:root {
  --bg: #f5f2ec;
  --surface: #ffffff;
  --ink: #1a1714;
  --ink-soft: #6b6460;
  --ink-faint: #b8b0a8;
  --accent: #c8502a;
  --accent-pale: #f5e8e3;
  --border: #e2ddd8;
  --mono: 'DM Mono', monospace;
  --serif: 'DM Serif Display', serif;
  --sans: 'DM Sans', sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--ink);
  font-size: 15px;
  line-height: 1.7;
  min-height: 100vh;
}

a { color: inherit; }

.hero {
  background: var(--ink);
  color: #f5f2ec;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 60% at 70% 50%, #3a2e1e 0%, transparent 70%);
  pointer-events: none;
}

.hero-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 64px 40px 56px;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 48px;
  align-items: center;
  position: relative;
}

.hero-avatar {
  width: 130px;
  height: 130px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--accent);
  flex-shrink: 0;
}

.hero-label {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: none;
  color: var(--accent);
  margin-bottom: 10px;
}

.hero-name {
  font-family: var(--serif);
  font-size: clamp(2rem, 5vw, 3.2rem);
  line-height: 1.1;
  color: #f5f2ec;
  margin-bottom: 12px;
}

.hero-tagline {
  font-size: 14px;
  color: #b8aa9e;
  font-weight: 300;
  margin-bottom: 24px;
  max-width: 640px;
}

.hero-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.hero-link {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: none;
  color: #f5f2ec;
  text-decoration: none;
  border: 1px solid rgba(245, 242, 236, 0.2);
  padding: 6px 14px;
  border-radius: 2px;
  transition: background 0.2s, border-color 0.2s, color 0.2s;
}

.hero-link:hover,
.hero-link.current {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

nav {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 40px;
  display: flex;
  gap: 0;
  overflow-x: auto;
  scrollbar-width: none;
}

.nav-inner::-webkit-scrollbar { display: none; }

.nav-link {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: none;
  color: var(--ink-soft);
  text-decoration: none;
  padding: 16px 18px;
  border-bottom: 2px solid transparent;
  white-space: nowrap;
  transition: color 0.2s, border-color 0.2s;
}

.nav-link:hover,
.nav-link.current {
  color: var(--ink);
  border-bottom-color: var(--accent);
}

main {
  max-width: 1100px;
  margin: 0 auto;
  padding: 56px 40px 80px;
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 56px;
  align-items: start;
}

main.single-column {
  grid-template-columns: 1fr;
}

section { margin-bottom: 52px; }

.section-label {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: none;
  color: var(--accent);
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.section-label::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}

.about-text {
  color: var(--ink-soft);
  font-weight: 300;
  max-width: 760px;
  font-size: 15px;
}

.about-text p + p { margin-top: 14px; }

.project-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 4px;
  overflow: hidden;
  transition: box-shadow 0.25s, transform 0.25s;
}

.project-card:hover {
  box-shadow: 0 12px 40px rgba(26, 23, 20, 0.1);
  transform: translateY(-2px);
}

.project-img {
  width: 100%;
  object-fit: cover;
  display: block;
  border-bottom: 1px solid var(--border);
}

.project-img2 {
  width: 100%;
  object-fit: cover;
  display: block;
  border-bottom: 1px solid var(--border);
}

.project-body { padding: 24px; }

.project-tag {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: none;
  color: var(--accent);
  background: var(--accent-pale);
  padding: 3px 8px;
  border-radius: 2px;
  display: inline-block;
  margin-bottom: 10px;
}

.project-title {
  font-family: var(--serif);
  font-size: 1.4rem;
  color: var(--ink);
  margin-bottom: 10px;
  font-weight: 400;
}

.project-desc,
.card-text {
  font-size: 13.5px;
  color: var(--ink-soft);
  font-weight: 300;
  line-height: 1.7;
  margin-bottom: 18px;
}

.project-link,
.text-link {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: none;
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--ink);
  padding-bottom: 1px;
  transition: color 0.2s, border-color 0.2s;
}

