/* Owned by the "layout" workstream (openspec tasks 2.1-2.8).

   Design system (chosen here since design.md left specifics open):
   - Typography: system font stack (no web-font request -> fast, and reads
     as "simple" rather than styled).
   - Color: neutral off-white surface, near-black text, a single blue
     accent used sparingly for links/interactive affordances. Light theme
     is primary; a dark variant follows prefers-color-scheme automatically.
   - Spacing: an 8px-based scale via custom properties.
   - Motion: short (150-260ms) ease transitions only; respects
     prefers-reduced-motion.
*/

:root {
  --color-bg: #faf9f6;
  --color-surface: #ffffff;
  --color-border: #e5e2da;
  --color-text: #1c1d1f;
  --color-text-muted: #5b5e63;
  --color-accent: #2f5fd1;
  --color-accent-dark: #21449e;
  --color-accent-soft: #ecf1fc;
  --color-badge-bg: #fff3e0;
  --color-badge-text: #8a5a00;

  --color-status-live: #1f8a4c;
  --color-status-live-soft: rgba(31, 138, 76, 0.18);
  --color-status-stable: #2f5fd1;
  --color-status-wip: #c07a00;

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;

  --radius-sm: 6px;
  --radius-md: 12px;

  --shadow-sm: 0 1px 2px rgba(20, 20, 20, 0.05), 0 1px 1px rgba(20, 20, 20, 0.03);
  --shadow-md: 0 6px 20px rgba(20, 20, 20, 0.08);

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --space-8: 4.5rem;

  --content-width: 780px;
  --max-width: 1140px;

  --transition-fast: 150ms ease;
  --transition-base: 240ms ease;

  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #111214;
    --color-surface: #1a1b1e;
    --color-border: #2c2e33;
    --color-text: #eef0f2;
    --color-text-muted: #a5a9b0;
    --color-accent: #86a3ff;
    --color-accent-dark: #b7c6ff;
    --color-accent-soft: #1c2438;
    --color-badge-bg: #3a2c12;
    --color-badge-text: #e6b866;
    --color-status-live: #4ad080;
    --color-status-live-soft: rgba(74, 208, 128, 0.22);
    --color-status-stable: #86a3ff;
    --color-status-wip: #e6b866;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 6px 22px rgba(0, 0, 0, 0.5);
    color-scheme: dark;
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

/* ---- Base ------------------------------------------------------------ */

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

a {
  color: var(--color-accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

h1, h2, h3 {
  line-height: 1.2;
  margin: 0;
}

p {
  margin: 0;
}

.section-inner {
  max-width: var(--content-width);
  margin: 0 auto;
  padding-inline: clamp(1.25rem, 4vw, 2rem);
}

.section-heading {
  font-size: 1.5rem;
  margin-bottom: var(--space-4);
}

main > section {
  padding-block: var(--space-7);
}

main > section + section {
  border-top: 1px solid var(--color-border);
}

.noscript-notice {
  max-width: var(--content-width);
  margin: var(--space-5) auto;
  padding: var(--space-4) clamp(1.25rem, 4vw, 2rem);
  text-align: center;
  color: var(--color-text-muted);
}

/* ---- Hero -------------------------------------------------------------- */

.hero {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-7) clamp(1.25rem, 4vw, 2.5rem);
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.hero-text {
  max-width: 640px;
}

.eyebrow {
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-2);
}

.hero-name {
  font-size: clamp(2rem, 5vw, 2.75rem);
  font-weight: 700;
  letter-spacing: -0.01em;
}

.hero-title {
  margin-top: var(--space-2);
  font-size: 1.15rem;
  color: var(--color-text-muted);
  font-weight: 500;
}

.hero-oneliner {
  margin-top: var(--space-4);
  font-size: 1.05rem;
  max-width: 56ch;
}

#es-demo-container {
  width: 100%;
  min-height: 280px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

@media (min-width: 800px) {
  .hero {
    flex-direction: row;
    align-items: center;
    gap: var(--space-7);
  }

