* {
    box-sizing: border-box;
}

html {
    font-family: Arial, Helvetica, sans-serif;
    color: #222;
    background: #f5f5f2;
}

body {
    margin: 0;
    line-height: 1.6;
}

.container {
    width: min(1100px, calc(100% - 40px));
    margin: 0 auto;
}

.container.narrow {
    max-width: 760px;
}

.site-header {
    background: #fff;
    border-bottom: 1px solid #ddd;
    padding: 18px 0;
}

.site-name {
    color: #222;
    font-size: 1.25rem;
    font-weight: 700;
    text-decoration: none;
}

.hero {
    padding: 70px 0 35px;
    text-align: center;
}

.hero h1 {
    margin: 0 0 15px;
    font-size: clamp(2rem, 5vw, 3.5rem);
    line-height: 1.1;
}

.lead {
    margin: 0;
    font-size: 1.25rem;
}

.donation-section {
    padding: 20px 0 80px;
}

.donation-card {
    background: #fff;
    border: 1px solid #ddd;
    border-radius: 8px;
    padding: 35px;
}

.donation-card h2 {
    margin-top: 0;
}

.site-footer {
    padding: 30px 0;
    border-top: 1px solid #ddd;
    font-size: .9rem;
    color: #666;
}


.org-name {
    margin-bottom: 10px;
    font-size: 1.2rem;
    font-weight: 700;
    letter-spacing: .08em;
}

.donation-form {
    margin-top: 25px;
}

.amount-options {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
    margin-bottom: 25px;
}

.amount-button {
    padding: 14px 8px;
    border: 1px solid #aaa;
    border-radius: 6px;
    background: #fff;
    font-size: 1.1rem;
    cursor: pointer;
}

.amount-button:hover,
.amount-button.selected {
    border-color: #333;
    background: #eee;
}

.donation-form label {
    display: block;
    margin-bottom: 7px;
    font-weight: 600;
}

.amount-input {
    display: flex;
    align-items: center;
    margin-bottom: 22px;
    border: 1px solid #aaa;
    border-radius: 6px;
    background: #fff;
}

.amount-input span {
    padding-left: 15px;
    font-size: 1.25rem;
}

.amount-input input {
    width: 100%;
    padding: 14px 12px;
    border: 0;
    outline: none;
    background: transparent;
    font-size: 1.25rem;
}

.donate-button {
    width: 100%;
    padding: 16px;
    border: 0;
    border-radius: 6px;
    background: #222;
    color: #fff;
    font-size: 1.1rem;
    font-weight: 700;
    cursor: pointer;
}

.donate-button:hover {
    background: #444;
}

.payment-note {
    margin: 18px 0 0;
    text-align: center;
    color: #666;
    font-size: .9rem;
}

.tax-info {
    padding: 35px 5px 10px;
}

.tax-info h2 {
    margin-top: 0;
}

.tax-info h3 {
    margin-top: 30px;
}

@media (max-width: 600px) {
    .amount-options {
        grid-template-columns: repeat(2, 1fr);
    }

    .donation-card {
        padding: 25px 20px;
    }
}