/* === DESIGN TOKENS === */
:root {
  --bg: #FAFAF7;
  --ink: #111111;
  --ink-muted: #666666;
  --accent: #7C3AED;
  --rule: #E2E2DC;
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'Menlo', 'Courier New', monospace;
  --max-w: 1200px;
  --pad-x: clamp(1.5rem, 5vw, 3rem);
}

/* === BASE RESET === */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: inherit;
  text-decoration: none;
}

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

/* === LAYOUT === */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--pad-x);
}

/* === NAV === */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg);
  border-bottom: 1px solid var(--rule);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
}

.nav-logo {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--ink);
}

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--ink-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  transition: color 0.15s;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--ink);
}

/* === HERO === */
#hero {
  padding: 6rem 0 2rem;
}

.hero-top {
  display: grid;
  grid-template-columns: 1fr clamp(110px, 28vw, 360px);
  gap: clamp(1.25rem, 4vw, 4rem);
  align-items: center;
}

.hero-portrait {
  aspect-ratio: 4 / 5;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #EEEEEA;
  border: 1px solid var(--rule);
  border-left: 3px solid var(--accent);
}

.hero-portrait span {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--ink-muted);
}

.hero-portrait img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.hero-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 1.5rem;
}

.hero-tagline .accent {
  color: var(--accent);
  font-weight: 600;
}

.hero-name {
  font-size: clamp(2.5rem, 8vw, 8rem);
  font-weight: 600;
  line-height: 0.95;
  letter-spacing: -0.04em;
  margin-bottom: 2rem;
}

.hero-tagline {
  font-size: clamp(0.95rem, 1.4vw, 1.1rem);
  color: var(--ink-muted);
  max-width: 560px;
  line-height: 1.6;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--rule);
  margin-top: 3rem;
}

.hero-stat {
  padding: 1.5rem 1rem;
  border-right: 1px solid var(--rule);
  text-align: center;
}

.hero-stat:last-child {
  border-right: none;
}

.hero-stat-num {
  display: block;
  font-size: 1.75rem;
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1;
  margin-bottom: 0.35rem;
}

.hero-stat-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.63rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-muted);
}

/* === SECTION HEADER === */
.section-head {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  border-top: 1px solid var(--rule);
  padding-top: 1.5rem;
  margin-bottom: 2.5rem;
}

.section-num {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--ink-muted);
}

.section-label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-weight: 500;
}

/* === WORK GRID === */
#work {
  padding: 5rem 0;
}

.work-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
}

/* === CARDS === */
.card {
  background: var(--bg);
  position: relative;
  transition: background 0.15s;
  text-decoration: none;
  color: var(--ink);
  display: flex;
  flex-direction: column;
}

.card--wide {
  grid-column: span 2;
}

.card--clickable {
  cursor: pointer;
}

.card--clickable:hover {
  background: #F3F3EE;
}

.card--clickable:hover .card-title {
  text-decoration: underline;
  text-underline-offset: 4px;
  text-decoration-thickness: 1px;
}

.card--external {
  border-left: 2px solid var(--accent);
}

/* Card body */
.card-body {
  padding: 2.5rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}

/* Card with split image layout (SAR Robot wide card) */
.card--has-image {
  display: grid;
  grid-template-columns: 1fr 1fr;
  flex-direction: unset;
}

.card-media {
  overflow: hidden;
  min-height: 280px;
}

.card-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.card--clickable:hover .card-media img {
  transform: scale(1.03);
}

/* Card content elements */
.card-tag {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.63rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--ink-muted);
  margin-bottom: 0.8rem;
}

.card-title {
  font-size: 1.2rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin-bottom: 0.5rem;
}

.card--wide .card-title {
  font-size: 1.7rem;
}

.card-meta {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--ink-muted);
  margin-bottom: 1rem;
  line-height: 1.5;
}

/* Card thumbnail strip (standard cards) */
.card-thumb {
  overflow: hidden;
  height: 180px;
  flex-shrink: 0;
}

.card-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  transition: transform 0.5s ease;
}

