/* ========== C01: PAGE DEFAULTS ==========
   The universal selector includes padding and borders in declared widths.
   Body typography is inherited. rem is relative to the root font size. */
* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: 'DM Sans', Arial, sans-serif;
  color: #172b42;
  background: #fff;
  line-height: 1.65;
}

h1, h2, h3 {
  line-height: 1.15;
}

h1 {
  font-size: 3rem;
  letter-spacing: -0.04em;
  margin: 0 0 1rem;
}

h2 {
  font-size: 2rem;
}

h3 {
  font-size: 1.25rem;
}

p {
  max-width: 65ch;
}

a {
  color: #155a9c;
  text-underline-offset: 0.2em;
}

a:hover {
  color: #943617;
}

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

button, input, select, textarea {
  font: inherit;
}

button, summary {
  cursor: pointer;
}

/* ========== C02: SHARED PAGE SHELL (COPIED FOR INDEPENDENCE) ==========
   .container centers content with auto margins. Flexbox arranges navigation.
   This block is deliberately repeated in each page CSS: no hidden imports. */
.container {
  width: 90%;
  max-width: 1120px;
  margin: 0 auto;
}

.site-header {
  border-bottom: 1px solid #dbe3eb;
  background: white;
}

.header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.2rem 0;
  flex-wrap: wrap;
}

.brand {
  font-size: 1.2rem;
  font-weight: 700;
  text-decoration: none;
  color: #172b42;
}

.brand ion-icon {
  color: #c04e28;
  vertical-align: middle;
  font-size: 1.5rem;
}

nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 1.2rem;
  list-style: none;
  padding: 0;
  margin: 0;
}

nav a {
  color: inherit;
  text-decoration: none;
  font-size: 0.95rem;
}

nav a[aria-current='page'] {
  color: #a93917;
  border-bottom: 2px solid currentColor;
}

main {
  min-height: 65vh;
}

section {
  padding: 2.5rem 0;
}

.page-heading {
  padding: 3.5rem 0 1rem;
}

.eyebrow {
  color: #a93917;
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.lead {
  font-size: 1.2rem;
  color: #42586e;
}

.site-footer {
  background: #102d49;
  color: white;
  padding: 2.5rem 0;
  margin-top: 3rem;
}

.site-footer a {
  color: #d7e9fa;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

/* ========== C03: BASIC REUSABLE ELEMENTS ==========
   A class can style many elements. Padding is inside; margin is outside.
   Use a link for navigation and a button for an action. */
.button, button {
  display: inline-block;
  background: #174f7e;
  color: white;
  padding: 0.7rem 1.2rem;
  border: 1px solid #174f7e;
  border-radius: 4px;
  text-decoration: none;
}

.button:hover, button:hover {
  background: #113b60;
  color: white;
}

.secondary {
  color: #174f7e;
  background: white;
}

.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.card {
  border: 1px solid #dbe3eb;
  border-radius: 6px;
  overflow: hidden;
  background: white;
}

.card-body {
  padding: 1.25rem;
}

.card img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.note {
  background: #eef5fa;
  border-left: 4px solid #276493;
  padding: 1rem;
}

.tag {
  display: inline-block;
  font-size: 0.85rem;
  background: #edf3f8;
  padding: 0.2rem 0.6rem;
  border-radius: 3px;
}

/* ========== C04: KEYBOARD ACCESS ==========
   :focus-visible makes keyboard focus clear. The skip link appears on focus. */
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible, summary:focus-visible {
  outline: 3px solid #bd481e;
  outline-offset: 4px;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -100px;
  background: white;
  padding: 0.8rem;
  z-index: 10;
}

.skip-link:focus {
  top: 1rem;
}

/* ========== C05: FLUID MEDIA ==========
   max-width avoids overflow; aspect-ratio reserves the iframe shape. */
video, audio, object, embed {
  max-width: 100%;
}

video {
  height: auto;
}

iframe {
  width: 100%;
  aspect-ratio: 16 / 9;
  border: 1px solid #ccd8e2;
}

/* ========== C90: RESPONSIVE LAYOUT ==========
   This rule applies only at 700px or narrower. Source order matters. */
@media (max-width: 700px) {
  h1 {
    font-size: 2.2rem;
  }

  .cards {
    grid-template-columns: 1fr;
  }

  .header-row {
    align-items: flex-start;
  }

  nav ul {
    gap: 0.8rem;
  }

}

/* ========== C91: PRINT ==========
   Print removes navigation and dark backgrounds to save ink. */
@media print {
  .site-header, .site-footer, .skip-link, button {
    display: none;
  }

  body {
    color: black;
    background: white;
  }

  .container {
    width: 100%;
  }

  a {
    color: black;
  }

}