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

:root {
  --bg:         #ffffff;
  --text:       #191714;
  --muted:      #7c7870;
  --border:     #dbd8d0;
  --font-sans:  'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-serif: 'Instrument Serif', Georgia, 'Times New Roman', serif;
  --page-inset: clamp(64px, 8vw, 110px);
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* --- HEADER --- */

header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px 48px;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}

.nav-name {
  font-size: 12.5px;
  font-weight: 500;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--text);
}

.nav-about {
  font-size: 11.5px;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--muted);
  transition: color 0.2s;
}

.nav-about:hover { color: var(--text); }

/* --- DESIGN DROPDOWN --- */

.nav-dropdown {
  position: relative;
}

/* invisible bridge fills the gap so hover doesn't break mid-travel */
.nav-dropdown::after {
  content: '';
  position: absolute;
  top: 100%;
  left: -20px;
  right: -20px;
  height: 16px;
}

.dropdown-trigger {
  display: flex;
  align-items: center;
  gap: 9px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  font-size: 11.5px;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--muted);
  font-family: var(--font-sans);
  transition: color 0.2s;
}

.dropdown-trigger:hover,
.nav-dropdown.open .dropdown-trigger { color: var(--text); }

.hamburger {
  display: flex;
  flex-direction: column;
  gap: 3.5px;
  flex-shrink: 0;
}

.hamburger span {
  display: block;
  width: 15px;
  height: 1.5px;
  background: currentColor;
  border-radius: 1px;
}

.dropdown-menu {
  position: absolute;
  top: calc(100% + 16px);
  left: 50%;
  transform: translateX(-50%) translateY(-6px);
  background: var(--bg);
  border: 1px solid var(--border);
  min-width: 170px;
  list-style: none;
  padding: 6px 0;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.18s ease, transform 0.18s ease;
}

.nav-dropdown:hover .dropdown-menu,
.nav-dropdown.open .dropdown-menu {
  opacity: 1;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}

.dropdown-menu li a {
  display: block;
  padding: 11px 22px;
  font-size: 11px;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--muted);
  text-decoration: none;
  transition: color 0.15s;
  white-space: nowrap;
}

.dropdown-menu li a:hover { color: var(--text); }

/* --- LINKEDIN --- */

.linkedin-link {
  display: flex;
  align-items: center;
  color: var(--muted);
  transition: color 0.2s;
  text-decoration: none;
}

.linkedin-link:hover { color: var(--text); }

.linkedin-link svg {
  width: 18px;
  height: 18px;
  display: block;
}

/* --- HERO --- */

#hero {
  height: calc(100vh - 65px);
  margin-top: 65px;
}

.hero-tagline {
  font-family: Arial, Helvetica, sans-serif;
  font-size: 22px;
  font-weight: 400;
  font-style: normal;
  line-height: 1.55;
  color: #000000;
  text-align: center;
  max-width: 680px;
  transition: opacity 0.3s ease;
}

.scroll-hint {
  position: fixed;
  left: 50%;
  transform: translateX(-50%);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  transition: opacity 0.4s ease;
}

/* --- STOOLLASSO --- */
.hero-draggable {
  position: fixed;
  height: auto;
  cursor: grab;
  user-select: none;
  z-index: 10;
  transition: opacity 0.4s ease;
}

#stoollasso {
  width: 180px;
}

#fishtoylasso {
  width: 200px;
}

/* --- WORKS GRID --- */

#works-grid {
  padding: 0 clamp(48px, 8vw, 120px) 80px;
}

.works-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.work-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  cursor: pointer;
}

.work-img-wrap {
  width: 100%;
  overflow: hidden;
  background: #f0eeea;
  position: relative;
}

.work-img-wrap img,
.work-img-wrap video {
  width: 100%;
  height: auto;
  display: block;
  transition: transform 0.4s ease;
}