.card--clickable:hover .card-thumb img {
  transform: scale(1.04);
}

/* Card bullets */
.card-bullets {
  list-style: none;
  padding: 0;
  margin-top: auto;
}

.card-bullets li {
  font-size: 0.84rem;
  color: var(--ink-muted);
  line-height: 1.6;
  padding-left: 1rem;
  position: relative;
  margin-bottom: 0.25rem;
}

.card-bullets li::before {
  content: '—';
  position: absolute;
  left: 0;
  color: var(--ink-muted);
  font-size: 0.75rem;
}

.card-desc {
  font-size: 0.875rem;
  color: var(--ink-muted);
  line-height: 1.7;
  margin-top: auto;
}

/* === WORK LIST (clean list layout, large thumbnails) === */
.work-list {
  list-style: none;
  padding: 0;
  border-top: 1px solid var(--rule);
}

.work-item {
  border-bottom: 1px solid var(--rule);
  transition: background 0.15s;
}

.work-item a,
.work-item .work-static {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 2.5rem;
  padding: 2rem 0;
  align-items: center;
  color: var(--ink);
}

.work-item:hover {
  background: #F3F3EE;
}

.work-item:hover .card-title {
  text-decoration: underline;
  text-underline-offset: 4px;
  text-decoration-thickness: 1px;
}

/* Static (non-clickable) item — no hover affordances */
.work-item--static:hover {
  background: transparent;
}

.work-item--static:hover .card-title {
  text-decoration: none;
}

.work-note {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.04em;
  color: var(--ink-muted);
  margin-top: 0.85rem;
}

.work-thumb {
  overflow: hidden;
  aspect-ratio: 4 / 3;
  background: var(--rule);
}

.work-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  filter: grayscale(15%);
  transition: transform 0.5s ease, filter 0.2s;
}

.work-item:hover .work-thumb img {
  transform: scale(1.03);
  filter: grayscale(0%);
}

/* Logo tile — show the full logo, centered on white */
.work-thumb--logo {
  background: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
}

.work-thumb--logo img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: 2rem;
}

.work-item--static:hover .work-thumb img {
  transform: none;
}

/* Branded placeholder tile for projects without a repo image */
.work-thumb--placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--ink);
  border-left: 2px solid var(--accent);
}

.work-thumb--placeholder span {
  font-family: var(--font-mono);
  font-size: 1.4rem;
  letter-spacing: 0.04em;
  color: var(--bg);
}

.work-content {
  display: flex;
  flex-direction: column;
}

.work-content .card-bullets {
  margin-top: 0.75rem;
}

/* === ABOUT === */
#about {
  padding: 5rem 0;
  border-top: 1px solid var(--rule);
}

.about-grid {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 5rem;
  align-items: start;
}

.about-photo img {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  object-position: center top;
  filter: grayscale(10%);
}

.about-bio {
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--ink-muted);
  margin-bottom: 2.5rem;
}

.about-bio p + p {
  margin-top: 1rem;
}

.bio-toggle {
  background: none;
  border: none;
  padding: 0;
  margin-top: 1.25rem;
  display: block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent);
  cursor: pointer;
  letter-spacing: 0.02em;
}

.bio-toggle:hover {
  text-decoration: underline;
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  margin-bottom: 2.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--rule);
}

.skill-group h4 {
  font-family: var(--font-mono);
  font-size: 0.63rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--ink);
  margin-bottom: 0.75rem;
}

.skill-group ul {
  list-style: none;
  font-size: 0.8rem;
  line-height: 1.9;
  color: var(--ink-muted);
}

.btn-outline {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  border: 1px solid var(--ink);
  padding: 0.65rem 1.4rem;
  color: var(--ink);
  transition: background 0.15s, color 0.15s;
}

.btn-outline:hover {
  background: var(--ink);
  color: var(--bg);
}

.btn-outline .dl-arrow {
  color: var(--accent);
}

/* === CONTACT === */
#contact {
  padding: 5rem 0;
  border-top: 1px solid var(--rule);
}

