/* ─── Reset ─────────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }

/* ─── Base ───────────────────────────────────────────────────────────────── */
body {
  font-family: 'Inter', sans-serif;
  color: #ffffff;
  background: #111111;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: #ffffff; text-decoration: none; }
a:hover { text-decoration: underline; }

img { display: block; max-width: 100%; }

/* ─── Nav ────────────────────────────────────────────────────────────────── */
nav {
  position: sticky;
  top: 0;
  background: rgba(17, 17, 17, 0.96);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid #242424;
  z-index: 100;
}

.nav-inner {
  max-width: 960px;
  margin: auto;
  padding: 0 1.5rem;
  height: 58px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-brand {
  font-weight: 700;
  font-size: 1rem;
  color: #ffffff;
  text-decoration: none;
  letter-spacing: -0.01em;
}

.nav-links {
  display: flex;
  gap: 1.75rem;
  list-style: none;
}

.nav-links a {
  font-size: 0.875rem;
  font-weight: 500;
  color: #aaaaaa;
  text-decoration: none;
  transition: color 0.2s, background 0.2s;
  padding: 0.3rem 0.55rem;
  border-radius: 4px;
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 50%;
  right: 50%;
  height: 2px;
  background: #2dd4bf;
  border-radius: 2px;
  transition: left 0.2s ease, right 0.2s ease;
}

.nav-links a:hover {
  color: #ffffff;
  background: rgba(45, 212, 191, 0.08);
  text-decoration: none;
}

.nav-links a:hover::after {
  left: 0.55rem;
  right: 0.55rem;
}

.nav-links a.active::after {
  left: 0.55rem;
  right: 0.55rem;
  background: #4f8ef7;
}

.nav-links a.active {
  color: #4f8ef7;
  background: rgba(79, 142, 247, 0.08);
}

/* ─── Page wrapper ───────────────────────────────────────────────────────── */
.page {
  max-width: 960px;
  margin: auto;
  padding: 3.5rem 1.5rem 5rem;
}

/* ─── Page header ────────────────────────────────────────────────────────── */
.page-header {
  margin-bottom: 2.5rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid #1c1c1c;
}

.page-header h1 {
  font-size: 1.875rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: #ffffff;
}

.page-header p {
  margin-top: 0.4rem;
  color: #aaaaaa;
  font-size: 0.95rem;
}

/* ─── Hero ───────────────────────────────────────────────────────────────── */
.hero {
  max-width: 960px;
  margin: auto;
  padding: 4rem 1.5rem 3rem;
  display: grid;
  grid-template-columns: 1fr 200px;
  gap: 3rem;
  align-items: center;
}

.hero-name {
  font-size: 2.75rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.1;
  color: #ffffff;
}

.hero-title {
  margin-top: 0.5rem;
  font-size: 1rem;
  font-weight: 400;
  color: #cccccc;
}

.hero-bio {
  margin-top: 1rem;
  font-size: 0.95rem;
  color: #cccccc;
  max-width: 500px;
  line-height: 1.75;
}

.hero-actions {
  margin-top: 1.5rem;
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

/* Photo */
.hero-photo {
  width: 180px;
  height: 180px;
  border-radius: 50%;
  overflow: hidden;
  background: #111111;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid #2a2a2a;
  flex-shrink: 0;
}

.hero-photo img { width: 100%; height: 100%; object-fit: cover; }

.hero-photo .photo-placeholder {
  font-size: 3.5rem;
  color: #2a2a2a;
}

/* ─── Buttons ────────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.55rem 1.25rem;
  border-radius: 4px;
  font-size: 0.875rem;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.15s;
  cursor: pointer;
  border: 1px solid transparent;
  line-height: 1;
}

.btn-primary {
  background: #2dd4bf;
  color: #0a0a0a;
  border-color: #2dd4bf;
}
.btn-primary:hover { background: #22bfab; border-color: #22bfab; text-decoration: none; }

.btn-outline {
  background: transparent;
  color: #ffffff;
  border-color: #444444;
}
.btn-outline:hover { border-color: #2dd4bf; color: #2dd4bf; text-decoration: none; }

.btn-ghost {
  background: transparent;
  color: #888888;
  border-color: #222222;
}
.btn-ghost:hover { color: #ffffff; border-color: #444444; text-decoration: none; }

/* ─── Section ────────────────────────────────────────────────────────────── */
.section { margin-top: 3rem; }

.section-title {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: #999999;
  margin-bottom: 1.25rem;
}

