/* ============================================================
   VARIABLES & RESET
   ============================================================ */
:root {
  /* Dark purple palette */
  --cream:        #0e0c14;        /* page background — deep dusk */
  --cream-dark:   #161323;        /* slightly lifted surface */
  --ink:          #ede8f8;        /* primary text — warm lavender-white */
  --ink-muted:    #a89dc4;        /* secondary text */
  --ink-light:    #6b6080;        /* tertiary / disabled */
  --amber:        #c4a8e8;        /* accent — soft muted purple */
  --amber-light:  #9f80cc;        /* accent darker / hover */
  --amber-pale:   rgba(196,168,232,0.10); /* subtle tinted bg */
  --rule:         rgba(196,168,232,0.10); /* dividers */

  /* Sidebar gets its own slightly lifted tone */
  --sidebar-bg:   #12101c;

  --font-display: 'Cormorant Garamond', Georgia, serif;
  --font-mono:    'IBM Plex Mono', 'Courier New', monospace;
  --font-body:    'Source Serif 4', Georgia, serif;

  --sidebar-w:    220px;
  --section-pad:  clamp(60px, 8vw, 100px);
}

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

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

body {
  background: var(--cream);
  background-image:
    radial-gradient(ellipse 80% 60% at 70% 10%, rgba(120,80,180,0.07) 0%, transparent 60%),
    radial-gradient(ellipse 50% 40% at 20% 80%, rgba(90,60,150,0.05) 0%, transparent 55%);
  color: var(--ink);
  font-family: var(--font-body);
  font-weight: 300;
  line-height: 1.75;
  overflow-x: hidden;
}

/* ============================================================
   GRAIN OVERLAY
   ============================================================ */
.grain {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9999;
  opacity: 0.055;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
  background-repeat: repeat;
  background-size: 160px 160px;
}

/* ============================================================
   UTILITY CLASSES
   ============================================================ */
.mono {
  font-family: var(--font-mono);
  letter-spacing: -0.02em;
}

a {
  color: inherit;
  text-decoration: none;
}

/* ============================================================
   SIDEBAR NAVIGATION
   ============================================================ */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--sidebar-w);
  height: 100vh;
  display: flex;
  flex-direction: column;
  padding: 40px 30px;
  border-right: 1px solid var(--rule);
  background: var(--sidebar-bg);
  z-index: 100;
}

.nav-logo {
  margin-bottom: 48px;
}

.nav-logo .mono {
  font-size: 0.72rem;
  color: var(--amber);
  font-weight: 400;
  letter-spacing: 0.02em;
}

.nav-links {
  list-style: none;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.nav-links li {
  opacity: 0;
  transform: translateX(-10px);
  animation: navFadeIn 0.5s ease forwards;
}

.nav-links li:nth-child(1) { animation-delay: 0.1s; }
.nav-links li:nth-child(2) { animation-delay: 0.18s; }
.nav-links li:nth-child(3) { animation-delay: 0.26s; }
.nav-links li:nth-child(4) { animation-delay: 0.34s; }
.nav-links li:nth-child(5) { animation-delay: 0.42s; }

@keyframes navFadeIn {
  to { opacity: 1; transform: translateX(0); }
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 10px;
  font-family: var(--font-body);
  font-size: 0.92rem;
  font-weight: 300;
  color: var(--ink-muted);
  border-radius: 4px;
  transition: color 0.2s, background 0.2s;
  position: relative;
}

.nav-link::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%) scaleY(0);
  width: 2px;
  height: 60%;
  background: var(--amber);
  border-radius: 2px;
  transition: transform 0.2s;
}

.nav-link:hover,
.nav-link.active {
  color: var(--ink);
}

.nav-link.active::before,
.nav-link:hover::before {
  transform: translateY(-50%) scaleY(1);
}

.nav-link.active {
  background: rgba(196,168,232,0.08);
}

.nav-index {
  font-size: 0.65rem;
  color: var(--amber);
  font-weight: 300;
  min-width: 20px;
  opacity: 0.7;
}

.nav-footer {
  padding-top: 20px;
  border-top: 1px solid var(--rule);
}

.social-links {
  display: flex;
  gap: 16px;
}

.social-link {
  font-size: 0.7rem;
  font-weight: 400;
  color: var(--ink-light);
  transition: color 0.2s;
  letter-spacing: 0.04em;
}

.social-link:hover {
  color: var(--amber);
}

/* ============================================================
   MAIN CONTENT
   ============================================================ */
.main-content {
  margin-left: var(--sidebar-w);
  min-height: 100vh;
}

