:root {
  --bg: #f3f1f8;
  --surface: #ffffff;
  --text: #0f0c18;
  --muted: #45405a;
  --accent: #4a3880;
  --accent-soft: #ddd6ee;
  --link: #3d3168;
  --link-hover: #2a2050;
  --border: #c4bcd4;
  --tone-aerial: #4a3f72;
  --tone-hardware: #5a5078;
  --tone-industry: #52486c;
  --tone-learning: #6b5a9a;
  --tone-homelab: #7560a8;
  --tone-legged: #7d6ba8;
  --font: "Barlow", "Helvetica Neue", Arial, sans-serif;
  --nav-bg: rgba(243, 241, 248, 0.96);
  color-scheme: light;
}

[data-theme="dark"] {
  --bg: #0e0c14;
  --surface: #1a1724;
  --text: #f4f2fa;
  --muted: #b0a8c4;
  --accent: #b8a4e8;
  --accent-soft: #2e2840;
  --link: #c4b4e8;
  --link-hover: #e8dff8;
  --border: #3d3650;
  --tone-aerial: #8b7ec4;
  --tone-hardware: #9a90c0;
  --tone-industry: #9188b8;
  --tone-learning: #a894d4;
  --tone-homelab: #b0a0d8;
  --tone-legged: #b8a8dc;
  --nav-bg: rgba(14, 12, 20, 0.96);
  color-scheme: dark;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  font-size: 1rem;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
  transition: background 0.2s, color 0.2s;
}

a {
  color: var(--link);
  text-decoration: underline;
  text-underline-offset: 0.12em;
  transition: color 0.15s;
}

a:hover { color: var(--link-hover); }

ul { list-style: none; }

hr {
  border: 0;
  height: 1px;
  background: var(--border);
  margin: 3.5rem 0;
}

.page {
  max-width: 880px;
  margin: 0 auto;
  padding: 2rem 1.5rem 3.5rem;
}

/* ── Nav ── */
.nav-wrapper {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--nav-bg);
  border-bottom: 1px solid var(--border);
  box-shadow: inset 0 -2px 0 var(--accent-soft);
}

.top-nav {
  display: flex;
  align-items: center;
  gap: 1.75rem;
  max-width: 880px;
  margin: 0 auto;
  padding: 1rem 1.5rem;
  font-size: 0.875rem;
  font-weight: 500;
}

.top-nav a {
  color: var(--muted);
  text-decoration: none;
}

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

.top-nav a.active { color: var(--accent); }

.theme-toggle {
  margin-left: auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  border: none;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  padding: 0;
}

.theme-toggle:hover { color: var(--text); }

.theme-toggle .theme-icon { width: 18px; height: 18px; }

/* ── Hero ── */
.hero-card {
  display: flex;
  gap: 2rem;
  align-items: flex-start;
  padding: 1rem 0 0;
}

.hero-body {
  flex: 1;
  min-width: 0;
}

.hero-photo {
  flex-shrink: 0;
  margin-top: 0.25rem;
}

.hero-photo img {
  display: block;
  width: 200px;
  height: 200px;
  object-fit: cover;
  object-position: center 15%;
  border-radius: 6px;
  border: 1px solid var(--border);
}

.eyebrow {
  font-size: 0.8125rem;
  color: var(--muted);
  margin-bottom: 0.75rem;
}

.site-name {
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 1.25rem;
}

.lead { margin-bottom: 1rem; }

.lead + p {
  margin-bottom: 1rem;
  color: var(--muted);
}

.contact-panel { margin-top: 1.5rem; }

.link-row {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  font-size: 0.875rem;
}

.link-row a {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  text-decoration: none;
  color: var(--link);
}

.link-row a:hover { color: var(--link-hover); }

.link-icon { width: 15px; height: 15px; flex-shrink: 0; opacity: 0.7; }

/* ── Sections ── */
.section-kicker {
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
  margin-bottom: 0.35rem;
}

h2.section-title {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-bottom: 1.5rem;
}

.section-aside {
  font-size: 0.8125rem;
  font-weight: 400;
  color: var(--muted);
  margin-left: 0.35rem;
}

.projects-toolbar {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 0.65rem;
  margin: -0.75rem 0 1.25rem;
}

.projects-sort-label {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--muted);
}

.projects-sort-select {
  font: inherit;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.35rem 1.75rem 0.35rem 0.65rem;
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12' fill='none'%3E%3Cpath d='M3 4.5L6 7.5L9 4.5' stroke='%2345405a' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.55rem center;
}

