/*
  Direction: a technical drawing sheet.
  - Cool white sheet, black linework, the blue of the PLA prints as the one colour.
  - Red is reserved for leader lines: every caption points at its photo the same way
    the annotations drawn on the photos do.
  - Project facts are set as a drawing title block.
*/

:root {
  --sheet: #f3f5f6;
  --sheet-alt: #e6e9ec;
  --paper: #ffffff;
  --ink: #15181c;
  --muted: #535a64;
  --line: #c6ccd3;
  --blue: #0f55c6;
  --blue-deep: #0b3f96;
  --leader: #d8261c;
  --radius: 3px;
  --wrap: 1120px;
  --header: 64px;
  --sans: "IBM Plex Sans", system-ui, sans-serif;
  --narrow: "IBM Plex Sans Condensed", "Arial Narrow", system-ui, sans-serif;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  margin: 0;
  padding-top: var(--header);
  font-family: var(--sans);
  font-size: 1.0625rem;
  color: var(--ink);
  background: var(--sheet);
  line-height: 1.6;
}

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

a {
  color: inherit;
}

h1,
h2,
h3 {
  font-family: var(--narrow);
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.08;
  margin: 0 0 0.5em;
}

p {
  margin: 0 0 1em;
}

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

.wrap {
  width: min(var(--wrap), calc(100% - 40px));
  margin-inline: auto;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

.top-anchor {
  position: absolute;
  top: 0;
  left: 0;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.skip-link {
  position: absolute;
  left: 16px;
  top: -48px;
  background: var(--ink);
  color: var(--paper);
  padding: 8px 12px;
  z-index: 80;
}

.skip-link:focus {
  top: 12px;
}

.lead {
  font-size: 1.2rem;
  line-height: 1.5;
  color: var(--muted);
  max-width: 38rem;
}

/* ---------- Buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 20px;
  border-radius: var(--radius);
  text-decoration: none;
  font-weight: 500;
  font-size: 1rem;
  border: 1.5px solid var(--ink);
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.btn-primary {
  background: var(--blue);
  border-color: var(--blue);
  color: var(--paper);
}

.btn-primary:hover {
  background: var(--blue-deep);
  border-color: var(--blue-deep);
}

.btn-primary:active {
  background: var(--ink);
  border-color: var(--ink);
}

.btn-ghost {
  background: transparent;
}

.btn-ghost:hover {
  background: var(--ink);
  color: var(--paper);
}

/* ---------- Header ---------- */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 40;
  height: var(--header);
  background: var(--sheet);
  border-bottom: 1px solid transparent;
  transform: translate3d(0, 0, 0);
  transition: transform 0.3s ease, border-color 0.2s ease;
}

.site-header.is-scrolled {
  border-bottom-color: var(--ink);
}

.site-header.is-hidden {
  transform: translate3d(0, -100%, 0);
  pointer-events: none;
}

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

.header-inner {
  height: var(--header);
  display: flex;
  align-items: center;
  gap: 28px;
}

.logo {
  font-family: var(--narrow);
  font-weight: 600;
  font-size: 1.25rem;
  text-decoration: none;
  margin-right: auto;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.lang-switch {
  display: flex;
  gap: 0;
  border: 1px solid var(--ink);
}

.lang-switch button {
  min-width: 38px;
  height: 30px;
  border: 0;
  border-radius: 0;
  background: transparent;
  font-family: var(--narrow);
  font-weight: 500;
  font-size: 0.85rem;
  color: var(--ink);
  cursor: pointer;
}

.lang-switch button + button {
  border-left: 1px solid var(--ink);
}

.lang-switch button:hover {
  background: var(--sheet-alt);
}

.lang-switch button[aria-pressed="true"] {
  background: var(--ink);
  color: var(--paper);
}

.nav {
  display: flex;
  gap: 28px;
}

.nav a {
  text-decoration: none;
  font-size: 1rem;
  padding: 4px 0;
  border-bottom: 1.5px solid transparent;
}