.work-card:hover .work-img-wrap video {
  transform: scale(1.04);
}

.work-card:hover .work-img-wrap img {
  transform: scale(1.04);
}

.work-img-empty {
  background: #ebebeb;
}

.work-card--constrained .work-img-wrap {
  background: none;
}

.work-title {
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--muted);
  font-family: var(--font-sans);
}

/* --- LIGHTBOX --- */

.lightbox {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.92);
  z-index: 9998;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
}

.lightbox.active {
  opacity: 1;
  pointer-events: auto;
}

.lightbox-img,
.lightbox-video {
  max-width: 80vw;
  max-height: 85vh;
  width: auto;
  height: auto;
  display: block;
  object-fit: contain;
}

.lightbox-close {
  position: absolute;
  top: 24px;
  right: 32px;
  background: none;
  border: none;
  color: #ffffff;
  font-size: 22px;
  cursor: pointer;
  padding: 8px;
  line-height: 1;
  opacity: 0.8;
  transition: opacity 0.2s;
}

.lightbox-close:hover { opacity: 1; }

.lightbox-prev,
.lightbox-next {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: #ffffff;
  font-size: 28px;
  cursor: pointer;
  padding: 20px 24px;
  opacity: 0.7;
  transition: opacity 0.2s;
}

.lightbox-prev:hover,
.lightbox-next:hover { opacity: 1; }

.lightbox-prev { left: 24px; }
.lightbox-next { right: 24px; }

.lbv-wrapper {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
}

.lightbox-video { cursor: pointer; }

.lbv-controls {
  align-items: center;
  gap: 12px;
  width: min(80vw, 700px);
  background: rgba(255,255,255,0.08);
  padding: 10px 16px;
  border-radius: 8px;
}

.lbv-playpause {
  background: none;
  border: none;
  color: #fff;
  font-size: 16px;
  cursor: pointer;
  padding: 0 4px;
  line-height: 1;
  flex-shrink: 0;
}

.lbv-scrubber {
  flex: 1;
  height: 4px;
  appearance: none;
  -webkit-appearance: none;
  background: rgba(255,255,255,0.25);
  border-radius: 2px;
  cursor: pointer;
  accent-color: #fff;
}

.lbv-scrubber::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: #fff;
  cursor: pointer;
}

.lbv-time {
  color: rgba(255,255,255,0.7);
  font-size: 12px;
  font-family: monospace;
  white-space: nowrap;
  flex-shrink: 0;
}

/* --- PROJECT BANNER --- */

.project-banner {
  margin-top: calc(65px + var(--page-inset));
  padding: 0 var(--page-inset);
  line-height: 0;
}

.project-banner img {
  width: 100%;
  height: auto;
  display: block;
}

/* --- PROJECT PAGE (Stool.html etc.) --- */

.project-page {
  padding-top: 60px;
  padding-bottom: 100px;
}

.project-page--has-banner {
  padding-top: 40px;
}

.project-page--no-banner {
  padding-top: 140px;
}

.project-page-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: start;
  padding: 0 var(--page-inset);
  gap: 48px;
}

.project-page-left {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.project-page-title {
  font-family: var(--font-sans);
  font-size: clamp(24px, 3vw, 42px);
  font-weight: 500;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  line-height: 1.2;
  color: var(--text);
}

.project-page-meta {
  display: flex;
  flex-direction: column;
  gap: 8px;
  list-style: disc;
  padding-left: 16px;
}

.project-page-meta li {
  font-size: 12px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
  line-height: 1.5;
}

.project-divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 0;
}

.project-page-desc {
  font-size: 15px;
  line-height: 1.85;
  color: var(--text);
  font-weight: 300;
}

.fishtoy-section {
  display: flex;
  align-items: start;
  gap: 48px;
  padding: 40px var(--page-inset) 80px;
}

.fishtoy-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  flex-shrink: 0;
  width: 45%;
}