  .hero-text {
    flex: 1 1 45%;
  }

  #es-demo-container {
    flex: 1 1 50%;
    min-height: 360px;
  }
}

/* ---- Bridge ------------------------------------------------------------ */

.bridge {
  background: var(--color-surface);
}

.bridge-inner {
  max-width: var(--content-width);
  margin: 0 auto;
  padding-inline: clamp(1.25rem, 4vw, 2rem);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-4);
}

.bridge-aside {
  flex: none;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
}

.contact-links {
  display: flex;
  gap: var(--space-4);
}

.contact-link {
  display: inline-flex;
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}

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

.contact-link svg {
  width: 26px;
  height: 26px;
}

.bridge-photo {
  flex: none;
  width: 132px;
  height: 132px;
  border-radius: 50%;
  box-shadow: 0 0 0 4px var(--color-bg), 0 0 0 7px var(--color-accent), var(--shadow-md);
  object-fit: cover;
  object-position: 50% 50%;
}

@media (min-width: 800px) {
  .bridge-inner {
    flex-direction: row;
    align-items: center;
    gap: var(--space-6);
  }

  .bridge-photo {
    width: 168px;
    height: 168px;
  }
}

.bridge-statement {
  font-size: 1.2rem;
  font-weight: 500;
  max-width: 60ch;
}

.bridge-statement--placeholder {
  color: var(--color-text-muted);
  font-style: italic;
  font-weight: 400;
}

.bridge-supporting {
  margin-top: var(--space-3);
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.bridge-supporting a {
  font-size: 0.85rem;
}

.bridge-supporting-note {
  color: var(--color-text-muted);
}

/* ---- Projects (visual priority section) -------------------------------- */

/* Deck geometry, shared by the tiles, the deck, and the pointer that links the
   open tile to the detail panel. */
.projects {
  --tile-h: 336px;
  --deck-top: 8px;    /* room above the tiles */
  --deck-slack: 28px; /* room below them, for shadow and the pointer */
  --caret-h: 14px;    /* how far the pointer reaches down from the tile's bottom edge */
  padding-block: var(--space-8);
}

/* Narrow tiles wrap "View live" / "View repo" onto two rows; the extra height
   keeps the second link from being clipped by the tile's fixed size. */
@media (max-width: 480px) {
  .projects {
    --tile-h: 372px;
  }
}

.projects .section-inner {
  max-width: var(--max-width);
}

.projects .section-heading {
  font-size: 1.85rem;
  margin-bottom: var(--space-6);
}

.projects-empty {
  padding-block: var(--space-7);
  text-align: center;
  color: var(--color-text-muted);
  font-style: italic;
}

/* ---- Project deck ----------------------------------------------------- */

/* Tiles are absolutely positioned and moved by script.js, so the deck's height
   is fixed: tile height plus the room above and below. The wrapper sits above
   the detail panel so the pointer paints over the panel's top border. */
.project-deck-wrap {
  position: relative;
  z-index: 2;
}

.project-deck {
  position: relative;
  height: calc(var(--deck-top) + var(--tile-h) + var(--deck-slack));
  overflow: hidden;
  touch-action: pan-y;
  cursor: grab;
  border-radius: var(--radius-md);
}

/* Keyboard focus lands on the deck as a whole (arrow keys move through it), but
   a ring around the deck's box would run into the detail panel, so it marks the
   front tile instead, offset clear of the active ring. */
.project-deck:focus-visible {
  outline: none;
}

.project-deck:focus-visible .project-tile--front {
  outline: 2px solid var(--color-accent);
  outline-offset: 4px;
}

.project-deck.is-dragging {
  cursor: grabbing;
  user-select: none;
  -webkit-user-select: none;
}

/* Fixed, uniform tile height regardless of selection state: the active
   marker below is an overlay ring, never border-width or padding, so it never
   changes layout. */
.project-tile {
  position: absolute;
  top: var(--deck-top);
  left: 50%;
  display: flex;
  flex-direction: column;
  width: var(--tile-w, 360px);
  height: var(--tile-h);
  margin-left: calc(var(--tile-w, 360px) / -2);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  transition: transform 450ms cubic-bezier(0.2, 0.8, 0.2, 1),
    opacity var(--transition-base),
    translate var(--transition-fast),
    box-shadow var(--transition-base);
}

