inset: 0;
    opacity: 0;
    cursor: pointer;
}

.amount-option:hover {
    border-color: #0080ff;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.05);
}

.amount-option input:checked + span,
.amount-option input:checked ~ span {
    color: #ffffff;
}

.amount-option input:checked ~ span,
.amount-option input:checked + span {
    background: linear-gradient(135deg, #0a9dff, #0066ff);
    display: inline-block;
    width: 100%;
    border-radius: 10px;
    padding: 8px 10px;
    transition: background 0.2s ease-in-out;
}

.amount-option--other {
    background: #fff7eb;
    border-color: #ffd399;
    color: #b36b00;
}

.other-amount {
    margin-top: 14px;
    display: none;
}

.other-amount.is-visible {
    display: block;
}

.donation-checkbox {
    padding: 14px 16px;
    background: #f4f8fb;
    border-radius: 12px;
    border: 1px dashed #cbd8e6;
}

.address-fields {
    display: none;
    margin-top: 10px;
    padding: 18px;
    border-radius: 14px;
    background: #f8fbff;
    border: 1px solid #e4edf7;
}

.address-fields.is-visible {
    display: block;
}

.donation-submit {
    padding: 14px 24px;
    font-weight: 700;
    border-radius: 12px;
    text-transform: uppercase;
}

@media (max-width: 575px) {
    .donation-card {
        padding: 28px 22px;
    }
}