h1, h2, h3 {
  margin: 0;
  letter-spacing: -0.03em;
  line-height: 1.2;
}

h1 {
  font-size: clamp(2rem, 3vw, 3rem);
  margin-bottom: 12px;
}

h2 {
  font-size: 1.14rem;
  margin-bottom: 14px;
}

h3 {
  font-size: 1.04rem;
}

p + p {
  margin-top: 10px;
}

.eyebrow {
  margin-bottom: 8px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.78rem;
  font-weight: 600;
}

.lede,
.hero-text {
  max-width: 720px;
  color: #2a2a2a;
  font-size: 1.03rem;
}

.meta {
  color: var(--muted);
  font-size: 0.94rem;
}

.text-link {
  color: var(--text);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.text-link.strong {
  text-decoration: none;
}

.text-link.strong:hover {
  text-decoration: underline;
  text-underline-offset: 3px;
}

.plain-list {
  margin: 0;
  padding-left: 18px;
}

.entry-item {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px 20px;
}

.contact-list {
  display: grid;
  gap: 14px;
}

.contact-item {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 16px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.contact-label {
  color: var(--muted);
}

.detail-hero {
  margin-bottom: 28px;
}

.detail-metadata {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 18px;
}

.figure-block {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px;
}

.placeholder-figure {
  aspect-ratio: 16/9;
  background: linear-gradient(180deg, #ecece8 0%, #f7f7f4 100%);
  border: 1px dashed #c6c6bf;
  border-radius: 10px;
  display: grid;
  place-items: center;
  color: var(--muted);
}

.code-block {
  background: #111111;
  color: #f5f5f2;
  padding: 16px;
  border-radius: 12px;
  overflow-x: auto;
  font-size: 0.92rem;
}

@media (max-width: 720px) {
  .detail-metadata,
  .contact-item {
    grid-template-columns: 1fr;
  }
}

/* section spacing */

.page-header {
  margin-bottom: 25px;
}

.section + .section {
  margin-top: 35px;
}

.section h2 {
  margin-bottom: 12px;
}

.section h3 {
  margin: 0 0 8px 0;
  font-size: 1rem;
}

.section p {
  margin-bottom: 14px;
}

.section ul {
  margin: 10px 0 0 0;
  padding-left: 20px;
}

.section li {
  margin-bottom: 8px;
  line-height: 1.7;
}

/* two-column layout for About */
.split-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
}

/* cleaner list style */
.plain-list {
  margin: 10px 0 0 0;
  padding-left: 20px;
}

.plain-list li {
  margin-bottom: 8px;
}

/* education card spacing */
.entry-item {
  margin-top: 12px;
  padding: 18px 18px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--surface);
}

.entry-item .meta {
  margin-bottom: 12px;
  color: var(--muted);
}

/* optional meta paragraph */
.meta {
  color: var(--muted);
  font-size: 0.95rem;
}

/* mobile */
@media (max-width: 900px) {
  .split-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }
}

.course-total {
  margin-top: 16px;
}

.course-year {
  margin-left: 12px;
  margin-top: 6px;
}

.course-semester {
  margin-left: 18px;
  margin-top: 4px;
}

.course-list {
  margin: 6px 0 10px 22px;
  padding-left: 16px;
}

/* project and publications */
.detail-shell {
  max-width: 760px;
}

.detail-summary {
  max-width: 680px;
  color: var(--muted);
  font-size: 0.98rem;
  margin-bottom: 18px;
}

.project-meta-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}
.publication-meta-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.meta-block {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.meta-label {
  color: var(--muted);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 600;
}

.detail-image {
  width: 100%;
  border-radius: 1px;
}

.figure-caption {
  margin-top: 10px;
  color: var(--muted);
  font-size: 0.9rem;
}

.video-wrapper {
  width: 100%;
  aspect-ratio: 16 / 9;
}

.video-wrapper iframe,
.video-wrapper video {
  width: 100%;
  height: 100%;
  border: 0;
  border-radius: 1px;
  background: #ecece8;
}

.keyword-line {
  margin-top: 20px;
  margin-bottom: 20px;
  color: var(--muted);
  font-size: 0.95rem;
}

.citation-toggle {
  display: inline-block;
}

.citation-toggle summary {
  list-style: none;
  cursor: pointer;
}

.citation-toggle summary::-webkit-details-marker {
  display: none;
}

.citation-inline {
  margin-top: 10px;
  padding: 14px 16px;
  min-width: 320px;
  max-width: 560px;
  white-space: pre-wrap;
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface-soft);
  font-size: 0.85rem;
  line-height: 1.5;
  color: var(--text);
}

@media (max-width: 720px) {
  .project-meta-grid {
    grid-template-columns: 1fr;
  }
}

/* citation */
.chip-button {
  appearance: none;
  cursor: pointer;
  color: inherit;
  font: inherit;
}

.citation-modal {
  position: fixed;
  inset: 0;
  z-index: 2000;
}

.citation-modal.hidden {
  display: none;
}

.citation-modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.35);
}

.citation-modal-dialog {
  position: relative;
  width: min(640px, calc(100% - 32px));
  margin: 10vh auto 0;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 16px;
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.18);
  overflow: hidden;
}

.citation-modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--line);
}

.citation-modal-close {
  appearance: none;
  border: 0;
  background: transparent;
  font: inherit;
  font-size: 1.4rem;
  line-height: 1;
  cursor: pointer;
  color: var(--muted);
}

.citation-modal-body {
  margin: 0;
  padding: 20px;
  white-space: pre-wrap;
  overflow-x: auto;
  font-size: 0.9rem;
  line-height: 1.6;
  background: var(--surface);
}

body.modal-open {
  overflow: hidden;
}

/* figure */
.figure-group {
  margin-top: 14px;
}

.figure-slider {
  display: grid;
  grid-template-columns: 56px 1fr 56px;
  gap: 16px;
  align-items: center;
}

.slider-figure {
  margin: 0;
}

.figure-nav {
  appearance: none;
  border: 1px solid var(--line);
  background: var(--surface);
  border-radius: 999px;
  width: 48px;
  height: 48px;
  cursor: pointer;
  font-size: 1.6rem;
  line-height: 1;
}

.figure-nav:hover {
  background: var(--surface-soft);
}

.figure-thumbs {
  display: flex;
  gap: 10px;
  margin-top: 14px;
  overflow-x: auto;
}

.figure-thumb {
  appearance: none;
  border: 1px solid var(--line);
  background: var(--surface);
  border-radius: 10px;
  padding: 4px;
  cursor: pointer;
  flex: 0 0 auto;
}

.figure-thumb img {
  width: 88px;
  height: 60px;
  object-fit: cover;
  border-radius: 6px;
}

.figure-thumb.active {
  border-color: var(--text);
}