.project-deck--settling .project-tile {
  transition: none;
}

.project-tile--front {
  box-shadow: var(--shadow-md);
}

.project-tile--far {
  opacity: 0;
  pointer-events: none;
}

.project-tile--left {
  --dir: -1;
}

.project-tile--right {
  --dir: 1;
}

.project-tile--side:hover {
  translate: calc(var(--dir) * 10px) 0;
}

.project-tile--placeholder {
  border-style: dashed;
}

.project-tile-content {
  flex: 1 1 auto;
  min-height: 0;
  display: flex;
  flex-direction: column;
  transition: opacity 200ms ease;
}

/* Behind the front tile only the strip (veil + peek) shows, not the content. */
.project-tile--side .project-tile-content {
  opacity: 0;
}

.project-tile-veil {
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: var(--color-bg);
  opacity: var(--veil, 0);
  pointer-events: none;
  transition: opacity var(--transition-base);
}

/* The strip that peeks out from behind the front tile: status dot, name reading
   top to bottom, then tech icons pinned to the bottom. */
.project-peek {
  position: absolute;
  top: 0;
  bottom: 0;
  width: var(--peek-width, 44px);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.6rem;
  padding: 0.85rem 0;
  background: transparent;
  border: none;
  font: inherit;
  color: var(--color-text);
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-base);
}

.project-tile--side .project-peek {
  opacity: 1;
  pointer-events: auto;
}

.project-tile--right .project-peek {
  right: 0;
}

.project-tile--left .project-peek {
  left: 0;
}

.project-peek-name {
  flex: none;
  writing-mode: vertical-rl;
  font-size: calc(1.05rem * var(--peek-scale, 1));
  font-weight: 700;
  white-space: nowrap;
  transition: color var(--transition-fast);
}

.project-peek-icons {
  margin-top: auto;
  min-height: 0;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}

.project-peek-icons .tech-icon {
  width: var(--peek-icon-size, 15px);
  height: var(--peek-icon-size, 15px);
}

.project-peek:hover .project-peek-name,
.project-peek:hover .project-peek-icons {
  color: var(--color-accent);
}

/* Page-edge lines, like the edge of a book's pages: lit at whichever end still
   has tiles beyond the layers that are drawn. */
.project-deck-edge {
  position: absolute;
  top: var(--deck-top);
  height: var(--tile-h);
  width: var(--edge-gutter, 28px);
  display: flex;
  align-items: center;
  gap: 3px;
  pointer-events: none;
  z-index: 1;
}

.project-deck-edge--left {
  left: 0;
  flex-direction: row-reverse;
  padding-right: 4px;
}

.project-deck-edge--right {
  right: 0;
  padding-left: 4px;
}

.project-deck-edge i {
  flex: none;
  width: 2px;
  height: calc(var(--edge-height, 260px) * (1 - var(--line) * 0.07));
  border-radius: 1px;
  background: var(--color-text-muted);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.project-deck-edge i.is-lit {
  opacity: calc(0.75 - var(--line) * 0.1);
}

/* ---- Deck navigation --------------------------------------------------- */

.project-deck-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
}

.project-deck-nav {
  display: grid;
  place-items: center;
  width: 2.25rem;
  height: 2.25rem;
  padding: 0 0 0.15rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 50%;
  font: inherit;
  font-size: 1.3rem;
  line-height: 1;
  color: var(--color-text);
  cursor: pointer;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

.project-deck-nav:hover:not(:disabled) {
  color: var(--color-accent);
  border-color: var(--color-accent);
}

.project-deck-nav:disabled {
  opacity: 0.35;
  cursor: default;
}

.project-deck-position {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  min-width: 0;
}

.project-deck-dot {
  width: 10px;
  height: 10px;
  padding: 0;
  background: var(--color-border);
  border: none;
  border-radius: 50%;
  cursor: pointer;
  transition: width var(--transition-base), background-color var(--transition-fast);
}

.project-deck-dot:hover {
  background: var(--color-text-muted);
}

.project-deck-dot.is-on {
  width: 24px;
  border-radius: 5px;
  background: var(--color-accent);
}

.project-deck-scrub {
  width: min(280px, 50vw);
  accent-color: var(--color-accent);
}

.project-deck-count {
  flex-basis: 100%;
  text-align: center;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  font-variant-numeric: tabular-nums;
}

