/* ============================================
   Ishaan Barrett — Academic Portfolio
   Aesthetic: Editorial / Scholarly / Refined
   ============================================ */

:root {
  /* Color Palette — warm ivory and deep ink */
  --color-bg: #FAFAF6;
  --color-bg-alt: #F2F0EA;
  --color-ink: #1A1A1A;
  --color-ink-light: #4A4A4A;
  --color-ink-muted: #7A7A7A;
  --color-accent: #8B2500;
  --color-accent-hover: #A63000;
  --color-rule: #D4D0C8;
  --color-rule-dark: #B8B4AC;

  /* Typography */
  --font-display: 'Cormorant Garamond', Georgia, 'Times New Roman', serif;
  --font-body: 'Libre Franklin', 'Helvetica Neue', Helvetica, sans-serif;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 0.75rem;
  --space-lg: 1rem;
  --space-xl: 2rem;
  --space-2xl: 4rem;

  /* Layout */
  --max-width: 740px;
  --header-height: 72px;
}

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

html {
  font-size: 17px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  font-weight: 300;
  line-height: 1.72;
  color: var(--color-ink);
  background-color: var(--color-bg);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

/* ---- Typography ---- */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 500;
  line-height: 1.2;
  color: var(--color-ink);
}

h1 {
  font-size: 2.8rem;
  font-weight: 400;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-lg);
}

h2 {
  font-size: 1.6rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-sm);
  border-bottom: 1.5px solid var(--color-rule);
}

h3 {
  font-size: 1.15rem;
  font-weight: 600;
  font-family: var(--font-body);
  margin-bottom: var(--space-sm);
  color: var(--color-ink);
}

p {
  margin-bottom: var(--space-md);
}

strong {
  font-weight: 500;
}

em {
  font-style: italic;
}

/* ---- Header ---- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-rule);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  background: rgba(250, 250, 246, 0.92);
}

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

.site-title {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 600;
  color: var(--color-ink);
  letter-spacing: 0.01em;
  text-decoration: none;
  white-space: nowrap;
}
.site-title:hover {
  color: var(--color-accent);
}

.site-nav {
  display: flex;
  gap: var(--space-lg);
}

.nav-link {
  font-family: var(--font-body);
  font-size: 0.82rem;
  font-weight: 400;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-ink-muted);
  text-decoration: none;
  position: relative;
  padding-bottom: 2px;
}
.nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1.5px;
  background: var(--color-accent);
  transition: width 0.3s ease;
}
.nav-link:hover,
.nav-link.active {
  color: var(--color-ink);
}
.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

/* Mobile menu toggle */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  width: 28px;
  height: 20px;
  position: relative;
  flex-direction: column;
  justify-content: space-between;
}
.menu-bar {
  display: block;
  width: 100%;
  height: 1.5px;
  background: var(--color-ink);
  transition: all 0.3s ease;
}

/* ---- Main Content ---- */
.site-main {
  flex: 1;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-xl) var(--space-lg) var(--space-2xl);
  width: 100%;
}

/* ---- Page Header ---- */
.page-header {
  margin-bottom: var(--space-xl);
}

.page-header h1 {
  margin-bottom: var(--space-sm);
}

.page-subtitle {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-style: italic;
  color: var(--color-ink-muted);
  font-weight: 400;
}

/* ---- About / Index Page ---- */
.about-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: var(--space-xl);
  align-items: start;
  margin-bottom: var(--space-xl);
}

.about-sidebar {
  position: sticky;
  top: calc(var(--header-height) + var(--space-xl));
}

.headshot {
  width: 100%;
  aspect-ratio: 1;
  border-radius: 4px;
  object-fit: cover;
  object-position: center top;
  filter: grayscale(8%);
  margin-bottom: var(--space-md);
}

.sidebar-name {
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 600;
  color: var(--color-ink);
  line-height: 1.2;
  margin-bottom: var(--space-sm);
}

.sidebar-categories {
  font-family: var(--font-body);
  font-size: 0.78rem;
  font-weight: 400;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-ink-muted);
  line-height: 1.6;
}

.sidebar-categories span {
  display: block;
}

.sidebar-divider {
  width: 32px;
  height: 1.5px;
  background: var(--color-rule-dark);
  margin: var(--space-md) 0;
}

.sidebar-links {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.sidebar-links a {
  font-size: 0.82rem;
  color: var(--color-ink-muted);
  transition: color 0.2s;
}

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

.about-content h1 {
  display: none;
}

.about-intro {
  font-family: var(--font-display);
  font-size: 1.45rem;
  line-height: 1.55;
  font-weight: 400;
  color: var(--color-ink);
  margin-bottom: var(--space-xl);
  max-width: 640px;
}

.about-body {
  columns: 1;
}

.about-body p {
  color: var(--color-ink-light);
}

.about-affiliations {
  margin-top: var(--space-xl);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--color-rule);
}

.affiliation-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md) var(--space-xl);
  margin-top: var(--space-md);
}

.affiliation-item {
  font-size: 0.88rem;
  color: var(--color-ink-light);
  line-height: 1.5;
}

.affiliation-item strong {
  display: block;
  font-weight: 500;
  color: var(--color-ink);
  font-size: 0.9rem;
}

/* ---- Section Blocks ---- */
.section-block {
  margin-bottom: var(--space-xl);
}

.section-block:last-child {
  margin-bottom: 0;
}

/* ---- CV Page ---- */
.cv-download {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 0.85rem;
  font-weight: 400;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-accent);
  border: 1px solid var(--color-accent);
  padding: var(--space-sm) var(--space-md);
  margin-bottom: var(--space-xl);
  transition: all 0.2s ease;
}
.cv-download:hover {
  background: var(--color-accent);
  color: #fff;
}
.cv-download svg {
  width: 14px;
  height: 14px;
}

