/* ============================================================
   Design System — Daniel Worrall Academic Site
   Theme: Warm academic aesthetic with serif typography
   All colors in CSS custom properties for easy theme swapping.
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Crimson+Pro:ital,wght@0,300;0,400;0,500;0,600;0,700;1,300;1,400;1,500&family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

/* ── Theme Variables ──────────────────────────────────────── */
:root {
  /* Dark theme (default) — scholarly slate */
  --bg-primary: #1c1e26;
  --bg-secondary: #191b22;
  --bg-card: rgba(255, 255, 255, 0.035);
  --bg-card-hover: rgba(255, 255, 255, 0.065);
  --bg-glass: rgba(28, 30, 38, 0.88);

  --text-primary: #f0ece7;
  --text-secondary: #b5afa8;
  --text-muted: #807a74;

  --accent-primary: #d4956b;
  /* Warm copper */
  --accent-glow: rgba(212, 149, 107, 0.12);
  --accent-secondary: #7ea88e;
  /* Sage green */
  --accent-tertiary: #b8a0d0;
  /* Soft lavender */
  --accent-warm: #d4956b;

  --border-color: rgba(255, 255, 255, 0.07);
  --border-accent: rgba(212, 149, 107, 0.25);

  --gradient-hero: linear-gradient(160deg, #1c1e26 0%, #191b22 50%, #1c1e26 100%);
  --gradient-card: linear-gradient(135deg, rgba(212, 149, 107, 0.03), rgba(126, 168, 142, 0.03));
  --gradient-accent: linear-gradient(135deg, #d4956b, #7ea88e);

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.25);
  --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.3);
  --shadow-glow: 0 0 40px rgba(212, 149, 107, 0.06);

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 24px;
  --radius-full: 9999px;

  --font-serif: 'Crimson Pro', 'Georgia', 'Cambria', 'Times New Roman', serif;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;

  --transition-fast: 0.15s ease;
  --transition-mid: 0.3s ease;
  --transition-slow: 0.5s ease;
}

[data-theme="light"] {
  --bg-primary: #faf7f4;
  --bg-secondary: #ffffff;
  --bg-card: rgba(0, 0, 0, 0.02);
  --bg-card-hover: rgba(0, 0, 0, 0.04);
  --bg-glass: rgba(250, 247, 244, 0.92);

  --text-primary: #2c2a28;
  --text-secondary: #5a5654;
  --text-muted: #8c8886;

  --accent-primary: #9a5d34;
  --accent-glow: rgba(154, 93, 52, 0.07);
  --accent-secondary: #4d7a5a;
  --accent-tertiary: #7a5c8f;

  --border-color: rgba(0, 0, 0, 0.08);
  --border-accent: rgba(154, 93, 52, 0.2);

  --gradient-hero: linear-gradient(160deg, #faf7f4 0%, #f0ebe4 50%, #faf7f4 100%);
  --gradient-card: linear-gradient(135deg, rgba(154, 93, 52, 0.02), rgba(77, 122, 90, 0.02));

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.08);
  --shadow-glow: 0 0 40px rgba(154, 93, 52, 0.04);
}


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

html {
  scroll-behavior: smooth;
  font-size: 17px;
}

body {
  font-family: var(--font-serif);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  transition: background var(--transition-mid), color var(--transition-mid);
}

a {
  color: var(--accent-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--accent-secondary);
}

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

::selection {
  background: var(--accent-primary);
  color: #fff;
}


/* ── Navigation ───────────────────────────────────────────── */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 0 2rem;
  transition: background var(--transition-mid), box-shadow var(--transition-mid);
}

.nav.scrolled {
  background: var(--bg-glass);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  box-shadow: 0 1px 0 var(--border-color);
}

.nav__inner {
  max-width: 1000px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.nav__logo {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 1.15rem;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.nav__logo span {
  color: var(--accent-primary);
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 0.15rem;
  list-style: none;
}

.nav__links a {
  font-family: var(--font-sans);
  color: var(--text-secondary);
  font-size: 0.82rem;
  font-weight: 450;
  padding: 0.45rem 0.85rem;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  position: relative;
  letter-spacing: 0.01em;
}

.nav__links a:hover,
.nav__links a.active {
  color: var(--text-primary);
  background: var(--accent-glow);
}

.nav__links a.active::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 50%;
  transform: translateX(-50%);
  width: 16px;
  height: 2px;
  background: var(--accent-primary);
  border-radius: 1px;
}

.nav__theme-toggle {
  background: none;
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  cursor: pointer;
  padding: 0.45rem;
  border-radius: var(--radius-sm);
  font-size: 1rem;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
}

