.si-shell {
  max-width: 1180px;
  margin: 0 auto;
  color: var(--ink, #20313b);
}
.si-shell h1 {
  font-size: clamp(1.7rem, 3vw, 2.3rem);
  letter-spacing: -0.035em;
  line-height: 1.15;
  margin: 0 0 20px;
}
.si-shell h2 {
  font-size: 1.06rem;
  line-height: 1.4;
  margin: 0 0 12px;
}
.si-shell h3 {
  font-size: 1rem;
}
.si-heading {
  margin-bottom: 26px;
}
.si-heading p,
.si-intro {
  color: #607580;
  line-height: 1.6;
  max-width: 760px;
}
.si-eyebrow {
  display: block;
  color: #17756e !important;
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  margin-bottom: 12px;
}
.si-hero {
  border-bottom: 1px solid #dce7e8;
  padding: 8px 0 24px;
}
.si-cards {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin: 22px 0;
}
.si-card {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 22px;
  border: 1px solid #dbe6e8;
  border-radius: 16px;
  background: white;
  color: inherit;
  text-decoration: none;
  transition:
    transform 0.18s,
    box-shadow 0.18s,
    border-color 0.18s;
}
.si-card:hover {
  transform: translateY(-3px);
  border-color: #7cb8b1;
  box-shadow: 0 8px 25px #163f4810;
}
.si-card:active {
  transform: translateY(0);
  background: #f0f8f6;
}
.si-card h2 {
  margin: 0 0 5px;
}
.si-card p {
  margin: 0;
  color: #667b85;
  font-size: 0.87rem;
  line-height: 1.5;
}
.si-icon {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  flex-shrink: 0;
  border-radius: 12px;
  background: #e9f5f1;
  color: #14766c;
}
.si-icon svg {
  width: 25px;
  height: 25px;
}
.si-arrow {
  margin-left: auto;
  color: #408c84;
}
.si-main-cards .si-card:first-child {
  grid-column: 1/-1;
  background: #edf7f4;
}
.si-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin: 20px 0;
}
.si-box {
  background: #fff;
  border: 1px solid #dbe6e8;
  border-radius: 14px;
  padding: 21px;
  min-width: 0;
}
.si-box ul {
  padding-left: 19px;
  margin: 0;
  line-height: 1.65;
}
.si-box li + li {
  margin-top: 7px;
}
.si-box p {
  line-height: 1.6;
  margin: 8px 0;
}
.si-alert {
  background: #fff6f1;
  border-color: #edd3bf;
  border-left: 4px solid #bd7645;
}
.si-alert h2 {
  color: #874b29;
}
.si-stack {
  display: grid;
  gap: 18px;
}
.si-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: #16756e;
  font-size: 0.88rem;
  font-weight: 600;
  text-decoration: none;
  padding: 10px 0;
  margin-right: 20px;
  line-height: 1.5;
}
.si-link:hover {
  text-decoration: underline;
}
.si-link-list {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}
.si-source {
  display: flex;
  flex-wrap: wrap;
  gap: 0 12px;
  margin-top: 22px;
}
.si-meta {
  font-size: 0.8rem;
  color: #667983;
}
.si-foot {
  display: block !important;
  margin-top: 32px !important;
  padding: 20px 0 !important;
  border-top: 1px solid #dce7e8;
  font-size: 0.75rem !important;
  line-height: 1.6;
  color: #71818a !important;
  background: transparent !important;
}
.si-age-picker {
  display: grid;
  gap: 18px;
  margin: 20px 0;
}
.si-age-group {
  display: grid;
  grid-template-columns: 170px 1fr;
  gap: 16px;
  border-bottom: 1px solid #e2eaec;
  padding: 15px 0;
}
.si-age-group h2 {
  font-size: 0.88rem;
  color: #5a737e;
  padding-top: 12px;
}
.si-age-group > div,
.si-chips {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}
.si-age-group a,
.si-chips a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 45px;
  padding: 10px 16px;
  background: white;
  border: 1px solid #d5e2e5;
  border-radius: 10px;
  text-decoration: none;
  color: #405d69;
  font-size: 0.9rem;
  transition:
    background 0.15s,
    border-color 0.15s;
}
.si-age-group a:hover,
.si-chips a:hover {
  background: #eef8f5;
  border-color: #49988e;
}
.si-age-group a[aria-current],
.si-chips a[aria-current] {
  background: #17766e;
  border-color: #17766e;
  color: white;
}
.si-age-disclosure {
  margin: 14px 0 22px;
}
.si-shell summary {
  cursor: pointer;
  font-weight: 600;
  line-height: 1.5;
  padding: 6px 0;
}
.si-chips {
  margin: 22px 0;
}
.si-table-wrap {
  overflow: auto;
  border: 1px solid #dce6e8;
  border-radius: 14px;
  margin: 20px 0;
  background: white;
}