/* ============================================================
   SECTIONS — BASE
   ============================================================ */
.section {
  padding: var(--section-pad) clamp(40px, 6vw, 80px);
  border-bottom: 1px solid var(--rule);
  /* min-height: 100vh removed — was forcing large empty gaps on short sections */
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.section-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 48px;
}

.section-tag {
  font-size: 0.65rem;
  color: var(--amber);
  font-weight: 400;
  letter-spacing: 0.08em;
  opacity: 0.8;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 300;
  letter-spacing: -0.01em;
  line-height: 1;
  color: var(--ink);
}

.section-title::after {
  content: '.';
  color: var(--amber);
}

/* ============================================================
   ABOUT SECTION
   ============================================================ */
.about-grid {
  display: grid;
  grid-template-columns: 1fr; /* was "1fr 280px" — second column freed up since the photo col is commented out */
  gap: clamp(40px, 6vw, 80px);
  align-items: start;
}

.display-name {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 8vw, 6.5rem);
  font-weight: 300;
  line-height: 0.95;
  letter-spacing: -0.03em;
  color: var(--ink);
  margin-bottom: 24px;
  opacity: 0;
  transform: translateY(20px);
  animation: fadeUp 0.8s ease 0.2s forwards;
}

.display-name em {
  font-style: italic;
  color: var(--amber);
}

@keyframes fadeUp {
  to { opacity: 1; transform: translateY(0); }
}

.about-role {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 28px;
  flex-wrap: wrap;
  opacity: 0;
  animation: fadeUp 0.8s ease 0.4s forwards;
}

.role-badge {
  font-size: 0.68rem;
  font-weight: 400;
  letter-spacing: 0.06em;
  color: var(--amber);
  border: 1px solid var(--amber);
  padding: 4px 10px;
  border-radius: 2px;
  background: var(--amber-pale);
}

.role-dept {
  font-size: 0.88rem;
  color: var(--ink-muted);
  font-family: var(--font-body);
  font-weight: 300;
}

.about-bio {
  font-size: 0.92rem;
  color: var(--ink-muted);
  line-height: 1.8;
  margin-bottom: 16px;
  max-width: 580px;
  opacity: 0;
  animation: fadeUp 0.8s ease 0.5s forwards;
}

.about-bio em {
  font-style: italic;
  color: var(--ink);
}

.about-list {
  font-size: 0.92rem;
  color: var(--ink-muted);
  line-height: 1.8;
  max-width: 580px;
  margin-bottom: 16px;
  list-style-position: inside; /* keeps bullets flush with the left margin instead of indented */
  padding-left: 0;
  margin-left: 0;
  opacity: 0;
  animation: fadeUp 0.8s ease 0.5s forwards;
}

.about-list li {
  margin-bottom: 4px;
}

.about-affil {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-top: 28px;
  font-size: 0.9rem;
  color: var(--ink-muted);
  opacity: 0;
  animation: fadeUp 0.8s ease 0.6s forwards;
}

.affil-label {
  font-size: 0.68rem;
  color: var(--amber);
  font-weight: 400;
  letter-spacing: 0.04em;
}

.inline-link {
  color: var(--amber);
  border-bottom: 1px solid var(--amber-light);
  transition: border-color 0.2s;
}

.inline-link:hover {
  border-color: var(--amber);
}

/* Photo Column */
/*
.about-photo-col {
  opacity: 0;
  animation: fadeUp 0.8s ease 0.35s forwards;
}

.photo-frame {
  margin-bottom: 24px;
}

.photo-placeholder {
  width: 100%;
  aspect-ratio: 4/5;
  background: var(--cream-dark);
  border: 1px solid var(--rule);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 10px;
  position: relative;
  overflow: hidden;
}

.photo-placeholder img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.photo-placeholder::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--amber), transparent);
}

.photo-initials {
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 300;
  color: var(--ink-light);
  letter-spacing: 0.1em;
  opacity: 0.5;
}

.photo-caption {
  font-size: 0.7rem;
  color: var(--ink-light);
  letter-spacing: 0.02em;
}
*/

/* Keyword Cloud */
.keyword-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.keyword {
  font-family: var(--font-body);
  font-size: 0.78rem;
  color: var(--ink-muted);
  font-weight: 300;
  padding: 4px 10px;
  background: var(--cream-dark);
  border: 1px solid var(--rule);
  border-radius: 20px;
  transition: background 0.2s, color 0.2s, border-color 0.2s;
}

