/* ChokeOn.com — First Aid for Choking
   Design tokens */
:root {
  --red-600: #c0202c;
  --red-700: #9c1722;
  --red-50: #fdecec;
  --ink-900: #171a1f;
  --ink-700: #3c4149;
  --ink-500: #6b7280;
  --ink-200: #e3e6ea;
  --ink-100: #f2f4f6;
  --white: #ffffff;
  --blue-700: #1d4ed8;
  --blue-50: #eaf1ff;
  --amber-600: #b45309;
  --amber-50: #fef6e7;
  --green-700: #157347;
  --green-50: #e9f7ef;
  --radius: 12px;
  --shadow-sm: 0 1px 2px rgba(23,26,31,0.06), 0 1px 1px rgba(23,26,31,0.04);
  --shadow-md: 0 4px 12px rgba(23,26,31,0.08);
  --max-width: 1080px;
  --focus-ring: 0 0 0 3px rgba(29,78,216,0.35);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
  color: var(--ink-900);
  background: var(--white);
  line-height: 1.55;
}

img, svg { max-width: 100%; display: block; }

a { color: var(--blue-700); }
a:focus-visible,
button:focus-visible,
[tabindex]:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
  border-radius: 4px;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

/* Skip link */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--red-700);
  color: var(--white);
  padding: 10px 16px;
  z-index: 1000;
  border-radius: 0 0 8px 0;
}
.skip-link:focus {
  left: 0;
}

/* Emergency banner */
.emergency-banner {
  background: var(--red-700);
  color: var(--white);
  text-align: center;
  font-weight: 600;
  padding: 10px 16px;
  font-size: 0.95rem;
}
.emergency-banner a {
  color: var(--white);
  text-decoration: underline;
}

/* Header / nav */
.site-header {
  border-bottom: 1px solid var(--ink-200);
  position: sticky;
  top: 0;
  background: var(--white);
  z-index: 100;
}
.nav-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  gap: 16px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--ink-900);
  text-decoration: none;
  white-space: nowrap;
}
.brand .brand-mark {
  width: 34px;
  height: 34px;
  border-radius: 8px;
  background: var(--red-600);
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  flex: none;
}
.brand .brand-mark svg { width: 20px; height: 20px; }

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--ink-200);
  border-radius: 8px;
  padding: 8px 10px;
  cursor: pointer;
}
.nav-toggle svg { width: 22px; height: 22px; }

.main-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-wrap: wrap;
}
.main-nav a {
  color: var(--ink-700);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 8px 12px;
  border-radius: 8px;
  white-space: nowrap;
}
.main-nav a:hover { background: var(--ink-100); color: var(--ink-900); }
.main-nav a[aria-current="page"] {
  color: var(--red-700);
  background: var(--red-50);
}

@media (max-width: 860px) {
  .nav-toggle { display: inline-flex; align-items: center; justify-content: center; }
  .main-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--white);
    border-bottom: 1px solid var(--ink-200);
    flex-direction: column;
    align-items: stretch;
    padding: 8px;
    box-shadow: var(--shadow-md);
  }
  .main-nav.open { display: flex; }
  .main-nav a { padding: 12px 14px; }
}

/* Hero */
.hero {
  background: linear-gradient(180deg, var(--red-50) 0%, var(--white) 100%);
  padding: 56px 0 40px;
  border-bottom: 1px solid var(--ink-200);
}
.hero .container {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 40px;
  align-items: center;
}
@media (max-width: 780px) {
  .hero .container { grid-template-columns: 1fr; }
}
.eyebrow {
  display: inline-block;
  color: var(--red-700);
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  font-size: 0.8rem;
  margin-bottom: 10px;
}
.hero h1 {
  font-size: clamp(2rem, 4vw, 2.75rem);
  line-height: 1.15;
  margin: 0 0 16px;
}
.hero p.lede {
  font-size: 1.1rem;
  color: var(--ink-700);
  margin: 0 0 24px;
  max-width: 52ch;
}
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; }