.projects-sort-select:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

[data-theme="dark"] .projects-sort-select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12' fill='none'%3E%3Cpath d='M3 4.5L6 7.5L9 4.5' stroke='%23b0a8c4' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
}

/* ── Project cards ── */
.research-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.25rem;
}

a.research-card {
  display: flex;
  flex-direction: column;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  cursor: pointer;
  transition: border-color 0.2s, box-shadow 0.2s;
}

a.research-card:hover {
  border-color: var(--accent);
  box-shadow: 0 6px 20px rgba(74, 56, 128, 0.14);
}

[data-theme="dark"] a.research-card:hover {
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.35);
}

a.research-card:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.research-card.placeholder { opacity: 0.9; }

a.research-card--ongoing {
  box-shadow: inset 3px 0 0 var(--accent);
}

.research-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.25rem;
}

.research-meta .research-date {
  margin-bottom: 0;
}

.research-status {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  flex-shrink: 0;
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--accent);
  padding: 0.15rem 0.45rem;
  border: 1px solid color-mix(in srgb, var(--accent) 35%, var(--border));
  border-radius: 999px;
  background: color-mix(in srgb, var(--accent-soft) 65%, var(--surface));
}

.research-status .pulse-dot {
  margin-left: 0;
}

.research-media--pending {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  aspect-ratio: 16 / 10;
  background: var(--accent-soft);
}

.research-media--pending::after {
  display: none;
}

.research-media--pending .media-label {
  position: absolute;
  bottom: 0.75rem;
  left: 0.75rem;
  z-index: 1;
}

.media-loading {
  width: 2.25rem;
  height: 2.25rem;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.9s linear infinite;
}

.pulse-dot {
  display: inline-block;
  width: 0.45em;
  height: 0.45em;
  margin-left: 0.15em;
  border-radius: 50%;
  background: var(--accent);
  vertical-align: 0.05em;
  animation: pulse 1.8s ease-in-out infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.45; transform: scale(0.85); }
}

.research-media {
  position: relative;
  aspect-ratio: 16 / 10;
  margin: 0;
  padding: 0;
  overflow: hidden;
  background: var(--accent-soft);
}

.research-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.research-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(15, 12, 24, 0.72) 0%, transparent 55%);
  pointer-events: none;
}

.research-body { padding: 1rem 1.1rem 1.15rem; }

.media-label {
  position: absolute;
  z-index: 1;
  bottom: 0.75rem;
  left: 0.75rem;
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: #ffffff;
}

.research-date {
  font-size: 0.75rem;
  color: var(--accent);
  margin-bottom: 0.25rem;
}

.research-body h3 {
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.35;
  margin-bottom: 0.5rem;
}

.research-abstract {
  font-size: 0.9375rem;
  color: var(--muted);
  line-height: 1.6;
}

.research-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 0.75rem;
  font-size: 0.8125rem;
}

.research-links a {
  text-decoration: none;
  color: var(--link);
}

.research-cta {
  display: inline-block;
  margin-top: 0.75rem;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--accent);
}

/* ── Project detail pages ── */
.project-page { padding-top: 1.5rem; }

.project-back {
  display: inline-block;
  margin-bottom: 1.5rem;
  font-size: 0.875rem;
  font-weight: 500;
  text-decoration: none;
  color: var(--muted);
}

.project-back:hover { color: var(--accent); }

.project-kicker {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--accent);
  margin-bottom: 0.35rem;
}

.project-title {
  font-size: clamp(1.5rem, 4vw, 2rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: 0.35rem;
}

.project-date {
  font-size: 0.875rem;
  color: var(--muted);
  margin-bottom: 1.25rem;
}

.project-employer {
  margin-bottom: 1rem;
  padding: 0.85rem 1rem;
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: 6px;
  background: var(--surface);
  font-size: 0.875rem;
}

.project-employer-label {
  display: block;
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--accent);
  margin-bottom: 0.25rem;
}

.project-employer a {
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
}

.project-employer a:hover { color: var(--accent); }

.project-employer-role {
  display: block;
  margin-top: 0.2rem;
  color: var(--muted);
  font-size: 0.8125rem;
}

.project-featured {
  margin-bottom: 2rem;
}

.project-gallery-hero {
  margin: 0 0 1.25rem;
  border-radius: 6px;
  overflow: hidden;
  border: 1px solid var(--border);
  background: #0f0c18;
}

