/* Blackford Family Travels
   Main stylesheet for travel.blackford.info
*/

:root {
  --bg: #f4f6f8;
  --surface: #ffffff;
  --surface-muted: #eef2f5;
  --text: #20262d;
  --text-muted: #64707c;
  --border: #dce2e8;
  --accent: #465c70;
  --accent-dark: #2e4152;
  --sidebar: #18242e;
  --sidebar-text: #eef3f6;
  --sidebar-muted: #aebbc5;
  --shadow: 0 8px 24px rgba(20, 32, 43, 0.07);
  --radius: 14px;
  --content-width: 1120px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
    "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.6;
}

a {
  color: var(--accent-dark);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

a:hover {
  text-decoration-thickness: 2px;
}

.site-shell {
  min-height: 100vh;
}

/* Left navigation */

.sidebar {
  position: fixed;
  inset: 0 auto 0 0;
  width: 240px;
  padding: 34px 26px;
  background: var(--sidebar);
  color: var(--sidebar-text);
  display: flex;
  flex-direction: column;
  z-index: 10;
}

.site-name {
  color: var(--sidebar-text);
  text-decoration: none;
  margin-bottom: 38px;
}

.site-name-main,
.site-name-sub {
  display: block;
}

.site-name-main {
  font-size: 1.45rem;
  font-weight: 750;
  letter-spacing: 0.01em;
}

.site-name-sub {
  margin-top: 2px;
  color: var(--sidebar-muted);
  font-size: 0.92rem;
  letter-spacing: 0.03em;
}

.site-nav {
  display: grid;
  gap: 6px;
}

.site-nav a,
.sidebar-links a {
  color: var(--sidebar-muted);
  text-decoration: none;
  border-radius: 8px;
  padding: 8px 10px;
  transition: background 120ms ease, color 120ms ease;
}

.site-nav a:hover,
.site-nav a:focus-visible,
.sidebar-links a:hover,
.sidebar-links a:focus-visible {
  background: rgba(255, 255, 255, 0.08);
  color: var(--sidebar-text);
}

.site-nav a.active {
  background: rgba(255, 255, 255, 0.11);
  color: var(--sidebar-text);
  font-weight: 650;
}

.sidebar-links {
  margin-top: auto;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
}

/* Main content */

.content {
  margin-left: 240px;
  padding: 58px clamp(26px, 5vw, 72px) 36px;
}

.content > * {
  width: min(100%, var(--content-width));
  margin-inline: auto;
}

.hero {
  padding: 34px 0 46px;
  border-bottom: 1px solid var(--border);
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 750;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.hero h1 {
  margin: 0;
  font-size: clamp(2.3rem, 5vw, 4.3rem);
  line-height: 1.05;
  letter-spacing: -0.045em;
  font-weight: 800;
}

.intro {
  max-width: 720px;
  margin: 18px 0 0;
  color: var(--text-muted);
  font-size: 1.08rem;
}

/* Decades */

.decade {
  scroll-margin-top: 30px;
  padding: 46px 0 8px;
}

.section-heading {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 18px;
}

.section-heading h2 {
  margin: 0;
  font-size: 1.65rem;
  letter-spacing: -0.025em;
}

.section-heading span {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.trip-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.trip-card {
  min-height: 220px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  display: grid;
  grid-template-columns: 84px 1fr;
  transition: transform 140ms ease, box-shadow 140ms ease, border-color 140ms ease;
}

.trip-card:hover {
  transform: translateY(-2px);
  border-color: #cbd4dc;
  box-shadow: 0 12px 28px rgba(20, 32, 43, 0.10);
}

.trip-year {
  padding: 25px 15px;
  background: var(--surface-muted);
  border-right: 1px solid var(--border);
  color: var(--accent-dark);
  font-size: 0.9rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  text-align: center;
}

.trip-body {
  display: flex;
  flex-direction: column;
  padding: 24px 24px 22px;
}

.trip-body h3 {
  margin: 0;
  font-size: 1.22rem;
  line-height: 1.25;
}

.trip-body h3 a {
  color: var(--text);
  text-decoration: none;
}

.trip-body h3 a:hover {
  color: var(--accent-dark);
  text-decoration: underline;
}

.trip-body p {
  margin: 12px 0 18px;
  color: var(--text-muted);
  font-size: 0.96rem;
}

.trip-link {
  margin-top: auto;
  align-self: flex-start;
  color: var(--accent-dark);
  font-size: 0.92rem;
  font-weight: 700;
  text-decoration: none;
}

.trip-link:hover {
  text-decoration: underline;
}

.trip-actions {
  margin-top: auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 18px;
}

.trip-actions .trip-link {
  margin-top: 0;
}

.secondary-link {
  color: var(--text-muted);
  font-size: 0.84rem;
}

.featured {
  border-color: #c7d2dc;
}

/* Footer */

.footer {
  margin-top: 52px;
  padding: 26px 0 12px;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.86rem;
  display: flex;
  justify-content: space-between;
  gap: 20px;
}

.footer p {
  margin: 0;
}

/* Keyboard focus */

a:focus-visible {
  outline: 3px solid rgba(70, 92, 112, 0.35);
  outline-offset: 3px;
}

/* Responsive */

@media (max-width: 900px) {
  .sidebar {
    position: static;
    width: auto;
    padding: 20px 22px;
  }

  .site-name {
    margin-bottom: 14px;
  }

  .site-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
  }

  .sidebar-links {
    display: none;
  }

  .content {
    margin-left: 0;
    padding: 30px 20px 28px;
  }
}

@media (max-width: 700px) {
  .hero {
    padding-top: 16px;
  }

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

  .trip-card {
    min-height: 0;
  }

  .section-heading {
    align-items: flex-start;
    flex-direction: column;
    gap: 2px;
  }

  .footer {
    flex-direction: column;
    gap: 8px;
  }
}

@media (max-width: 460px) {
  .trip-card {
    grid-template-columns: 68px 1fr;
  }

  .trip-year {
    padding-inline: 10px;
  }

  .trip-body {
    padding: 20px 18px;
  }
}