/* ============================================
   MAIN PORTFOLIO — Dark Academic / Editorial
   ============================================ */

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

:root {
  --ink: #0a0a10;
  --ink-2: #12121c;
  --paper: #f0ece6;
  --cream: #e8e2d9;
  --accent: #c8974a;
  --accent-light: #e8b870;
  --accent-2: #4a8cb4;
  --muted: #6a6560;
  --border: rgba(200,151,74,0.15);
  --border-2: rgba(255,255,255,0.06);
  --sidebar-w: 240px;
  --radius: 2px;
}

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

body {
  font-family: 'DM Mono', monospace;
  background: var(--ink);
  color: var(--paper);
  min-height: 100vh;
  overflow-x: hidden;
}

/* ---- Grain ---- */
.grain {
  position: fixed; inset: 0; z-index: 200; pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.04'/%3E%3C/svg%3E");
  opacity: 0.35;
}

/* ============ SIDEBAR ============ */
.sidebar {
  position: fixed;
  left: 0; top: 0; bottom: 0;
  width: var(--sidebar-w);
  background: var(--ink-2);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  padding: 2rem 0;
  z-index: 100;
  transition: transform 0.35s ease;
}

.sidebar-logo {
  display: flex; align-items: center; gap: 0.75rem;
  padding: 0 1.5rem 2rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 1.5rem;
}

.back-home {
  width: 32px; height: 32px;
  border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  color: var(--muted);
  text-decoration: none;
  transition: all 0.2s;
  flex-shrink: 0;
}

.back-home svg { width: 14px; height: 14px; }
.back-home:hover { border-color: var(--accent); color: var(--accent); }

.logo-text { display: flex; flex-direction: column; gap: 0.1rem; }
.logo-name {
  font-family: 'Syne', sans-serif;
  font-size: 0.85rem; font-weight: 700;
  color: var(--paper);
}
.logo-role {
  font-size: 0.6rem; letter-spacing: 0.15em;
  text-transform: uppercase; color: var(--muted);
}

/* Nav links */
.nav-links {
  list-style: none;
  flex: 1;
  overflow-y: auto;
  padding: 0 1rem;
}

.nav-links li { margin-bottom: 0.1rem; }

.nav-link {
  display: flex; align-items: center; gap: 0.75rem;
  padding: 0.6rem 0.75rem;
  color: var(--muted);
  text-decoration: none;
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  border-left: 2px solid transparent;
  transition: all 0.2s;
}

.nav-num {
  font-family: 'DM Mono', monospace;
  font-size: 0.6rem;
  color: rgba(200,151,74,0.4);
  flex-shrink: 0;
}

.nav-link:hover { color: var(--paper); border-left-color: rgba(200,151,74,0.3); }
.nav-link.active { color: var(--accent); border-left-color: var(--accent); }
.nav-link.active .nav-num { color: var(--accent); }

/* Social */
.sidebar-social {
  display: flex; justify-content: center; gap: 0.75rem;
  padding: 1.5rem 1.5rem 0;
  border-top: 1px solid var(--border);
  margin-top: 1rem;
}

.soc-link {
  width: 34px; height: 34px;
  border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  color: var(--muted); text-decoration: none;
  transition: all 0.2s;
}
.soc-link img, .soc-link svg { width: 16px; height: 16px; filter: invert(1) brightness(0.5); transition: filter 0.2s; }
.soc-link:hover { border-color: var(--accent); }
.soc-link:hover img, .soc-link:hover svg { filter: invert(1) brightness(0.8) sepia(1) saturate(3) hue-rotate(5deg); }

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

.mobile-topbar { display: none; }

/* Sections */
.section {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  border-bottom: 1px solid var(--border);
  scroll-margin-top: 0;
}

.section-inner {
  padding: 4rem 4rem 4rem 3.5rem;
  max-width: 1100px;
  flex: 1;
}

.section-label {
  font-size: 0.65rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1rem;
  opacity: 0.8;
}

.section-title {
  font-family: 'Cormorant Garamond', serif;
  font-size: clamp(2.5rem, 4vw, 3.8rem);
  font-weight: 300;
  line-height: 1;
  margin-bottom: 2.5rem;
  color: var(--paper);
}

.section-title em {
  font-style: italic;
  color: var(--accent-light);
}

/* ===== OVERVIEW SECTION ===== */
.overview-grid {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: 3rem;
  align-items: start;
}

.overview-text {
  font-family: 'Cormorant Garamond', serif;
  font-size: 1.1rem;
  line-height: 1.75;
  color: rgba(240,236,230,0.7);
  margin-bottom: 1.5rem;
}

