/* ==========================================================================
   components.css — Component-level styles.
   ========================================================================== */

/* ---------- Header / Navigation ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: var(--space-md) 0;
  border-bottom: 1px solid transparent;
  transition: background var(--transition-base), border-color var(--transition-base),
    padding var(--transition-base);
}

.site-header.is-scrolled {
  background: color-mix(in srgb, var(--color-background) 82%, transparent);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom-color: var(--color-border-soft);
  padding: var(--space-sm) 0;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
}

.logo {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.logo span {
  color: var(--color-accent);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 34px;
  list-style: none;
}

.nav-links a {
  font-size: 13.5px;
  color: var(--color-text-secondary);
  font-weight: 500;
  transition: color var(--transition-fast);
}

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

.nav-right {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.nav-cta {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 10px 18px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  transition: border-color var(--transition-fast), background var(--transition-fast);
}

.nav-cta:hover {
  border-color: var(--color-accent);
  background: var(--color-accent-soft);
}

/* Theme toggle */
.theme-toggle {
  width: 38px;
  height: 38px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color var(--transition-fast), background var(--transition-fast);
}

.theme-toggle:hover {
  border-color: var(--color-accent);
  background: var(--color-accent-soft);
}

.theme-toggle svg {
  width: 16px;
  height: 16px;
  stroke: var(--color-text-primary);
}

.theme-toggle .icon-moon { display: none; }
[data-theme='dark'] .theme-toggle .icon-sun { display: none; }
[data-theme='dark'] .theme-toggle .icon-moon { display: block; }

.mobile-toggle {
  display: none;
  border: 1px solid var(--color-border);
  padding: 8px 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  border-radius: var(--radius);
}

.mobile-menu {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 99;
  background: var(--color-background);
  padding: calc(var(--header-height) + var(--space-lg)) var(--space-lg) var(--space-lg);
  flex-direction: column;
  gap: var(--space-md);
}

.mobile-menu.is-open {
  display: flex;
}

.mobile-menu a {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 600;
  color: var(--color-text-primary);
}

/* ---------- Buttons ---------- */
.btn {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 14px 26px;
  border-radius: var(--radius);
  transition: all var(--transition-base);
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
}

.btn-primary {
  background: var(--color-accent);
  color: #05060a;
  font-weight: 600;
}

.btn-primary:hover {
  background: var(--color-accent-strong);
  transform: translateY(-1px);
  box-shadow: var(--glow-accent);
}

.btn-secondary {
  border: 1px solid var(--color-border);
  color: var(--color-text-primary);
}

.btn-secondary:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.btn--disabled {
  opacity: 0.55;
  cursor: default;
  pointer-events: none;
}

.btn--disabled:hover {
  border-color: var(--color-border);
  color: var(--color-text-primary);
}

/* ---------- Hero ---------- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: calc(var(--header-height) + var(--space-xl)) 0 var(--space-2xl);
  border-top: none;
  scroll-margin-top: var(--header-height);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 0.9fr;
  gap: var(--space-lg);
  align-items: center;
  width: 100%;
}

.hero-text .eyebrow {
  margin-bottom: var(--space-md);
}

.headline {
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  font-weight: 700;
  line-height: 1.1;
  max-width: 15ch;
}

.headline .accent {
  color: var(--color-accent);
}

.hero-desc {
  margin-top: var(--space-md);
  color: var(--color-text-secondary);
  font-size: 16.5px;
  max-width: 46ch;
}

.hero-id {
  display: flex;
  gap: var(--space-lg);
  margin-top: var(--space-lg);
  padding-top: var(--space-md);
  border-top: 1px solid var(--color-border-soft);
}

.hero-id dt {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text-tertiary);
  margin-bottom: 4px;
}

.hero-id dd {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-accent);
}

.hero-meta-label {
  font-family: var(--font-mono) !important;
  font-size: 10.5px;
  letter-spacing: 0.1em;
  color: var(--color-text-tertiary) !important;
  border: none !important;
  padding: 7px 0 !important;
}

