/* ==========================================================================
   Aaron Pagel — Observatory theme
   Deep-space base, brass/copper accent, serif display + sans body.
   ========================================================================== */

:root {
  --bg: #0b0e14;
  --bg-panel: #10141d;
  --bg-panel-raised: #141926;
  --line: #262c3a;
  --line-soft: #1b202c;
  --text: #e8e6df;
  --text-dim: #9a9788;
  --text-faint: #6b6f7a;
  --accent: #c08a3e;
  --accent-bright: #d9a75c;
  --accent-dim: #6e5730;
  --serif: "Source Serif 4", Georgia, "Times New Roman", serif;
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --max-w: 1080px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

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

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

a:hover {
  color: var(--accent);
  text-decoration: underline;
}

h1, h2, h3, h4 {
  font-family: var(--serif);
  font-weight: 600;
  color: var(--text);
  line-height: 1.2;
  margin: 0 0 0.5em;
}

.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 28px;
}

/* ---------- Header / Nav ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(11, 14, 20, 0.86);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line-soft);
}

.nav-wrap {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 18px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  font-family: var(--serif);
  font-size: 1.15rem;
  letter-spacing: 0.02em;
  color: var(--text);
}

.brand:hover {
  color: var(--accent-bright);
  text-decoration: none;
}

.brand .brand-sub {
  display: block;
  font-family: var(--sans);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-faint);
  margin-top: 2px;
}

nav.main-nav ul {
  list-style: none;
  display: flex;
  gap: 2px;
  margin: 0;
  padding: 0;
}

nav.main-nav a {
  display: inline-block;
  padding: 8px 14px;
  font-size: 0.86rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-dim);
  border-radius: 3px;
}

nav.main-nav a:hover {
  color: var(--text);
  text-decoration: none;
  background: var(--bg-panel);
}

nav.main-nav a.active {
  color: var(--accent-bright);
}

.nav-toggle {
  display: none;
}

.nav-toggle-label {
  display: none;
}

/* ---------- Hero (starfield texture, home page only) ---------- */

.hero {
  position: relative;
  padding: 96px 0 72px;
  background-image:
    radial-gradient(1px 1px at 12% 22%, rgba(232,230,223,0.55), transparent),
    radial-gradient(1px 1px at 28% 68%, rgba(232,230,223,0.4), transparent),
    radial-gradient(1.5px 1.5px at 44% 12%, rgba(232,230,223,0.5), transparent),
    radial-gradient(1px 1px at 62% 45%, rgba(232,230,223,0.35), transparent),
    radial-gradient(1.5px 1.5px at 75% 78%, rgba(232,230,223,0.5), transparent),
    radial-gradient(1px 1px at 88% 30%, rgba(232,230,223,0.4), transparent),
    radial-gradient(1px 1px at 95% 60%, rgba(232,230,223,0.3), transparent),
    radial-gradient(1.5px 1.5px at 8% 82%, rgba(232,230,223,0.4), transparent),
    radial-gradient(1px 1px at 55% 90%, rgba(232,230,223,0.3), transparent);
  background-color: var(--bg);
  border-bottom: 1px solid var(--line-soft);
}

.hero-inner {
  display: flex;
  align-items: center;
  gap: 48px;
}

.hero-portrait img {
  width: 168px;
  height: 168px;
  object-fit: cover;
  border-radius: 50%;
  border: 1px solid var(--accent-dim);
  box-shadow: 0 0 0 6px var(--bg-panel);
}

.eyebrow {
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 14px;
}

.hero h1 {
  font-size: 2.6rem;
  margin-bottom: 0.2em;
}

.hero .role {
  font-size: 1.05rem;
  color: var(--text-dim);
  margin-bottom: 18px;
}

.hero p.lede {
  max-width: 56ch;
  color: var(--text-dim);
  font-size: 1.02rem;
}

.hero-actions {
  margin-top: 24px;
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

/* ---------- Buttons ---------- */

.btn {
  display: inline-block;
  padding: 10px 20px;
  font-size: 0.86rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  border: 1px solid var(--accent-dim);
  border-radius: 3px;
  color: var(--text);
}