.nav a:hover,
.nav a:focus-visible {
  border-bottom-color: var(--leader);
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 0;
  background: transparent;
  padding: 0;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  margin: 6px auto;
  background: var(--ink);
}

/* ---------- Leader-line captions ----------
   A caption hangs off its photo with a red leader: a dot on the picture,
   a line down, a short shoulder to the text. */

.hero-portrait figcaption,
.case-media figcaption,
.photo figcaption,
.project-card-body {
  position: relative;
  margin-top: 18px;
  padding-left: 24px;
}

.hero-portrait figcaption::before,
.case-media figcaption::before,
.photo figcaption::before,
.project-card-body::before {
  content: "";
  position: absolute;
  left: 5px;
  top: -30px;
  width: 12px;
  height: calc(30px + 0.8em);
  border-left: 1.5px solid var(--leader);
  border-bottom: 1.5px solid var(--leader);
  pointer-events: none;
}

.hero-portrait figcaption::after,
.case-media figcaption::after,
.photo figcaption::after,
.project-card-body::after {
  content: "";
  position: absolute;
  left: 2px;
  top: -34px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--leader);
  pointer-events: none;
}

/* ---------- Home: hero ---------- */

.hero {
  padding: 56px 0 88px;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(0, 0.7fr);
  gap: 64px;
  align-items: end;
}

.hero h1 {
  font-size: clamp(2.4rem, 5.2vw, 4.25rem);
  line-height: 1.02;
  margin-bottom: 0.45em;
  max-width: 20ch;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 28px 0 0;
}

/* Skills and tags: a plain run of words, separated by slashes. */
.skill-row,
.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 2px 0;
  padding: 0;
  margin: 0;
  list-style: none;
  font-family: var(--narrow);
  font-weight: 500;
  font-size: 1rem;
}

.skill-row {
  margin-top: 36px;
  padding-top: 14px;
  border-top: 1px solid var(--ink);
  max-width: 38rem;
}

.skill-row li + li::before,
.tag-list li + li::before {
  content: "/";
  margin: 0 0.6em;
  color: var(--line);
}

.hero-portrait {
  margin: 0;
}

.hero-portrait img {
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  border-radius: var(--radius);
}

.hero-portrait figcaption {
  display: flex;
  flex-direction: column;
  font-size: 0.92rem;
  line-height: 1.4;
  color: var(--muted);
}

.hero-portrait figcaption span:first-child {
  font-family: var(--narrow);
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--ink);
}

/* ---------- Section headings ---------- */

.section-head {
  margin-bottom: 28px;
}

.section-head h2,
.about h2,
.contact h2 {
  font-size: clamp(1.8rem, 3.2vw, 2.6rem);
}

.page-hero {
  padding: 48px 0 8px;
}

.page-hero h1 {
  font-size: clamp(2.4rem, 5vw, 3.8rem);
  margin-bottom: 0.3em;
}

.page-hero .lead {
  margin-bottom: 0;
}

.school-body {
  padding: 32px 0 104px;
}

.school-body .lead {
  max-width: 38rem;
  color: var(--ink);
  border: 1.5px dashed var(--ink);
  padding: 24px 28px;
}

/* ---------- Home: the two project categories ---------- */

.projets {
  padding-top: 0;
}

.split-gate {
  position: relative;
  isolation: isolate;
  width: min(var(--wrap), calc(100% - 40px));
  margin: 0 auto;
  height: min(68vh, 640px);
  min-height: 420px;
  border: 2px solid var(--ink);
  overflow: hidden;
  background: var(--ink);
}

.split-panel {
  position: absolute;
  inset: 0;
  display: block;
  overflow: hidden;
  color: #fff;
  text-decoration: none;
}

.split-panel img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  max-width: none;
  object-fit: cover;
  object-position: center;
  transform: scale(1.04);
  transition: transform 0.6s ease;
}