.keyword.mono {
  font-family: var(--font-mono);
  font-size: 0.7rem;
}

.keyword:hover {
  background: var(--amber-pale);
  border-color: var(--amber-light);
  color: var(--ink);
}

/* ============================================================
   RESEARCH SECTION
   ============================================================ */
.section-intro {
  font-size: 1.05rem;
  color: var(--ink-muted);
  max-width: 580px;
  margin-bottom: 48px;
  line-height: 1.8;
}

.research-threads {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.thread {
  padding: 32px 0;
  border-bottom: 1px solid var(--rule);
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  position: relative;
  transition: background 0.2s;
}

.thread:first-child {
  border-top: 1px solid var(--rule);
}

.thread-header {
  display: flex;
  align-items: baseline;
  gap: 20px;
}

.thread-num {
  font-size: 0.7rem;
  color: var(--amber);
  font-weight: 400;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.thread-title {
  font-family: var(--font-display);
  font-size: clamp(1.2rem, 2.5vw, 1.6rem);
  font-weight: 400;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.thread-desc {
  font-size: 0.96rem;
  color: var(--ink-muted);
  line-height: 1.8;
  max-width: 620px;
  padding-left: calc(0.7rem + 20px + 20px);
}

.thread-methods {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding-left: calc(0.7rem + 20px + 20px);
}

.method-tag {
  font-size: 0.65rem;
  font-weight: 400;
  letter-spacing: 0.04em;
  color: var(--amber);
  border: 1px solid var(--amber-light);
  padding: 2px 8px;
  border-radius: 2px;
  background: var(--amber-pale);
}

/* ============================================================
   PUBLICATIONS
   ============================================================ */
.pub-filter {
  display: flex;
  gap: 4px;
  margin-bottom: 40px;
}

.filter-btn {
  font-size: 0.68rem;
  font-weight: 400;
  letter-spacing: 0.04em;
  color: var(--ink-light);
  background: none;
  border: 1px solid var(--rule);
  padding: 6px 14px;
  border-radius: 2px;
  cursor: pointer;
  transition: all 0.2s;
}

.filter-btn:hover {
  border-color: var(--amber-light);
  color: var(--ink-muted);
}

.filter-btn.active {
  background: var(--amber);
  border-color: var(--amber);
  color: #0e0c14;
}

.pub-list {
  display: flex;
  flex-direction: column;
}

.pub-item {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 24px;
  padding: 28px 0;
  border-bottom: 1px solid var(--rule);
  transition: opacity 0.3s;
}

.pub-item:first-of-type {
  border-top: 1px solid var(--rule);
}

.pub-item.hidden {
  display: none;
}

.pub-year {
  font-size: 0.7rem;
  color: var(--amber);
  font-weight: 400;
  padding-top: 4px;
  letter-spacing: 0.04em;
}

.pub-title {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 400;
  letter-spacing: -0.01em;
  color: var(--ink);
  margin-bottom: 6px;
  line-height: 1.4;
}

.pub-authors {
  font-size: 0.88rem;
  color: var(--ink-muted);
  font-weight: 300;
  margin-bottom: 4px;
}

.pub-venue {
  font-size: 0.7rem;
  color: var(--ink-light);
  margin-bottom: 12px;
  letter-spacing: 0.02em;
}

.pub-links {
  display: flex;
  gap: 12px;
}

.pub-link {
  font-size: 0.68rem;
  font-weight: 400;
  letter-spacing: 0.04em;
  color: var(--amber);
  border-bottom: 1px solid var(--amber-light);
  padding-bottom: 1px;
  transition: border-color 0.2s;
}

.pub-link:hover {
  border-color: var(--amber);
}

/* ============================================================
   CV SECTION
   ============================================================ */
.cv-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px 64px;
}

.cv-block-title {
  font-size: 0.68rem;
  font-weight: 400;
  letter-spacing: 0.1em;
  color: var(--amber);
  text-transform: uppercase;
  margin-bottom: 24px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--rule);
}

.cv-entry {
  display: grid;
  grid-template-columns: 68px 1fr;
  gap: 16px;
  margin-bottom: 20px;
  align-items: start;
}

.cv-year {
  font-size: 0.7rem;
  font-weight: 400;
  color: var(--ink-light);
  letter-spacing: 0.02em;
  padding-top: 3px;
}

.cv-entry-body {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.cv-entry-body strong {
  font-family: var(--font-body);
  font-weight: 400;
  font-size: 0.93rem;
  color: var(--ink);
}