.hero-card {
  background: var(--white);
  border: 1px solid var(--ink-200);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  padding: 22px;
}
.hero-card h2 {
  margin: 0 0 12px;
  font-size: 1.05rem;
}
.hero-card ol { margin: 0; padding-left: 1.1em; }
.hero-card li { margin-bottom: 8px; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 20px;
  border-radius: 999px;
  font-weight: 700;
  text-decoration: none;
  font-size: 0.98rem;
  border: 2px solid transparent;
  cursor: pointer;
}
.btn-primary {
  background: var(--red-600);
  color: var(--white);
}
.btn-primary:hover { background: var(--red-700); }
.btn-secondary {
  background: var(--white);
  color: var(--ink-900);
  border-color: var(--ink-200);
}
.btn-secondary:hover { border-color: var(--ink-500); }

/* Sections */
section { padding: 48px 0; }
.section-tight { padding: 32px 0; }
h2.section-title {
  font-size: clamp(1.5rem, 3vw, 2rem);
  margin: 0 0 8px;
}
p.section-sub {
  color: var(--ink-700);
  margin: 0 0 32px;
  max-width: 65ch;
}

/* Audience cards on homepage */
.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
@media (max-width: 900px) {
  .card-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 620px) {
  .card-grid { grid-template-columns: 1fr; }
}
.audience-card {
  border: 1px solid var(--ink-200);
  border-radius: var(--radius);
  padding: 24px;
  text-decoration: none;
  color: var(--ink-900);
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: box-shadow 0.15s ease, transform 0.15s ease;
  background: var(--white);
}
.audience-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.audience-card .icon-wrap {
  width: 48px;
  height: 48px;
  border-radius: 10px;
  background: var(--blue-50);
  display: flex;
  align-items: center;
  justify-content: center;
}
.audience-card .icon-wrap svg { width: 26px; height: 26px; color: var(--blue-700); }
.audience-card h3 { margin: 4px 0 0; font-size: 1.15rem; }
.audience-card p { margin: 0; color: var(--ink-700); font-size: 0.95rem; }
.audience-card .card-link { margin-top: auto; font-weight: 700; color: var(--red-700); }

/* Alert boxes */
.alert {
  border-radius: var(--radius);
  padding: 18px 20px;
  border: 1px solid;
  display: flex;
  gap: 14px;
  align-items: flex-start;
  margin: 24px 0;
}
.alert svg { width: 24px; height: 24px; flex: none; margin-top: 2px; }
.alert-danger {
  background: var(--red-50);
  border-color: #f3c7cb;
  color: #7a141d;
}
.alert-warning {
  background: var(--amber-50);
  border-color: #f2dcae;
  color: #7a4c05;
}
.alert-info {
  background: var(--blue-50);
  border-color: #c6d9fb;
  color: #123a8f;
}
.alert-success {
  background: var(--green-50);
  border-color: #bfe6cf;
  color: #0e5934;
}
.alert h3, .alert strong.alert-title {
  display: block;
  margin: 0 0 4px;
  font-size: 1rem;
}
.alert p { margin: 0; }

/* Step lists */
.steps {
  counter-reset: step;
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 18px;
}
.steps li {
  counter-increment: step;
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 16px;
  border: 1px solid var(--ink-200);
  border-radius: var(--radius);
  padding: 18px 20px;
  background: var(--white);
}
.steps li::before {
  content: counter(step);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--red-600);
  color: var(--white);
  font-weight: 800;
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  justify-content: center;
}
.steps h3 { margin: 2px 0 6px; font-size: 1.05rem; }
.steps p { margin: 0; color: var(--ink-700); }
.steps p.tip {
  margin-top: 8px;
  font-size: 0.9rem;
  color: var(--ink-500);
}

/* Tabs for age groups */
.age-tabs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  border-bottom: 1px solid var(--ink-200);
  margin-bottom: 28px;
}
.age-tab {
  background: none;
  border: none;
  padding: 12px 6px;
  font-weight: 700;
  font-size: 1rem;
  color: var(--ink-500);
  cursor: pointer;
  border-bottom: 3px solid transparent;
  margin-right: 12px;
}
.age-tab[aria-selected="true"] {
  color: var(--red-700);
  border-bottom-color: var(--red-600);
}
.age-panel { display: none; }
.age-panel.active { display: block; }