.fishtoy-grid img {
  width: 100%;
  height: auto;
  display: block;
}

.fishtoy-section-text {
  padding-top: 8px;
}

.sketchbook-section {
  display: flex;
  align-items: start;
  gap: 48px;
  padding: 40px var(--page-inset) 80px;
}

.sketchbook-text {
  flex: 1;
  padding-top: 8px;
}

.sketchbook-title {
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--text);
  margin-bottom: 16px;
}

.sketchbook-desc {
  font-size: 15px;
  line-height: 1.85;
  color: var(--text);
  font-weight: 300;
}

.type-section {
  display: flex;
  align-items: flex-start;
  gap: 64px;
  padding: 40px var(--page-inset) 80px;
}

.type-images {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.type-images img {
  width: 100%;
  height: auto;
  display: block;
}

.type-text {
  flex: 1;
  padding-top: 8px;
}

.type-design-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  padding: 0 var(--page-inset) 80px;
}

.type-design-grid img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  aspect-ratio: 3 / 4;
}

.type-placeholder {
  aspect-ratio: 3 / 4;
  background: #e5e5e5;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-sans);
  font-size: 13px;
  color: #aaa;
  letter-spacing: 0.05em;
}

.nasa-contributions {
  padding: 40px var(--page-inset) 80px;
}

.nasa-contributions .sketchbook-title {
  font-size: 28px;
  margin-bottom: 12px;
}

.nasa-contributions .sketchbook-desc {
  font-size: 19px;
  margin-bottom: 40px;
}

.nasa-contrib-row {
  display: flex;
  gap: 48px;
  align-items: flex-start;
  margin-bottom: 56px;
}

.nasa-contrib-row:last-child {
  margin-bottom: 0;
}

.nasa-contrib-text {
  flex: 1 1 0;
}

.nasa-contrib-label {
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 10px;
}

.nasa-contrib-copy {
  font-size: 15px;
  line-height: 1.85;
  color: var(--text);
  font-weight: 300;
}

.nasa-contrib-images {
  flex: 1;
  display: flex;
  gap: 16px;
}

.nasa-contrib-images img {
  flex: 1;
  min-width: 0;
  width: 100%;
  height: auto;
  display: block;
}

.nasa-ltv-images {
  flex: 1;
  display: flex;
  gap: 16px;
}

.nasa-ltv-col {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.nasa-ltv-col img {
  width: 100%;
  height: auto;
  display: block;
}

.nasa-ltv-col--single {
  display: flex;
  align-items: flex-start;
}

.nasa-ltv-col--single img {
  height: auto;
}

.nasa-signal-item {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.nasa-signal-item img {
  width: 100%;
  height: auto;
  display: block;
}

.project-page-images img,
.project-page-images video {
  width: 100%;
  height: auto;
  display: block;
  border: 1px solid var(--border);
}

.project-research {
  display: grid;
  grid-template-columns: 2.5fr 1fr;
  gap: 40px;
  align-items: start;
  padding: 60px var(--page-inset) 80px;
}

.project-slides-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.project-slides-grid img {
  width: 100%;
  height: auto;
  display: block;
}

.project-research-text {
  font-size: 19px;
  line-height: 1.75;
  color: var(--text);
  font-weight: 300;
  padding-top: 20px;
}

.project-insight {
  display: grid;
  grid-template-columns: 1fr 2.5fr;
  gap: 40px;
  align-items: start;
  padding: 0 var(--page-inset) 80px;
}

.project-insight-text {
  font-size: 19px;
  line-height: 1.75;
  color: var(--text);
  font-weight: 300;
  padding-top: 20px;
}

.project-insight img {
  width: 100%;
  height: auto;
  display: block;
}

@media (max-width: 780px) {
  .project-insight { grid-template-columns: 1fr; padding: 0 24px 60px; }
}