.split-panel::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background: rgba(21, 24, 28, 0.5);
  transition: background 0.3s ease;
}

.split-panel:hover img,
.split-panel:focus-visible img {
  transform: scale(1.08);
}

.split-panel:hover::before,
.split-panel:focus-visible::before {
  background: rgba(21, 24, 28, 0.3);
}

.split-personal {
  right: auto;
  width: 64%;
  clip-path: polygon(0 0, 100% 0, 62.5% 100%, 0 100%);
  z-index: 2;
}

.split-school {
  left: auto;
  width: 60%;
  clip-path: polygon(40% 0, 100% 0, 100% 100%, 0 100%);
}

.split-gate::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 4;
  pointer-events: none;
  clip-path: polygon(63.5% 0, 64.5% 0, 40.5% 100%, 39.5% 100%);
  background: var(--ink);
}

.split-copy {
  position: absolute;
  z-index: 3;
  display: flex;
  flex-direction: column;
  gap: 6px;
  max-width: min(22rem, 48%);
}

.split-personal .split-copy {
  left: clamp(20px, 6%, 56px);
  top: 46%;
  transform: translateY(-50%);
}

.split-school .split-copy {
  right: clamp(20px, 6%, 56px);
  bottom: 16%;
  text-align: right;
  align-items: flex-end;
}

.split-title {
  font-family: var(--narrow);
  font-weight: 600;
  font-size: clamp(1.9rem, 3.8vw, 3.2rem);
  letter-spacing: -0.01em;
  line-height: 1.05;
}

.split-cta {
  margin-top: 8px;
  font-size: 1rem;
  font-weight: 500;
  width: fit-content;
  border-bottom: 1.5px solid currentColor;
  padding-bottom: 1px;
}

.split-panel:focus-visible {
  outline: 3px solid #fff;
  outline-offset: -8px;
}

.about,
.contact {
  scroll-margin-top: 80px;
}

/* ---------- Project list (personal.html) ---------- */

.project-grid-section {
  padding: 40px 0 112px;
}

.project-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 64px 40px;
}

.project-card {
  display: flex;
  flex-direction: column;
  height: 100%;
  text-decoration: none;
}

.project-card img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  background: var(--sheet-alt);
  border-radius: var(--radius);
  transition: filter 0.2s ease;
}

.project-card:hover img,
.project-card:focus-visible img {
  filter: brightness(0.92);
}

.project-card-body {
  display: flex;
  flex-direction: column;
  gap: 6px;
  flex: 1;
}

.project-card-meta {
  order: 2;
  font-size: 0.92rem;
  color: var(--muted);
}

.project-card-title {
  order: 1;
  font-family: var(--narrow);
  font-weight: 600;
  font-size: 1.9rem;
  line-height: 1.1;
}

.project-card-text {
  order: 3;
  margin-top: 4px;
  max-width: 34rem;
}

.project-card-cta {
  order: 4;
  margin-top: 6px;
  width: fit-content;
  font-weight: 500;
  color: var(--blue);
  border-bottom: 1.5px solid currentColor;
}

.project-card:hover .project-card-cta,
.project-card:focus-visible .project-card-cta {
  color: var(--ink);
}

/* ---------- Project page (rc-car.html, gorider.html, ...) ---------- */

.wrap-narrow {
  width: min(44rem, calc(100% - 40px));
  margin-inline: auto;
}

.case-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  gap: 56px;
  align-items: start;
  padding: 40px 0 80px;
}

.back-link {
  display: inline-block;
  margin-bottom: 32px;
  color: var(--muted);
  text-decoration: none;
  font-size: 0.95rem;
  border-bottom: 1px solid transparent;
}

.back-link:hover,
.back-link:focus-visible {
  color: var(--ink);
  border-bottom-color: var(--leader);
}

.case-hero h1 {
  font-size: clamp(2.8rem, 6.5vw, 5rem);
  line-height: 0.98;
  margin-bottom: 0.3em;
}