.nav__theme-toggle:hover {
  color: var(--accent-primary);
  border-color: var(--accent-primary);
}

.nav__hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  color: var(--text-primary);
}

.nav__hamburger span {
  display: block;
  width: 20px;
  height: 2px;
  background: currentColor;
  margin: 5px 0;
  transition: all var(--transition-fast);
  border-radius: 1px;
}


/* ── Canvas Background ────────────────────────────────────── */
#neural-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  opacity: 0.2;
}

[data-theme="light"] #neural-canvas {
  opacity: 0.08;
}


/* ── Layout ───────────────────────────────────────────────── */
.container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 2rem;
}

.page-content {
  min-height: 100vh;
  padding-top: 64px;
}

section {
  padding: 4rem 0;
}


/* ── Hero Section ─────────────────────────────────────────── */
.hero {
  padding: 5rem 0 3rem;
  position: relative;
}

.hero__grid {
  display: grid;
  grid-template-columns: 1fr 240px;
  gap: 4rem;
  align-items: center;
}

.hero__greeting {
  font-family: var(--font-sans);
  font-size: 0.8rem;
  color: var(--accent-secondary);
  margin-bottom: 0.5rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-weight: 500;
}

.hero__name {
  font-family: var(--font-serif);
  font-size: 3.2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.1;
  margin-bottom: 0.6rem;
}

.hero__name .accent {
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero__role {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  color: var(--text-secondary);
  font-weight: 400;
  margin-bottom: 1.5rem;
  font-style: italic;
}

.hero__role strong {
  color: var(--text-primary);
  font-weight: 500;
  font-style: normal;
}

.hero__bio {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.8;
  margin-bottom: 1.75rem;
  max-width: 580px;
}

.hero__links {
  display: flex;
  gap: 0.6rem;
  flex-wrap: wrap;
}

.hero__links a {
  font-family: var(--font-sans);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--text-secondary);
  font-size: 0.8rem;
  padding: 0.4rem 0.9rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
}

.hero__links a:hover {
  color: var(--accent-primary);
  border-color: var(--accent-primary);
  background: var(--accent-glow);
}

.hero__photo-wrapper {
  display: flex;
  justify-content: center;
}

.hero__photo {
  width: 200px;
  height: 200px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--border-color);
  box-shadow: var(--shadow-lg);
  transition: all var(--transition-mid);
}

.hero__photo:hover {
  border-color: var(--accent-primary);
  box-shadow: var(--shadow-glow);
  transform: scale(1.02);
}


/* ── Research Interests ───────────────────────────────────── */
.interests {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-bottom: 1.75rem;
}

.tag {
  font-family: var(--font-sans);
  font-size: 0.72rem;
  font-weight: 500;
  padding: 0.3rem 0.75rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-accent);
  color: var(--accent-primary);
  background: var(--accent-glow);
  transition: all var(--transition-fast);
  cursor: default;
  letter-spacing: 0.01em;
}

.tag:hover {
  background: var(--accent-primary);
  color: #fff;
  border-color: var(--accent-primary);
}

.tag--cyan {
  border-color: rgba(126, 168, 142, 0.3);
  color: var(--accent-secondary);
  background: rgba(126, 168, 142, 0.08);
}

.tag--cyan:hover {
  background: var(--accent-secondary);
  border-color: var(--accent-secondary);
}

.tag--purple {
  border-color: rgba(180, 155, 200, 0.3);
  color: var(--accent-tertiary);
  background: rgba(180, 155, 200, 0.08);
}

.tag--purple:hover {
  background: var(--accent-tertiary);
  border-color: var(--accent-tertiary);
}


/* ── Section Headers ──────────────────────────────────────── */
.section-header {
  margin-bottom: 2.5rem;
}

.section-header__label {
  font-family: var(--font-sans);
  font-size: 0.72rem;
  color: var(--accent-primary);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 0.4rem;
  font-weight: 600;
}

.section-header__title {
  font-family: var(--font-serif);
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.section-header__line {
  width: 36px;
  height: 2px;
  background: var(--gradient-accent);
  border-radius: 2px;
  margin-top: 0.75rem;
}


/* ── Blog Cards ───────────────────────────────────────────── */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
}

.blog-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.6rem;
  transition: all var(--transition-mid);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.blog-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-accent);
  opacity: 0;
  transition: opacity var(--transition-mid);
}

.blog-card:hover {
  border-color: var(--border-accent);
  background: var(--bg-card-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

.blog-card:hover::before {
  opacity: 1;
}

.blog-card__date {
  font-family: var(--font-sans);
  font-size: 0.72rem;
  color: var(--accent-secondary);
  margin-bottom: 0.6rem;
  letter-spacing: 0.02em;
  font-weight: 500;
}

