/* =====================================================
   cngautam.com — Balanced Academic Style
   White background · Lora serif · Single terracotta accent
   ===================================================== */

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

:root {
  --accent:       #b36a3a;
  --accent-dk:    #8a4e27;
  --accent-lt:    #c9956a;
  --accent-pale:  #f5ede4;
  --text-primary: #1a1008;
  --text-mid:     #3a2510;
  --text-muted:   #6b5040;
  --text-faint:   #9a7a68;
  --border:       rgba(58, 37, 16, 0.12);
  --border-md:    rgba(58, 37, 16, 0.22);
  --bg:           #ffffff;
  --bg-tinted:    #faf6f2;
  --bg-dark:      #1e1208;
  --bg-dark-mid:  #2e1c0e;
  --font-serif:   'Lora', Georgia, serif;
  --font-sans:    'DM Sans', system-ui, sans-serif;
  --radius:       8px;
  --radius-lg:    14px;
  --shadow:       0 2px 16px rgba(58, 37, 16, 0.07);
  --transition:   all 0.22s ease;
}

html { scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-mid);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
p { margin-bottom: 1rem; }
p:last-child { margin-bottom: 0; }

.container { max-width: 1080px; margin: 0 auto; padding: 0 36px; }

/* --- Typography --- */
h1, h2, h3, h4 { font-family: var(--font-serif); color: var(--text-primary); line-height: 1.25; }
h1 { font-size: clamp(2rem, 4.5vw, 2.8rem); font-weight: 600; }
h2 { font-size: clamp(1.5rem, 3vw, 2.1rem); font-weight: 600; }
h3 { font-size: 1.15rem; font-weight: 600; }
h4 { font-size: 1rem; font-weight: 600; }
em { font-style: italic; color: var(--accent); }

/* --- Buttons --- */
.btn-primary {
  display: inline-block;
  background: var(--text-primary);
  color: #fff;
  padding: 11px 26px;
  border-radius: 5px;
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.02em;
  transition: var(--transition);
  border: 2px solid var(--text-primary);
}
.btn-primary:hover { background: var(--text-mid); border-color: var(--text-mid); transform: translateY(-1px); }

.btn-secondary {
  display: inline-block;
  background: transparent;
  color: var(--text-mid);
  padding: 10px 24px;
  border-radius: 5px;
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 500;
  border: 1px solid var(--border-md);
  transition: var(--transition);
}
.btn-secondary:hover { border-color: var(--accent-lt); color: var(--accent); }

.btn-text {
  display: inline-block;
  color: var(--accent);
  font-size: 14px;
  font-weight: 500;
  border-bottom: 1px solid transparent;
  transition: var(--transition);
  padding-bottom: 1px;
}
.btn-text:hover { border-bottom-color: var(--accent); }

/* --- Sections --- */
.section { padding: 88px 0; background: var(--bg); }
.section-tinted { background: var(--bg-tinted); }
.section-dark { background: var(--bg-dark); color: #ddd0c4; }

.section-label {
  font-family: var(--font-sans);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 10px;
}
.section-label.light { color: var(--accent-lt); }

.section-heading { margin-bottom: 32px; }
.section-heading.light { color: #f0e4d8; }
.section-heading.light em { color: var(--accent-lt); }

.section-intro {
  max-width: 620px;
  color: var(--text-muted);
  margin-bottom: 48px;
  font-size: 15px;
}

/* Tags */
.tag {
  display: inline-block;
  background: var(--bg-tinted);
  color: var(--text-muted);
  font-size: 12px;
  padding: 4px 12px;
  border-radius: 20px;
  margin: 0 4px 6px 0;
  border: 1px solid var(--border);
}
.tag-sm {
  display: inline-block;
  background: var(--accent-pale);
  color: var(--accent-dk);
  font-size: 10px;
  padding: 2px 9px;
  border-radius: 20px;
  margin: 0 3px 3px 0;
  font-weight: 500;
  border: 1px solid rgba(179,106,58,0.15);
}

/* =====================================================
   NAVIGATION
   ===================================================== */
#site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  transition: box-shadow 0.3s ease;
}
#site-header.scrolled { box-shadow: var(--shadow); }