.project-concept {
  display: grid;
  grid-template-columns: 2fr 2fr;
  gap: 48px;
  align-items: start;
  padding: 0 var(--page-inset) 80px;
}

.project-concept-slides {
  display: grid;
  grid-template-columns: 1.5fr 1.5fr;
  gap: 12px;
}

.project-concept-slides img {
  width: 100%;
  height: auto;
  display: block;
}

.project-concept-slides img:nth-child(1) {
  grid-row: 1;
  grid-column: 1;
}

.project-concept-slides img:nth-child(2) {
  grid-row: 2;
  grid-column: 1;
}

.project-concept-slides img:nth-child(3) {
  grid-row: 1 / 3;
  grid-column: 2;
}

.project-final-slides {
  display: flex;
  gap: 16px;
  padding: 0 var(--page-inset) 0;
}

.project-final-slides:last-child {
  padding-bottom: 80px;
}

.project-final-slides + .project-final-slides {
  padding-top: 16px;
}

.project-final-slides > img,
.project-final-slides > video {
  width: 50%;
  height: auto;
  display: block;
}

.project-final-slides--stacked {
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: auto auto;
}

.project-final-slides--stacked img {
  width: 100%;
  height: auto;
  display: block;
}

.project-final-slides--stacked img:nth-child(1) {
  grid-row: 1;
  grid-column: 1;
}

.project-final-slides--stacked img:nth-child(2) {
  grid-row: 1;
  grid-column: 2;
  align-self: end;
}

.project-final-slides--stacked img:nth-child(3) {
  grid-row: 2;
  grid-column: 1;
}

.project-concept-text {
  display: flex;
  flex-direction: column;
  gap: 24px;
  padding-top: 20px;
}

.project-concept-text p {
  font-size: 15px;
  line-height: 1.7;
  color: var(--text);
  font-weight: 300;
}

.project-concept-text img {
  width: 100%;
  height: auto;
  display: block;
}

.sketchbook-fade {
  position: relative;
  width: 100%;
  aspect-ratio: 895 / 655;
}

.sketchbook-fade-img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
  opacity: 0;
  animation: sketchbook-crossfade 8s ease-in-out infinite;
}

.sketchbook-fade-img--b {
  animation-delay: -4s;
}

@keyframes sketchbook-crossfade {
  0%, 43.75%   { opacity: 1; pointer-events: auto; }
  50%, 93.75%  { opacity: 0; pointer-events: none; }
  100%         { opacity: 1; pointer-events: auto; }
}

@media (max-width: 780px) {
  .project-concept { grid-template-columns: 1fr; padding: 40px 24px 60px; }
  .concept-slide6 { display: none; }
}

@media (max-width: 780px) {
  .project-page { padding: 120px 0 80px; }
  .project-page-split { grid-template-columns: 1fr; padding: 0 24px; }
  .project-banner { padding: 0 24px; }
  .project-research { grid-template-columns: 1fr; padding: 40px 24px 60px; }
}

@media (max-width: 780px) {
  #works-grid { padding: 0 24px 60px; }
  #installation-page,
  #web-based-page { padding: 120px 24px 60px; }
  .works-row { grid-template-columns: repeat(2, 1fr); gap: 12px; }
}

/* --- INSTALLATION PAGE --- */

#installation-page,
#web-based-page {
  padding: 140px 48px 80px;
}

.installation-heading {
  font-family: var(--font-sans);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 40px;
}

.installation-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

@media (max-width: 780px) {
  #installation-page { padding: 120px 24px 60px; }
  .installation-grid { grid-template-columns: repeat(2, 1fr); }
}

/* --- WORK SECTION --- */

#work {
  padding: 80px 48px 60px;
  border-top: 1px solid var(--border);
}

.section-label {
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 56px;
}

.project-list { list-style: none; }

.project-item {
  border-top: 1px solid var(--border);
  padding: 42px 0;
  display: grid;
  grid-template-columns: 56px 1fr 80px;
  gap: 0 28px;
  align-items: start;
}