.overview-pills {
  display: flex; flex-wrap: wrap; gap: 0.5rem;
  margin-bottom: 2rem;
}

.pill {
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.3rem 0.8rem;
  border: 1px solid var(--border);
  color: var(--muted);
}

/* External links */
.overview-links { display: flex; flex-direction: column; gap: 0.75rem; margin-bottom: 2rem; }

.ext-link {
  display: flex; align-items: center; gap: 1rem;
  padding: 1rem 1.25rem;
  border: 1px solid var(--border);
  text-decoration: none;
  transition: all 0.25s;
  background: rgba(255,255,255,0.02);
}

.ext-link:hover {
  border-color: var(--accent);
  background: rgba(200,151,74,0.04);
  transform: translateX(4px);
}

.ext-icon {
  width: 36px; height: 36px;
  border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}

.ext-icon img { width: 18px; height: 18px; filter: invert(1) brightness(0.7); }

.ext-info { flex: 1; }
.ext-label { display: block; font-family: 'Syne', sans-serif; font-size: 0.8rem; font-weight: 600; color: var(--paper); }
.ext-sub { font-size: 0.65rem; color: var(--muted); letter-spacing: 0.05em; }

.ext-arrow { width: 16px; height: 16px; color: var(--muted); flex-shrink: 0; transition: all 0.2s; }
.ext-link:hover .ext-arrow { color: var(--accent); transform: translate(2px, -2px); }

/* Collab box */
.collab-box {
  display: flex; gap: 0.75rem;
  padding: 1rem 1.25rem;
  border-left: 2px solid var(--accent);
  background: rgba(200,151,74,0.05);
  font-size: 0.78rem;
  line-height: 1.6;
  color: rgba(240,236,230,0.7);
}

.collab-pin { font-size: 1rem; flex-shrink: 0; }

/* ===== 3D MODEL WIDGET ===== */
.model-widget {
  background: var(--ink-2);
  border: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  position: sticky;
  top: 2rem;
}

.model-header {
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--border);
  display: flex; justify-content: space-between; align-items: center;
}

.model-title {
  font-family: 'Syne', sans-serif;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
}

.model-hint {
  font-size: 0.6rem;
  color: var(--muted);
  letter-spacing: 0.05em;
}

.model-container {
  height: 280px;
  cursor: grab;
  position: relative;
  overflow: hidden;
}

.model-container:active { cursor: grabbing; }

.model-footer {
  padding: 0.75rem 1rem;
  border-top: 1px solid var(--border);
  display: flex; gap: 0.5rem;
}

.model-btn {
  flex: 1;
  padding: 0.4rem 0;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--muted);
  font-family: 'DM Mono', monospace;
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  cursor: pointer;
  transition: all 0.2s;
}

.model-btn:hover, .model-btn.active {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(200,151,74,0.06);
}

/* ===== BIOGRAPHY ===== */
.bio-grid {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 3rem;
}

.bio-text { display: flex; flex-direction: column; gap: 1.2rem; }
.bio-text p {
  font-family: 'Cormorant Garamond', serif;
  font-size: 1.05rem;
  line-height: 1.8;
  color: rgba(240,236,230,0.7);
}

.education-timeline { }
.timeline-title {
  font-family: 'Syne', sans-serif;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.5rem;
}

.timeline { position: relative; padding-left: 1.5rem; }
.timeline::before {
  content: '';
  position: absolute; left: 0; top: 0; bottom: 0;
  width: 1px; background: var(--border);
}

.tl-item {
  position: relative;
  padding: 0 0 1.5rem 1rem;
  display: flex; gap: 0.75rem;
}

.tl-dot {
  position: absolute; left: -6px; top: 4px;
  width: 10px; height: 10px; border-radius: 50%;
  background: var(--accent); border: 2px solid var(--ink);
  flex-shrink: 0;
}

.tl-content { display: flex; flex-direction: column; gap: 0.25rem; }
.tl-degree { font-family: 'Syne', sans-serif; font-size: 0.8rem; font-weight: 600; color: var(--paper); }
.tl-note { font-size: 0.65rem; color: var(--accent); letter-spacing: 0.1em; text-transform: uppercase; }

.cv-btn {
  display: inline-flex; align-items: center; gap: 0.6rem;
  margin-top: 1.5rem;
  padding: 0.7rem 1.25rem;
  border: 1px solid var(--accent);
  color: var(--accent);
  text-decoration: none;
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  transition: all 0.2s;
}
.cv-btn svg { width: 16px; height: 16px; }
.cv-btn:hover { background: var(--accent); color: var(--ink); }

/* ===== NEWS ===== */
.news-feed { display: flex; flex-direction: column; gap: 1rem; max-width: 750px; }