.cv-entry {
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-lg);
  border-bottom: 1px solid var(--color-rule);
}
.cv-entry:last-child {
  border-bottom: none;
}

.cv-entry-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-bottom: var(--space-xs);
}

.cv-entry-title {
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 500;
  color: var(--color-ink);
}

.cv-entry-date {
  font-size: 0.82rem;
  color: var(--color-ink-muted);
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
}

.cv-entry-org {
  font-size: 0.9rem;
  color: var(--color-ink-light);
  margin-bottom: var(--space-xs);
}

.cv-entry-role {
  font-family: var(--font-display);
  font-size: 1rem;
  font-style: italic;
  color: var(--color-ink-muted);
  margin-bottom: var(--space-sm);
}

.cv-entry-desc {
  font-size: 0.92rem;
  color: var(--color-ink-light);
  line-height: 1.65;
}

/* ---- Publications Page ---- */
.pub-item {
  margin-bottom: var(--space-lg);
  padding-left: var(--space-lg);
  position: relative;
}
.pub-item::before {
  content: '';
  position: absolute;
  left: 0;
  top: 6px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-rule-dark);
}
.pub-item.forthcoming::before {
  background: var(--color-accent);
}

.pub-title {
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 500;
  color: var(--color-ink);
  margin-bottom: 2px;
}

.pub-authors {
  font-size: 0.88rem;
  color: var(--color-ink-muted);
  margin-bottom: 2px;
}

.pub-journal {
  font-family: var(--font-display);
  font-size: 1rem;
  font-style: italic;
  color: var(--color-ink-light);
}

.pub-status {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
  background: rgba(139, 37, 0, 0.06);
  padding: 2px 8px;
  border-radius: 2px;
  margin-left: var(--space-sm);
  vertical-align: middle;
}

/* ---- Talks Page ---- */
.talk-item {
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-lg);
  border-bottom: 1px solid var(--color-rule);
}
.talk-item:last-child {
  border-bottom: none;
}

.talk-date {
  font-size: 0.8rem;
  font-weight: 400;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--color-ink-muted);
  margin-bottom: var(--space-xs);
  font-variant-numeric: tabular-nums;
}

.talk-title {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 500;
  color: var(--color-ink);
  margin-bottom: 4px;
}

.talk-venue {
  font-size: 0.9rem;
  color: var(--color-ink-light);
}

.talk-note {
  font-size: 0.85rem;
  font-style: italic;
  color: var(--color-ink-muted);
  margin-top: 4px;
}

/* ---- Editorial Items ---- */
.editorial-item {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: var(--space-md);
  padding: var(--space-sm) 0;
  border-bottom: 1px solid var(--color-rule);
}
.editorial-item:last-child {
  border-bottom: none;
}

.editorial-title {
  font-size: 0.95rem;
  color: var(--color-ink);
  flex: 1;
}

.editorial-pub {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 0.9rem;
  color: var(--color-ink-muted);
}

.editorial-date {
  font-size: 0.82rem;
  color: var(--color-ink-muted);
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
}

/* ---- Contact Page ---- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  margin-top: var(--space-lg);
}

.contact-block h3 {
  font-family: var(--font-body);
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-ink-muted);
  margin-bottom: var(--space-sm);
}

.contact-block p,
.contact-block a {
  font-size: 1rem;
  color: var(--color-ink);
  line-height: 1.6;
}

/* ---- Awards ---- */
.award-item {
  padding: var(--space-sm) 0;
  border-bottom: 1px solid var(--color-rule);
  font-size: 0.92rem;
  color: var(--color-ink-light);
  line-height: 1.55;
}
.award-item:last-child {
  border-bottom: none;
}

/* ---- Footer ---- */
.site-footer {
  border-top: 1px solid var(--color-rule);
  margin-top: auto;
}

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

.footer-name {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 500;
  color: var(--color-ink);
  margin-bottom: 2px;
}

.footer-affiliation {
  font-size: 0.82rem;
  color: var(--color-ink-muted);
}

.footer-right p {
  font-size: 0.78rem;
  color: var(--color-ink-muted);
}

/* ---- Fade-in Animation ---- */
@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.site-main {
  animation: fadeUp 0.5s ease-out;
}

/* ---- Responsive ---- */
@media (max-width: 768px) {
  html { font-size: 16px; }

  .header-inner {
    padding: 0 var(--space-md);
  }

  .menu-toggle {
    display: flex;
  }

  .site-nav {
    display: none;
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-rule);
    flex-direction: column;
    padding: var(--space-md) var(--space-lg);
    gap: var(--space-md);
  }

  .site-nav.open {
    display: flex;
  }

  .site-main {
    padding: var(--space-lg) var(--space-md) var(--space-xl);
  }

  h1 { font-size: 2.2rem; }

  .about-intro { font-size: 1.25rem; }

  .about-layout {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }

  .about-sidebar {
    position: static;
    display: flex;
    gap: var(--space-lg);
    align-items: center;
  }

  .headshot {
    width: 140px;
    min-width: 140px;
    aspect-ratio: 1;
    margin-bottom: 0;
  }

  .sidebar-divider { display: none; }
  .sidebar-links { display: none; }

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

  .contact-grid {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }

  .cv-entry-header {
    flex-direction: column;
    gap: 2px;
  }

  .editorial-item {
    flex-direction: column;
    gap: 2px;
  }

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-md);
    padding: var(--space-md);
  }
}

@media (max-width: 480px) {
  h1 { font-size: 1.9rem; }
  .site-title { font-size: 1.15rem; }
}