.project-link:hover,
.text-link:hover {
  color: var(--accent);
  border-color: var(--accent);
}

.pub-tabs {
  display: flex;
  gap: 0;
  border-bottom: 1px solid var(--border);
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.pub-tab {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: none;
  color: var(--ink-soft);
  background: none;
  border: none;
  padding: 10px 20px;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  transition: color 0.2s, border-color 0.2s;
}

.pub-tab.active {
  color: var(--ink);
  border-bottom-color: var(--accent);
}

.pub-list { display: none; }
.pub-list.active { display: block; }

.pub-item {
  padding: 16px 0;
  border-bottom: 1px solid var(--border);
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 12px;
  align-items: start;
}

.pub-year {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-faint);
  padding-top: 2px;
}

.pub-title {
  font-size: 14px;
  font-weight: 500;
  color: var(--ink);
  line-height: 1.45;
  margin-bottom: 4px;
}

.pub-authors {
  font-size: 12.5px;
  color: var(--ink);
  font-weight: 400;
  line-height: 1.5;
  margin-bottom: 4px;
}

.pub-venue {
  font-size: 12.5px;
  color: var(--ink-soft);
  font-weight: 300;
}

.pub-badge {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.1em;
  text-transform: none;
  padding: 2px 7px;
  border-radius: 2px;
  margin-left: 8px;
  vertical-align: middle;
}

.show-more-btn {
  display: block;
  margin: 20px auto 0;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: none;
  background: none;
  border: 1px solid var(--border);
  color: var(--ink-soft);
  padding: 10px 24px;
  cursor: pointer;
  border-radius: 2px;
  transition: background 0.2s, color 0.2s, border-color 0.2s;
}

.show-more-btn:hover {
  background: var(--ink);
  color: #fff;
  border-color: var(--ink);
}

.sidebar > * + * { margin-top: 36px; }

.info-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 24px 28px;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.05);
  margin-bottom: 24px;
}

.info-card-title {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: none;
  color: var(--accent);
  margin-bottom: 16px;
}

.info-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px;
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
}

.info-row:last-child,
.edu-item:last-child,
.awards-list li:last-child,
.cert-list li:last-child { border-bottom: none; }

.info-row:first-of-type { padding-top: 0; }

.info-key {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: none;
  color: var(--ink-faint);
  /* Ensure keys take up consistent width within a row */
  flex-basis: 30%;
}

.info-val {
  font-size: 13.5px;
  color: var(--ink);
  font-weight: 400;
  line-height: 1.5;
  /* Allow values to occupy the remaining space */
  flex-basis: 70%;
}

.edu-item {
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
}

.edu-period {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-faint);
  margin-bottom: 3px;
}

.edu-degree { font-size: 13.5px; color: var(--ink); font-weight: 500; }
.edu-school { font-size: 12.5px; color: var(--ink-soft); font-weight: 300; }

.awards-list, .cert-list { list-style: none; }

.awards-list li {
  font-size: 13px;
  color: var(--ink-soft);
  font-weight: 300;
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
  line-height: 1.5;
  display: flex;
  gap: 10px;
  align-items: flex-start;
}

.awards-list li::before {
  content: '✦';
  color: var(--accent);
  font-size: 8px;
  margin-top: 5px;
  flex-shrink: 0;
}

.cert-list li {
  font-size: 13px;
  color: var(--ink-soft);
  font-weight: 300;
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 10px;
}

.cert-list li::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  flex-shrink: 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: 4px;
  overflow: hidden;
}

.stat-cell {
  background: var(--surface);
  padding: 18px 16px;
  text-align: center;
}

.stat-num {
  font-family: var(--serif);
  font-size: 2rem;
  color: var(--ink);
  line-height: 1;
  display: block;
  margin-bottom: 4px;
}

.stat-label {
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: 0.12em;
  text-transform: none;
  color: var(--ink-faint);
}

.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tag {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: none;
  color: var(--ink);
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 6px 14px;
  border-radius: 2px;
  transition: background 0.2s, color 0.2s, border-color 0.2s;
}