.news-item {
  padding: 1.25rem 1.5rem;
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.02);
  display: grid;
  grid-template-columns: auto auto 1fr auto;
  align-items: start;
  gap: 1rem;
  transition: border-color 0.2s;
}

.news-item.featured { border-color: rgba(200,151,74,0.4); background: rgba(200,151,74,0.04); }
.news-item:hover { border-color: rgba(200,151,74,0.3); }

.news-tag {
  font-size: 0.6rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  padding: 0.2rem 0.6rem;
  border: 1px solid var(--border);
  color: var(--accent);
  height: fit-content;
  white-space: nowrap;
}

.news-date {
  font-size: 0.65rem;
  color: var(--muted);
  padding-top: 0.15rem;
  white-space: nowrap;
}

.news-text {
  font-family: 'Cormorant Garamond', serif;
  font-size: 0.98rem;
  line-height: 1.6;
  color: rgba(240,236,230,0.75);
}

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

.news-link {
  font-size: 0.65rem;
  color: var(--accent);
  text-decoration: none;
  white-space: nowrap;
  padding-top: 0.15rem;
  transition: opacity 0.2s;
}
.news-link:hover { opacity: 0.7; }

/* ===== PROJECTS ===== */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
}

.project-card {
  padding: 1.75rem;
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.02);
  transition: all 0.25s;
  position: relative;
  overflow: hidden;
}

.project-card::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), transparent);
  transform: scaleX(0); transform-origin: left;
  transition: transform 0.3s ease;
}

.project-card:hover { border-color: rgba(200,151,74,0.3); background: rgba(200,151,74,0.04); }
.project-card:hover::before { transform: scaleX(1); }

.project-num {
  font-family: 'Cormorant Garamond', serif;
  font-size: 3rem;
  font-weight: 300;
  color: rgba(200,151,74,0.15);
  line-height: 1;
  margin-bottom: 0.5rem;
}

.project-title {
  font-family: 'Syne', sans-serif;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--paper);
  margin-bottom: 0.75rem;
}

.project-desc {
  font-family: 'Cormorant Garamond', serif;
  font-size: 0.95rem;
  line-height: 1.65;
  color: rgba(240,236,230,0.6);
  margin-bottom: 1rem;
}

.project-tags { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.project-tags span {
  font-size: 0.6rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.2rem 0.6rem;
  border: 1px solid var(--border);
  color: var(--muted);
}

/* ===== PUBLICATIONS ===== */
.pub-list { display: flex; flex-direction: column; gap: 0; max-width: 800px; }

.pub-item {
  display: grid;
  grid-template-columns: 60px 1fr;
  gap: 1.5rem;
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--border);
  align-items: start;
}

.pub-year {
  font-family: 'DM Mono', monospace;
  font-size: 0.7rem;
  color: var(--accent);
  padding-top: 0.15rem;
}

.pub-title {
  font-family: 'Syne', sans-serif;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--paper);
  margin-bottom: 0.35rem;
}

.pub-venue {
  font-size: 0.75rem;
  color: var(--muted);
  margin-bottom: 0.6rem;
}

.pub-links { display: flex; gap: 0.75rem; }
.pub-links a {
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid rgba(200,151,74,0.3);
  transition: border-color 0.2s;
}
.pub-links a:hover { border-color: var(--accent); }

.pub-cta { padding: 1.5rem 0 0; }

.scholar-btn {
  display: inline-flex; align-items: center; gap: 0.75rem;
  padding: 0.85rem 1.5rem;
  border: 1px solid var(--accent);
  color: var(--accent);
  text-decoration: none;
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  transition: all 0.2s;
}
.scholar-btn img { width: 18px; height: 18px; filter: invert(1) brightness(0.7) sepia(1) saturate(5) hue-rotate(5deg); }
.scholar-btn svg { width: 16px; height: 16px; }
.scholar-btn:hover { background: var(--accent); color: var(--ink); }
.scholar-btn:hover img { filter: invert(1) brightness(0.1); }

/* ===== BOOKS ===== */
.books-grid { display: flex; flex-direction: column; gap: 1.25rem; max-width: 700px; }

.book-card {
  display: flex; gap: 1.5rem;
  padding: 1.5rem;
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.02);
  transition: all 0.25s;
}

.book-card:hover { border-color: rgba(200,151,74,0.3); }

.book-spine {
  width: 8px;
  background: linear-gradient(180deg, var(--accent), #7a5a20);
  border-radius: 1px;
  flex-shrink: 0;
}

.book-title {
  font-family: 'Syne', sans-serif;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--paper);
  margin-bottom: 0.5rem;
}