.case-hero .lead {
  font-size: 1.25rem;
  color: var(--ink);
  margin-bottom: 18px;
}

.tag-list {
  color: var(--muted);
}

/* Title block: the fact sheet of a project, ruled like the corner of a drawing. */
.facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 32px 0 0;
  background: var(--ink);
  border: 1.5px solid var(--ink);
}

.facts div {
  padding: 8px 12px 10px;
  background: var(--paper);
}

.facts div:last-child:nth-child(odd) {
  grid-column: 1 / -1;
}

.facts dt {
  font-family: var(--narrow);
  font-weight: 500;
  font-size: 0.74rem;
  letter-spacing: 0.05em; /* anti-slop-ignore: title-block lettering */
  text-transform: uppercase;
  color: var(--muted);
}

.facts dd {
  margin: 0;
  font-size: 0.98rem;
  line-height: 1.4;
}

.steps {
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
  counter-reset: step;
  border-top: 1px solid var(--ink);
}

.steps li {
  counter-increment: step;
  position: relative;
  padding: 14px 0 14px 52px;
  border-bottom: 1px solid var(--line);
}

.steps li::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 8px;
  font-family: var(--narrow);
  font-weight: 600;
  font-size: 1.7rem;
  line-height: 1.3;
  color: var(--blue);
}

.case-media {
  margin: 0;
  justify-self: center;
  width: 100%;
}

.case-media img {
  width: 100%;
  border-radius: var(--radius);
}

.case-media-video {
  width: auto;
}

.case-media video {
  display: block;
  height: min(70vh, 620px);
  width: auto;
  max-width: 100%;
  border-radius: var(--radius);
  background: var(--ink);
}

.case-media figcaption,
.photo figcaption {
  font-size: 0.95rem;
  line-height: 1.45;
  color: var(--ink);
}

.case-body {
  display: flex;
  flex-direction: column;
  gap: 48px;
  padding-bottom: 32px;
}

.case-section h2,
.photo-group h2 {
  font-size: clamp(1.6rem, 2.6vw, 2.1rem);
}

.case-section p,
.photo-intro {
  font-size: 1.1rem;
  line-height: 1.65;
}

.case-embed {
  margin: 0;
}

.case-photos {
  display: flex;
  flex-direction: column;
  gap: 80px;
  padding: 72px 0 96px;
}

.photo-group {
  padding-top: 28px;
  border-top: 1.5px solid var(--ink);
}

.photo-group h2,
.photo-intro {
  max-width: 44rem;
}

.photo-intro {
  margin-bottom: 28px;
}

.photo-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 48px 32px;
  align-items: start;
  margin-top: 24px;
}

.photo-grid-single {
  grid-template-columns: minmax(0, 46rem);
}

.photo {
  margin: 0;
}

/* Portrait photos are letterboxed instead of cropped, so the drawn annotations stay visible. */
.photo .shot img {
  max-height: min(64vh, 560px);
  object-fit: contain;
}

.case-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  margin-bottom: 96px;
  border-top: 1.5px solid var(--ink);
  border-bottom: 1.5px solid var(--ink);
}

.case-nav-link {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 22px 0;
  text-decoration: none;
  transition: background 0.15s ease;
}

.case-nav-link:hover,
.case-nav-link:focus-visible {
  background: var(--paper);
}

.case-nav-link.is-prev {
  padding-right: 24px;
}

.case-nav-link.is-next {
  text-align: right;
  grid-column: 2;
  padding-left: 24px;
  border-left: 1px solid var(--ink);
}

.case-nav-label {
  font-size: 0.9rem;
  color: var(--muted);
}

.case-nav-link.is-prev .case-nav-label::before {
  content: "← ";
}

.case-nav-link.is-next .case-nav-label::after {
  content: " →";
}

.case-nav-name {
  font-family: var(--narrow);
  font-weight: 600;
  font-size: 1.6rem;
  line-height: 1.15;
}