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

.project-gallery-hero figcaption,
.project-gallery-caption {
  padding: 0.75rem 0.9rem;
  font-size: 0.8125rem;
  line-height: 1.55;
  color: var(--muted);
  background: var(--surface);
  border-top: 1px solid var(--border);
  text-align: left;
}

.project-gallery-caption .project-gallery-label,
.project-gallery-hero .project-gallery-label {
  display: block;
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text);
  margin-bottom: 0.35rem;
}

.project-gallery-caption p,
.project-gallery-hero figcaption p {
  margin: 0;
}

.project-gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.85rem;
  margin-top: 1.25rem;
}

.project-gallery-grid figure {
  margin: 0;
  border-radius: 6px;
  overflow: hidden;
  border: 1px solid var(--border);
  background: #0f0c18;
}

.project-gallery-grid img {
  width: 100%;
  height: auto;
  display: block;
  aspect-ratio: 1;
  object-fit: contain;
}

.project-gallery-grid .project-gallery-caption {
  font-size: 0.75rem;
}

.project-gallery-grid .project-gallery-wide {
  grid-column: 1 / -1;
}

.project-gallery-grid--pair {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.project-gallery-grid .project-gallery-wide img {
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.project-paper {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  padding: 1.1rem 1.2rem;
  margin-bottom: 1.25rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--surface);
  text-decoration: none;
  color: inherit;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.project-paper:hover {
  border-color: var(--accent);
  box-shadow: 0 4px 16px rgba(74, 56, 128, 0.12);
}

.project-paper-label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--accent);
}

.project-paper-title {
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.35;
  color: var(--text);
}

.project-paper-action {
  margin-top: 0.35rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--link);
}

.project-paper:hover .project-paper-action { color: var(--link-hover); }

.project-video-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.25rem;
}

.project-video { margin: 0; }

.project-video .project-gallery-caption {
  margin-bottom: 0.85rem;
  padding: 0;
  background: transparent;
  border: none;
}

.project-video-frame {
  position: relative;
  aspect-ratio: 16 / 9;
  background: #0f0c18;
  border-radius: 6px;
  overflow: hidden;
  border: 1px solid var(--border);
}

.project-video-frame iframe,
.project-video-frame video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

.project-video-frame video,
.project-video-autoplay {
  object-fit: cover;
  background: #0f0c18;
}

.project-video-autoplay {
  pointer-events: none;
}

.project-video-frame--portrait {
  aspect-ratio: 478 / 850;
  max-width: min(100%, 22rem);
  margin-inline: auto;
}

.project-video-grid--single {
  grid-template-columns: 1fr;
  max-width: 24rem;
  margin-inline: auto;
}

.project-hero {
  margin: 0 0 2rem;
  border-radius: 6px;
  overflow: hidden;
  border: 1px solid var(--border);
  aspect-ratio: 16 / 9;
  background: var(--accent-soft);
}

.project-hero img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.project-content p {
  margin-bottom: 1rem;
  color: var(--muted);
  line-height: 1.65;
}

.project-content p:first-of-type {
  font-size: 1.0625rem;
  color: var(--text);
}

.project-highlights {
  margin: 1.5rem 0 2rem;
  padding: 0;
  list-style: none;
}

.project-highlights li {
  position: relative;
  padding: 0.45rem 0 0.45rem 1.1rem;
  font-size: 0.9375rem;
  color: var(--muted);
  border-bottom: 1px solid var(--border);
}

.project-highlights li:last-child { border-bottom: none; }

.project-highlights li::before {
  content: "·";
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 700;
}

.project-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  padding-top: 0.5rem;
  border-top: 1px solid var(--border);
}

.project-links a {
  font-size: 0.875rem;
  font-weight: 500;
  text-decoration: none;
}

.project-links a:hover { color: var(--link-hover); }

.project-meta {
  display: grid;
  gap: 0.35rem 1.5rem;
  margin-bottom: 1.5rem;
  font-size: 0.875rem;
  color: var(--muted);
}

.project-meta dt {
  font-weight: 600;
  color: var(--text);
  margin-top: 0.5rem;
}

.project-meta dt:first-child { margin-top: 0; }

.project-meta dd { margin: 0; }

.project-abstract,
.project-summary-banner {
  margin-bottom: 2rem;
  padding: 1.15rem 1.25rem;
  border-left: 3px solid var(--accent);
  background: var(--accent-soft);
  font-size: 0.9375rem;
  line-height: 1.65;
  color: var(--muted);
}