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

/* ---- Pointer from the open tile to the detail panel -------------------- */

/* Zero-height overlay whose top edge is the front tile's bottom edge. The
   caret's 17px box is drawn to match --caret-h and the panel's 2px border. */
.project-connector {
  position: absolute;
  left: 0;
  right: 0;
  top: calc(var(--deck-top) + var(--tile-h));
  height: 0;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-fast);
}

.project-deck-wrap.is-linked .project-connector {
  opacity: 1;
}

.project-connector-caret {
  position: absolute;
  left: 50%;
  top: 0;
  margin-left: -16px;
}

.project-connector-fill {
  fill: var(--color-accent-soft);
}

.project-connector-line {
  fill: none;
  stroke: var(--color-accent);
  stroke-width: 2;
  stroke-linejoin: round;
  stroke-linecap: round;
}

.project-tile-body {
  flex: 1 1 auto;
  min-height: 0;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-5);
}

.project-tile-header {
  flex: none;
  display: flex;
  align-items: center;
}

/* Title and tagline get a deterministic height matching their line-clamp
   (line-height * clamped lines) and flex-shrink: 0, so the flex column
   never squeezes them shorter than that — which previously cut the
   clamped text off mid-line instead of at a clean line boundary. */
.project-title {
  flex: none;
  font-size: 1.15rem;
  line-height: 1.3;
  height: calc(1.3em * 2);
  overflow: hidden;
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
}

.project-tagline {
  flex: none;
  font-size: 0.92rem;
  color: var(--color-text-muted);
  line-height: 1.4;
  height: calc(1.4em * 2);
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
  overflow: hidden;
}

.project-line {
  font-size: 0.92rem;
  color: var(--color-text-muted);
}

.project-label {
  display: block;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-text);
  margin-bottom: 0.15rem;
}

/* One row of links ("View live", "View repo"). Pinned to the bottom of the
   tile's flex column; wraps rather than overflows on narrow tiles. */
.project-links {
  flex: none;
  margin-top: auto;
  padding-top: var(--space-3);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1) var(--space-4);
}

.project-link {
  font-weight: 600;
  font-size: 0.92rem;
}

.project-link--disabled {
  color: var(--color-text-muted);
  cursor: default;
}

/* ---- Project status indicator (distinct per value, not text alone) --- */

/* One .project-status per status a project holds ("Stable · Live"). Stacked
   variant is the dots-only column on a peek strip. */
.project-statuses {
  flex: none;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  white-space: nowrap;
}

.project-statuses--stack {
  flex-direction: column;
  gap: 0.35rem;
}

.project-status-sep {
  color: var(--color-text-muted);
  font-size: 0.7rem;
  font-weight: 700;
}

.project-status {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.project-status-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  flex: none;
}

.project-status--live .project-status-dot {
  background: var(--color-status-live);
  box-shadow: 0 0 0 3px var(--color-status-live-soft);
}

.project-status--live {
  color: var(--color-status-live);
}

.project-status--stable .project-status-dot {
  background: var(--color-status-stable);
}

.project-status--stable {
  color: var(--color-status-stable);
}

.project-status--wip .project-status-dot {
  background: transparent;
  border: 2px solid var(--color-status-wip);
}

.project-status--wip {
  color: var(--color-status-wip);
}

.project-status--placeholder .project-status-dot {
  background: transparent;
  border: 2px dashed var(--color-text-muted);
}

/* ---- Details strip (bottom of tile) ----------------------------------- */

.project-details-toggle {
  flex: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  background: transparent;
  border: none;
  border-top: 1px solid var(--color-border);
  padding: var(--space-3) var(--space-5);
  font: inherit;
  font-weight: 600;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  cursor: pointer;
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

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

.project-details-toggle .accordion-chevron {
  font-size: 1.1rem;
}

.project-details-toggle[aria-expanded="true"] .accordion-chevron {
  transform: rotate(180deg);
}

/* An overlay rather than an inset box-shadow: a box-shadow paints beneath the
   tile's content, so the Details strip's background would cover the ring. */
.project-tile--active::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  box-shadow: inset 0 0 0 2px var(--color-accent);
  pointer-events: none;
}