/* ---------- Shared media ---------- */

.credit {
  margin-top: 8px;
  font-size: 0.82rem;
  color: var(--muted);
}

.shot {
  display: block;
  width: 100%;
  margin: 0;
  padding: 0;
  border: 0;
  background: var(--sheet-alt);
  border-radius: var(--radius);
  overflow: hidden;
  cursor: zoom-in;
}

.shot img {
  width: 100%;
  height: auto;
  display: block;
  transition: filter 0.2s ease;
}

.shot:hover img,
.shot:focus-visible img {
  filter: brightness(0.92);
}

.video-frame {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--ink);
}

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

.video-source {
  margin-top: 10px;
  font-size: 0.9rem;
  color: var(--muted);
}

.video-source a {
  text-decoration: underline;
  text-underline-offset: 2px;
}

/* ---------- Home: schools and teams ---------- */

.affiliations {
  padding: 0 0 72px;
}

.affiliations-inner {
  display: flex;
  align-items: center;
  gap: 20px 40px;
  padding: 22px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.affiliations-title {
  flex: none;
  margin: 0;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--muted);
}

.logo-row {
  flex: 1;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 24px 40px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.logo-row a {
  display: block;
  padding: 4px;
}

/* Logos in their own colours. */
.logo-row img {
  display: block;
  width: auto;
}

/* Heights tuned by eye so the four marks look the same size. */
.logo-eth { height: 28px; }
.logo-epfl { height: 30px; }
.logo-ethrc { height: 24px; }
.logo-racing { height: 50px; }

@media (max-width: 640px) {
  .affiliations-inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .logo-row {
    width: 100%;
    justify-content: flex-start;
    gap: 20px 32px;
  }

  .logo-eth,
  .logo-epfl { height: 22px; }
  .logo-ethrc { height: 20px; }
  .logo-racing { height: 40px; }
}

/* ---------- Skills: an index, like the back of a manual ---------- */

.skills {
  padding: 104px 0 0;
  scroll-margin-top: 80px;
}

.skills .section-head {
  margin-bottom: 36px;
}

.skill-index {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 32px 48px;
  align-items: start;
}

.skill-group h3 {
  font-size: 1.2rem;
  margin: 0 0 10px;
}

.skill-group ul {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1.5px solid var(--ink);
}

.skill-group li {
  border-bottom: 1px solid var(--line);
}

.skill-group a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 11px 0;
  text-decoration: none;
}

.skill-name {
  font-weight: 500;
}

/* Dotted leader between the skill and its count. */
.skill-leader {
  flex: 1;
  min-width: 16px;
  border-bottom: 1.5px dotted var(--line);
  transform: translateY(-0.3em);
}

.skill-count {
  color: var(--muted);
  font-size: 0.92rem;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.skill-group a:hover .skill-name,
.skill-group a:focus-visible .skill-name {
  color: var(--blue);
}

.skill-group a:hover .skill-leader,
.skill-group a:focus-visible .skill-leader {
  border-bottom-color: var(--blue);
}

.skill-group a[aria-current="page"] {
  box-shadow: inset 3px 0 0 var(--leader);
  padding-left: 12px;
}

.skill-group a[aria-current="page"] .skill-name {
  font-weight: 600;
}

.skill-hero .back-link {
  margin-bottom: 24px;
}

.skill-hero-group {
  margin: 0 0 6px;
  color: var(--muted);
  font-weight: 500;
}

.skills-other {
  padding: 8px 0 112px;
}

.skills-other h2 {
  font-size: clamp(1.5rem, 2.4vw, 1.9rem);
  margin-bottom: 24px;
}

#skill-projects-section[hidden] + .skills-other {
  padding-top: 40px;
}

[hidden] {
  display: none !important;
}

/* ---------- School projects: compact cards, grouped by course ---------- */

.page-hero-compact {
  padding: 40px 0 4px;
}

.page-hero-compact h1 {
  font-size: clamp(2.1rem, 4vw, 3rem);
}

.school-grid-section {
  padding: 28px 0 112px;
}

/* Four columns. Each course takes as many columns as it has projects (up to 4),
   so small courses share a row, and its cards line up with the page columns. */
.course-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  column-gap: 32px;
  row-gap: 44px;
  align-items: start;
}

