/* ============================================================
   ACADEMIC WEBSITE — Dr Calumet Links
   Design: Nobel-laureate minimalist institutional aesthetic
   Palette: White, maroon (#5b0a0a), dark maroon (#3d0707),
            warm accent (#c4a35a), light gray (#f8f8f8)
   Typography: Palatino / Georgia (serif) for body,
               system sans-serif for navigation
   ============================================================ */

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

:root {
  --color-bg: #ffffff;
  --color-bg-alt: #f7f7f5;
  --color-bg-dark: #5b0a0a;
  --color-text: #2c2c2c;
  --color-text-light: #5a5a5a;
  --color-text-muted: #888888;
  --color-accent: #8b1a1a;
  --color-accent-light: #a52a2a;
  --color-gold: #c4a35a;
  --color-border: #e0e0e0;
  --color-border-light: #eeeeee;
  --font-serif: 'Palatino Linotype', 'Book Antiqua', Palatino, Georgia, 'Times New Roman', serif;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
  --max-width: 960px;
  --max-width-wide: 1100px;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-serif);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.72;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color 0.2s ease;
}
a:hover {
  color: var(--color-accent-light);
}

img {
  max-width: 100%;
  height: auto;
}

/* ---- Header / Top Bar ---- */
.site-header {
  background: var(--color-bg-dark);
  color: #ffffff;
  border-bottom: 3px solid var(--color-gold);
}

.header-inner {
  max-width: var(--max-width-wide);
  margin: 0 auto;
  padding: 1.5rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.site-title {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 400;
  letter-spacing: 0.02em;
  color: #ffffff;
}

.site-title a {
  color: #ffffff;
  text-decoration: none;
}

.site-title a:hover {
  color: var(--color-gold);
}

.site-title .title-accent {
  color: var(--color-gold);
  font-weight: 600;
}

/* ---- Navigation ---- */
.main-nav {
  font-family: var(--font-sans);
}

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

.main-nav a {
  display: block;
  padding: 0.5rem 1.1rem;
  color: rgba(255,255,255,0.78);
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  text-decoration: none;
  transition: color 0.2s ease, border-bottom 0.2s ease;
  border-bottom: 2px solid transparent;
}

.main-nav a:hover,
.main-nav a.active {
  color: #ffffff;
  border-bottom: 2px solid var(--color-gold);
}

/* Mobile hamburger */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: #ffffff;
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0.25rem;
}

/* ---- Sub-header / Institutional Bar ---- */
.institution-bar {
  background: var(--color-bg-alt);
  border-bottom: 1px solid var(--color-border);
  font-family: var(--font-sans);
  font-size: 0.78rem;
  color: var(--color-text-muted);
  letter-spacing: 0.03em;
}

.institution-bar-inner {
  max-width: var(--max-width-wide);
  margin: 0 auto;
  padding: 0.5rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.institution-bar a {
  color: var(--color-text-muted);
}
.institution-bar a:hover {
  color: var(--color-accent);
}

/* ---- Main Content ---- */
.main-content {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2.5rem 2rem 4rem;
}

/* ---- Hero Section (Home page) ---- */
.hero {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 3rem;
  align-items: start;
  margin-bottom: 3rem;
  padding-bottom: 2.5rem;
  border-bottom: 1px solid var(--color-border-light);
}

.hero-photo {
  width: 280px;
}

.hero-photo img {
  width: 100%;
  display: block;
  filter: grayscale(5%);
  border: 1px solid var(--color-border);
}

.hero-info h1 {
  font-family: var(--font-serif);
  font-size: 2rem;
  font-weight: 400;
  line-height: 1.2;
  margin-bottom: 0.4rem;
  color: var(--color-bg-dark);
}

.hero-info .position {
  font-family: var(--font-sans);
  font-size: 0.95rem;
  color: var(--color-text-light);
  margin-bottom: 0.2rem;
  line-height: 1.5;
}

.hero-info .department {
  font-family: var(--font-sans);
  font-size: 0.88rem;
  color: var(--color-text-muted);
  margin-bottom: 1.5rem;
}

