/* ---- Header / nav ---- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--c-bg);
}

.site-header .container {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-1) var(--sp-3);
  padding-block: var(--sp-2);
}

.site-nav {
  flex-wrap: wrap;
}

@media (max-width: 480px) {
  .site-nav {
    gap: var(--sp-2);
  }
}

.site-header .site-title {
  font-family: var(--f-label);
  font-weight: 400;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: var(--fs-sm);
  color: var(--c-text);
  text-decoration: none;
}

.site-nav {
  display: flex;
  gap: var(--sp-3);
}

.site-nav a {
  font-family: var(--f-label);
  font-weight: 400;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: var(--fs-xs);
  color: var(--c-text-muted);
  text-decoration: none;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: var(--c-accent);
}

/* ---- Footer ---- */
.site-footer {
  position: relative;
  background: var(--c-bg);
  padding-block: var(--sp-4);
}

/* Divider limited to the content column */
.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: min(100%, var(--container));
  height: 1px;
  background: var(--c-border);
}

.site-footer .container {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-2);
}

.site-footer a {
  color: var(--c-text-muted);
  text-decoration: none;
}

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

.site-footer .footer-links {
  display: flex;
  gap: var(--sp-3);
  list-style: none;
  padding: 0;
}

/* ---- Cards ---- */
/* Darker muted text inside boxes for contrast (see tokens.css) */
.card,
.panel,
.placeholder-block {
  --c-text-muted: var(--c-text-muted-on-surface);
  transition: border-color 200ms ease;
}

.card:hover,
.panel:hover,
.placeholder-block:hover {
  border-color: var(--c-accent-hover);
}

.card {
  background: rgb(var(--c-surface-rgb) / 0.65);
  border: 1px solid var(--c-accent);
  padding: var(--sp-3);
}

.card h3 {
  color: var(--c-text);
  margin-bottom: var(--sp-1);
}

.card p {
  color: var(--c-text-muted);
  margin-bottom: var(--sp-2);
}

/* ---- Panel: same box as .card, without .card's muted paragraphs ---- */
.panel {
  background: rgb(var(--c-surface-rgb) / 0.65);
  border: 1px solid var(--c-accent);
  padding: var(--sp-3);
}

.panel p {
  max-width: none;
  margin-bottom: var(--sp-1);
}

.panel p:last-child {
  margin-bottom: 0;
}

/* ---- Panel title ---- */
.panel-title {
  font-family: var(--f-body);
  font-size: var(--fs-lg);
  font-weight: 700;
  padding-bottom: var(--sp-2);
  margin-bottom: var(--sp-2);
  border-bottom: 1px solid var(--c-divider-on-surface);
}

.hero-writings-group .writings-list {
  margin-top: 0;
}

.hero-writings-group .writings-list a {
  font-size: var(--fs-base);
}

/* ---- Writings list ---- */
.writings-list {
  list-style: none;
  padding: 0;
  margin-top: var(--sp-3);
  display: flex;
  flex-direction: column;
}

/* Grid so long titles don't push the date onto its own line */
.writings-list li {
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-areas:
    "eyebrow time"
    "title   title";
  align-items: baseline;
  column-gap: var(--sp-2);
  row-gap: 0.25em;
  padding-block: var(--sp-2);
}

/* The panel title already draws the first divider */
.writings-list li + li {
  border-top: 1px solid var(--c-divider-on-surface);
}

.writings-list li > div {
  display: contents;
}

.writings-list li > div .eyebrow {
  grid-area: eyebrow;
}

.writings-list li > div a {
  grid-area: title;
}

.writings-list li time {
  grid-area: time;
  justify-self: end;
}

.writings-list a {
  font-family: var(--f-body);
  font-size: var(--fs-lg);
}

/* ---- Coursework definition list ---- */
.coursework {
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: var(--sp-1) var(--sp-3);
  margin-top: var(--sp-3);
}

.coursework dt {
  font-family: var(--f-label);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: var(--fs-xs);
  color: var(--c-text);
  padding-block: var(--sp-1);
  border-top: 1px solid var(--c-border);
}

.coursework dd {
  margin: 0;
  padding-block: var(--sp-1);
  border-top: 1px solid var(--c-border);
  color: var(--c-text-muted);
}

@media (max-width: 480px) {
  .coursework {
    grid-template-columns: 1fr;
  }

  .coursework dd {
    border-top: none;
    padding-top: 0;
  }
}

/* ---- Placeholder image blocks ---- */
.placeholder-block {
  background: rgb(var(--c-surface-rgb) / 0.65);
  border: 1px dashed var(--c-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--sp-2);
  color: var(--c-text-muted);
  font-family: var(--f-label);
  font-size: var(--fs-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* ---- Photo blocks: sized to the photo's own aspect ratio ---- */
.photo-block {
  border: 2px solid var(--c-accent);
}

.photo-block picture,
.photo-block img {
  display: block;
  width: 100%;
  height: auto;
}

.photo-caption {
  text-align: center;
  margin-top: var(--sp-1);
}

.gallery-item {
  margin: 0;
}

.gallery-item .photo-block {
  aspect-ratio: 1 / 1;
  overflow: hidden;
}

.gallery-grid.is-short .photo-block {
  aspect-ratio: 4 / 3;
}

.gallery-item .photo-block picture,
.gallery-item .photo-block img {
  height: 100%;
  object-fit: cover;
}

