/* Site de Luca Birtas : HTML et CSS, plus un petit script pour le bouton de thème. */

/* ---------- Thème : clair « papier » ou sombre « encre » ---------- */

:root {
  color-scheme: light;
  --bg: #fbfaf7;
  --text: #17191e;
  --muted: #5d6370;
  --line: #e3e0d7;
  --accent: #1f3a8a;
  --serif: "Iowan Old Style", Charter, "Source Serif Pro", "Source Serif 4", Cambria, Georgia, serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", "Cascadia Code", Menlo, Consolas, monospace;
  --width: 52rem;
}

/* Sombre : réglage du système, sauf si le visiteur a choisi le clair avec le bouton. */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --bg: #12151b;
    --text: #e9e7e2;
    --muted: #9ba2ae;
    --line: #272c36;
    --accent: #a3b8ff;
  }
}

/* Sombre choisi avec le bouton. */
:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #12151b;
  --text: #e9e7e2;
  --muted: #9ba2ae;
  --line: #272c36;
  --accent: #a3b8ff;
}

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

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

/* Les ancres s'arrêtent sous l'en-tête collant (deux lignes sur téléphone, une au-delà). */
html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-padding-top: 7rem;
}

@media (min-width: 40rem) {
  html {
    scroll-padding-top: 4.5rem;
  }
}

@media (prefers-reduced-motion: no-preference) {
  html {
    scroll-behavior: smooth;
  }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 1rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a:hover {
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
}

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

h1,
h2,
h3,
h4,
p {
  margin: 0;
}

.container {
  width: 100%;
  max-width: var(--width);
  margin-inline: auto;
  padding-inline: 1rem;
}

@media (min-width: 40rem) {
  .container {
    padding-inline: 1.5rem;
  }
}

.skip-link {
  position: absolute;
  top: -4rem;
  left: 1rem;
  z-index: 100;
  padding: 0.5rem 1rem;
  background: var(--text);
  color: var(--bg);
}

.skip-link:focus {
  top: 1rem;
}

.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;
}

/* Petites capitales espacées : étiquettes, titres de section */
.label,
.section h2,
.subhead,
.card .card-kind,
.skills dt {
  font-family: var(--sans);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

/* ---------- En-tête ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid var(--line);
  background: var(--bg);
}

.site-header .container {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.25rem 1.5rem;
  min-height: 3.5rem;
  padding-block: 0.5rem;
}

.brand {
  margin-right: auto;
  color: var(--text);
  font-family: var(--serif);
  font-size: 1.15rem;
}

.brand:hover {
  text-decoration: none;
}

/* Téléphone : nom et bouton de thème en haut, menu en dessous. */
.theme-toggle {
  order: 2;
}

.site-nav {
  order: 3;
  width: 100%;
}

@media (min-width: 40rem) {
  .site-nav {
    order: 2;
    width: auto;
  }

  .theme-toggle {
    order: 3;
  }
}

.site-nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.1rem 1.25rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-nav a {
  color: var(--muted);
  font-size: 0.875rem;
}

.site-nav a:hover {
  color: var(--text);
  text-decoration: none;
}

.theme-toggle {
  display: grid;
  place-items: center;
  width: 2rem;
  height: 2rem;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
}

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

.theme-toggle[hidden] {
  display: none;
}

.theme-toggle svg {
  width: 1rem;
  height: 1rem;
}

/* Le bouton montre le thème vers lequel il bascule : la lune en clair, le soleil en sombre. */
.icon-sun {
  display: none;
}

:root[data-theme="dark"] .icon-sun {
  display: block;
}

:root[data-theme="dark"] .icon-moon {
  display: none;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .icon-sun {
    display: block;
  }

  :root:not([data-theme="light"]) .icon-moon {
    display: none;
  }
}

/* ---------- Accroche ---------- */

.hero {
  padding-block: clamp(3rem, 10vw, 5.5rem) clamp(3rem, 8vw, 4.5rem);
}

.status {
  max-width: 36rem;
  margin-bottom: 0.75rem;
  color: var(--muted);
  font-family: var(--serif);
  font-size: 1.15rem;
  font-style: italic;
}