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.nav-brand {
  font-family: var(--font-serif);
  font-size: 16px;
  color: var(--text-primary);
  font-weight: 600;
}
.nav-brand em { color: var(--accent); font-style: italic; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 2px;
}
.nav-links a {
  font-size: 13px;
  color: var(--text-muted);
  padding: 6px 12px;
  border-radius: 5px;
  transition: var(--transition);
}
.nav-links a:hover { color: var(--text-primary); background: var(--bg-tinted); }
.nav-links a.nav-cta {
  color: var(--text-primary);
  font-weight: 500;
  border-bottom: 1.5px solid var(--accent-lt);
  border-radius: 0;
  padding-bottom: 3px;
}
.nav-links a.nav-cta:hover { color: var(--accent); border-bottom-color: var(--accent); background: transparent; }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 1.5px;
  background: var(--text-primary);
  border-radius: 2px;
}

/* =====================================================
   HERO
   ===================================================== */
.hero {
  padding: 148px 0 88px;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}

.hero-inner {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 72px;
  align-items: center;
}

.hero-rule {
  width: 28px;
  height: 3px;
  background: var(--accent);
  border-radius: 2px;
  margin-bottom: 16px;
}

.hero-eyebrow {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
}

.hero h1 { margin-bottom: 20px; }
.hero h1 em { font-weight: 400; }

.hero-desc {
  font-size: 15px;
  color: var(--text-muted);
  max-width: 500px;
  margin-bottom: 24px;
}

.hero-tags { margin-bottom: 32px; }
.hero-actions { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }

.photo-frame {
  width: 200px;
  height: 248px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--bg-tinted);
}
.photo-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}
.initials {
  font-family: var(--font-serif);
  font-size: 48px;
  font-weight: 600;
  color: var(--accent-lt);
  letter-spacing: -0.02em;
}
.photo-note {
  font-size: 11px;
  color: var(--text-faint);
  margin-top: 8px;
  letter-spacing: 0.04em;
}

/* =====================================================
   ABOUT
   ===================================================== */
.section-grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 72px;
  align-items: start;
}

.about-left p { color: var(--text-muted); font-size: 15px; margin-bottom: 16px; }

.about-card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 16px;
  background: var(--bg-tinted);
}
.about-card h3 {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 14px;
  font-family: var(--font-sans);
  font-weight: 500;
}
.about-list li {
  font-size: 14px;
  color: var(--text-mid);
  padding: 6px 0 6px 14px;
  border-bottom: 1px solid var(--border);
  position: relative;
}
.about-list li::before {
  content: '';
  position: absolute;
  left: 0; top: 50%;
  transform: translateY(-50%);
  width: 4px; height: 4px;
  background: var(--accent-lt);
  border-radius: 50%;
}
.about-list li:last-child { border-bottom: none; }

/* =====================================================
   RESEARCH
   ===================================================== */
.research-interests {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 56px;
}
.interest-item {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px 18px;
  background: var(--bg);
  transition: var(--transition);
}
.interest-item:hover { border-color: var(--accent-lt); transform: translateY(-2px); box-shadow: var(--shadow); }
.interest-icon { font-size: 12px; color: var(--accent); margin-bottom: 10px; }
.interest-item h4 { font-size: 14px; margin-bottom: 8px; line-height: 1.3; }
.interest-item p { font-size: 13px; color: var(--text-muted); }

.subsection-heading {
  font-size: 11px;
  font-family: var(--font-sans);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent);
  margin-bottom: 20px;
}

.pubs-list { max-width: 800px; }

.pub-entry {
  display: grid;
  grid-template-columns: 52px 1fr;
  gap: 20px;
  padding: 18px 0;
  border-bottom: 1px solid var(--border);
  align-items: start;
}
.pub-entry:last-child { border-bottom: none; }

.pub-year {
  font-size: 11px;
  font-weight: 500;
  color: var(--accent);
  padding-top: 3px;
  letter-spacing: 0.03em;
}
.pub-ref {
  font-size: 14px;
  color: var(--text-mid);
  line-height: 1.65;
  margin-bottom: 8px;
}
.pub-ref em { color: var(--text-muted); }

.pubs-note {
  font-size: 12px;
  color: var(--text-faint);
  margin-top: 20px;
  font-style: italic;
}

