/* Kisho Hoshi - personal academic website */

:root {
  --bg: #fdfdfb;
  --text: #1f2328;
  --muted: #5b6168;
  --ubc-blue: #002145;         /* UBC primary (brand.ubc.ca) */
  --accent: #0055b7;           /* UBC secondary blue, PMS 2935 */
  --accent-hover: #002145;
  --rule: #d9dbdf;
  --font-serif: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, serif;
  --font-sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #16181c;
    --text: #e4e6ea;
    --muted: #a0a6ad;
    --accent: #6ec4e8;         /* lighter UBC secondary blue, readable on dark */
    --accent-hover: #97d4e9;
    --rule: #33373e;
    color-scheme: dark;
  }
}

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

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-serif);
  font-size: 1.125rem;
  line-height: 1.6;
}

.wrap {
  max-width: 46rem;
  margin: 0 auto;
  padding: 0 1rem;
}

a { color: var(--accent); text-decoration: none; }
a:hover, a:focus-visible { color: var(--accent-hover); text-decoration: underline; }

/* ---------- header and navigation ---------- */

/* UBC Blue band with white text, in both light and dark mode */
.site-header {
  background: var(--ubc-blue);
  padding: 1.1rem 0;
}

.site-header .wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.5rem 1.5rem;
}

.site-name {
  font-size: 1.5rem;
  font-weight: 600;
  color: #ffffff;
  letter-spacing: 0.01em;
}
.site-name:hover, .site-name:focus-visible { color: #ffffff; text-decoration: none; }

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 1.25rem;
  font-family: var(--font-sans);
  font-size: 0.95rem;
}
.site-nav a { color: rgba(255, 255, 255, 0.8); }
.site-nav a:hover, .site-nav a:focus-visible { color: #ffffff; }
.site-nav a[aria-current="page"] { color: #ffffff; font-weight: 600; }
.site-header a:focus-visible { outline: 2px solid #ffffff; outline-offset: 3px; }
/* on a dark page the navy band needs an edge to stand out */
@media (prefers-color-scheme: dark) {
  .site-header { border-bottom: 2px solid #0055b7; }
}

/* ---------- main content ---------- */

main { padding: 2rem 0 3rem; }

h1 { font-size: 2rem; line-height: 1.2; margin: 0 0 0.25rem; }
h2 {
  font-size: 1.25rem;
  margin: 2.25rem 0 0.75rem;
  padding-bottom: 0.25rem;
  border-bottom: 1px solid var(--rule);
}
main > .wrap > h2:first-child { margin-top: 0; }

p { margin: 0 0 1rem; }

/* page heading for screen readers on pages whose visible headings start at h2 */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.subtitle { color: var(--muted); margin: 0 0 1.25rem; }

/* home page: photo beside intro when a photo is present */
.profile {
  display: flex;
  gap: 1.75rem;
  align-items: flex-start;
}
.profile img {
  width: 11rem;
  height: auto;
  border-radius: 4px;
  flex-shrink: 0;
}
@media (max-width: 36rem) {
  .profile { flex-direction: column; }
  .profile img { width: 9rem; }
}

.jm-note { font-weight: 700; }

/* ---------- research entries ---------- */

.paper { margin: 0 0 1.5rem; }
.paper-title { font-weight: 600; display: block; width: fit-content; }
.paper-meta { display: block; color: var(--muted); font-size: 1rem; }
.paper-meta em { color: var(--text); }
/* links inside running text are underlined, not told apart by colour alone */
.paper-meta a, main p a { text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 0.15em; }

details { margin-top: 0.35rem; font-size: 1rem; }
summary {
  cursor: pointer;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  color: var(--accent);
  width: fit-content;
}
details p { margin: 0.5rem 0 0; text-align: justify; hyphens: auto; }

/* ---------- teaching ---------- */

h3 { font-size: 1.05rem; margin: 1.5rem 0 0.25rem; }
.role { color: var(--muted); font-style: italic; margin: 0 0 0.5rem; }

.course-list { list-style: none; padding: 0; margin: 0 0 1rem; }
.course-list li {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.3rem 0;
  border-bottom: 1px dotted var(--rule);
}
.course-list .term { color: var(--muted); text-align: right; white-space: nowrap; }
@media (max-width: 36rem) {
  .course-list li { flex-direction: column; gap: 0; }
  .course-list .term { text-align: left; white-space: normal; }
}

/* ---------- footer ---------- */

.site-footer {
  border-top: 1px solid var(--rule);
  padding: 1rem 0 2rem;
  font-family: var(--font-sans);
  font-size: 0.85rem;
  color: var(--muted);
}