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

.card-grid {
  display: grid;
  gap: 24px;
}

.simple-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 24px;
}

.simple-card h2,
.simple-card h3 {
  font-family: var(--serif);
  font-weight: 400;
  margin-bottom: 10px;
}

footer {
  background: var(--ink);
  color: #786e68;
  text-align: center;
  padding: 28px 40px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(18px); }
  to { opacity: 1; transform: translateY(0); }
}

.hero-inner > * { animation: fadeUp 0.6s ease both; }
.hero-inner > *:nth-child(1) { animation-delay: 0.05s; }
.hero-inner > *:nth-child(2) { animation-delay: 0.15s; }

@media (max-width: 860px) {
  main { grid-template-columns: 1fr; }
  .sidebar { order: -1; }
  .stats-grid { grid-template-columns: repeat(4, 1fr); }
  .hero-inner { grid-template-columns: 1fr; text-align: center; }
  .hero-avatar { margin: 0 auto; }
  .hero-links { justify-content: center; }
}

@media (max-width: 600px) {
  .hero-inner { padding: 40px 24px 36px; }
  main { padding: 36px 20px 60px; }
  .nav-inner { padding: 0 16px; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .pub-item { grid-template-columns: 1fr; gap: 6px; }
  .pub-year { padding-top: 0; }
}

.pub-note {
  font-size: 12px;
  color: var(--accent);
  font-weight: 500;
  line-height: 1.5;
  margin-top: 4px;
}

.award-badge {
  background: #8f6a2a;
}

.acceptance-rate-badge {
  background: #3a6ea8;
}

.pub-stats-bar {
  display: flex;
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: 4px;
  overflow: hidden;
  margin-bottom: 32px;
}

.pub-stat {
  flex: 1;
  background: var(--surface);
  padding: 16px 12px;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.pub-stat-num {
  font-family: var(--serif);
  font-size: 1.8rem;
  color: var(--ink);
  line-height: 1;
}

.pub-stat-label {
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.1em;
  color: var(--ink-faint);
}

.pub-tab-count {
  display: inline-block;
  background: var(--accent-pale);
  color: var(--accent);
  font-family: var(--mono);
  font-size: 9px;
  padding: 1px 5px;
  border-radius: 2px;
  margin-left: 5px;
  vertical-align: middle;
}

.pub-tab.active .pub-tab-count {
  background: var(--accent);
  color: #fff;
}

@media (max-width: 600px) {
  .pub-stats-bar { flex-wrap: wrap; }
  .pub-stat { flex: 1 1 calc(50% - 1px); }
}

.edu-detail {
  margin-top: 0.35rem;
  color: #555;
  font-size: 0.98rem;
  line-height: 1.7;
}

.cv-download-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-top: 28px;
  padding: 14px 36px;
  background: var(--accent);
  color: #fff;
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-decoration: none;
  border-radius: 2px;
  transition: background 0.2s, transform 0.15s, box-shadow 0.2s;
  box-shadow: 0 4px 16px rgba(200, 80, 42, 0.3);
}

.cv-download-btn:hover {
  background: #a83e1f;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(200, 80, 42, 0.4);
}

/* ── Education Timeline ── */
.edu-timeline {
  position: relative;
  padding-left: 2rem;
}

.edu-timeline::before {
  content: '';
  position: absolute;
  left: 7px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: var(--border);
}

.edu-tl-item {
  position: relative;
  margin-bottom: 2rem;
}

.edu-tl-item:last-child {
  margin-bottom: 0;
}

.edu-tl-dot {
  position: absolute;
  left: -2rem;
  top: 6px;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  background: var(--accent);
  border: 3px solid var(--bg);
  box-sizing: border-box;
}

.edu-tl-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 24px 28px;
  transition: box-shadow 0.25s, transform 0.25s;
}

.edu-tl-card:hover {
  box-shadow: 0 8px 32px rgba(26, 23, 20, 0.08);
  transform: translateY(-2px);
}

.edu-tl-period {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--ink-faint);
  margin-bottom: 6px;
}