.hero-actions {
  display: flex;
  gap: var(--space-sm);
  margin-top: var(--space-lg);
  flex-wrap: wrap;
}

.hero-meta {
  display: flex;
  gap: var(--space-sm);
  margin-top: var(--space-xl);
  flex-wrap: wrap;
}

.hero-meta span {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.1em;
  color: var(--color-text-tertiary);
  border: 1px solid var(--color-border-soft);
  padding: 7px 12px;
  border-radius: var(--radius);
}

.hero-visual {
  position: relative;
  aspect-ratio: 1 / 1;
  display: flex;
  align-items: center;
  justify-content: center;
}

#hero-canvas {
  width: 100%;
  height: 100%;
  display: block;
}

.hero-visual-fallback {
  display: none;
  width: 100%;
  height: 100%;
}

.hero-visual-fallback svg {
  width: 100%;
  height: 100%;
}

/* ---------- Engineering Focus ---------- */
.focus-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--color-border-soft);
  border: 1px solid var(--color-border-soft);
}

.focus-card {
  background: var(--color-background);
  padding: var(--space-lg) var(--space-md);
  transition: background var(--transition-base);
}

.focus-card:hover {
  background: var(--color-surface);
}

.focus-icon {
  width: 34px;
  height: 34px;
  margin-bottom: var(--space-md);
}

.focus-icon path,
.focus-icon rect,
.focus-icon circle,
.focus-icon ellipse {
  stroke: var(--color-accent);
}

.focus-card h3 {
  font-size: 16.5px;
  margin-bottom: var(--space-xs);
}

.focus-card p {
  color: var(--color-text-secondary);
  font-size: 14px;
  margin-bottom: var(--space-sm);
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.tag {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.05em;
  color: var(--color-text-tertiary);
  border: 1px solid var(--color-border);
  padding: 4px 8px;
  border-radius: var(--radius);
}

/* ---------- Selected Work ---------- */
.work-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-md);
}

.work-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-lg);
  background: var(--color-surface);
  transition: border-color var(--transition-base), transform var(--transition-base);
}

.work-card:hover {
  border-color: var(--color-accent-dim);
  transform: translateY(-3px);
}

.work-media {
  border: 1px solid var(--color-border-soft);
  border-radius: var(--radius);
  margin-bottom: var(--space-md);
  overflow: hidden;
}

.work-media img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.work-media--placeholder {
  aspect-ratio: 16 / 9;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  background: var(--color-surface-elevated);
  color: var(--color-text-tertiary);
}

.work-media--placeholder .diagram-svg {
  width: 60%;
  color: var(--color-text-tertiary);
}

.work-media--placeholder span {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.work-link--disabled {
  color: var(--color-text-tertiary);
  cursor: default;
  pointer-events: none;
}

.work-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: var(--space-md);
  gap: var(--space-xs);
}

.work-id {
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: var(--color-text-tertiary);
  letter-spacing: 0.08em;
}

.status-pill {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 4px 9px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--color-accent-dim);
  color: var(--color-accent);
  white-space: nowrap;
}

.work-card h3 {
  font-size: 19px;
  margin-bottom: var(--space-xs);
}

.work-card p {
  color: var(--color-text-secondary);
  font-size: 14.5px;
  margin-bottom: var(--space-sm);
}

.work-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: var(--space-md);
}

.work-link {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 4px;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

.work-link:hover {
  color: var(--color-accent);
  border-color: var(--color-accent);
}

/* ---------- Gallery ---------- */
.gallery-filters {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  margin-bottom: var(--space-lg);
}

.filter-btn {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 9px 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
}

.filter-btn:hover {
  color: var(--color-text-primary);
  border-color: var(--color-accent-dim);
}

.filter-btn.is-active {
  color: #05060a;
  background: var(--color-accent);
  border-color: var(--color-accent);
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-auto-rows: 200px;
  gap: var(--space-sm);
}

