:root {
  color-scheme: light;
  --bg: #ffffff;
  --surface: #ffffff;
  --text: #1e1f24;
  --muted: #5c5f66;
  --accent: #2f5fb3;
  --border: #e1e3e8;
  --shadow: 0 12px 30px rgba(21, 28, 40, 0.08);
  --max-width: 800px;
  --margin-calc: calc((100vw - 1080px) / 2);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Inter", "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover,
a:focus-visible {
  text-decoration: underline;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.site-header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 32px 0;
}

.header-content {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.eyebrow {
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--muted);
  margin: 0 0 6px 0;
}

h1 {
  font-size: 2.6rem;
  margin: 0 0 4px 0;
}

.subtitle {
  margin: 0;
  color: var(--muted);
  font-size: 1.0rem;
}

.site-nav {
  font-weight: 600;
}

.nav-desktop {
  display: none;
}

.nav-dropdown {
  display: block;
}

.nav-dropdown summary {
  list-style: none;
  cursor: pointer;
  padding: 8px 0;
}

.nav-dropdown summary::-webkit-details-marker {
  display: none;
}

.nav-links {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 8px 0 0;
}

.section {
  padding: 48px 0;
  border-top: 1px solid var(--border);
}

.section:first-of-type {
  border-top: none;
}

.section-alt {
  background: transparent;
}

h2 {
  font-size: 2rem;
  margin: 0 0 16px 0;
}

h3 {
  font-size: 1.35rem;
  margin: 0 0 8px 0;
}

.lead {
  font-size: 1.1rem;
  color: var(--muted);
}

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

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  box-shadow: var(--shadow);
  margin-bottom: 24px;
}

.card ul {
  margin: 12px 0 0 18px;
  padding: 0;
}

.card-header-row {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.card-header-row h3 {
  flex: 1;
  margin: 0 0 8px 0;
}

.card-expandable {
  cursor: pointer;
}

.card-expandable:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.card-body {
  margin-top: 12px;
}

.card-expandable.card-collapsed .card-body {
  display: none;
}

.button {
  display: inline-block;
  margin-top: 16px;
  padding: 10px 18px;
  border-radius: 999px;
  background: var(--accent);
  color: #fff;
  font-weight: 600;
}

.button:hover,
.button:focus-visible {
  text-decoration: none;
  background: #244a8f;
}

@media (min-width: 1080px) {
  body {
    display: flex;
    min-height: 100vh;
  }

  .site-header {
    width: 280px;
    flex-shrink: 0;
    margin-left: calc(var(--margin-calc) - 40px);
    height: 100vh;
    border-right: 1px solid var(--border);
    border-bottom: none;
    position: sticky;
    top: 0;
    align-self: flex-start;
  }

  .header-content {
    flex-direction: column;
    align-items: flex-end;
    gap: 24px;
    text-align: right;
  }

  .site-nav {
    margin-top: 8px;
  }

  .nav-desktop {
    display: flex;
    flex-direction: column;
    gap: 12px;
  }

  .nav-dropdown {
    display: none;
  }

  .header-photo {
    display: block;
    width: 200px;
    height: 200px;
    border-radius: 50%;
    object-fit: cover;
    margin-top: 8px;
    margin-bottom: 16px;
    margin-left: 40px;
  }

  main {
    flex: 1;
    max-width: 800px;
    margin-right: calc(var(--margin-calc) + 40px);
  }

  h1 {
    font-size: 2.2rem;
  }
}

@media (min-width: 800px) {
  main {
    border-right: 1px solid var(--border);
  }
}

@media (max-width: 1099px) {
  .site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    transition: padding 0.2s ease, box-shadow 0.2s ease;
  }

  .header-title-row {
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    width: 100%;
  }

  .header-subtitles {
    text-align: right;
    flex-shrink: 0;
  }

  .header-subtitles .subtitle {
    margin: 0;
  }

  .header-subtitles .subtitle + .subtitle {
    margin-top: 2px;
  }

  .header-photo {
    display: none;
  }

  .site-header.header-compact {
    padding: 12px 0;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
  }

  .site-header.header-compact .header-content {
    flex-direction: row;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
  }

  .site-header.header-compact h1 {
    font-size: 1.5rem;
    margin: 0;
  }

  .site-header.header-compact .header-subtitles {
    display: none;
  }

  .section {
    padding: 36px 0;
  }

  h2 {
    font-size: 1.7rem;
  }
}