.course-block {
  position: relative;
  display: grid;
  grid-template-columns: subgrid;
  row-gap: 18px;
  align-content: start;
}

.course-block.span-1 { grid-column: span 1; }
.course-block.span-2 { grid-column: span 2; }
.course-block.span-3 { grid-column: span 3; }
.course-block.span-4 { grid-column: span 4; }

/* Rule between two courses sitting on the same row (set by skills.js). */
.course-block.has-rule::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: -16px;
  border-left: 1px solid var(--line);
}

.course-block .course-head {
  grid-column: 1 / -1;
  display: block;
  margin: 0;
  padding: 10px 0 0;
  border-top: 1.5px solid var(--ink);
  border-bottom: 0;
}

.course-block .course-head h2 {
  font-size: 1.12rem;
  line-height: 1.2;
  margin: 0 0 2px;
}

.course-block .course-meta {
  font-size: 0.85rem;
  line-height: 1.35;
}

.mini-card {
  display: flex;
  flex-direction: column;
  min-width: 0;
  height: 100%;
  text-decoration: none;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color 0.15s ease;
}

.mini-card:hover,
.mini-card:focus-visible {
  border-color: var(--ink);
}

.mini-card-media {
  position: relative;
  display: block;
  aspect-ratio: 16 / 10;
  background: var(--sheet-alt);
  border-bottom: 1px solid var(--line);
}

.mini-card-media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: filter 0.2s ease;
}

.mini-card:hover .mini-card-media img,
.mini-card:focus-visible .mini-card-media img {
  filter: brightness(0.93);
}

.mini-card-status {
  position: absolute;
  top: 8px;
  left: 8px;
  padding: 1px 7px;
  font-size: 0.74rem;
  font-weight: 500;
  color: var(--ink);
  background: var(--paper);
  border: 1px dashed var(--ink);
}

/* Course grade (Swiss scale, 6 is the top mark). */
.mini-card-grade {
  position: absolute;
  top: 8px;
  right: 8px;
  padding: 1px 7px;
  font-size: 0.74rem;
  font-weight: 600;
  color: var(--paper);
  background: var(--ink);
  font-variant-numeric: tabular-nums;
}

.mini-card-grade.is-ungraded {
  font-weight: 500;
  color: var(--muted);
  background: var(--paper);
  border: 1px solid var(--line);
}

.mini-card-body {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 10px 12px 13px;
}

.mini-card-context {
  font-size: 0.78rem;
  color: var(--muted);
  line-height: 1.3;
}

.mini-card-title {
  font-family: var(--narrow);
  font-weight: 600;
  font-size: 1.08rem;
  line-height: 1.2;
}

.mini-card:hover .mini-card-title,
.mini-card:focus-visible .mini-card-title {
  color: var(--blue);
}

.mini-card-tags {
  display: flex;
  flex-wrap: wrap;
  font-size: 0.78rem;
  line-height: 1.45;
  color: var(--muted);
}

/* The slash sits after each tag, so a wrapped line never starts with one. */
.mini-card-tags span:not(:last-child)::after {
  content: "/";
  margin: 0 0.45em;
  color: var(--line);
}

/* skills.html: same cards, in a plain grid. */
.mini-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
  gap: 28px;
}

/* personal.html: same four columns as the school page. */
.mini-grid-4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 32px;
}

@media (max-width: 980px) {
  .mini-grid-4 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
  }
}

@media (max-width: 640px) {
  .mini-grid-4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }
}

/* project.html */
.tag-links a {
  text-decoration: none;
  border-bottom: 1px solid var(--line);
}

.tag-links a:hover,
.tag-links a:focus-visible {
  color: var(--blue);
  border-bottom-color: currentColor;
}