.gallery-item figcaption {
  margin-top: var(--sp-1);
}

.gallery-note {
  font-size: var(--fs-sm);
  color: var(--c-text-muted);
  margin-top: 0.25em;
}

/* ---- Carousel ---- */
.carousel-title {
  margin-bottom: var(--sp-2);
}

.carousel-viewport {
  position: relative;
}

.carousel-track {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: 80%;
  column-gap: var(--sp-2);
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scrollbar-width: none;
  cursor: grab;
}

.carousel-track::-webkit-scrollbar {
  display: none;
}

.carousel-track.is-dragging {
  cursor: grabbing;
  scroll-snap-type: none;
  user-select: none;
}

.carousel-track.is-dragging .carousel-card {
  pointer-events: none;
}

@media (min-width: 768px) {
  .carousel-track {
    grid-auto-columns: calc((100% - 2 * var(--sp-3)) / 3);
    column-gap: var(--sp-3);
  }
}

.carousel-item {
  scroll-snap-align: start;
}

.carousel-card {
  position: relative;
  display: block;
  aspect-ratio: 1 / 1;
  overflow: hidden;
  border: 2px solid var(--c-accent);
  background: var(--c-surface);
  color: var(--c-bg);
  text-decoration: none;
}

.carousel-card picture,
.carousel-card .carousel-img {
  position: absolute;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  -webkit-user-drag: none;
  transition: transform 400ms ease;
}

.carousel-overlay {
  position: absolute;
  inset: auto 0 0 0;
  padding: var(--sp-4) var(--sp-2) var(--sp-2);
  background: linear-gradient(to top, rgb(58 50 42 / 0.92) 0%, rgb(58 50 42 / 0.75) 55%, rgb(58 50 42 / 0) 100%);
  transition: padding-bottom 300ms ease;
}

.carousel-overlay h4 {
  font-family: var(--f-display);
  font-size: var(--fs-lg);
  color: var(--c-bg);
  margin-bottom: 0.25em;
}

.carousel-overlay p {
  max-width: none;
  font-size: var(--fs-sm);
  line-height: 1.4;
  color: rgb(244 239 229 / 0.85);
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
  overflow: hidden;
}

.carousel-tag {
  display: inline-block;
  margin-bottom: var(--sp-1);
  padding: 0.15em 0.6em;
  font-family: var(--f-label);
  font-size: var(--fs-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--c-text);
  background: var(--c-bg);
}

.carousel-card.is-link:hover,
.carousel-card.is-link:focus-visible {
  border-color: var(--c-accent-hover);
}

.carousel-card.is-link:hover .carousel-img,
.carousel-card.is-link:focus-visible .carousel-img {
  transform: scale(1.05);
}

.carousel-card.is-link:hover .carousel-overlay,
.carousel-card.is-link:focus-visible .carousel-overlay {
  padding-bottom: var(--sp-3);
}

.carousel-btn {
  position: absolute;
  top: 50%;
  z-index: 2;
  width: 2.5rem;
  height: 2.5rem;
  transform: translateY(-50%);
  font-family: var(--f-display);
  font-size: var(--fs-xl);
  line-height: 1;
  color: var(--c-accent);
  background: var(--c-bg);
  border: 1px solid var(--c-accent);
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transition: opacity 200ms ease;
}

.carousel-btn.is-prev {
  left: calc(-1 * var(--sp-2));
}

.carousel-btn.is-next {
  right: calc(-1 * var(--sp-2));
}

.carousel.is-scrollable .carousel-viewport:hover .carousel-btn:not(:disabled),
.carousel.is-scrollable .carousel-btn:focus-visible {
  opacity: 1;
  pointer-events: auto;
}

.carousel-btn:hover {
  color: var(--c-bg);
  background: var(--c-accent);
}

/* Touch screens swipe instead */
@media (hover: none) {
  .carousel-btn {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .carousel-card .carousel-img,
  .carousel-overlay,
  .carousel-btn {
    transition: none;
  }

  .carousel-card.is-link:hover .carousel-img,
  .carousel-card.is-link:focus-visible .carousel-img {
    transform: none;
  }
}

/* ---- Scroll reveal ---- */
.reveal {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 400ms ease, transform 400ms ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* ---- Site-wide checkerboard (signature element) ---- */
.site-checkerboard {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  /* Own layer, so panel switches don't flash the background */
  will-change: transform;
  background-image: conic-gradient(
    from 90deg,
    rgb(var(--cb-tone-a-rgb) / var(--cb-opacity)) 90deg,
    transparent 90deg 180deg,
    rgb(var(--cb-tone-a-rgb) / var(--cb-opacity)) 180deg 270deg,
    transparent 270deg
  );
  background-size: var(--cb-tile) var(--cb-tile);
  animation: checkerboard-drift 6s linear infinite;
}

@keyframes checkerboard-drift {
  from {
    background-position: 0 0;
  }
  to {
    background-position: var(--cb-tile) var(--cb-tile);
  }
}

@media (prefers-reduced-motion: reduce) {
  .site-checkerboard {
    animation: none;
  }
}

@media (max-width: 768px) {
  .site-checkerboard {
    --cb-tile: 40px;
  }
}

.site-footer .copyright {
  font-family: var(--f-label);
  font-weight: 400;
  font-size: var(--fs-xs);
  color: var(--c-text-muted);
}