.assist-donation-v3 { max-width: 720px; margin: 0 auto; font-family: inherit; color: #1f2933; }
.assist-donation-v3 * { box-sizing: border-box; }
.adv3-card { background: #fff; border: 1px solid rgba(0,0,0,.08); border-radius: 22px; box-shadow: 0 18px 55px rgba(15,23,42,.12); overflow: hidden; }
.adv3-header { padding: 30px 32px 22px; background: linear-gradient(135deg, #f7fafc, #ffffff); border-bottom: 1px solid rgba(0,0,0,.06); }
.adv3-eyebrow { margin: 0 0 8px; font-size: 12px; font-weight: 800; letter-spacing: .11em; text-transform: uppercase; color: #7a8a9a; }
.adv3-header h3 { margin: 0; font-size: clamp(26px, 4vw, 40px); line-height: 1.05; }
.adv3-header p:last-child { margin: 10px 0 0; color: #5b6673; }
.adv3-form { padding: 28px 32px 32px; }
.adv3-step { display: none; }
.adv3-step.is-active { display: block; }
.adv3-frequency, .adv3-amounts { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; margin-bottom: 18px; }
.adv3-amounts { grid-template-columns: repeat(3, minmax(0, 1fr)); align-items: stretch; }
.adv3-frequency input { position: absolute; opacity: 0; pointer-events: none; }
.adv3-frequency span, .adv3-amount { display: flex; align-items: center; justify-content: center; gap: 5px; min-height: 52px; border: 1px solid #d6dde5; border-radius: 10px; background: #f3f4f6; font-weight: 900; cursor: pointer; transition: .18s ease; text-align: center; font-size: 1rem; line-height: 1.1; padding: 12px 16px; }
.adv3-frequency input:checked + span, .adv3-amount.is-selected { border-color: #020a2e; background: #020a2e; color: #fff; box-shadow: inset 0 0 0 1px #020a2e; }
.adv3-frequency span { min-height: 56px; font-size: 1rem; }
.adv3-amount { width: 100%; font-family: Georgia, serif; }
.adv3-amount small { font-size: .75rem; font-weight: 500; color: inherit; opacity: .72; letter-spacing: .04em; }
.adv3-other-trigger { grid-column: span 2; font-size: 1rem; }
.adv3-field, .adv3-other { display: block; margin: 14px 0; }
.adv3-field span, .adv3-other span { display: block; margin-bottom: 7px; font-weight: 800; font-size: 16px; line-height: 1.35; color: #344054; }
.adv3-field input, .adv3-field select, .adv3-field textarea, .adv3-other input { width: 100%; min-height: 48px; border: 1px solid #d6dde5; border-radius: 10px; padding: 10px 13px; font: inherit; background: #fff; }
.adv3-field textarea { min-height: 92px; resize: vertical; }
.adv3-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.adv3-check { display: flex; gap: 10px; align-items: flex-start; margin: 16px 0; font-size: 16px; line-height: 1.45; color: #344054; }
.adv3-check input { margin-top: 3px; accent-color: #020a2e; }
.adv3-actions { display: flex; gap: 12px; margin-top: 22px; }
.adv3-primary, .adv3-secondary { min-height: 54px; border: 0; border-radius: 999px; padding: 14px 22px; font: inherit; font-size: 1rem; font-weight: 900; cursor: pointer; transition: .18s ease; }
.adv3-primary { width: 100%; background: #020a2e; color: #fff; }
.adv3-primary:hover { transform: translateY(-1px); box-shadow: 0 10px 22px rgba(2,10,46,.22); }
.adv3-primary:disabled, .adv3-secondary:disabled { opacity: .65; cursor: not-allowed; transform: none; box-shadow: none; }
.adv3-secondary { background: #eef2f6; color: #24313f; }
.adv3-summary { margin: 0 0 18px; padding: 14px 16px; border-radius: 14px; background: #f7fafc; border: 1px solid #e5e9ef; }
.adv3-payment-element { margin: 18px 0; }
.adv3-message { margin-top: 16px; font-size: 14px; }
.adv3-message.is-error { color: #a51c30; }
.adv3-message.is-success { color: #166534; }
.is-hidden { display: none !important; }
.assist-donation-v3-error { border: 1px solid #fecaca; background: #fff1f2; color: #991b1b; padding: 14px; border-radius: 10px; }
@media (max-width: 640px) {
  .adv3-card { border-radius: 16px; }
  .adv3-header, .adv3-form { padding-left: 20px; padding-right: 20px; }
  .adv3-amounts { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .adv3-other-trigger { grid-column: span 2; }
  .adv3-frequency span { min-height: 54px; font-size: 1rem; }
  .adv3-amount { min-height: 52px; font-size: 1rem; }
  .adv3-amount small { font-size: .75rem; }
  .adv3-grid, .adv3-frequency { grid-template-columns: 1fr; }
  .adv3-actions { flex-direction: column-reverse; }
}