/* ─── Interest cards ─────────────────────────────────────────────────────── */
.interests-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  border: 1px solid #1c1c1c;
  border-radius: 6px;
  overflow: hidden;
}

.interest-card {
  padding: 1.5rem;
  background: #1a1a1a;
}

.interest-card .icon {
  font-size: 1.3rem;
  margin-bottom: 0.75rem;
}

.interest-card h3 {
  font-size: 0.875rem;
  font-weight: 600;
  color: #ffffff;
  margin-bottom: 0.4rem;
}

.interest-card p {
  font-size: 0.82rem;
  color: #bbbbbb;
  line-height: 1.6;
}

/* ─── News / Highlights ──────────────────────────────────────────────────── */
.news-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.news-item {
  display: flex;
  gap: 1.25rem;
  align-items: baseline;
  font-size: 0.875rem;
  padding: 0.7rem 0;
  border-bottom: 1px solid #111111;
}

.news-item:last-child { border-bottom: none; }

.news-date {
  flex-shrink: 0;
  font-size: 0.75rem;
  font-weight: 600;
  color: #aaaaaa;
  width: 72px;
  font-variant-numeric: tabular-nums;
}

.news-text { color: #cccccc; line-height: 1.6; }
.news-text strong { color: #ffffff; font-weight: 600; }

/* ─── Project cards ──────────────────────────────────────────────────────── */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  border: 1px solid #1c1c1c;
  border-radius: 6px;
  overflow: hidden;
}

.project-card {
  padding: 1.5rem;
  background: #1a1a1a;
  transition: background 0.15s;
  display: flex;
  flex-direction: column;
}

.project-card:hover { background: #222222; }

.project-card h3 {
  font-size: 0.9rem;
  font-weight: 600;
  color: #ffffff;
  margin-bottom: 0.5rem;
}

.project-card p {
  font-size: 0.845rem;
  color: #cccccc;
  line-height: 1.65;
  flex: 1;
  margin-bottom: 1rem;
}

.project-card p strong { color: #ffffff; }

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-bottom: 0.9rem;
}

.tag {
  background: transparent;
  color: #999999;
  font-size: 0.72rem;
  padding: 0.2rem 0.5rem;
  border-radius: 3px;
  font-weight: 500;
  border: 1px solid #333333;
}

.project-links {
  display: flex;
  gap: 1rem;
}

.project-links a {
  font-size: 0.82rem;
  font-weight: 500;
  color: #aaaaaa;
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.3rem;
  transition: color 0.15s;
}

.project-links a:hover { color: #2dd4bf; text-decoration: none; }

/* ─── Timeline (Experience) — alternating ────────────────────────────────── */
.timeline {
  position: relative;
}

/* center vertical line */
.timeline::before {
  content: '';
  position: absolute;
  left: 50%;
  transform: translateX(-50%) scaleY(0);
  transform-origin: top center;
  top: 0; bottom: 0;
  width: 1px;
  background: linear-gradient(to bottom, #2dd4bf 0%, #1c1c1c 100%);
  transition: transform 1.2s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 0;
}

.timeline.tl-started::before { transform: translateX(-50%) scaleY(1); }

/* full-width row — padding shifts card left or right */
.timeline-item {
  position: relative;
  width: 100%;
  display: flex;
  margin-bottom: 2.5rem;
}

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

/* odd → LEFT */
.timeline-item:nth-child(odd) {
  padding-right: calc(50% + 2rem);
  justify-content: flex-end;
}

/* even → RIGHT */
.timeline-item:nth-child(even) {
  padding-left: calc(50% + 2rem);
  justify-content: flex-start;
}

/* dot pinned exactly on the center line */
.timeline-dot {
  position: absolute;
  left: calc(50% - 5px);
  top: 1.1rem;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: #111111;
  border: 1px solid #333333;
  transition: border-color 0.35s ease, transform 0.35s ease;
  z-index: 1;
}

.timeline-item.tl-visible .timeline-dot {
  border-color: #2dd4bf;
  transform: scale(1.35);
}

/* card — animates in from its side */
.tl-card {
  width: 100%;
  padding: 1.25rem;
  border: 1px solid #242424;
  border-radius: 6px;
  background: #1a1a1a;
  opacity: 0;
  transition: border-color 0.2s,
              opacity 0.55s cubic-bezier(0.4,0,0.2,1),
              transform 0.55s cubic-bezier(0.4,0,0.2,1);
}

.timeline-item:nth-child(odd)  .tl-card { transform: translateX(-24px); }
.timeline-item:nth-child(even) .tl-card { transform: translateX(24px); }