.gallery-item {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  cursor: pointer;
  grid-column: span 1;
  grid-row: span 1;
  transition: transform var(--transition-base), border-color var(--transition-base);
}

.gallery-item:hover {
  border-color: var(--color-accent-dim);
}

.gallery-item.is-hidden {
  display: none;
}

.gallery-item--featured {
  grid-column: span 2;
  grid-row: span 2;
}

.gallery-diagram {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-tertiary);
  background: linear-gradient(135deg, var(--color-surface) 0%, var(--color-surface-elevated) 100%);
  transition: color var(--transition-base);
}

.gallery-item:hover .gallery-diagram {
  color: var(--color-accent);
}

.diagram-svg {
  width: 62%;
  height: 62%;
  max-width: 160px;
}

.gallery-item--featured .diagram-svg {
  width: 46%;
  max-width: 220px;
}

.gallery-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.gallery-empty {
  grid-column: 1 / -1;
  padding: var(--space-2xl) 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px dashed var(--color-border);
  border-radius: var(--radius);
}

.gallery-empty span {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.12em;
  color: var(--color-text-tertiary);
}

.gallery-caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: var(--space-sm) var(--space-md);
  background: linear-gradient(to top, rgba(0, 0, 0, 0.7), transparent);
  opacity: 0;
  transform: translateY(6px);
  transition: opacity var(--transition-fast), transform var(--transition-fast);
}

.gallery-item:hover .gallery-caption {
  opacity: 1;
  transform: none;
}

.gallery-caption .cap-title {
  font-family: var(--font-mono);
  font-size: 12px;
  color: #fff;
}

.gallery-caption .cap-cat {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--color-accent-strong);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* Lightbox */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: none;
  align-items: center;
  justify-content: center;
  background: rgba(5, 6, 10, 0.92);
  padding: var(--space-lg);
}

.lightbox.is-open {
  display: flex;
}

.lightbox-inner {
  max-width: 900px;
  width: 100%;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
}

.lightbox-image {
  width: 100%;
  aspect-ratio: 16 / 10;
  background: linear-gradient(135deg, var(--color-surface-elevated), var(--color-surface));
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
  overflow: hidden;
}

.lightbox-image .diagram-svg {
  width: 42%;
  max-width: 280px;
}

.lightbox-image .gallery-image {
  object-fit: cover;
}

.lightbox-body {
  padding: var(--space-md) var(--space-lg);
}

.lightbox-body .cap-cat {
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.lightbox-body h3 {
  font-size: 20px;
  margin: var(--space-xs) 0;
}

.lightbox-body p {
  color: var(--color-text-secondary);
  font-size: 14.5px;
}

.lightbox-year {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--color-text-tertiary);
  margin-top: var(--space-xs);
  display: block;
}

.lightbox-controls {
  position: absolute;
  top: var(--space-lg);
  right: var(--space-lg);
  display: flex;
  gap: var(--space-xs);
}

.lightbox-nav {
  position: fixed;
  top: 50%;
  transform: translateY(-50%);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  display: flex;
  align-items: center;
  justify-content: center;
}

.lightbox-nav.prev {
  left: var(--space-lg);
}

.lightbox-nav.next {
  right: var(--space-lg);
}

.lightbox-close {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-primary);
  font-size: 16px;
}

/* ---------- Labs ---------- */
.labs-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: var(--space-md);
  flex-wrap: wrap;
  margin-bottom: var(--space-xl);
}

.labs-status {
  display: flex;
  gap: var(--space-lg);
  flex-wrap: wrap;
}

.labs-status .stat .label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  color: var(--color-text-tertiary);
  text-transform: uppercase;
  margin-bottom: 6px;
}

.labs-status .stat .val {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--color-accent);
}

.lab-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--color-border);
  border: 1px solid var(--color-border);
}