.project-tile--active .project-details-toggle {
  background: var(--color-accent-soft);
  color: var(--color-accent-dark);
  font-weight: 700;
}

/* ---- Shared detail panel ------------------------------------------------ */

.project-detail-panel {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows var(--transition-base), margin-top var(--transition-base);
}

/* Open, the panel tucks up into the deck's bottom slack so its top edge sits
   --caret-h below the tile: exactly where the pointer's base lands. */
.project-detail-panel.is-open {
  grid-template-rows: 1fr;
  margin-top: calc(var(--caret-h) - var(--deck-slack));
}

.project-detail-panel-inner {
  overflow: hidden;
  min-height: 0;
}

.project-detail-panel.is-open .project-detail-panel-inner {
  background: var(--color-surface);
  border: 2px solid var(--color-accent);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  padding: var(--space-5);
}

/* Tinted band across the panel's top, in the same accent as the pointer. */
.project-detail-header {
  display: flex;
  flex-wrap: wrap; /* a long title drops below the status labels on narrow screens */
  align-items: center;
  gap: var(--space-2) var(--space-3);
  margin: calc(-1 * var(--space-5)) calc(-1 * var(--space-5)) var(--space-3);
  padding: var(--space-3) var(--space-5);
  background: var(--color-accent-soft);
}

.project-detail-title {
  font-size: 1.3rem;
}

.project-tech-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  list-style: none;
  margin: var(--space-3) 0 0;
  padding: 0;
}

/* Compact chip row on the tile: icon-only, so it sits tight under the tagline. */
.project-tech-list--tile {
  flex: none;
  margin: var(--space-1) 0 0;
  gap: var(--space-1);
}

/* Icon chips and text chips share one fixed height so mixed rows stay on a
   single baseline. Rounded rectangle (not a pill) so a bare glyph still reads
   as a delimited container. */
.project-tech-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  height: 1.5rem;
  background: var(--color-accent-soft);
  color: var(--color-accent-dark);
  font-size: 0.78rem;
  font-weight: 600;
  line-height: 1;
  padding: 0 0.6rem;
  border-radius: var(--radius-sm);
}

/* Monochrome via currentColor: brand hexes fail 3:1 in one theme or the
   other for six of the ten icons (see add-tech-stack-icons design.md). */
.project-tech-tag--icon {
  padding: 0 0.5rem;
}

.project-tech-tag--icon-only {
  position: relative;
  padding: 0 0.4rem;
}

/* Mouse-over tooltip for icon-only chips: reveals the existing visually-hidden
   label above the chip, so there is one source of text (no title attribute,
   no duplicate announcement) and chips stay out of the tab order. */
.project-tech-tag--icon-only:hover .visually-hidden {
  bottom: calc(100% + 6px);
  left: 50%;
  width: auto;
  height: auto;
  margin: 0;
  padding: 0.2rem 0.4rem;
  overflow: visible;
  clip: auto;
  transform: translateX(-50%);
  background: var(--color-text);
  color: var(--color-bg);
  font-size: 0.72rem;
  font-weight: 600;
  line-height: 1.2;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-md);
  pointer-events: none;
  z-index: 2;
}

.tech-icon {
  flex: none;
  width: 1.15rem;
  height: 1.15rem;
  fill: currentColor;
}

/* Clip-rect pattern, not display: none, so the text stays in the a11y tree. */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ---- Accordion sections (Teaching / Publications / Thesis) ------------- */

.accordion-section {
  padding-block: var(--space-5);
}

.accordion-section .accordion-heading,
.accordion-section .accordion-summary,
.accordion-section .accordion-panel {
  max-width: var(--content-width);
  margin-inline: auto;
  padding-inline: clamp(1.25rem, 4vw, 2rem);
}

.accordion-heading {
  font-size: 1rem;
}

.accordion-header {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  background: transparent;
  border: none;
  padding: var(--space-2) 0;
  font: inherit;
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--color-text);
  cursor: pointer;
  text-align: left;
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast);
}

.accordion-header:hover {
  color: var(--color-accent);
}

.accordion-chevron {
  flex: none;
  display: inline-block;
  font-size: 1.1rem;
  color: var(--color-text-muted);
  transition: transform var(--transition-base);
}

