/* edwardkim.net: the one stylesheet for every page. */

:root {
  --bg: #ffffff;
  --bg-alt: #f7f8fa;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --accent-soft: #eff4ff;
  --text: #374151;
  --muted: #6b7280;
  --heading: #111827;
  --border: #e5e7eb;

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "SF Mono", "Fira Code", "Fira Mono", "Roboto Mono", Menlo, Consolas, monospace;

  --nav-height: 60px;
  --width: 920px;
  --gutter: 24px;
}

/* --- Base --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; scroll-padding-top: calc(var(--nav-height) + 16px); }

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); text-decoration: underline; }
strong, b { color: var(--heading); font-weight: 600; }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
h1, h2, h3 { color: var(--heading); line-height: 1.25; }

.wrap, .section-inner {
  max-width: var(--width);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

/* Small monospace labels used throughout. */
.eyebrow, .hero-greeting, .news-year-label, .dates, .cv-date, .course-code,
.student-year, .grad-year, .press-year, .card-number, .funding-tag, .news-tag,
.interest-tag, .pub-note, .cv-grant-amount, .footer-credit {
  font-family: var(--font-mono);
}

/* --- Navigation --- */
.nav {
  position: fixed;
  inset: 0 0 auto 0;
  height: var(--nav-height);
  z-index: 100;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  max-width: var(--width);
  height: 100%;
  margin: 0 auto;
  padding: 0 var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo { font-weight: 700; font-size: 1.15rem; color: var(--heading); }
.nav-logo span { color: var(--accent); }
.nav-logo:hover { color: var(--heading); text-decoration: none; }

.nav-links { display: flex; gap: 1.75rem; }
.nav-links a { font-size: 0.9rem; color: var(--muted); padding: 4px 0; border-bottom: 2px solid transparent; }
.nav-links a:hover { color: var(--heading); text-decoration: none; }
.nav-links a.active { color: var(--accent); border-bottom-color: var(--accent); }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  background: none;
  border: 0;
  cursor: pointer;
}
.nav-toggle span { width: 22px; height: 2px; background: var(--heading); }

/* --- Page header (inner pages) --- */
.page-header {
  padding: calc(var(--nav-height) + 2.75rem) 0 1.75rem;
  border-bottom: 1px solid var(--border);
}
.page-header h1 { font-size: 2.25rem; letter-spacing: -0.02em; }
.page-header .accent { color: var(--accent); }
.page-intro { margin-top: 0.6rem; max-width: 46rem; color: var(--muted); font-size: 1.05rem; }
.eyebrow { font-size: 0.8rem; color: var(--accent); margin-bottom: 0.4rem; }

.page-body { padding-top: 2.25rem; padding-bottom: 3.5rem; }

/* Section titles on inner pages. */
.page-body h2, .block-title {
  font-size: 1.3rem;
  margin: 2.5rem 0 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
}
.page-body > :first-child,
.page-body > section:first-child > h2:first-child { margin-top: 0; }


.page-body h3 { font-size: 1rem; }

/* --- Home: sections --- */
body > section { padding: 3.5rem 0; }
.section-alt { background: var(--bg-alt); }

.section-heading {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  font-size: 1.4rem;
  margin-bottom: 1.5rem;
}
.section-heading::before {
  content: attr(data-number);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 400;
  color: var(--accent);
}
.section-heading::after {
  content: "";
  flex: 1;
  max-width: 260px;
  height: 1px;
  margin-left: 0.75rem;
  background: var(--border);
  align-self: center;
}