.cv-inst {
  font-size: 0.85rem;
  color: var(--ink-muted);
  font-weight: 300;
}

.cv-note {
  font-size: 0.75rem;
  color: var(--ink-light);
  font-style: italic;
}

.cv-note.mono {
  font-style: normal;
  font-size: 0.7rem;
  color: var(--amber);
}

.cv-download {
  margin-top: 0;
  padding-top: 0;
  border-top: none;
}

.download-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 0.75rem;
  font-weight: 400;
  letter-spacing: 0.06em;
  color: var(--ink);
  border: 1px solid rgba(196,168,232,0.35);
  padding: 12px 24px;
  border-radius: 2px;
  transition: all 0.2s;
}

.download-btn:hover {
  background: rgba(196,168,232,0.12);
  border-color: var(--amber);
  color: var(--amber);
}

/* ============================================================
   CONTACT SECTION
   ============================================================ */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 360px;
  gap: 64px;
  align-items: start;
}

.contact-text > p {
  font-size: 1.05rem;
  color: var(--ink-muted);
  max-width: 480px;
  margin-bottom: 36px;
  line-height: 1.8;
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.contact-row {
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 16px;
  align-items: start;
  font-size: 0.92rem;
}

.contact-label {
  font-size: 0.65rem;
  font-weight: 400;
  letter-spacing: 0.08em;
  color: var(--amber);
  padding-top: 4px;
}

.contact-value {
  color: var(--ink-muted);
  line-height: 1.5;
}

a.contact-value {
  color: var(--ink);
  border-bottom: 1px solid var(--rule);
  transition: border-color 0.2s, color 0.2s;
}

a.contact-value:hover {
  color: var(--amber);
  border-color: var(--amber-light);
}

/* Terminal Block */
.terminal-block {
  background: #0a0810;
  border: 1px solid var(--rule);
  border-radius: 6px;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0,0,0,0.5), 0 0 0 1px rgba(196,168,232,0.06);
}

.terminal-header {
  background: rgba(196,168,232,0.05);
  padding: 12px 16px;
  display: flex;
  gap: 8px;
  align-items: center;
  border-bottom: 1px solid var(--rule);
}

.t-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(196,168,232,0.18);
}

.terminal-body {
  padding: 20px 20px 28px;
  font-size: 0.75rem;
  color: rgba(232,224,248,0.55);
  line-height: 1.8;
  min-height: 180px;
}

.terminal-body .t-prompt {
  color: var(--amber);
}

.terminal-body .t-output {
  color: rgba(232,224,248,0.4);
}

.terminal-body .t-highlight {
  color: #b8d8c8;
}

.t-cursor {
  display: inline-block;
  width: 7px;
  height: 1em;
  background: var(--amber);
  vertical-align: text-bottom;
  opacity: 0.7;
  animation: blink 1s step-end infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

/* ============================================================
   SCROLL ANIMATIONS
   ============================================================ */
.section > *:not(.section-header) {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.section.is-visible > *:not(.section-header) {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger children */
.section.is-visible > *:nth-child(2) { transition-delay: 0.05s; }
.section.is-visible > *:nth-child(3) { transition-delay: 0.12s; }
.section.is-visible > *:nth-child(4) { transition-delay: 0.2s; }
.section.is-visible > *:nth-child(5) { transition-delay: 0.28s; }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1024px) {
  :root { --sidebar-w: 180px; }
  .about-grid { grid-template-columns: 1fr; }
  .about-photo-col { order: -1; max-width: 240px; }
  .cv-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  :root { --sidebar-w: 0px; }

  .sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: auto;
    flex-direction: row;
    align-items: center;
    padding: 16px 20px;
    border-right: none;
    border-bottom: 1px solid var(--rule);
    background: rgba(14,12,20,0.95);
    backdrop-filter: blur(8px);
    z-index: 200;
  }

  .nav-logo { margin-bottom: 0; margin-right: auto; }
  .nav-footer { display: none; }

  .nav-links {
    flex-direction: row;
    gap: 2px;
  }

  .nav-link {
    padding: 6px 10px;
    font-size: 0.8rem;
  }

  .nav-link::before { display: none; }
  .nav-index { display: none; }

  .main-content {
    margin-left: 0;
    padding-top: 60px;
  }

  .section {
    padding: 60px 24px;
    min-height: auto;
  }

  .thread-desc,
  .thread-methods {
    padding-left: 0;
  }
}