.accordion-header[aria-expanded="true"] .accordion-chevron {
  transform: rotate(180deg);
}

.accordion-summary {
  margin-top: var(--space-1);
  font-size: 0.92rem;
  color: var(--color-text-muted);
  max-width: 62ch;
}

.accordion-panel {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows var(--transition-base);
}

.accordion-panel.is-open {
  grid-template-rows: 1fr;
}

.accordion-panel-inner {
  overflow: hidden;
  min-height: 0;
}

.accordion-panel.is-open .accordion-panel-inner {
  padding-top: var(--space-4);
}

.accordion-detail-text {
  font-size: 0.95rem;
  color: var(--color-text-muted);
}

.publications-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.publications-item {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--space-2);
  font-size: 0.92rem;
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--color-border);
}

.publications-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.pub-year {
  font-weight: 700;
  color: var(--color-accent);
  flex: none;
}

.pub-title {
  font-weight: 600;
  color: var(--color-text);
}

a.pub-title:hover {
  color: var(--color-accent);
}

.pub-venue {
  color: var(--color-text-muted);
  font-size: 0.85rem;
}

/* Teaching list. Mobile-first: each entry stacks as
     year   term
     code   title
     institution
   Every field is pinned to an explicit grid cell so a missing field leaves a
   gap instead of pulling its neighbours into the wrong column. */
.teaching-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.teaching-item {
  display: grid;
  /* Floor on the first column keeps titles at one x across rows even though
     course codes differ slightly in width. */
  grid-template-columns: minmax(5.5rem, auto) minmax(0, 1fr);
  column-gap: var(--space-2);
  row-gap: var(--space-1);
  align-items: baseline;
  font-size: 0.92rem;
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--color-border);
}

.teaching-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.teaching-year {
  grid-column: 1;
  grid-row: 1;
  font-weight: 700;
  color: var(--color-accent);
}

.teaching-term {
  grid-column: 2;
  grid-row: 1;
  color: var(--color-text-muted);
}

.teaching-code {
  grid-column: 1;
  grid-row: 2;
  color: var(--color-text-muted);
  font-size: 0.85rem;
  white-space: nowrap;
}

.teaching-title {
  grid-column: 2;
  grid-row: 2;
  font-weight: 600;
  color: var(--color-text);
}

.teaching-institution {
  grid-column: 1 / -1;
  grid-row: 3;
  color: var(--color-text-muted);
  font-size: 0.85rem;
}

/* Wide: one row per course, columns aligned across rows via subgrid (so
   long institution names don't need hard-coded widths). A year that repeats
   the row above is hidden visually but stays in the a11y tree. */
@media (min-width: 800px) {
  .teaching-list {
    display: grid;
    grid-template-columns: auto auto auto minmax(0, 1fr) auto;
    column-gap: var(--space-4);
    row-gap: var(--space-3);
  }

  .teaching-item {
    grid-template-columns: subgrid;
    grid-column: 1 / -1;
    column-gap: inherit;
  }

  .teaching-year,
  .teaching-term,
  .teaching-code,
  .teaching-title,
  .teaching-institution {
    grid-row: 1;
  }

  .teaching-year { grid-column: 1; }
  .teaching-term { grid-column: 2; }
  .teaching-code { grid-column: 3; }
  .teaching-title { grid-column: 4; }
  .teaching-institution {
    grid-column: 5;
    text-align: right;
  }

  .teaching-year--repeat {
    position: absolute;
    width: 1px;
    height: 1px;
    margin: -1px;
    padding: 0;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
  }
}

.thesis-title {
  font-weight: 600;
  color: var(--color-text);
}

.thesis-link,
.pub-title {
  transition: color var(--transition-fast);
}

.thesis-link--disabled {
  color: var(--color-text-muted);
}

/* ---- Skills -------------------------------------------------------------- */

.skills-empty {
  color: var(--color-text-muted);
  font-style: italic;
}

.skills-groups {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.skills-group-name {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-2);
}

.skills-tags {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.skills-tag {
  background: var(--color-accent-soft);
  color: var(--color-accent-dark);
  font-size: 0.85rem;
  padding: 0.3rem 0.7rem;
  border-radius: 999px;
}