/* --- Home: hero --- */
.hero { padding: calc(var(--nav-height) + 3.5rem) 0 3rem; }
.hero-inner { max-width: var(--width); margin: 0 auto; padding: 0 var(--gutter); }
.hero-intro { display: flex; align-items: center; gap: 1.75rem; flex-wrap: wrap; }
.hero-photo {
  width: 128px;
  height: 128px;
  border-radius: 50%;
  border: 3px solid var(--border);
}
.hero-greeting { font-size: 0.85rem; color: var(--accent); }
.hero-name { font-size: 2.75rem; letter-spacing: -0.02em; margin: 0.15rem 0 0.25rem; }
.hero-title { font-size: 1.2rem; font-weight: 400; color: var(--muted); }
.hero-subtitle { max-width: 40rem; color: var(--muted); }
.hero-subtitle--spaced { margin-top: 1.5rem; }
.hero-cta {
  display: inline-block;
  margin-top: 1.25rem;
  padding: 0.55rem 1.1rem;
  font-size: 0.9rem;
  border: 1px solid var(--accent);
  border-radius: 6px;
}
.hero-cta:hover, .contact-cta:hover { background: var(--accent-soft); text-decoration: none; }

/* --- Home: about --- */
.about-content { display: grid; grid-template-columns: 3fr 2fr; gap: 2rem; align-items: start; }
.about-text p + p { margin-top: 0.85rem; }
.about-interests {
  padding: 1.1rem 1.25rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
}
.about-interests h3 { font-size: 0.95rem; margin-bottom: 0.75rem; }
.interest-list { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.interest-tag {
  font-size: 0.72rem;
  padding: 0.2rem 0.6rem;
  color: var(--accent);
  background: var(--accent-soft);
  border-radius: 999px;
}

/* --- Cards (home highlights, lab research areas) --- */
.research-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1rem; }
.research-card {
  padding: 1.1rem 1.25rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
}
.research-card h3 { font-size: 1rem; margin-bottom: 0.35rem; }
.research-card p { font-size: 0.9rem; color: var(--muted); }
.card-number { font-size: 0.75rem; color: var(--accent); margin-bottom: 0.25rem; }
.funding-tag {
  display: inline-block;
  margin-top: 0.6rem;
  font-size: 0.72rem;
  padding: 0.15rem 0.55rem;
  color: var(--accent);
  background: var(--accent-soft);
  border-radius: 4px;
}

/* On inner pages (Lab) the cards become numbered rows, like the press list. */
.page-body .research-grid { grid-template-columns: 1fr; gap: 0; }
.page-body .research-card { position: relative; padding: 0.6rem 0 0.6rem 5rem; border: 0; border-radius: 0; }
.page-body .research-card + .research-card { border-top: 1px dashed var(--border); }
.page-body .card-number { position: absolute; left: 0; top: 0.75rem; font-size: 0.85rem; }
.page-body .research-card p { font-size: 0.92rem; }

.section-alt .news-year-label::before { background: var(--bg-alt); }

/* --- Home: industry --- */
/* About one blank line (1.6rem, the body line height) between entries. */
.role { display: grid; grid-template-columns: 7rem 1fr; gap: 1rem; padding: 1.6rem 0; }
.role:first-child { padding-top: 0; }
.role:last-child { padding-bottom: 0; }
.role + .role { border-top: 1px dashed var(--border); }
.role-years { font-family: var(--font-mono); font-size: 0.85rem; color: var(--accent); padding-top: 0.15rem; }
.role h3 { font-size: 1.05rem; margin-bottom: 0.25rem; }
.role h3 a { color: var(--heading); }
.role-title { margin-left: 0.4rem; font-weight: 400; color: var(--muted); }
.role p { font-size: 0.95rem; }

/* --- Home: news --- */
.news-timeline { border-left: 2px solid var(--border); padding-left: 1.5rem; }
.news-year + .news-year { margin-top: 1.5rem; }
.news-year-label { position: relative; font-size: 0.95rem; color: var(--accent); margin-bottom: 0.5rem; }
.news-year-label::before {
  content: "";
  position: absolute;
  left: calc(-1.5rem - 6px);
  top: 50%;
  width: 10px;
  height: 10px;
  margin-top: -5px;
  border-radius: 50%;
  background: var(--bg);
  border: 2px solid var(--accent);
}
/* Block layout (not flex) so the text wraps as one line of prose beside the tag. */
.news-item { position: relative; padding: 0.3rem 0 0.3rem 6.5rem; font-size: 0.95rem; }
.news-tag {
  position: absolute;
  left: 0;
  top: 0.5rem;
  width: 5.5rem;
  text-align: center;
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 0.1rem 0;
  border-radius: 4px;
  color: var(--accent);
  background: var(--accent-soft);
}
.news-tag--grant { color: #047857; background: #ecfdf5; }
.news-tag--award { color: #b45309; background: #fffbeb; }
.news-tag--milestone { color: #be185d; background: #fdf2f8; }