.hero-info .bio-text {
  font-size: 1.02rem;
  line-height: 1.78;
  color: var(--color-text);
}

.hero-info .bio-text p {
  margin-bottom: 1rem;
}

/* Contact details box */
.contact-box {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border-light);
  padding: 1.2rem 1.5rem;
  margin-top: 1.5rem;
  font-family: var(--font-sans);
  font-size: 0.85rem;
  line-height: 1.8;
  color: var(--color-text-light);
}

.contact-box strong {
  color: var(--color-text);
  font-weight: 600;
}

/* ---- Section Headings ---- */
.section-heading {
  font-family: var(--font-serif);
  font-size: 1.55rem;
  font-weight: 400;
  color: var(--color-bg-dark);
  margin-bottom: 1.2rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--color-gold);
}

.section-heading-small {
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-bg-dark);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-top: 2.5rem;
  margin-bottom: 1rem;
}

/* ---- Affiliations Grid ---- */
.affiliations {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.8rem 2rem;
  margin-top: 1rem;
  margin-bottom: 2rem;
}

.affiliation-item {
  font-family: var(--font-sans);
  font-size: 0.88rem;
  color: var(--color-text-light);
  padding: 0.6rem 0;
  border-bottom: 1px solid var(--color-border-light);
}

.affiliation-item .aff-role {
  color: var(--color-text);
  font-weight: 600;
  display: block;
}

/* ---- Research Interests Tags ---- */
.research-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.8rem;
  margin-bottom: 2rem;
}

.research-tag {
  font-family: var(--font-sans);
  font-size: 0.78rem;
  color: var(--color-text-light);
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  padding: 0.3rem 0.9rem;
  letter-spacing: 0.02em;
}

/* ---- Publications List ---- */
.pub-list {
  list-style: none;
}

.pub-item {
  padding: 1.2rem 0;
  border-bottom: 1px solid var(--color-border-light);
}

.pub-item:last-child {
  border-bottom: none;
}

.pub-year {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.3rem;
}

.pub-title {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--color-bg-dark);
  margin-bottom: 0.25rem;
  line-height: 1.4;
}

.pub-title a {
  color: var(--color-bg-dark);
}
.pub-title a:hover {
  color: var(--color-accent);
}

.pub-authors {
  font-family: var(--font-sans);
  font-size: 0.85rem;
  color: var(--color-text-light);
  margin-bottom: 0.2rem;
}

.pub-journal {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 0.92rem;
  color: var(--color-text-light);
}

.pub-status {
  font-family: var(--font-sans);
  font-size: 0.72rem;
  font-weight: 600;
  display: inline-block;
  padding: 0.15rem 0.5rem;
  margin-top: 0.4rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.pub-status.published {
  background: #e8f5e9;
  color: #2e7d32;
}

.pub-status.forthcoming {
  background: #fff8e1;
  color: #f57f17;
}

.pub-status.working {
  background: #e3f2fd;
  color: #1565c0;
}

.pub-status.rr {
  background: #fce4ec;
  color: #c62828;
}

.pub-links {
  margin-top: 0.5rem;
}

.pub-links a {
  font-family: var(--font-sans);
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--color-accent);
  margin-right: 1rem;
  letter-spacing: 0.02em;
}

.pub-links a::before {
  content: '\2192 ';
}

/* ---- Research Projects ---- */
.project-card {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border-light);
  padding: 1.8rem 2rem;
  margin-bottom: 1.5rem;
}

.project-card h3 {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--color-bg-dark);
  margin-bottom: 0.5rem;
}

.project-card .project-meta {
  font-family: var(--font-sans);
  font-size: 0.82rem;
  color: var(--color-text-muted);
  margin-bottom: 0.8rem;
}

.project-card p {
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--color-text);
}

/* ---- Teaching Table ---- */
.teaching-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  margin-top: 1rem;
  margin-bottom: 2rem;
}

.teaching-table th {
  text-align: left;
  padding: 0.8rem 1rem;
  background: var(--color-bg-dark);
  color: #ffffff;
  font-weight: 500;
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.teaching-table td {
  padding: 0.8rem 1rem;
  border-bottom: 1px solid var(--color-border-light);
  color: var(--color-text);
}