.si-table-wrap table {
  width: 100%;
  border-collapse: collapse;
  min-width: 540px;
  font-size: 0.88rem;
  line-height: 1.6;
}
.si-table-wrap th,
.si-table-wrap td {
  padding: 15px 18px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid #e3ebed;
}
.si-table-wrap thead th {
  background: #eaf3f2;
  color: #42666d;
  font-size: 0.78rem;
}
.si-table-wrap tbody th {
  width: 23%;
  font-weight: 600;
}
.si-table-wrap tr:last-child > * {
  border-bottom: 0;
}
.si-form {
  display: flex;
  align-items: flex-end;
  gap: 16px;
  flex-wrap: wrap;
  margin: 15px 0;
}
.si-form label {
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex: 1 1 180px;
  font-size: 0.87rem;
  font-weight: 600;
}
.si-form input,
.si-form select {
  width: 100%;
  min-height: 46px;
  padding: 10px 12px;
  border: 1px solid #cbdcdf;
  border-radius: 9px;
  background: white;
  color: #243f4a;
  font: inherit;
  box-sizing: border-box;
}
.si-form input[type='checkbox'] {
  width: 20px;
  height: 20px;
  min-height: 20px;
  align-self: flex-start;
}
.si-form button {
  min-height: 46px;
  background: #17766e;
  color: white;
  border: 1px solid #17766e;
  border-radius: 9px;
  padding: 10px 18px;
  cursor: pointer;
}
.si-form button:hover {
  background: #105f59;
}
.si-form button:active {
  transform: translateY(1px);
}
.si-form button:disabled {
  background: #c9d7d5;
  color: #60706d;
  cursor: not-allowed;
}
.si-shell :focus-visible {
  outline: 3px solid #3a9b92;
  outline-offset: 3px;
}
.si-result {
  background: #eaf6f2;
  margin: 18px 0;
}
.si-result.si-alert {
  background: #fff3e9;
}
.si-vaccines details {
  border-bottom: 1px solid #e0e9e8;
  padding: 7px 0;
}
.si-vaccines summary {
  display: flex;
  justify-content: space-between;
  gap: 12px;
}
.si-vaccines summary span {
  font-size: 0.83rem;
  color: #687c83;
}
.si-vaccine-timeline {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
  margin: 24px 0;
}
.si-vaccine-timeline > section > h2 {
  color: #17766e;
}
.si-vaccine-timeline .si-box > h2 {
  display: none;
}
.si-vaccine-timeline .si-box {
  height: calc(100% - 36px);
}
@media (max-width: 650px) {
  .si-cards,
  .si-grid,
  .si-vaccine-timeline {
    grid-template-columns: 1fr;
  }
  .si-card {
    padding: 18px;
    gap: 12px;
  }
  .si-main-cards .si-card:first-child {
    grid-column: auto;
  }
  .si-age-group {
    grid-template-columns: 1fr;
    gap: 4px;
  }
  .si-age-group h2 {
    margin: 0 0 10px;
    padding: 0;
  }
  .si-box {
    padding: 17px;
  }
  .si-heading {
    margin-bottom: 20px;
  }
  .si-table-wrap th,
  .si-table-wrap td {
    padding: 12px;
  }
  .si-form {
    gap: 12px;
  }
  .si-form button {
    width: 100%;
  }
  .si-shell h1 {
    margin-bottom: 16px;
  }
}
@media (prefers-reduced-motion: reduce) {
  .si-card,
  .si-age-group a,
  .si-chips a {
    transition: none;
  }
  .si-card:hover {
    transform: none;
  }
}
#main:has(> .si-shell) > .history-navigation {
  max-width: 1180px;
  margin-left: auto;
  margin-right: auto;
}

/* Shared health hubs: identical hierarchy, cards and responsive layout. */
.si-featured {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
  margin: 24px 0;
}
.si-featured .si-card {
  min-height: 170px;
  padding: 28px;
  border-top: 4px solid #18756d;
  background: #f5faf9;
}
.si-featured .si-card:nth-child(2) {
  border-top-color: #557f9b;
  background: #f6f9fc;
}
.si-featured .si-card h2 {
  font-size: 1.5rem;
}
.si-card > div {
  min-width: 0;
}
.si-icon {
  flex: 0 0 44px;
}
.si-arrow {
  margin-left: auto;
  flex-shrink: 0;
}
.si-shell > .si-cards {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}
.si-card:focus-visible {
  outline: 3px solid #18756d;
  outline-offset: 3px;
}
.si-card:active {
  transform: translateY(0);
}
@media (max-width: 900px) {
  .si-shell > .si-cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}
@media (max-width: 650px) {
  .si-featured,
  .si-shell > .si-cards {
    grid-template-columns: 1fr;
  }
  .si-featured .si-card {
    min-height: 125px;
    padding: 22px;
  }
  .si-featured .si-card h2 {
    font-size: 1.25rem;
  }
}