.lab-card {
  background: var(--color-surface-elevated);
  padding: var(--space-md);
  min-height: 170px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: background var(--transition-base);
}

.lab-card:hover {
  background: var(--color-surface-hover);
}

.lab-id {
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: var(--color-text-tertiary);
  letter-spacing: 0.08em;
}

.lab-card h4 {
  font-size: 15.5px;
  margin-top: var(--space-sm);
}

.lab-tag {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--color-accent);
  letter-spacing: 0.08em;
  margin-top: var(--space-sm);
}

.labs-canvas-wrap {
  margin-top: var(--space-xl);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  height: 220px;
}

#labs-canvas {
  width: 100%;
  height: 100%;
  display: block;
}

/* ---------- Philosophy ---------- */
.phil-list {
  border-top: 1px solid var(--color-border-soft);
}

.phil-item {
  display: grid;
  grid-template-columns: 60px 1fr;
  gap: var(--space-md);
  padding: var(--space-md) 0;
  border-bottom: 1px solid var(--color-border-soft);
  align-items: baseline;
}

.phil-num {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-accent-dim);
}

.phil-item h3 {
  font-size: 17px;
  margin-bottom: var(--space-2xs);
}

.phil-item p {
  color: var(--color-text-secondary);
  font-size: 14.5px;
  max-width: 60ch;
}

/* ---------- About ---------- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2xl);
  align-items: start;
}

.about-copy p {
  color: var(--color-text-secondary);
  font-size: 15.5px;
  margin-bottom: var(--space-sm);
}

.about-copy p strong {
  color: var(--color-text-primary);
  font-weight: 600;
}

.about-side {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.about-visual {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-md);
  color: var(--color-accent-dim);
  background: var(--color-surface);
}

.info-list {
  border-top: 1px solid var(--color-border-soft);
}

.info-row {
  display: flex;
  justify-content: space-between;
  padding: var(--space-sm) 0;
  border-bottom: 1px solid var(--color-border-soft);
  font-family: var(--font-mono);
  font-size: 12.5px;
  gap: var(--space-sm);
}

.info-row .k {
  color: var(--color-text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.info-row .v {
  color: var(--color-text-primary);
  text-align: right;
}

/* ---------- Technology ---------- */
.stack-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

.stack-col .label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--color-accent);
  text-transform: uppercase;
  margin-bottom: var(--space-sm);
}

.stack-divider {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: 0 0 var(--space-md);
}

.stack-items {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
}

.stack-chip {
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--color-text-primary);
  border: 1px solid var(--color-border);
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius);
  transition: border-color var(--transition-fast);
}

.stack-chip:hover {
  border-color: var(--color-accent-dim);
}

/* ---------- Contact ---------- */
.contact-inner {
  text-align: center;
  max-width: 640px;
  margin: 0 auto;
}

.contact-inner .eyebrow {
  justify-content: center;
}

.contact-inner h2 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  margin: var(--space-md) 0;
}

.contact-inner p {
  color: var(--color-text-secondary);
  font-size: 16px;
  margin-bottom: var(--space-lg);
}

.contact-actions {
  display: flex;
  justify-content: center;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--color-border-soft);
  padding: var(--space-xl) 0;
}

.footer-grid {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-md);
}

.footer-brand {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 15px;
  margin-bottom: 6px;
}

.footer-sub {
  color: var(--color-text-tertiary);
  font-size: 12.5px;
  font-family: var(--font-mono);
}

.footer-sub--accent {
  color: var(--color-accent);
  margin-top: 6px;
}

.footer-links {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
}

.footer-links a {
  font-size: 13px;
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--color-accent);
}

.footer-link--disabled {
  font-size: 13px;
  color: var(--color-text-tertiary);
  cursor: default;
}

.footer-bottom {
  margin-top: var(--space-lg);
  padding-top: var(--space-md);
  border-top: 1px solid var(--color-border-soft);
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--color-text-tertiary);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-xs);
}