.teaching-table tr:hover td {
  background: var(--color-bg-alt);
}

/* ---- Supervision ---- */
.supervision-item {
  padding: 0.8rem 0;
  border-bottom: 1px solid var(--color-border-light);
  font-size: 0.95rem;
}

.supervision-item .student-name {
  font-weight: 600;
  color: var(--color-bg-dark);
}

.supervision-item .student-degree {
  font-family: var(--font-sans);
  font-size: 0.82rem;
  color: var(--color-text-muted);
}

.supervision-item .student-topic {
  font-style: italic;
  color: var(--color-text-light);
  font-size: 0.92rem;
}

/* ---- CV Page ---- */
.cv-download {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: 0.88rem;
  font-weight: 500;
  color: #ffffff;
  background: var(--color-bg-dark);
  padding: 0.7rem 1.8rem;
  margin-bottom: 2rem;
  transition: background 0.2s ease;
  letter-spacing: 0.03em;
}

.cv-download:hover {
  background: var(--color-accent);
  color: #ffffff;
}

.cv-section {
  margin-bottom: 2.5rem;
}

.cv-section h3 {
  font-family: var(--font-sans);
  font-size: 0.88rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-bg-dark);
  padding-bottom: 0.4rem;
  border-bottom: 2px solid var(--color-gold);
  margin-bottom: 1rem;
}

.cv-entry {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 1rem;
  padding: 0.6rem 0;
  font-size: 0.95rem;
}

.cv-entry .cv-date {
  font-family: var(--font-sans);
  font-size: 0.82rem;
  color: var(--color-text-muted);
  padding-top: 0.1rem;
}

.cv-entry .cv-detail {
  color: var(--color-text);
}

.cv-entry .cv-detail strong {
  color: var(--color-bg-dark);
}

/* ---- Conferences List ---- */
.conf-list {
  list-style: none;
}

.conf-list li {
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--color-border-light);
  font-size: 0.92rem;
}

.conf-list .conf-year {
  font-family: var(--font-sans);
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--color-text-muted);
  display: inline-block;
  width: 50px;
}

/* ---- Footer ---- */
.site-footer {
  background: var(--color-bg-dark);
  color: rgba(255,255,255,0.6);
  font-family: var(--font-sans);
  font-size: 0.78rem;
  border-top: 3px solid var(--color-gold);
}

.footer-inner {
  max-width: var(--max-width-wide);
  margin: 0 auto;
  padding: 2rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-inner a {
  color: rgba(255,255,255,0.7);
}
.footer-inner a:hover {
  color: var(--color-gold);
}

.footer-links {
  display: flex;
  gap: 1.5rem;
}

/* ---- Responsive ---- */
@media (max-width: 768px) {
  .header-inner {
    flex-direction: column;
    text-align: center;
    gap: 1rem;
  }

  .nav-toggle {
    display: block;
    position: absolute;
    right: 1.5rem;
    top: 1.5rem;
  }

  .main-nav ul {
    flex-direction: column;
    align-items: center;
  }

  .hero {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero-photo {
    width: 220px;
    margin: 0 auto;
  }

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

  .cv-entry {
    grid-template-columns: 1fr;
    gap: 0.2rem;
  }

  .footer-inner {
    flex-direction: column;
    text-align: center;
    gap: 1rem;
  }

  .institution-bar-inner {
    flex-direction: column;
    text-align: center;
    gap: 0.3rem;
  }
}

@media (max-width: 480px) {
  html {
    font-size: 15px;
  }

  .main-content {
    padding: 1.5rem 1rem 3rem;
  }

  .hero-photo {
    width: 180px;
  }

  .hero-info h1 {
    font-size: 1.6rem;
  }
}

/* ---- Utility ---- */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

.text-muted {
  color: var(--color-text-muted);
}

.mt-2 { margin-top: 2rem; }
.mb-2 { margin-bottom: 2rem; }
.mt-3 { margin-top: 3rem; }