.book-desc {
  font-family: 'Cormorant Garamond', serif;
  font-size: 0.95rem;
  line-height: 1.65;
  color: rgba(240,236,230,0.6);
  margin-bottom: 0.75rem;
}

.book-role {
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  border: 1px solid rgba(200,151,74,0.3);
  padding: 0.2rem 0.6rem;
}

/* ===== TALKS ===== */
.talks-list { display: flex; flex-direction: column; gap: 0; max-width: 750px; }

.talk-item {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 1.5rem;
  padding: 1.25rem 0;
  border-bottom: 1px solid var(--border);
  align-items: start;
}

.talk-meta { display: flex; flex-direction: column; gap: 0.3rem; }
.talk-year { font-family: 'DM Mono', monospace; font-size: 0.72rem; color: var(--accent); }
.talk-venue { font-size: 0.7rem; color: var(--muted); }
.talk-title { font-family: 'Syne', sans-serif; font-size: 0.85rem; font-weight: 600; color: var(--paper); margin-bottom: 0.3rem; }
.talk-type { font-size: 0.65rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--muted); }

/* ===== SERVICE ===== */
.service-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 3rem; max-width: 900px; }
.service-cat {
  font-family: 'Syne', sans-serif;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1rem;
}
.service-list { list-style: none; display: flex; flex-direction: column; gap: 0.5rem; }
.service-list li {
  font-size: 0.8rem;
  line-height: 1.5;
  color: rgba(240,236,230,0.7);
  padding-left: 1rem;
  position: relative;
}
.service-list li::before {
  content: '·';
  position: absolute; left: 0;
  color: var(--accent);
}

/* ===== TEACHING ===== */
.teaching-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.25rem; max-width: 950px; }

.teach-card {
  padding: 1.75rem;
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.02);
  transition: border-color 0.2s;
}

.teach-card:hover { border-color: rgba(200,151,74,0.3); }

.teach-icon { font-size: 1.5rem; margin-bottom: 0.75rem; }

.teach-card h3 {
  font-family: 'Syne', sans-serif;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--paper);
  margin-bottom: 0.75rem;
}

.teach-card p, .teach-card ul {
  font-size: 0.78rem;
  line-height: 1.65;
  color: rgba(240,236,230,0.65);
}

.teach-card ul { list-style: none; display: flex; flex-direction: column; gap: 0.3rem; padding-left: 0; }
.teach-card ul li::before { content: '→ '; color: var(--accent); }

.contact-link {
  display: block;
  margin-top: 0.75rem;
  color: var(--accent);
  text-decoration: none;
  font-size: 0.72rem;
  border-bottom: 1px solid rgba(200,151,74,0.3);
  width: fit-content;
}

/* ===== FOOTER ===== */
.site-footer {
  padding: 2rem 4rem 3rem 3.5rem;
  display: flex; justify-content: space-between; align-items: center;
  border-top: 1px solid var(--border);
  background: rgba(0,0,0,0.2);
}
.site-footer p { font-size: 0.7rem; color: var(--muted); }
.footer-back { font-size: 0.7rem; color: var(--accent); text-decoration: none; transition: opacity 0.2s; }
.footer-back:hover { opacity: 0.7; }

/* ===== HAMBURGER ===== */
.hamburger {
  display: none;
  flex-direction: column; gap: 5px;
  background: none; border: none; cursor: pointer; padding: 4px;
}
.hamburger span {
  width: 22px; height: 1.5px; background: var(--paper);
  transition: all 0.3s;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1100px) {
  .overview-grid { grid-template-columns: 1fr; }
  .model-widget { position: static; }
}

@media (max-width: 900px) {
  .sidebar {
    transform: translateX(-100%);
  }
  .sidebar.open { transform: translateX(0); }

  .hamburger { display: flex; }

  .mobile-topbar {
    display: flex; align-items: center; gap: 1rem;
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--border);
    position: sticky; top: 0; z-index: 50;
    background: var(--ink);
  }
  .mobile-name { font-family: 'Syne', sans-serif; font-size: 0.85rem; font-weight: 700; }

  .main-content { margin-left: 0; }
  .section-inner { padding: 2.5rem 1.5rem; }
  .bio-grid { grid-template-columns: 1fr; }
  .projects-grid { grid-template-columns: 1fr; }
  .service-grid { grid-template-columns: 1fr; }
  .teaching-grid { grid-template-columns: 1fr; }
  .news-item { grid-template-columns: auto 1fr; grid-template-rows: auto auto; }
  .news-date { display: none; }
  .site-footer { flex-direction: column; gap: 0.75rem; text-align: center; }
}