.btn:hover {
  border-color: var(--accent);
  color: var(--accent-bright);
  text-decoration: none;
  background: var(--bg-panel);
}

.btn.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #10141d;
  font-weight: 600;
}

.btn.primary:hover {
  background: var(--accent-bright);
  border-color: var(--accent-bright);
  color: #0b0e14;
}

/* ---------- Sections ---------- */

section {
  padding: 64px 0;
}

section.alt {
  background: var(--bg-panel);
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
}

section.compact {
  padding: 32px 0 24px;
}

.section-head {
  margin-bottom: 40px;
}

.section-head .eyebrow {
  margin-bottom: 10px;
}

.section-head h2 {
  font-size: 1.8rem;
}

.section-head p {
  color: var(--text-dim);
  max-width: 62ch;
}

/* page header banner used on interior pages */

.page-banner {
  padding: 56px 0 40px;
  border-bottom: 1px solid var(--line-soft);
}

.page-banner h1 {
  font-size: 2.1rem;
}

.page-banner p {
  color: var(--text-dim);
  max-width: 62ch;
}

/* ---------- Cards / nav grid on home ---------- */

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 20px;
}

.card {
  background: var(--bg-panel);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 26px;
  transition: border-color 0.15s ease, transform 0.15s ease;
}

.card:hover {
  border-color: var(--accent-dim);
  transform: translateY(-2px);
}

.card .card-num {
  font-family: var(--serif);
  color: var(--accent);
  font-size: 0.85rem;
  letter-spacing: 0.1em;
}

.card h3 {
  font-size: 1.15rem;
  margin: 10px 0 8px;
}

.card p {
  color: var(--text-dim);
  font-size: 0.94rem;
  margin: 0;
}

.card a.card-link {
  display: block;
  color: inherit;
}

.card a.card-link:hover {
  text-decoration: none;
}

.card a.card-link:hover h3 {
  color: var(--accent-bright);
}

/* ---------- Timeline (About page) ---------- */

.timeline-item {
  display: flex;
  gap: 28px;
  padding-bottom: 48px;
}

.timeline-item:last-child {
  padding-bottom: 0;
}

/* vertical spine with the year set sideways along the line */

.t-year-rail {
  position: relative;
  width: 34px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.t-year-rail::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 1px;
  background: var(--line);
  transform: translateX(-50%);
}

.t-year {
  position: relative;
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  background: var(--bg);
  padding: 10px 0;
  font-family: var(--serif);
  color: var(--accent);
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  white-space: nowrap;
}

/* every period is expressed as a bracket, so single- and multi-role
   entries share the same visual form */

.bracket-group {
  flex: 1;
  display: flex;
  gap: 22px;
  min-width: 0;
}

.bracket-line {
  flex-shrink: 0;
  width: 14px;
  margin: 3px 0;
  border-left: 2px solid var(--accent-dim);
  border-top: 2px solid var(--accent-dim);
  border-bottom: 2px solid var(--accent-dim);
  border-radius: 6px 0 0 6px;
}

.bracket-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 26px;
  min-width: 0;
}

.bracket-entry h3 {
  font-size: 1.15rem;
  margin-bottom: 6px;
}

.bracket-entry p {
  color: var(--text-dim);
  margin: 0;
}

/* ---------- Entry list (Research / Teaching / Service records) ---------- */

.entry-list {
  display: flex;
  flex-direction: column;
}

.entry {
  padding: 26px 0;
  border-top: 1px solid var(--line-soft);
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 24px;
}

.entry:first-child {
  border-top: none;
}

.entry .entry-meta {
  color: var(--text-faint);
  font-size: 0.86rem;
  letter-spacing: 0.04em;
  padding-top: 2px;
}

.entry h3 {
  font-size: 1.12rem;
  margin-bottom: 6px;
}

.entry .entry-sub {
  color: var(--text-dim);
  font-size: 0.92rem;
  margin-bottom: 10px;
}

.entry .entry-tag {
  display: inline-block;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  border: 1px solid var(--accent-dim);
  border-radius: 20px;
  padding: 2px 10px;
  margin-bottom: 10px;
}