/* Infographic image */
.infographic {
  border: 1px solid var(--ink-200);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  margin: 8px 0 36px;
}
.infographic img { width: 100%; height: auto; }
.infographic figcaption {
  padding: 12px 20px;
  font-size: 0.85rem;
  color: var(--ink-500);
  background: var(--ink-100);
  border-top: 1px solid var(--ink-200);
}

/* Two column layout */
.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
}
@media (max-width: 780px) {
  .two-col { grid-template-columns: 1fr; }
}

/* Do / Don't lists */
.do-dont-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
@media (max-width: 620px) {
  .do-dont-grid { grid-template-columns: 1fr; }
}
.do-dont-grid .box {
  border-radius: var(--radius);
  padding: 20px;
  border: 1px solid var(--ink-200);
}
.do-dont-grid .do { background: var(--green-50); border-color: #bfe6cf; }
.do-dont-grid .dont { background: var(--red-50); border-color: #f3c7cb; }
.do-dont-grid h3 { margin-top: 0; }
.do-dont-grid ul { margin: 0; padding-left: 1.2em; }
.do-dont-grid li { margin-bottom: 8px; }

/* Prevention checklist */
.checklist {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}
.checklist li {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  border: 1px solid var(--ink-200);
  border-radius: 10px;
  padding: 14px 16px;
}
.checklist li svg {
  width: 20px;
  height: 20px;
  color: var(--green-700);
  flex: none;
  margin-top: 2px;
}

/* Table (choking hazard foods by age) */
.table-wrap { overflow-x: auto; border: 1px solid var(--ink-200); border-radius: var(--radius); }
table { border-collapse: collapse; width: 100%; min-width: 560px; }
th, td { text-align: left; padding: 12px 16px; border-bottom: 1px solid var(--ink-200); font-size: 0.95rem; }
th { background: var(--ink-100); font-weight: 700; }
tr:last-child td { border-bottom: none; }

/* FAQ */
.faq details {
  border: 1px solid var(--ink-200);
  border-radius: 10px;
  padding: 4px 18px;
  margin-bottom: 12px;
}
.faq summary {
  cursor: pointer;
  font-weight: 700;
  padding: 14px 0;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary .chev { transition: transform 0.15s ease; flex: none; width: 18px; height: 18px; color: var(--ink-500); }
.faq details[open] summary .chev { transform: rotate(180deg); }
.faq p { margin: 0 0 16px; color: var(--ink-700); }

/* Callout / disclaimer box */
.callout {
  background: var(--ink-100);
  border-radius: var(--radius);
  padding: 20px 22px;
  font-size: 0.92rem;
  color: var(--ink-700);
}
.callout strong { color: var(--ink-900); }

/* CTA band */
.cta-band {
  background: var(--ink-900);
  color: var(--white);
  padding: 48px 0;
  text-align: center;
}
.cta-band h2 { margin: 0 0 10px; }
.cta-band p { color: #cfd3d8; margin: 0 0 24px; }
.cta-band .btn-secondary {
  background: transparent;
  color: var(--white);
  border-color: #4b5058;
}
.cta-band .btn-secondary:hover { border-color: var(--white); }

/* Footer */
.site-footer {
  border-top: 1px solid var(--ink-200);
  padding: 40px 0 24px;
  color: var(--ink-500);
  font-size: 0.9rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 32px;
  margin-bottom: 24px;
}
@media (max-width: 700px) {
  .footer-grid { grid-template-columns: 1fr; }
}
.footer-grid h4 { color: var(--ink-900); margin: 0 0 12px; font-size: 0.95rem; }
.footer-grid ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.footer-grid a { color: var(--ink-500); text-decoration: none; }
.footer-grid a:hover { color: var(--ink-900); text-decoration: underline; }
.footer-bottom {
  border-top: 1px solid var(--ink-200);
  padding-top: 20px;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

/* Utility */
.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  margin: -1px; padding: 0; border: 0;
  clip: rect(0 0 0 0);
  overflow: hidden;
  white-space: nowrap;
}
.text-center { text-align: center; }
.mt-0 { margin-top: 0; }