.project-summary-banner {
  margin-top: 0.25rem;
}

.project-summary-banner p {
  margin: 0 0 0.85rem;
}

.project-summary-banner p:last-child {
  margin-bottom: 0;
}

.project-summary-banner strong {
  color: var(--text);
  font-weight: 600;
}

.project-summary-banner a {
  color: var(--link);
  font-weight: 500;
}

.project-summary-banner a:hover {
  color: var(--link-hover);
}

[data-theme="dark"] .project-abstract,
[data-theme="dark"] .project-summary-banner {
  background: var(--accent-soft);
}

.project-section {
  margin-bottom: 2rem;
}

.project-section h2 {
  font-size: 1.0625rem;
  font-weight: 700;
  margin-bottom: 0.65rem;
  color: var(--text);
}

.project-section p {
  margin-bottom: 0.75rem;
  color: var(--muted);
  line-height: 1.65;
}

.project-awards {
  margin: 0 0 2rem;
  padding: 0;
  list-style: none;
}

.project-awards li {
  padding: 0.65rem 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.9375rem;
  color: var(--muted);
}

.project-awards li:last-child { border-bottom: none; }

.project-awards strong { color: var(--text); }

.project-pending-banner {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 2rem;
  padding: 1.1rem 1.2rem;
  border: 1px dashed var(--accent);
  border-radius: 6px;
  background: var(--accent-soft);
  font-size: 0.9375rem;
  color: var(--muted);
}

.project-pending-banner strong { color: var(--text); }

.project-pending-banner .media-loading {
  flex-shrink: 0;
}

/* ── Experience ── */
.exp-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
}

.exp-column-title {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding-bottom: 0.5rem;
  margin-bottom: 1rem;
  border-bottom: 1px solid var(--border);
  color: var(--text);
}

.exp-column-count {
  font-weight: 400;
  color: var(--muted);
  text-transform: none;
}

.exp-stack { display: flex; flex-direction: column; gap: 0; }

.exp-card {
  padding: 1.1rem 0;
  border-bottom: 1px solid var(--border);
}

.exp-card:last-child { border-bottom: none; }

.exp-card.current {
  padding-left: 0.75rem;
  border-left: 2px solid var(--accent);
}

.exp-card.current .exp-card-role { color: var(--text); }

.exp-card-head {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.5rem 1rem;
  align-items: start;
}

.exp-card-logo { display: none; }

.exp-card-role {
  font-weight: 600;
  font-size: 0.9375rem;
  line-height: 1.35;
}

.exp-card-org {
  font-size: 0.875rem;
  color: var(--muted);
  margin-top: 0.15rem;
}

.exp-card-date {
  font-size: 0.75rem;
  color: var(--muted);
  white-space: nowrap;
  text-align: right;
}

.exp-card-body {
  margin: 0.5rem 0 0;
  padding: 0;
  font-size: 0.875rem;
  color: var(--muted);
  line-height: 1.55;
}

.exp-card-body li::before { content: "· "; }

.exp-card-body li + li { margin-top: 0.2rem; }

.languages-note {
  margin-top: 2rem;
  font-size: 0.8125rem;
  color: var(--muted);
}

/* ── Awards ── */
.awards-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.awards-list li {
  padding: 1.1rem 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.9375rem;
  color: var(--muted);
  line-height: 1.6;
}

.awards-list li:last-child { border-bottom: none; }

.awards-list strong { color: var(--text); font-weight: 600; }

.awards-list a {
  margin-left: 0.25rem;
  font-size: 0.875rem;
}

/* ── Footer ── */
.site-footer {
  padding: 0.5rem 0;
  font-size: 0.8125rem;
  color: var(--muted);
}

/* ── Responsive ── */
@media (max-width: 760px) {
  .research-list { grid-template-columns: 1fr; }
}

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

@media (prefers-reduced-motion: reduce) {
  .media-loading { animation: none; }
  .pulse-dot { animation: none; }
}

@media (max-width: 640px) {
  .hero-card {
    flex-direction: column;
    align-items: stretch;
  }

  .hero-photo img {
    width: 100%;
    max-width: 280px;
    height: auto;
    aspect-ratio: 1;
    margin: 0 auto;
  }

  .project-video-grid { grid-template-columns: 1fr; }
  .exp-grid { grid-template-columns: 1fr; gap: 2rem; }
  .exp-card-head { grid-template-columns: 1fr; }
  .exp-card-date { text-align: left; margin-top: 0.15rem; }
}