.entry ul {
  margin: 8px 0 0;
  padding-left: 20px;
  color: var(--text-dim);
  font-size: 0.94rem;
}

.entry ul li {
  margin-bottom: 4px;
}

/* ---------- Simple two-col list (conferences, consortia) ---------- */

.line-list {
  border-top: 1px solid var(--line-soft);
}

.line-list .line-item {
  display: grid;
  grid-template-columns: 130px 1fr;
  gap: 24px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line-soft);
}

.line-list .line-item .entry-meta {
  color: var(--text-faint);
  font-size: 0.86rem;
}

.line-list .line-item div p {
  margin: 0;
  color: var(--text-dim);
}

.line-list .line-item div p em {
  color: var(--text);
  font-style: italic;
}

/* ---------- Pull quote ---------- */

.pull {
  font-family: var(--serif);
  font-size: 1.3rem;
  font-style: italic;
  color: var(--text);
  border-left: 2px solid var(--accent);
  padding-left: 24px;
  margin: 8px 0;
}

/* ---------- Carousel (Student reviews) ---------- */

.carousel {
  position: relative;
  max-width: 720px;
  margin: 0 auto;
}

.carousel-track {
  position: relative;
  min-height: 110px;
}

.carousel-slide {
  display: none;
  text-align: center;
  padding: 0;
}

.carousel-slide.active {
  display: block;
  animation: carousel-fade 0.5s ease;
}

@keyframes carousel-fade {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

.carousel-slide .pull {
  border-left: none;
  padding-left: 0;
  font-size: 1.05rem;
  max-width: 58ch;
  margin: 0 auto 10px;
}

.carousel-meta {
  color: var(--text-faint);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.carousel-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-top: 14px;
}

.carousel-btn {
  background: none;
  border: 1px solid var(--accent-dim);
  color: var(--text-dim);
  width: 30px;
  height: 30px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 0.9rem;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color 0.15s ease, color 0.15s ease;
}

.carousel-btn:hover {
  border-color: var(--accent);
  color: var(--accent-bright);
}

.carousel-dots {
  display: flex;
  gap: 8px;
}

.carousel-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  border: 1px solid var(--accent-dim);
  background: transparent;
  cursor: pointer;
  padding: 0;
}

.carousel-dot.active {
  background: var(--accent);
  border-color: var(--accent);
}

/* ---------- Footer ---------- */

footer.site-footer {
  border-top: 1px solid var(--line-soft);
  padding: 40px 0;
  margin-top: 40px;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-inner .f-name {
  font-family: var(--serif);
  color: var(--text-dim);
}

.footer-links a {
  color: var(--text-faint);
  font-size: 0.88rem;
  margin-left: 18px;
}

.footer-links a:hover {
  color: var(--accent-bright);
}

/* ---------- Responsive ---------- */

@media (max-width: 720px) {
  .hero-inner {
    flex-direction: column;
    align-items: flex-start;
    text-align: left;
  }

  .hero-portrait img {
    width: 128px;
    height: 128px;
  }

  .entry,
  .line-list .line-item {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .entry .entry-meta {
    padding-top: 0;
  }

  .timeline-item {
    gap: 16px;
  }

  .t-year-rail {
    width: 26px;
  }

  .t-year {
    font-size: 0.72rem;
  }

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .footer-links a {
    margin-left: 0;
    margin-right: 18px;
  }
}

@media (max-width: 640px) {
  .nav-toggle-label {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    cursor: pointer;
    color: var(--text-dim);
    font-size: 1.4rem;
  }

  nav.main-nav {
    display: none;
    width: 100%;
    order: 3;
  }

  nav.main-nav ul {
    flex-direction: column;
    gap: 0;
    border-top: 1px solid var(--line-soft);
    margin-top: 14px;
    padding-top: 8px;
  }

  nav.main-nav a {
    padding: 12px 4px;
  }

  .nav-toggle:checked ~ nav.main-nav {
    display: block;
  }

  .nav-wrap {
    flex-wrap: wrap;
  }
}