.timeline-item.tl-visible .tl-card { opacity: 1; transform: translateX(0); }
.tl-card:hover { border-color: #2dd4bf33; }

/* mobile: single left-aligned column */
@media (max-width: 700px) {
  .timeline::before { left: 14px; }

  .timeline-item,
  .timeline-item:nth-child(odd),
  .timeline-item:nth-child(even) {
    padding-left: 2.5rem;
    padding-right: 0;
    justify-content: flex-start;
  }

  .timeline-dot { left: 9px; }

  .timeline-item:nth-child(odd)  .tl-card,
  .timeline-item:nth-child(even) .tl-card { transform: translateX(16px); }
}

.timeline-item .org-logo {
  height: 40px;
  width: auto;
  object-fit: contain;
  margin-bottom: 0.65rem;
  border-radius: 4px;
  background: #111111;
  padding: 4px 8px;
}

.timeline-item h3 {
  font-size: 0.95rem;
  font-weight: 600;
  color: #ffffff;
}

.timeline-item .meta {
  font-size: 0.8rem;
  color: #999999;
  margin: 0.3rem 0 0.75rem;
}

.timeline-item .meta span { margin-right: 0.75rem; }

.timeline-item ul {
  list-style: none;
  padding-left: 0;
}

.timeline-item ul li {
  font-size: 0.875rem;
  color: #cccccc;
  margin-bottom: 0.4rem;
  line-height: 1.65;
  padding-left: 1rem;
  position: relative;
}

.timeline-item ul li::before {
  content: '–';
  position: absolute;
  left: 0;
  color: #666666;
}

.timeline-item ul li strong { color: #ffffff; font-weight: 600; }

/* ─── Education staircase ─────────────────────────────────────────────────── */
.staircase {
  display: flex;
  align-items: flex-end;  /* all columns share the same bottom baseline */
  gap: 3px;
  margin-top: 1.5rem;
}

/* Each column is a step — grows taller left→right */
.stair {
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: 1.25rem 1.1rem 0 1.1rem;
  background: #1a1a1a;
  border: 1px solid #242424;
  border-bottom: none;
  border-top: 2px solid #2dd4bf;
  border-radius: 6px 6px 0 0;
  overflow: hidden;
  /* Start squished at bottom, grow upward */
  opacity: 0;
  transform: scaleY(0.05);
  transform-origin: bottom center;
  transition: opacity 0.5s cubic-bezier(0.4,0,0.2,1),
              transform 0.65s cubic-bezier(0.34, 1.3, 0.64, 1);
}

.stair.stair-visible { opacity: 1; transform: scaleY(1); }

/* The riser div fills empty space at the bottom, making each step taller */
.stair-riser { flex: 1; }
.stair:nth-child(1) .stair-riser { min-height: 1.5rem; }
.stair:nth-child(2) .stair-riser { min-height: 4.5rem; }
.stair:nth-child(3) .stair-riser { min-height: 8rem; }

/* Teal baseline bar that appears after all steps rise */
.staircase-base {
  height: 3px;
  background: linear-gradient(to right, #2dd4bf22, #2dd4bf88, #2dd4bf);
  border-radius: 0 0 4px 4px;
  opacity: 0;
  transform: scaleX(0);
  transform-origin: left;
  transition: opacity 0.4s, transform 0.6s cubic-bezier(0.4,0,0.2,1);
}

.staircase-base.base-visible { opacity: 1; transform: scaleX(1); }

/* Top row: step number + logo + badge */
.stair-top {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 0.9rem;
  flex-wrap: wrap;
}

.stair-num {
  font-size: 1.4rem;
  font-weight: 800;
  color: #2dd4bf;
  letter-spacing: -0.04em;
  line-height: 1;
  flex-shrink: 0;
}

.stair-logo {
  height: 32px;
  width: 48px;
  object-fit: contain;
  background: #111111;
  border-radius: 3px;
  padding: 3px 5px;
  flex-shrink: 0;
}

.stair-badge {
  font-size: 0.62rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #2dd4bf;
  background: #2dd4bf18;
  border: 1px solid #2dd4bf44;
  border-radius: 3px;
  padding: 0.15rem 0.4rem;
}

.stair-school {
  font-size: 0.82rem;
  font-weight: 600;
  color: #ffffff;
  line-height: 1.35;
  margin-bottom: 0.35rem;
}

.stair-degree {
  font-size: 0.78rem;
  color: #cccccc;
  margin-bottom: 0.15rem;
}

.stair-gpa {
  font-size: 0.75rem;
  color: #2dd4bf;
  font-weight: 600;
  margin-bottom: 0.35rem;
}