/* --- Home: contact --- */
.contact-content > p { max-width: 40rem; }
.contact-details { display: flex; flex-wrap: wrap; gap: 0.5rem 2rem; margin-top: 1rem; font-size: 0.95rem; }
.contact-cta {
  display: inline-block;
  margin-top: 1.25rem;
  padding: 0.55rem 1.1rem;
  font-size: 0.9rem;
  border: 1px solid var(--accent);
  border-radius: 6px;
}

/* --- Publications --- */
.category-section + .category-section { margin-top: 0.5rem; }
.pub-year-group {
  display: grid;
  grid-template-columns: 4rem 1fr;
  gap: 1rem;
  padding: 0.5rem 0;
}
.pub-year-group + .pub-year-group { border-top: 1px dashed var(--border); }
.pub-year-group h3 { font-family: var(--font-mono); font-size: 0.95rem; color: var(--accent); padding-top: 0.15rem; }
.pub-list { list-style: none; }
.pub-list li { font-size: 0.92rem; padding: 0.4rem 0; }
.pub-title { color: var(--heading); font-weight: 600; }
.pub-venue { font-style: italic; }
.pub-note {
  display: inline-block;
  margin-left: 0.25rem;
  font-size: 0.7rem;
  padding: 0 0.45rem;
  color: var(--muted);
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: 4px;
}
.pub-note.best-paper { color: #b45309; background: #fffbeb; border-color: #fde68a; }

/* --- CV --- */
.cv-contact-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0.35rem 2rem; }
.cv-contact-item strong { font-weight: 600; }

.cv-entry {
  display: grid;
  grid-template-columns: 1fr auto;
  column-gap: 1.5rem;
  padding: 0.6rem 0;
}
.cv-entry + .cv-entry { border-top: 1px dashed var(--border); }
.cv-entry > * { grid-column: 1; }
.cv-entry .cv-date { grid-column: 2; grid-row: 1; font-size: 0.8rem; color: var(--muted); white-space: nowrap; padding-top: 0.15rem; }
.cv-subtitle { color: var(--accent); font-size: 0.95rem; }
.cv-desc { font-size: 0.9rem; color: var(--muted); }
.edu-degree { font-weight: 600; }

.cv-list li { padding: 0.3rem 0; font-size: 0.92rem; }
.cv-list li + li { border-top: 1px dashed var(--border); }
.cv-highlight { color: var(--heading); font-weight: 600; }
.cv-grant-amount { font-size: 0.85rem; color: var(--accent); }
.cv-link { color: var(--accent); }

.service-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0 2rem; }
.service-item { padding: 0.35rem 0; font-size: 0.9rem; border-bottom: 1px dashed var(--border); }

.students-heading { font-size: 0.95rem; color: var(--accent); margin-bottom: 0.25rem; }
.students-heading--spaced { margin-top: 1.25rem; }

/* --- Teaching --- */
.institution + .institution { margin-top: 0.5rem; }
.institution-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  margin: 2.5rem 0 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
}
.page-body .institution-header h2 { margin: 0; padding: 0; border: 0; }
.page-body > .institution:first-child .institution-header { margin-top: 0; }
.dates { font-size: 0.8rem; color: var(--muted); }
.institution-role { margin: -0.5rem 0 0.75rem; color: var(--muted); font-size: 0.92rem; }