.blog-card__title {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 0.6rem;
  line-height: 1.35;
}

.blog-card__title a {
  color: var(--text-primary);
}

.blog-card__title a:hover {
  color: var(--accent-primary);
}

.blog-card__excerpt {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.65;
  flex: 1;
}

.blog-card__tags {
  display: flex;
  gap: 0.35rem;
  flex-wrap: wrap;
  margin-top: 0.9rem;
}

.blog-card__tag {
  font-family: var(--font-sans);
  font-size: 0.62rem;
  padding: 0.18rem 0.55rem;
  border-radius: var(--radius-full);
  background: rgba(212, 149, 107, 0.06);
  color: var(--text-muted);
  border: 1px solid var(--border-color);
  letter-spacing: 0.02em;
}


/* ── Publication Cards ────────────────────────────────────── */
.pub-list {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.pub-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.35rem 1.6rem;
  transition: all var(--transition-mid);
  position: relative;
}

.pub-card:hover {
  border-color: var(--border-accent);
  background: var(--bg-card-hover);
  box-shadow: var(--shadow-glow);
}

.pub-card__year {
  font-family: var(--font-sans);
  font-size: 0.72rem;
  color: var(--accent-secondary);
  font-weight: 600;
  margin-bottom: 0.3rem;
  letter-spacing: 0.02em;
}

.pub-card__title {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 0.35rem;
  line-height: 1.4;
}

.pub-card__title a {
  color: var(--text-primary);
}

.pub-card__title a:hover {
  color: var(--accent-primary);
}

.pub-card__authors {
  font-family: var(--font-sans);
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-bottom: 0.3rem;
}

.pub-card__authors .me {
  color: var(--accent-primary);
  font-weight: 600;
}

.pub-card__venue {
  font-family: var(--font-serif);
  font-size: 0.82rem;
  color: var(--text-muted);
  font-style: italic;
}

.pub-card__links {
  display: flex;
  gap: 0.6rem;
  margin-top: 0.65rem;
}

.pub-card__link {
  font-family: var(--font-sans);
  font-size: 0.72rem;
  color: var(--accent-primary);
  padding: 0.25rem 0.65rem;
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  font-weight: 500;
}

.pub-card__link:hover {
  background: var(--accent-primary);
  color: #fff;
  border-color: var(--accent-primary);
}

.pub-card__cite-badge {
  font-family: var(--font-sans);
  font-size: 0.72rem;
  color: var(--text-secondary);
  padding: 0.25rem 0.65rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  font-weight: 500;
  margin-left: auto;
}

.pub-card__cite-badge:hover {
  color: var(--accent-primary);
  border-color: var(--accent-primary);
}

/* Year divider in publications */
.pub-year-divider {
  font-family: var(--font-serif);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text-muted);
  padding: 2rem 0 0.6rem;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 0.8rem;
}

.pub-year-divider:first-child {
  padding-top: 0;
}


/* ── Talk Cards ───────────────────────────────────────────── */
.talk-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.35rem 1.6rem;
  transition: all var(--transition-mid);
  margin-bottom: 0.8rem;
}

.talk-card:hover {
  border-color: var(--border-accent);
  background: var(--bg-card-hover);
  box-shadow: var(--shadow-glow);
}

.talk-card__date {
  font-family: var(--font-sans);
  font-size: 0.72rem;
  color: var(--accent-secondary);
  margin-bottom: 0.35rem;
  font-weight: 500;
  letter-spacing: 0.02em;
}

.talk-card__title {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.35rem;
  color: var(--text-primary);
}

.talk-card__venue {
  font-size: 0.92rem;
  color: var(--text-secondary);
  margin-bottom: 0.2rem;
}

.talk-card__location {
  font-size: 0.82rem;
  color: var(--text-muted);
}

.talk-card__links {
  display: flex;
  gap: 0.6rem;
  margin-top: 0.65rem;
}


/* ── Teaching ─────────────────────────────────────────────── */
.course-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  margin-bottom: 1.25rem;
  transition: all var(--transition-mid);
}

.course-card:hover {
  border-color: var(--border-accent);
  box-shadow: var(--shadow-glow);
}

.course-card__title {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 0.4rem;
}

.course-card__meta {
  font-family: var(--font-sans);
  font-size: 0.82rem;
  color: var(--text-secondary);
  margin-bottom: 1rem;
  line-height: 1.7;
}