/* =====================================================
   TEACHING
   ===================================================== */
.courses-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 56px;
}
.course-card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 20px;
  background: var(--bg-tinted);
  transition: var(--transition);
}
.course-card:hover { border-color: var(--accent-lt); box-shadow: var(--shadow); }
.course-code {
  display: inline-block;
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--accent);
  background: var(--accent-pale);
  padding: 3px 10px;
  border-radius: 4px;
  margin-bottom: 12px;
  font-family: var(--font-sans);
  border: 1px solid rgba(179,106,58,0.15);
}
.course-card h4 { margin-bottom: 8px; font-size: 15px; }
.course-card p { font-size: 13px; color: var(--text-muted); }

.advising-block {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 48px;
  align-items: center;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px;
  background: var(--bg-tinted);
}
.advising-text h3 { margin-bottom: 14px; }
.advising-text p { font-size: 15px; color: var(--text-muted); margin-bottom: 12px; }

.advising-stats { display: flex; flex-direction: column; gap: 12px; }
.stat-box {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 22px;
  text-align: center;
  min-width: 148px;
  background: var(--bg);
}
.stat-num {
  display: block;
  font-family: var(--font-serif);
  font-size: 1.8rem;
  font-weight: 600;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 4px;
}
.stat-label {
  display: block;
  font-size: 11px;
  color: var(--text-faint);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* =====================================================
   CV
   ===================================================== */
.cv-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 72px;
  align-items: start;
}
.cv-left p { font-size: 15px; color: var(--text-muted); margin-bottom: 24px; }
.cv-highlights { margin-bottom: 28px; }
.cv-hl-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 8px 0;
  font-size: 14px;
  color: var(--text-mid);
  border-bottom: 1px solid var(--border);
}
.cv-hl-item:last-child { border-bottom: none; }
.cv-hl-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent);
  flex-shrink: 0;
  margin-top: 8px;
}
.cv-note {
  font-size: 12px;
  color: var(--text-faint);
  margin-top: 14px;
  font-style: italic;
}
.cv-note code {
  font-family: monospace;
  background: var(--accent-pale);
  padding: 1px 5px;
  border-radius: 3px;
  font-style: normal;
  font-size: 11px;
}

.cv-timeline { padding-left: 20px; border-left: 2px solid var(--border-md); }
.tl-item {
  position: relative;
  padding: 0 0 28px 24px;
}
.tl-item::before {
  content: '';
  position: absolute;
  left: -7px; top: 5px;
  width: 12px; height: 12px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid var(--bg-tinted);
}
.tl-year {
  font-size: 11px;
  font-weight: 500;
  color: var(--accent);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  display: block;
  margin-bottom: 4px;
}
.tl-body h4 { font-size: 15px; margin-bottom: 4px; }
.tl-body p { font-size: 13px; color: var(--text-muted); }

/* =====================================================
   BLOG
   ===================================================== */
.blog-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.blog-card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px 22px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: var(--transition);
  background: var(--bg-tinted);
}
.blog-card:hover { border-color: var(--accent-lt); box-shadow: var(--shadow); transform: translateY(-2px); }
.blog-card-featured {
  grid-row: span 2;
  background: var(--bg);
  border-color: var(--border-md);
}
.blog-cat {
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
}
.blog-card h3 { font-size: 17px; line-height: 1.3; }
.blog-card p { font-size: 14px; color: var(--text-muted); flex: 1; }
.blog-date { font-size: 11px; color: var(--text-faint); margin-top: auto; }

/* =====================================================
   MEDIA
   ===================================================== */
.media-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.media-item {
  display: flex;
  gap: 18px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  align-items: flex-start;
  background: var(--bg);
  transition: var(--transition);
}
.media-item:hover { border-color: var(--accent-lt); box-shadow: var(--shadow); }
.media-item-placeholder { opacity: 0.5; border-style: dashed; }
.media-icon {
  flex-shrink: 0;
  width: 34px; height: 34px;
  background: var(--accent-pale);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  color: var(--accent);
}
.media-type {
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  display: block;
  margin-bottom: 5px;
}
.media-body h4 { margin-bottom: 5px; font-size: 15px; }
.media-body p { font-size: 13px; color: var(--text-muted); }