.contact-links {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.contact-link {
  font-size: clamp(1.2rem, 3vw, 1.75rem);
  font-weight: 500;
  letter-spacing: -0.02em;
  color: var(--ink-muted);
  transition: color 0.15s;
  display: inline-block;
}

.contact-link:hover {
  color: var(--ink);
}

/* === FOOTER === */
footer {
  border-top: 1px solid var(--rule);
  padding: 2rem 0;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-archive {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-muted);
  transition: color 0.15s;
}

.footer-archive:hover {
  color: var(--ink);
}

.footer-copy {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--ink-muted);
}

/* ============================================================
   PROJECT PAGES
   ============================================================ */

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

.project-nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
}

.back-link {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--ink-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  transition: color 0.15s;
}

.back-link:hover {
  color: var(--ink);
}

/* Project header */
.project-header {
  padding: 5rem 0 3rem;
  border-bottom: 1px solid var(--rule);
}

.project-tag {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--ink-muted);
  margin-bottom: 1.5rem;
}

.project-title {
  font-size: clamp(2.5rem, 6vw, 5rem);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.0;
  margin-bottom: 1.25rem;
}

.project-oneliner {
  font-size: 1.05rem;
  color: var(--ink-muted);
  max-width: 640px;
  line-height: 1.6;
  margin-bottom: 2rem;
}

.project-meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
}

.project-meta-item {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.project-meta-item .meta-label {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--ink-muted);
  opacity: 0.7;
}

.project-meta-item .meta-value {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--ink-muted);
}

.project-hero-img {
  margin-top: 3rem;
  background: #EEEEEA;
  display: flex;
  align-items: center;
  justify-content: center;
}

.project-hero-img img {
  width: 100%;
  max-height: 500px;
  object-fit: contain;
  object-position: center;
  display: block;
}

/* Project body */
.project-body {
  padding: 4rem 0;
}

.project-section {
  max-width: 720px;
  margin: 0 auto 4rem;
}

.project-section-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.63rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--ink-muted);
  border-top: 1px solid var(--rule);
  padding-top: 1rem;
  margin-bottom: 1.25rem;
}

.project-section h2 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 1rem;
  letter-spacing: -0.01em;
}

.project-section p {
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--ink-muted);
}

.project-section p + p {
  margin-top: 0.75rem;
}

.project-section strong {
  color: var(--ink);
  font-weight: 600;
}

.project-section ul,
.project-section ol {
  padding-left: 1.4rem;
  margin: 0.75rem 0;
}

.project-section li {
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--ink-muted);
  margin-bottom: 0.3rem;
}

/* Inline mono formula */
.formula {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  background: #EEEEEA;
  padding: 0.2rem 0.5rem;
  display: inline-block;
  margin: 0.25rem 0;
}

/* Outcome stats box */
.outcome-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(110px, 1fr));
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
  margin: 1.5rem 0;
}

.stat {
  background: var(--bg);
  padding: 1.5rem 1.25rem;
}

.stat-value {
  font-size: 1.9rem;
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1;
  margin-bottom: 0.35rem;
}

.stat-label {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-muted);
}

/* Image / video grids */
.img-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
  margin: 2rem 0;
}

.img-grid--3 {
  grid-template-columns: repeat(3, 1fr);
}

.img-grid--1 {
  grid-template-columns: 1fr;
}

.img-item {
  background: #EEEEEA;
  overflow: hidden;
}

.img-item img {
  width: 100%;
  height: 260px;
  object-fit: contain;
  object-position: center;
  display: block;
}

.img-item video {
  width: 100%;
  display: block;
}

.img-item figcaption {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  color: var(--ink-muted);
  padding: 0.5rem 0.75rem;
  border-top: 1px solid var(--rule);
  line-height: 1.4;
}

/* Tables */
.project-section table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.25rem 0;
  font-size: 0.875rem;
}

.project-section th {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  text-align: left;
  padding: 0.6rem 1rem;
  border-bottom: 1px solid var(--ink);
  color: var(--ink-muted);
  font-weight: 500;
}