.project-item:last-child {
  border-bottom: 1px solid var(--border);
}

.project-item--with-image {
  grid-template-columns: 56px 260px 1fr 80px;
  align-items: start;
}

.project-item-img {
  width: 100%;
  height: auto;
  object-fit: contain;
  display: block;
}

.project-num {
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--muted);
  padding-top: 7px;
}

.project-body {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.project-title {
  font-family: var(--font-serif);
  font-size: clamp(22px, 2.6vw, 34px);
  font-weight: 400;
  line-height: 1.18;
  letter-spacing: -0.01em;
  transition: letter-spacing 0.4s ease;
}

.project-item:hover .project-title { letter-spacing: 0.015em; }

.project-desc {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.7;
  max-width: 540px;
  font-weight: 300;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-top: 2px;
}

.tag {
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border: 1px solid var(--border);
  padding: 4px 11px;
  border-radius: 100px;
  color: var(--muted);
}

.project-bullets {
  list-style: disc;
  padding-left: 16px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.project-bullets li {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.6;
}

.project-link {
  display: inline-block;
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
  padding-bottom: 1px;
  margin-top: 6px;
  transition: opacity 0.2s;
}

.project-link:hover { opacity: 0.45; }

.project-challenge-text {
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
  margin-top: 14px;
  margin-bottom: 8px;
}

.project-challenge-logos {
  display: flex;
  align-items: center;
  gap: 12px;
}

.project-challenge-logo {
  height: 48px;
  width: auto;
  display: block;
}

.project-year {
  font-size: 11.5px;
  color: var(--muted);
  padding-top: 7px;
  text-align: right;
}

/* --- ABOUT --- */

#about {
  padding: calc(65px + 100px) 48px 100px;
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 80px;
  align-items: start;
  max-width: 1200px;
}

.about-photo {
  width: 100%;
  height: auto;
  display: block;
}

.about-heading {
  font-family: var(--font-serif);
  font-size: clamp(26px, 3.2vw, 44px);
  font-weight: 400;
  line-height: 1.25;
}

.about-heading em {
  font-family: 'Times New Roman', Times, serif;
  font-style: normal;
  font-size: 16px;
  white-space: nowrap;
  color: var(--muted);
}

.about-content {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.about-text {
  font-size: 14.5px;
  line-height: 1.82;
  color: var(--muted);
  font-weight: 300;
}

.about-links {
  display: flex;
  gap: 24px;
  margin-top: 8px;
}

.about-links a {
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
  padding-bottom: 1px;
  transition: opacity 0.2s;
}

.about-links a:hover { opacity: 0.45; }

/* --- FOOTER --- */

footer {
  border-top: 1px solid var(--border);
  padding: 28px 48px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 11.5px;
  color: var(--muted);
  letter-spacing: 0.04em;
}

footer a {
  color: var(--muted);
  text-decoration: none;
  transition: color 0.2s;
}

footer a:hover { color: var(--text); }

/* --- RESPONSIVE --- */

@media (max-width: 780px) {
  header { padding: 18px 20px; }

  #hero {
    padding: 130px 24px 80px;
    min-height: auto;
  }

  .hero-tagline { font-size: 18px; }

  #work { padding: 60px 24px 40px; }

  .project-item { grid-template-columns: 44px 1fr; }
  .project-year { display: none; }

  .project-item--with-image { grid-template-columns: 44px 1fr; }
  .project-item--with-image .project-item-img,
  .project-item--with-image .project-body {
    grid-column: 1 / -1;
  }
  .project-item--with-image .project-item-img { margin-top: 12px; }
  .project-item--with-image .project-body { margin-top: 16px; }

  #about {
    grid-template-columns: 1fr;
    gap: 36px;
    padding: calc(65px + 40px) 24px 70px;
  }

  footer { padding: 22px 24px; }
}