/* =====================================================
   CONTACT
   ===================================================== */
.contact-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 72px;
  align-items: start;
}
.contact-desc { color: #b09080; font-size: 15px; margin-bottom: 32px; }
.contact-details { display: flex; flex-direction: column; gap: 20px; }
.contact-item { display: flex; flex-direction: column; gap: 5px; }
.contact-label {
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-lt);
}
.contact-item span:last-child { font-size: 14px; color: #c8b0a0; line-height: 1.65; }
.contact-link { color: var(--accent-lt); border-bottom: 1px solid transparent; transition: var(--transition); }
.contact-link:hover { border-bottom-color: var(--accent-lt); }

.contact-form {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-lg);
  padding: 30px;
}
.form-group { margin-bottom: 16px; }
.form-group label {
  display: block;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #b09080;
  margin-bottom: 6px;
}
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.14);
  border-radius: 5px;
  padding: 10px 13px;
  font-size: 14px;
  font-family: var(--font-sans);
  color: #f0e4d4;
  outline: none;
  transition: var(--transition);
}
.form-group input::placeholder,
.form-group textarea::placeholder { color: rgba(240,228,212,0.3); }
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus { border-color: var(--accent-lt); }
.form-group select option { background: var(--bg-dark); color: #f0e4d4; }
.form-group textarea { resize: vertical; min-height: 100px; }

.btn-form {
  width: 100%;
  background: var(--accent);
  color: white;
  border: none;
  padding: 12px;
  border-radius: 5px;
  font-size: 14px;
  font-weight: 500;
  font-family: var(--font-sans);
  cursor: pointer;
  transition: var(--transition);
  letter-spacing: 0.02em;
}
.btn-form:hover { background: var(--accent-dk); transform: translateY(-1px); }
.form-feedback { font-size: 13px; margin-top: 12px; text-align: center; color: #a8d4a0; }

/* =====================================================
   FOOTER
   ===================================================== */
#site-footer {
  background: var(--bg-dark-mid);
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: 36px 0;
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
}
.footer-brand {
  font-family: var(--font-serif);
  font-size: 15px;
  color: #e0cfc4;
  font-weight: 600;
  margin-bottom: 4px;
}
.footer-brand em { color: var(--accent-lt); }
.footer-tagline { font-size: 12px; color: #7a5a48; margin-bottom: 6px; }
.footer-copy { font-size: 11px; color: #5a3e30; }
.footer-links { display: flex; gap: 20px; flex-wrap: wrap; }
.footer-link {
  font-size: 12px;
  color: #7a5a48;
  transition: var(--transition);
}
.footer-link:hover { color: var(--accent-lt); }

/* =====================================================
   RESPONSIVE
   ===================================================== */
@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; gap: 40px; }
  .hero-photo { display: flex; justify-content: center; order: -1; }
  .section-grid-2 { grid-template-columns: 1fr; gap: 40px; }
  .research-interests { grid-template-columns: repeat(2, 1fr); }
  .courses-grid { grid-template-columns: repeat(2, 1fr); }
  .cv-inner { grid-template-columns: 1fr; gap: 48px; }
  .advising-block { grid-template-columns: 1fr; }
  .advising-stats { flex-direction: row; justify-content: center; }
  .contact-inner { grid-template-columns: 1fr; gap: 48px; }
  .media-grid { grid-template-columns: 1fr; }
  .blog-grid { grid-template-columns: 1fr; }
  .blog-card-featured { grid-row: span 1; }
}

@media (max-width: 640px) {
  .container { padding: 0 20px; }
  .section { padding: 60px 0; }
  .hero { padding: 112px 0 60px; }
  .nav-links { display: none; flex-direction: column; position: absolute; top: 64px; left: 0; right: 0; background: var(--bg); border-bottom: 1px solid var(--border); padding: 12px; gap: 2px; }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 10px 16px; }
  .nav-toggle { display: flex; }
  .hero-actions { flex-direction: column; align-items: flex-start; }
  .research-interests { grid-template-columns: 1fr; }
  .courses-grid { grid-template-columns: 1fr; }
  .pub-entry { grid-template-columns: 1fr; gap: 4px; }
  .footer-inner { flex-direction: column; align-items: flex-start; }
}