:root {
    --primary: #444D3D;
    --primary-dark: #1f4520;
    --danger: #c0392b;
    --border: #d8dcd6;
    --text: #222;
    --muted: #666;
    --bg: #ffffff;
    --radius: 8px;
}

* { box-sizing: border-box; }

html, body {
    margin: 0;
    padding: 0;
    background: transparent;
}

body, input, textarea, select {
  font-family: 'IBM Plex Sans',Helvetica,Arial,Lucida,sans-serif;
}

body {
    color: var(--text);
    font-size: 15px;
}

.donation-widget {
    max-width: 560px;
    margin: 0 auto;
    padding: 20px;
    background: var(--bg);
}

.donation-header h1 {
    font-size: 22px;
    margin: 0 0 4px;
    color: var(--primary-dark);
}

.donation-header p {
    margin: 0 0 20px;
    color: var(--muted);
}

.section {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px 16px 8px;
    margin-bottom: 18px;
}

.section legend {
    padding: 0 8px;
    font-weight: 600;
    color: var(--primary-dark);
}

.field { margin-bottom: 14px; }

.field-row {
    display: flex;
    gap: 12px;
}

.field-row .field { flex: 1; }

.field-row-3 .field { flex: 1; }

label {
    display: block;
    font-weight: 500;
    margin-bottom: 4px;
    font-size: 13.5px;
}

input[type="text"],
input[type="email"],
input[type="tel"],
select,
textarea {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 15px;
    font-family: inherit;
    background: #fff;
    color: var(--text);
}

input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(44, 95, 45, 0.15);
}

input.invalid, select.invalid {
    border-color: var(--danger);
}

.field-error {
    display: block;
    color: var(--danger);
    font-size: 12.5px;
    min-height: 16px;
    margin-top: 2px;
}

.checkbox-field label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 400;
}

.checkbox-field input { width: auto; }

.amount-presets {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-bottom: 14px;
}

.amount-btn {
    flex: 1 1 18%;
    padding: 10px 6px;
    border: 1px solid var(--border);
    background: #fff;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    color: var(--primary-dark);
    transition: background .15s, color .15s;
}

.amount-btn:hover { background: #f2f7f2; }

.amount-btn.active {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff;
}

.amount-input {
    display: flex;
    align-items: center;
    border: 1px solid var(--border);
    border-radius: 6px;
    overflow: hidden;
}

.amount-input .prefix {
    padding: 10px 10px;
    background: #f2f2f2;
    color: var(--muted);
    font-weight: 600;
}

.amount-input input {
    border: none;
    flex: 1;
}

.amount-input input:focus { box-shadow: none; }

.payment-toggle {
    display: flex;
    gap: 8px;
    margin-bottom: 16px;
}

.pm-btn {
    flex: 1;
    padding: 10px;
    border: 1px solid var(--border);
    background: #fff;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    color: var(--muted);
}

.pm-btn.active {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff;
}

.submit-btn {
    width: 100%;
    padding: 14px;
    background: var(--primary);
    color: #fff;
    border: none;
    border-radius: var(--radius);
    font-size: 16px;
    font-weight: 700;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    transition: background .15s;
}

.submit-btn:hover { background: var(--primary-dark); }

.submit-btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

.spinner {
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255,255,255,0.4);
    border-top-color: #fff;
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.secure-note {
    text-align: center;
    font-size: 12.5px;
    color: var(--muted);
    margin-top: 10px;
}

.alert {
    padding: 12px 14px;
    border-radius: 6px;
    margin-bottom: 16px;
    font-size: 14px;
}

.alert.error {
    background: #fdecea;
    color: var(--danger);
    border: 1px solid #f5c6c1;
}

.alert.success {
    background: #eaf5ea;
    color: var(--primary-dark);
    border: 1px solid #c3ddc3;
}

.success-panel {
    text-align: center;
    padding: 30px 10px;
}

.success-panel h2 {
    color: var(--primary-dark);
}

@media (max-width: 480px) {
    .field-row, .field-row-3 { flex-direction: column; gap: 0; }
    .amount-btn { flex: 1 1 30%; }
}