.stair-dates {
  font-size: 0.72rem;
  color: #aaaaaa;
  margin-bottom: 0.5rem;
}

.stair-note {
  font-size: 0.72rem;
  color: #999999;
  font-style: italic;
  line-height: 1.5;
  margin-bottom: 0.5rem;
}

/* ─── Skills ─────────────────────────────────────────────────────────────── */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.skill-group h3 {
  font-size: 0.7rem;
  font-weight: 700;
  color: #999999;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 0.75rem;
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.skill-tag {
  background: transparent;
  color: #cccccc;
  font-size: 0.82rem;
  padding: 0.3rem 0.75rem;
  border-radius: 3px;
  font-weight: 400;
  border: 1px solid #333333;
}

/* ─── Publication cards ──────────────────────────────────────────────────── */
.pub-list {
  display: flex;
  flex-direction: column;
}

.pub-item {
  padding: 1.5rem 0;
  border-bottom: 1px solid #111111;
  display: flex;
  gap: 1.25rem;
  align-items: flex-start;
}

.pub-item:first-child { padding-top: 0; }
.pub-item:last-child { border-bottom: none; }

.pub-logo {
  width: 90px;
  height: 90px;
  object-fit: contain;
  flex-shrink: 0;
  border-radius: 6px;
  background: #1a1a1a;
  padding: 10px;
  border: 1px solid #242424;
}

.pub-body { flex: 1; }

.pub-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.5rem;
  flex-wrap: wrap;
}

.pub-venue {
  font-size: 0.7rem;
  font-weight: 700;
  color: #aaaaaa;
  background: transparent;
  padding: 0.2rem 0.5rem;
  border-radius: 3px;
  border: 1px solid #333333;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.pub-venue-highlight {
  color: #2dd4bf;
  border-color: #2dd4bf44;
}

.pub-year {
  font-size: 0.75rem;
  color: #999999;
  margin-left: auto;
}

.pub-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: #ffffff;
  margin-bottom: 0.3rem;
  line-height: 1.45;
}

.pub-authors {
  font-size: 0.82rem;
  color: #aaaaaa;
  margin-bottom: 0.5rem;
}

.pub-abstract {
  font-size: 0.845rem;
  color: #cccccc;
  line-height: 1.65;
  margin-bottom: 0.75rem;
}

.pub-abstract strong { color: #ffffff; }

.pub-links { display: flex; gap: 1rem; }

.pub-link {
  font-size: 0.82rem;
  font-weight: 500;
  color: #aaaaaa;
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.3rem;
  transition: color 0.15s;
}

.pub-link:hover { color: #2dd4bf; text-decoration: none; }

/* ─── Peer review list ───────────────────────────────────────────────────── */
.review-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.review-item {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  font-size: 0.875rem;
  color: #cccccc;
  line-height: 1.5;
}

.review-icon { color: #2dd4bf; font-size: 0.75rem; flex-shrink: 0; }
.review-item strong { color: #ffffff; }

/* ─── Honors / Talks / Awards ────────────────────────────────────────────── */
.honor-list {
  display: flex;
  flex-direction: column;
}

.honor-item {
  display: flex;
  gap: 1.25rem;
  padding: 1.4rem 0;
  border-bottom: 1px solid #111111;
  align-items: flex-start;
}

.honor-item:last-child { border-bottom: none; }

.honor-icon-wrap {
  width: 38px;
  height: 38px;
  border-radius: 4px;
  background: #1a1a1a;
  border: 1px solid #2a2a2a;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 2px;
}

.honor-icon-wrap.honor-gold  { border-color: #333333; }
.honor-icon-wrap.honor-bronze { border-color: #2a2a2a; }

.honor-icon { font-size: 0.95rem; color: #999999; }

.honor-icon-wrap.honor-gold .honor-icon  { color: #aaaaaa; }
.honor-icon-wrap.honor-bronze .honor-icon { color: #888888; }

.honor-body { flex: 1; }

.honor-meta {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  margin-bottom: 0.35rem;
  flex-wrap: wrap;
}

.honor-org {
  font-size: 0.72rem;
  font-weight: 600;
  color: #999999;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.honor-date {
  font-size: 0.72rem;
  color: #888888;
  margin-left: auto;
}

.honor-title {
  font-size: 0.92rem;
  font-weight: 600;
  color: #ffffff;
  margin-bottom: 0.4rem;
  line-height: 1.4;
}

.honor-desc {
  font-size: 0.845rem;
  color: #cccccc;
  line-height: 1.65;
}

.honor-desc strong { color: #ffffff; }
.honor-desc em { font-style: italic; color: #aaaaaa; }