.project-section td {
  padding: 0.6rem 1rem;
  border-bottom: 1px solid var(--rule);
  color: var(--ink-muted);
  line-height: 1.5;
}

.project-section tr:last-child td {
  border-bottom: none;
}

/* Download button */
.download-btn {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  border: 1px solid var(--ink);
  padding: 0.65rem 1.4rem;
  color: var(--ink);
  transition: background 0.15s, color 0.15s;
  margin-top: 1rem;
}

.download-btn:hover {
  background: var(--ink);
  color: var(--bg);
}

/* Project footer nav */
.project-footer-nav {
  border-top: 1px solid var(--rule);
  padding: 2.5rem 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.project-nav-link {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-muted);
  transition: color 0.15s;
}

.project-nav-link:hover {
  color: var(--ink);
}

/* ============================================================
   ARCHIVE PAGE
   ============================================================ */

.archive-intro {
  padding: 4rem 0 3rem;
  border-bottom: 1px solid var(--rule);
}

.archive-intro h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 600;
  letter-spacing: -0.03em;
  margin-bottom: 1rem;
}

.archive-intro p {
  font-size: 0.9375rem;
  color: var(--ink-muted);
  max-width: 480px;
  line-height: 1.65;
}

.archive-list {
  list-style: none;
  padding: 0;
}

.archive-item {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 2rem;
  padding: 2rem 0;
  border-bottom: 1px solid var(--rule);
  align-items: start;
  transition: background 0.15s;
}

.archive-item a {
  display: contents;
}

.archive-thumb {
  overflow: hidden;
  aspect-ratio: 1;
  background: var(--rule);
}

.archive-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(20%);
  transition: filter 0.2s;
}

.archive-item:hover .archive-thumb img {
  filter: grayscale(0%);
}

.archive-content {
  display: flex;
  flex-direction: column;
}

.archive-year {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.63rem;
  color: var(--ink-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.3rem;
}

.archive-title {
  font-size: 1rem;
  font-weight: 500;
  margin-bottom: 0.4rem;
  letter-spacing: -0.01em;
  transition: text-decoration-color 0.15s;
}

.archive-item:hover .archive-title {
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

.archive-desc {
  font-size: 0.84rem;
  color: var(--ink-muted);
  line-height: 1.65;
}

/* ============================================================
   RESPONSIVE
   ============================================================ */

@media (max-width: 900px) {
  .work-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .card--wide {
    grid-column: span 2;
  }

  .card--has-image {
    grid-template-columns: 1fr;
  }

  .card-media {
    min-height: 220px;
  }

  .work-item a,
  .work-item .work-static {
    grid-template-columns: 240px 1fr;
    gap: 1.75rem;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .about-photo {
    max-width: 220px;
  }

  .skills-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .img-grid--3 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .work-grid {
    grid-template-columns: 1fr;
  }

  .work-item a,
  .work-item .work-static {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }

  .work-thumb {
    aspect-ratio: 16 / 9;
  }

  .card--wide {
    grid-column: span 1;
  }

  .card--has-image {
    grid-template-columns: 1fr;
  }

  .nav-links {
    gap: 1.2rem;
  }

  .nav-links a {
    font-size: 0.65rem;
  }

  .skills-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .contact-link {
    font-size: 1rem;
  }

  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
  }

  .hero-stat:nth-child(2) {
    border-right: none;
  }

  .hero-stat:nth-child(1),
  .hero-stat:nth-child(2) {
    border-bottom: 1px solid var(--rule);
  }

  .img-grid {
    grid-template-columns: 1fr;
  }

  .img-grid--3 {
    grid-template-columns: 1fr;
  }

  .outcome-stats {
    grid-template-columns: repeat(2, 1fr);
  }

  .project-footer-nav {
    flex-direction: column;
    gap: 1rem;
    align-items: flex-start;
  }

  .archive-item {
    grid-template-columns: 60px 1fr;
    gap: 1rem;
  }

  .project-meta-row {
    gap: 1.25rem;
  }
}