.text-link {
  color: var(--blue);
  font-weight: 500;
}

.project-missing {
  padding: 64px 0;
}

@media (max-width: 980px) {
  .course-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    column-gap: 24px;
  }

  .course-block.span-4 { grid-column: span 3; }

  .course-block.has-rule::before { left: -12px; }
}

@media (max-width: 640px) {
  .course-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 16px;
    row-gap: 36px;
  }

  .course-block { row-gap: 14px; }

  .course-block.span-3,
  .course-block.span-4 { grid-column: span 2; }

  .course-block.has-rule::before { left: -8px; }

  .mini-card-body { padding: 8px 9px 10px; }

  .mini-card-title { font-size: 0.98rem; }

  .mini-card-tags { font-size: 0.72rem; }
}

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

.course-meta {
  margin: 0;
  color: var(--muted);
}

/* ---------- Scored list (robotic-materials.html) ---------- */

.exercise-list {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  border-top: 1.5px solid var(--ink);
}

.exercise-list li {
  display: grid;
  grid-template-columns: 2.5rem minmax(0, 1fr) auto;
  gap: 4px 16px;
  align-items: baseline;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.exercise-num {
  font-family: var(--narrow);
  font-weight: 600;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

.exercise-body {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.exercise-name {
  width: fit-content;
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px solid var(--line);
}

.exercise-name:hover,
.exercise-name:focus-visible {
  color: var(--blue);
  border-bottom-color: currentColor;
}

.exercise-text {
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.45;
}

.exercise-status {
  font-size: 0.85rem;
  font-weight: 500;
  white-space: nowrap;
  padding: 2px 8px;
  border: 1.5px dashed var(--muted);
  color: var(--muted);
}

.exercise-list .is-done .exercise-status {
  border: 1.5px solid var(--ink);
  background: var(--ink);
  color: var(--paper);
}

@media (max-width: 640px) {
  .exercise-list li {
    grid-template-columns: 2rem minmax(0, 1fr);
  }

  .exercise-status {
    grid-column: 2;
    width: fit-content;
  }
}

/* ---------- Home: about ---------- */

.about {
  padding: 104px 0 96px;
}

.about-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
  gap: 64px;
  align-items: start;
}

.about-grid > div > p {
  max-width: 36rem;
}

/* Set like a parts list. */
.about-card {
  background: var(--paper);
  border: 1.5px solid var(--ink);
}

.about-kicker {
  font-family: var(--narrow);
  font-weight: 600;
  font-size: 1.15rem;
  margin: 0;
  padding: 10px 16px;
  background: var(--ink);
  color: var(--paper);
}

.about-card ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.about-card li {
  padding: 10px 16px;
  font-size: 0.98rem;
  line-height: 1.4;
}

.about-card li + li {
  border-top: 1px solid var(--ink);
}

.education h2 {
  font-size: clamp(1.5rem, 2.4vw, 1.9rem);
}

.edu-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1.5px solid var(--ink);
}

.edu-list li {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: 2px 32px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.edu-school {
  font-weight: 600;
}

.edu-detail {
  color: var(--muted);
}

/* ---------- Home: contact, the one block of colour ---------- */

.contact {
  padding: 88px 0 96px;
  background: var(--blue);
  color: #fff;
}

.contact .lead {
  color: #fff;
}

.contact-links {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 10px;
  margin-top: 32px;
}

.contact-links a {
  font-family: var(--narrow);
  font-weight: 600;
  font-size: clamp(1.4rem, 3.4vw, 2.2rem);
  line-height: 1.2;
  text-decoration: none;
  border-bottom: 2px solid rgba(255, 255, 255, 0.45);
  overflow-wrap: anywhere;
  transition: border-color 0.15s ease;
}

.contact-links a:hover,
.contact-links a:focus-visible {
  border-bottom-color: #fff;
}