.course-card__meta span {
  display: block;
}

.lecture-list {
  list-style: none;
  padding: 0;
}

.lecture-list li {
  padding: 0.7rem 0;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: flex-start;
  gap: 0.9rem;
}

.lecture-list li:last-child {
  border-bottom: none;
}

.lecture-list__num {
  font-family: var(--font-sans);
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--accent-primary);
  min-width: 22px;
  padding-top: 0.15rem;
}

.lecture-list__content {
  flex: 1;
}

.lecture-list__title {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 0.95rem;
  margin-bottom: 0.2rem;
}

.lecture-list__desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.lecture-list__link {
  font-family: var(--font-sans);
  font-size: 0.72rem;
  color: var(--accent-primary);
  margin-left: 0.5rem;
  font-weight: 500;
}


/* ── News Timeline ────────────────────────────────────────── */
.news-list {
  list-style: none;
  padding: 0;
  position: relative;
}

.news-list::before {
  content: '';
  position: absolute;
  left: 5px;
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: var(--border-color);
}

.news-item {
  display: flex;
  gap: 1.15rem;
  padding: 0.65rem 0;
  position: relative;
}

.news-item__dot {
  width: 11px;
  height: 11px;
  min-width: 11px;
  border-radius: 50%;
  border: 2px solid var(--accent-primary);
  background: var(--bg-primary);
  margin-top: 0.4rem;
  z-index: 1;
  transition: background var(--transition-mid);
}

.news-item:first-child .news-item__dot {
  background: var(--accent-primary);
}

.news-item__date {
  font-family: var(--font-sans);
  font-size: 0.72rem;
  color: var(--accent-secondary);
  min-width: 85px;
  font-weight: 500;
  letter-spacing: 0.02em;
}

.news-item__text {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.55;
}

.news-item__text strong {
  color: var(--text-primary);
}

.news-item__text a {
  color: var(--accent-primary);
}


/* ── Bio Timeline ─────────────────────────────────────────── */
.bio-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}

.bio-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.15rem 1.35rem;
}

.bio-card__years {
  font-family: var(--font-sans);
  font-size: 0.72rem;
  color: var(--accent-primary);
  margin-bottom: 0.25rem;
  font-weight: 600;
}

.bio-card__title {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 1rem;
  margin-bottom: 0.2rem;
}

.bio-card__desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.55;
}


/* ── Students List ────────────────────────────────────────── */
.students-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.65rem;
}

.student-item {
  font-size: 0.85rem;
  padding: 0.7rem 0.9rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
}

.student-item__name {
  font-family: var(--font-serif);
  font-weight: 600;
  color: var(--text-primary);
}

.student-item__topic {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  color: var(--text-secondary);
  margin-top: 0.15rem;
}


/* ── Footer ───────────────────────────────────────────────── */
.footer {
  border-top: 1px solid var(--border-color);
  padding: 2.5rem 0;
  text-align: center;
}

.footer__text {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  color: var(--text-muted);
}

.footer__links {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  margin-bottom: 0.75rem;
}

.footer__links a {
  font-family: var(--font-sans);
  color: var(--text-muted);
  font-size: 0.8rem;
  transition: color var(--transition-fast);
}

.footer__links a:hover {
  color: var(--accent-primary);
}


/* ── Scroll Reveal ────────────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}


/* ── Responsive ───────────────────────────────────────────── */
@media (max-width: 900px) {
  .hero__grid {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 2rem;
  }

  .hero__grid>.hero__photo-wrapper {
    order: -1;
  }

  .hero__bio {
    max-width: 100%;
  }

  .hero__links {
    justify-content: center;
  }

  .interests {
    justify-content: center;
  }

  .hero__name {
    font-size: 2.5rem;
  }

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

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

  .students-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .nav__links {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    flex-direction: column;
    padding: 1rem;
    gap: 0;
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-mid);
  }

  .nav__links.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav__links a {
    padding: 0.75rem 1rem;
    font-size: 0.95rem;
    width: 100%;
  }

  .nav__hamburger {
    display: block;
  }

  .container {
    padding: 0 1.25rem;
  }

  section {
    padding: 2.5rem 0;
  }

  .hero {
    padding: 3rem 0 2rem;
  }

  .hero__name {
    font-size: 2rem;
  }

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

/* ── Blog Post Article ────────────────────────────────────── */
.blog-post {
  max-width: 720px;
  margin: 0 auto;
  padding: 4rem 0 3rem;
}

.blog-post__header {
  margin-bottom: 2.5rem;
}

.blog-post__title {
  font-family: var(--font-serif);
  font-size: 2.4rem;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.01em;
  margin-bottom: 1rem;
}