/* ─── Contact ────────────────────────────────────────────────────────────── */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 3rem;
  align-items: start;
}

.contact-info h2 {
  font-size: 1.1rem;
  font-weight: 600;
  color: #ffffff;
  margin-bottom: 0.75rem;
}

.contact-info p {
  font-size: 0.875rem;
  color: #aaaaaa;
  margin-bottom: 1.5rem;
  line-height: 1.7;
}

.social-links {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.social-link {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.875rem;
  color: #cccccc;
  text-decoration: none;
  transition: color 0.15s;
}

.social-link:hover { color: #2dd4bf; text-decoration: none; }
.social-link i { width: 16px; color: #aaaaaa; }

/* Contact Form */
.contact-form .field { margin-bottom: 1rem; }

.contact-form label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  color: #aaaaaa;
  margin-bottom: 0.35rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 0.65rem 0.9rem;
  border: 1px solid #242424;
  border-radius: 4px;
  font-size: 0.875rem;
  font-family: inherit;
  color: #ffffff;
  background: #1a1a1a;
  transition: border-color 0.15s;
  outline: none;
}

.contact-form input:focus,
.contact-form textarea:focus { border-color: #2dd4bf; }

.contact-form textarea { resize: vertical; min-height: 130px; }

/* ─── Divider ────────────────────────────────────────────────────────────── */
.divider {
  border: none;
  border-top: 1px solid #111111;
  margin: 2.5rem 0;
}

/* ─── Footer ─────────────────────────────────────────────────────────────── */
footer {
  border-top: 1px solid #111111;
  padding: 1.75rem 1.5rem;
  text-align: center;
}

footer p { font-size: 0.8rem; color: #999999; }
footer a { color: #aaaaaa; text-decoration: none; transition: color 0.15s; }
footer a:hover { color: #2dd4bf; }

/* ─── Hamburger toggle button (hidden on desktop) ────────────────────────── */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  padding: 6px;
  background: transparent;
  border: 1px solid #2a2a2a;
  border-radius: 4px;
  cursor: pointer;
  flex-shrink: 0;
}

.nav-toggle span {
  display: block;
  height: 2px;
  background: #aaaaaa;
  border-radius: 2px;
  transition: transform 0.25s, opacity 0.25s;
}

/* Animate to × when open */
nav.nav-open .nav-toggle span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
nav.nav-open .nav-toggle span:nth-child(2) { opacity: 0; }
nav.nav-open .nav-toggle span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ─── Responsive ─────────────────────────────────────────────────────────── */
@media (max-width: 768px) {
  .nav-toggle { display: flex; }

  .nav-links {
    display: none;
    position: absolute;
    top: 58px;
    left: 0; right: 0;
    background: rgba(17, 17, 17, 0.98);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid #242424;
    flex-direction: column;
    padding: 0.75rem 1.5rem 1rem;
    gap: 0;
    z-index: 99;
  }

  nav.nav-open .nav-links { display: flex; }

  .nav-links li { width: 100%; }

  .nav-links a {
    display: block;
    padding: 0.65rem 0;
    font-size: 0.9rem;
    border-radius: 0;
    border-bottom: 1px solid #1c1c1c;
    background: transparent !important;
  }

  .nav-links li:last-child a { border-bottom: none; }

  /* No sliding underline needed in list view */
  .nav-links a::after { display: none; }

  .hero {
    grid-template-columns: 1fr;
    text-align: center;
    padding-top: 2.5rem;
  }

  .hero-text { order: 2; }
  .hero-photo { order: 1; margin: auto; width: 120px; height: 120px; }
  .hero-bio { max-width: 100%; }
  .hero-actions { justify-content: center; }

  .interests-grid { grid-template-columns: 1fr; }
  .projects-grid  { grid-template-columns: 1fr; }
  .skills-grid    { grid-template-columns: 1fr; }
  .contact-grid   { grid-template-columns: 1fr; }

  .pub-item   { flex-direction: column; }
  .pub-logo   { width: 36px; height: 36px; }
  .honor-item { flex-direction: column; }

  /* Collapse staircase to vertical list on mobile */
  .staircase { flex-direction: column; align-items: stretch; gap: 0.75rem; }
  .stair { border-radius: 6px; border-bottom: 1px solid #242424; border-top: 2px solid #2dd4bf; padding-bottom: 1.25rem; }
  .stair-riser { display: none; }
  .staircase-base { display: none; }
}

@media (max-width: 480px) {
  .hero-name { font-size: 2rem; }
}