.contact :focus-visible {
  outline-color: #fff;
}

.site-footer {
  position: relative;
  z-index: 8;
  background: var(--sheet);
  border-top: 1.5px solid var(--ink);
  padding: 20px 0 28px;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  font-size: 0.92rem;
  color: var(--muted);
}

/* ---------- Lightbox ---------- */

.lightbox {
  border: 0;
  padding: 52px 16px 20px;
  max-width: min(1100px, 94vw);
  background: transparent;
}

.lightbox::backdrop {
  background: rgba(21, 24, 28, 0.9);
}

.lightbox img {
  max-height: 74vh;
  max-width: 100%;
  width: auto;
  height: auto;
  margin: 0 auto;
  object-fit: contain;
  border-radius: var(--radius);
  background: var(--ink);
}

.lightbox-caption {
  color: #fff;
  text-align: center;
  font-size: 0.95rem;
  margin: 12px 8px 0;
}

.lightbox-close {
  position: absolute;
  right: 8px;
  top: 8px;
  width: 40px;
  height: 40px;
  border: 1.5px solid #fff;
  border-radius: 0;
  background: transparent;
  color: #fff;
  font-size: 26px;
  line-height: 1;
  cursor: pointer;
}

.lightbox-close:hover {
  background: #fff;
  color: var(--ink);
}

.lightbox :focus-visible {
  outline-color: #fff;
}

:focus-visible {
  outline: 3px solid var(--ink);
  outline-offset: 3px;
}

/* ---------- Responsive ---------- */

@media (max-width: 980px) {
  .hero-grid,
  .about-grid,
  .case-hero {
    grid-template-columns: 1fr;
  }

  .skill-index {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .hero-grid {
    gap: 48px;
  }

  .case-hero {
    gap: 40px;
    padding-bottom: 56px;
  }

  .split-gate {
    height: auto;
    min-height: 0;
  }

  .split-panel {
    position: relative;
    left: 0;
    right: 0;
    width: 100%;
    clip-path: none;
    height: min(58vw, 360px);
    min-height: 240px;
  }

  .split-gate::after {
    display: none;
  }

  .split-school {
    border-top: 2px solid var(--ink);
  }

  .split-copy,
  .split-personal .split-copy,
  .split-school .split-copy {
    left: 24px;
    right: auto;
    top: auto;
    bottom: 22px;
    transform: none;
    text-align: left;
    align-items: flex-start;
    max-width: 80%;
  }

  .hero-portrait {
    max-width: 320px;
  }

  .nav-toggle {
    display: block;
  }

  .nav {
    display: none;
    position: absolute;
    top: var(--header);
    left: 0;
    right: 0;
    background: var(--sheet);
    border-bottom: 1.5px solid var(--ink);
    flex-direction: column;
    padding: 8px 20px 20px;
    gap: 4px;
    z-index: 30;
  }

  .nav a {
    padding: 10px 0;
    width: fit-content;
  }

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

@media (max-width: 640px) {
  .wrap {
    width: min(var(--wrap), calc(100% - 32px));
  }

  .hero {
    padding: 28px 0 64px;
  }

  .split-gate {
    width: min(var(--wrap), calc(100% - 32px));
  }

  .project-grid,
  .photo-grid,
  .case-nav {
    grid-template-columns: 1fr;
  }

  .project-grid {
    gap: 48px;
  }

  .case-nav-link.is-prev {
    padding-right: 0;
  }

  .case-nav-link.is-next {
    grid-column: auto;
    padding-left: 0;
    border-left: 0;
    border-top: 1px solid var(--ink);
  }

  .edu-list li {
    grid-template-columns: 1fr;
  }

  .skill-index {
    grid-template-columns: 1fr;
  }

  #competences {
    padding-top: 72px;
  }

  .about {
    padding: 72px 0;
  }

  .case-photos {
    gap: 56px;
  }

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

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .btn,
  .shot img,
  .project-card img,
  .split-panel img,
  .split-panel::before {
    transition: none;
  }
}