.course-item {
  display: grid;
  grid-template-columns: minmax(16rem, 1fr) 2fr;
  gap: 1rem;
  align-items: baseline;
  padding: 0.5rem 0;
}
.course-item + .course-item { border-top: 1px dashed var(--border); }
.course-name { font-weight: 600; color: var(--heading); font-size: 0.95rem; }
.course-code { color: var(--accent); font-weight: 400; font-size: 0.82rem; margin-right: 0.4rem; }
.course-terms { display: flex; flex-wrap: wrap; gap: 0.3rem; }
.course-terms span, .tag {
  font-size: 0.75rem;
  padding: 0.1rem 0.5rem;
  color: var(--muted);
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: 4px;
}
.simple-courses { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.simple-courses .tag { font-size: 0.82rem; color: var(--text); }

.advising-group + .advising-group { margin-top: 1.5rem; }
.advising-group h3 { font-size: 0.95rem; color: var(--accent); margin-bottom: 0.25rem; }
.student-card, .graduated-card { padding: 0.5rem 0; }
.student-card + .student-card, .graduated-card + .graduated-card { border-top: 1px dashed var(--border); }
.student-card { display: flex; align-items: baseline; gap: 0.75rem; flex-wrap: wrap; }
.student-name { font-weight: 600; color: var(--heading); }
.student-topic { color: var(--muted); font-size: 0.92rem; }
.student-year { margin-left: auto; font-size: 0.8rem; color: var(--muted); }
.graduated-card > span { display: block; }
.grad-year { display: inline !important; margin-left: 0.4rem; font-size: 0.8rem; font-weight: 400; color: var(--accent); }
.dissertation { font-style: italic; font-size: 0.92rem; }
.co-advised { font-size: 0.85rem; color: var(--muted); }

/* --- Lab --- */
.funding-grid { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.funding-badge {
  font-size: 0.85rem;
  padding: 0.25rem 0.7rem;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: 4px;
}
.membership-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 0.75rem;
  font-size: 0.9rem;
  padding: 0.35rem 0.8rem;
  color: var(--heading);
  background: var(--accent-soft);
  border-radius: 4px;
}
.badge-icon { color: var(--accent); }

.press-item { display: grid; grid-template-columns: 4rem 1fr; gap: 1rem; padding: 0.5rem 0; font-size: 0.92rem; }
.press-item + .press-item { border-top: 1px dashed var(--border); }
.press-year { color: var(--accent); font-size: 0.85rem; padding-top: 0.1rem; }
.press-outlet { font-weight: 600; color: var(--heading); }

/* --- Footer --- */
.footer {
  width: calc(100% - 2 * var(--gutter));
  max-width: calc(var(--width) - 2 * var(--gutter));
  margin: 0 auto;
  padding: 1.5rem 0 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  border-top: 1px solid var(--border);
}
.footer-links { display: flex; gap: 1.25rem; font-size: 0.9rem; }
.footer-links a { color: var(--muted); }
.footer-credit { font-size: 0.75rem; color: var(--muted); }

/* --- Small screens --- */
@media (max-width: 720px) {
  :root { --gutter: 16px; }

  .nav-toggle { display: flex; }
  .nav-links {
    display: none;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0.25rem;
    padding: 0.75rem var(--gutter) 1rem;
    background: rgba(255, 255, 255, 0.98);
    border-bottom: 1px solid var(--border);
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 0.4rem 0; border-bottom: 0; }

  .page-header { padding-top: calc(var(--nav-height) + 1.75rem); }
  .page-header h1 { font-size: 1.75rem; }
  .hero { padding-top: calc(var(--nav-height) + 2rem); }
  .hero-name { font-size: 2rem; }
  .hero-photo { width: 96px; height: 96px; }
  body > section { padding: 2.5rem 0; }

  .about-content, .research-grid, .cv-contact-grid, .service-grid { grid-template-columns: 1fr; }
  .course-item, .pub-year-group, .role { grid-template-columns: 1fr; gap: 0.25rem; }
  .cv-entry { grid-template-columns: 1fr; }
  .cv-entry .cv-date { grid-column: 1; grid-row: auto; }
  .news-tag { width: 4.75rem; }
  .news-item { padding-left: 5.5rem; }
}