:root {
  --color-bg: #ffffff;
  --color-surface: #f5f5f5;
  --color-text: #111827;
  --color-muted: #4b5563;
  --color-accent: #0f766e;
  --color-accent-soft: #ecfdf5;
  --color-border: #e5e7eb;
  --color-focus: #f97316;
  --font-body:
    system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --max-width: 72rem;
  --line-height: 1.6;
}

* {
  box-sizing: border-box;
}

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

body {
  font-family: var(--font-body);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: var(--line-height);
  font-size: 1rem;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--color-accent);
}

a:focus-visible,
button:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 3px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--color-accent);
  color: #ffffff;
  padding: 0.5rem 1rem;
  z-index: 1000;
}

.skip-link:focus {
  left: 0.75rem;
  top: 0.75rem;
}

.page {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1.25rem 1rem 3rem;
}

header {
  margin-bottom: 2rem;
}

header p {
  margin: 0.25rem 0;
}

h1,
h2,
h3 {
  font-weight: 700;
  line-height: 1.3;
  margin: 0 0 0.75rem;
}

h1 {
  font-size: 1.75rem;
  margin-bottom: 0.5rem;
}

h2 {
  font-size: 1.35rem;
  margin-top: 2rem;
}

h3 {
  font-size: 1.1rem;
  margin-top: 1.5rem;
}

p {
  margin: 0 0 0.9rem;
}

.meta {
  font-size: 0.95rem;
  color: var(--color-muted);
}

.section {
  margin-bottom: 1.5rem;
  padding: 1.25rem 1rem;
  border-radius: 0.5rem;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
}

.section--plain {
  background-color: transparent;
  border: none;
  padding: 0;
}

ul {
  padding-left: 1.25rem;
  margin: 0 0 0.9rem;
}

li {
  margin-bottom: 0.4rem;
}

.two-column {
  display: block;
  gap: 1.5rem;
}

.two-column__text,
.two-column__media {
  width: 100%;
}

.thumbnail-grid {
  display: grid;
  gap: 0.75rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.thumbnail-grid figure {
  margin: 0;
}

figure {
  margin: 0 0 0.75rem;
}

figcaption {
  font-size: 0.85rem;
  color: var(--color-muted);
  margin-top: 0.35rem;
}

.caption {
  font-size: 0.9rem;
  color: var(--color-muted);
  margin-top: 0.5rem;
}

.design-group {
  display: grid;
  gap: 1.5rem;
}

.btn {
  display: inline-block;
  border-radius: 20px;
  padding: 0.5rem 1.25rem;
  border: 1px solid var(--color-accent);
  background-color: #ffffff;
  color: var(--color-accent);
  font-size: 0.95rem;
  cursor: pointer;
}

.btn:hover {
  background-color: var(--color-accent-soft);
}

.btn:focus-visible {
  background-color: var(--color-accent-soft);
}

footer {
  margin-top: 2.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--color-border);
  font-size: 0.9rem;
  color: var(--color-muted);
}

/* Lighthouse images */

.lighthouse-figure {
  margin: 0 0 0.75rem;
}

.lighthouse-images {
  display: grid;
  gap: 0.75rem;
}

/* Modal */

.modal-backdrop {
  position: fixed;
  inset: 0;
  background-color: rgba(15, 23, 42, 0.6);
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 1rem;
  z-index: 2000;
}

.modal-backdrop[hidden] {
  display: none;
}

.modal {
  background-color: #ffffff;
  max-width: 56rem;
  width: 100%;
  max-height: 90vh;
  border-radius: 0.5rem;
  overflow: auto;
  padding: 1rem;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.75rem;
}

.modal-title {
  font-size: 1.1rem;
  margin: 0;
}

.modal-close {
  border: none;
  background: none;
  padding: 0.25rem 0.5rem;
  cursor: pointer;
  font-size: 1rem;
  color: var(--color-muted);
}

.modal-close:hover {
  color: var(--color-text);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

@media (min-width: 768px) {
  body {
    font-size: 1.05rem;
  }

  h1 {
    font-size: 2rem;
  }

  h2 {
    font-size: 1.5rem;
  }

  .page {
    padding: 2rem 1.5rem 3rem;
  }

  /* Default two-column layout on desktop */
  .two-column {
    display: grid;
    grid-template-columns: minmax(0, 2fr) minmax(0, 1.5fr);
    align-items: flex-start;
    column-gap: 1.5rem;
    gap: 1.5rem;
  }

  /* Stack digital design articles vertically; each uses its own two-column */
  .design-group {
    display: block;
  }

  /* Thumbnails: 3-up grid on desktop */
  .thumbnail-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  /* Lighthouse screenshots side by side */
  .lighthouse-images {
    display: flex;
    gap: 1rem;
  }

  /* Tighter grid for flyer section (image + bullets closer) */
  .section--tight-two-column .two-column {
    grid-template-columns: auto minmax(0, 1fr);
    column-gap: 0.75rem;
    gap: 0.75rem;
  }

  /* Tighter grid for Are You a Caregiver? and Volunteer 55+ sections */
  .two-column--tight {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    align-items: flex-start;
    column-gap: 0.75rem;
    gap: 0.75rem;
  }
  .two-column--tight .two-column__media {
    width: auto; /* optional, just documents intent */
  }

  .two-column--tight .two-column__text {
    min-width: 0; /* allow bullets to wrap within the column */
  }

  .two-column--tight .two-column__text ul {
    margin-top: 0;
  }
}