.edu-tl-degree {
  font-family: var(--serif);
  font-size: 1.3rem;
  font-weight: 400;
  color: var(--ink);
  margin-bottom: 4px;
  line-height: 1.3;
}

.edu-tl-school {
  font-size: 13px;
  color: var(--accent);
  font-weight: 400;
  margin-bottom: 0;
}

.edu-tl-divider {
  height: 1px;
  background: var(--border);
  margin: 16px 0;
}

.edu-tl-meta {
  display: grid;
  gap: 8px;
}

.edu-tl-row {
  display: grid;
  grid-template-columns: 90px 1fr;
  gap: 12px;
  align-items: start;
}

.edu-tl-key {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  color: var(--ink-faint);
  padding-top: 2px;
}

.edu-tl-val {
  font-size: 13px;
  color: var(--ink);
  line-height: 1.6;
  font-weight: 400;
}

.edu-tl-thesis {
  font-size: 13px;
  color: var(--ink-soft);
  line-height: 1.6;
  font-style: italic;
  font-weight: 300;
}

@media (max-width: 600px) {
  .edu-timeline { padding-left: 1.5rem; }
  .edu-tl-dot { left: -1.5rem; }
  .edu-tl-row { grid-template-columns: 1fr; gap: 2px; }
  .edu-tl-card { padding: 18px 20px; }
}

.contact-page {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.contact-card,
.contact-note-card {
  background: #ffffff;
  border: 1px solid rgba(20, 20, 20, 0.08);
  border-radius: 22px;
  padding: 28px 30px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.04);
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}

.contact-card-label {
  display: inline-block;
  margin-bottom: 10px;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: none;
  color: #6b7280;
}

.contact-card-title {
  margin: 0 0 10px;
  font-size: 1.5rem;
  line-height: 1.2;
}

.contact-card-text {
  margin: 0 0 18px;
  color: #4b5563;
  line-height: 1.75;
}

.contact-method {
  margin-bottom: 18px;
}

.contact-email {
  display: inline-block;
  font-family: "DM Mono", monospace;
  font-size: 0.98rem;
  padding: 10px 14px;
  border-radius: 12px;
  background: #f6f7f9;
  border: 1px solid rgba(20, 20, 20, 0.06);
  word-break: break-word;
}

.contact-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.contact-action-btn {
  appearance: none;
  border: 1px solid rgba(20, 20, 20, 0.12);
  background: #111111;
  color: #ffffff;
  border-radius: 999px;
  padding: 10px 16px;
  font: inherit;
  cursor: pointer;
  transition: transform 0.18s ease, opacity 0.18s ease, box-shadow 0.18s ease;
  box-shadow: 0 8px 18px rgba(0, 0, 0, 0.12);
}

.contact-action-btn:hover {
  transform: translateY(-1px);
  opacity: 0.94;
}

.copy-status {
  min-height: 1em;
  color: #6b7280;
  font-size: 0.95rem;
}

.contact-link-card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  text-decoration: none;
  color: inherit;
  padding: 16px 18px;
  border-radius: 16px;
  border: 1px solid rgba(20, 20, 20, 0.08);
  background: #f9fafb;
  transition: transform 0.18s ease, border-color 0.18s ease, background 0.18s ease;
}

.contact-link-card:hover {
  transform: translateY(-2px);
  border-color: rgba(20, 20, 20, 0.18);
  background: #f3f4f6;
}

.contact-link-label {
  font-size: 0.82rem;
  text-transform: none;
  letter-spacing: 0.08em;
  color: #6b7280;
}

.contact-link-value {
  font-size: 1rem;
  line-height: 1.6;
  word-break: break-word;
}

@media (max-width: 760px) {
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .contact-intro-card,
  .contact-card,
  .contact-note-card {
    padding: 22px 20px;
    border-radius: 18px;
  }

  .contact-title {
    font-size: 1.5rem;
  }
}

.contact-note {
  margin-top: 8px;
}

.contact-note-text {
  margin: 0;
  color: #4b5563;
  line-height: 1.8;
  max-width: 760px;
}