.blog-post__meta {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.blog-post__meta time {
  font-family: var(--font-sans);
  font-size: 0.82rem;
  color: var(--text-muted);
  font-weight: 500;
}

.blog-post__content {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  line-height: 1.85;
  color: var(--text-secondary);
}

.blog-post__content h2 {
  font-family: var(--font-serif);
  font-size: 1.65rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-top: 2.5rem;
  margin-bottom: 1rem;
}

.blog-post__content h3 {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-top: 2rem;
  margin-bottom: 0.75rem;
}

.blog-post__content p {
  margin-bottom: 1.2rem;
}

.blog-post__content a {
  color: var(--accent-primary);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.blog-post__content a:hover {
  color: var(--accent-secondary);
}

.blog-post__content img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-sm);
  margin: 1rem 0;
}

/* Invert black-on-white diagrams in dark mode */
:root:not([data-theme="light"]) .blog-post__content img[src$=".svg"] {
  filter: invert(0.88);
}

.blog-post__content blockquote {
  border-left: 3px solid var(--accent-primary);
  padding: 0.8rem 1.2rem;
  margin: 1.5rem 0;
  background: var(--bg-card);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-style: italic;
  color: var(--text-secondary);
}

.blog-post__content blockquote p {
  margin-bottom: 0;
}

.blog-post__content pre {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 1.2rem 1.4rem;
  margin: 1.5rem 0;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.6;
  color: var(--text-primary);
}

.blog-post__content code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  padding: 0.15rem 0.4rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  color: var(--accent-primary);
}

.blog-post__content pre code {
  padding: 0;
  background: none;
  border: none;
  border-radius: 0;
  color: inherit;
  font-size: inherit;
}

/* Prism.js overrides — use site palette instead of default white */
.blog-post__content pre[class*="language-"],
.blog-post__content code[class*="language-"] {
  background: var(--bg-secondary) !important;
  color: var(--text-primary) !important;
  font-size: 0.85rem !important;
  line-height: 1.6 !important;
}

:root:not([data-theme="light"]) .token.comment,
:root:not([data-theme="light"]) .token.prolog,
:root:not([data-theme="light"]) .token.doctype {
  color: #8292a2 !important;
}

:root:not([data-theme="light"]) .token.keyword {
  color: #c792ea !important;
}

:root:not([data-theme="light"]) .token.function {
  color: #82aaff !important;
}

:root:not([data-theme="light"]) .token.string {
  color: #c3e88d !important;
}

:root:not([data-theme="light"]) .token.number {
  color: #f78c6c !important;
}

:root:not([data-theme="light"]) .token.operator {
  color: #89ddff !important;
  background: none !important;
}


:root:not([data-theme="light"]) .token.builtin {
  color: #ffcb6b !important;
}

:root:not([data-theme="light"]) .token.class-name {
  color: #ffcb6b !important;
}

:root:not([data-theme="light"]) .token.boolean {
  color: #f78c6c !important;
}

:root:not([data-theme="light"]) .token.punctuation {
  color: #bfc7d5 !important;
}

.blog-post__content ul,
.blog-post__content ol {
  padding-left: 1.5rem;
  margin-bottom: 1.2rem;
}

.blog-post__content li {
  margin-bottom: 0.4rem;
}

.blog-post__content em {
  color: var(--text-primary);
}

.blog-post__content strong {
  color: var(--text-primary);
  font-weight: 700;
}

/* MathJax overrides — horizontal scroll on narrow screens */
.blog-post__content .MathJax {
  font-size: 1em !important;
}

.blog-post__content details {
  margin: 1.5rem 0;
  border: 1px solid var(--text-secondary);
  border-radius: 12px;
  padding: 0 1.4rem;
  background: rgba(128, 128, 128, 0.04);
}

.blog-post__content details[open] {
  padding-bottom: 1rem;
}

.blog-post__content details summary {
  cursor: pointer;
  padding: 0.8rem 0;
  font-weight: 600;
  font-style: italic;
  color: var(--text-secondary);
  list-style: none;
}

.blog-post__content details summary::before {
  content: '▸ ';
}

.blog-post__content details[open] summary::before {
  content: '▾ ';
}

.blog-post__content details summary::-webkit-details-marker {
  display: none;
}

mjx-container[jax="output-chtml"][display="true"] {
  overflow-x: auto;
  overflow-y: hidden;
  max-width: 100%;
  padding: 0.4rem 0;
  -webkit-overflow-scrolling: touch;
}

@media (max-width: 640px) {
  .blog-post__title {
    font-size: 1.8rem;
  }

  .blog-post__content {
    font-size: 0.98rem;
  }
}


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

.text-gradient {
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}