.hero h1 {
  margin-bottom: 1rem;
  font-family: var(--serif);
  font-size: clamp(3rem, 12vw, 4.75rem);
  font-weight: 400;
  line-height: 1.02;
  letter-spacing: -0.015em;
}

.lede {
  margin-bottom: 2rem;
  padding-top: 1rem;
  border-top: 1px solid var(--text);
  font-size: 1.05rem;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1.5rem;
}

.btn {
  display: inline-block;
  padding: 0.65rem 1.15rem;
  border-radius: 2px;
  background: var(--text);
  color: var(--bg);
  font-size: 0.925rem;
  font-weight: 500;
  line-height: 1.2;
}

.btn:hover {
  background: var(--accent);
  text-decoration: none;
}

.textlink {
  padding-bottom: 0.1rem;
  border-bottom: 1px solid var(--accent);
  font-size: 0.925rem;
}

.textlink:hover {
  border-bottom-width: 2px;
  text-decoration: none;
}

/* ---------- Sections : filet épais et titre en petites capitales ---------- */

.section {
  padding-bottom: clamp(3rem, 8vw, 4.5rem);
}

.section-head {
  margin-bottom: 2rem;
  padding-top: 0.75rem;
  border-top: 2px solid var(--text);
}

.section h2 {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
}

.section h2 .num {
  color: var(--accent);
}

.section-head p {
  max-width: 40rem;
  margin-top: 0.75rem;
  color: var(--muted);
}

.section-head .textlink {
  white-space: nowrap;
}

.subhead {
  margin: 2.5rem 0 1.25rem;
  color: var(--muted);
}

.section-head + .subhead {
  margin-top: 0;
}

/* ---------- Expériences et formation : dates à gauche, détail à droite ---------- */

.entries {
  margin: 0;
  padding: 0;
  list-style: none;
}

.entries > li {
  display: grid;
  gap: 0.35rem 2rem;
  padding-block: 1.5rem;
  border-top: 1px solid var(--line);
}

.entries > li:first-child {
  padding-top: 0;
  border-top: 0;
}

@media (min-width: 40rem) {
  .entries > li {
    grid-template-columns: 10rem minmax(0, 1fr);
  }
}

.entries .meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0 0.75rem;
  color: var(--muted);
  font-size: 0.85rem;
  font-variant-numeric: tabular-nums;
}

@media (min-width: 40rem) {
  .entries .meta {
    display: block;
    padding-top: 0.3rem;
  }
}

.entries h3,
.entries h4 {
  font-family: var(--serif);
  font-size: 1.3rem;
  font-weight: 400;
  line-height: 1.3;
}

.entries .where {
  margin: 0.1rem 0 0.6rem;
  color: var(--accent);
  font-size: 0.95rem;
}

.entries ul,
.points {
  margin: 0;
  padding: 0;
  list-style: none;
  color: var(--muted);
  font-size: 0.95rem;
}

.entries ul li,
.points li {
  position: relative;
  margin-bottom: 0.4rem;
  padding-left: 1.5rem;
}

.entries ul li::before,
.points li::before {
  content: "—";
  position: absolute;
  left: 0;
}

/* ---------- Projets : deux colonnes séparées par des filets, sans boîtes ---------- */

.projects {
  display: grid;
  gap: 0 2.5rem;
}

@media (min-width: 48rem) {
  .projects {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.card {
  display: flex;
  flex-direction: column;
  padding-block: 1.75rem;
  border-top: 1px solid var(--line);
}

.card:first-child {
  padding-top: 0;
  border-top: 0;
}

@media (min-width: 48rem) {
  .card:first-child:not(.card-wide) + .card {
    padding-top: 0;
    border-top: 0;
  }

  /* Projet mis en avant : sur toute la largeur, la démo à gauche et le texte à droite */
  .card-wide {
    display: grid;
    grid-column: 1 / -1;
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
    grid-template-rows: repeat(5, auto) 1fr;
    column-gap: 2.5rem;
  }

  .card-wide > * {
    grid-column: 2;
  }

  .card-wide > .card-demo {
    grid-row: 1 / -1;
    grid-column: 1;
    margin: 0;
  }

  .card-wide .card-foot {
    align-self: end;
  }
}

.card .card-kind {
  margin-bottom: 0.5rem;
  color: var(--accent);
}

.card h3 {
  font-family: var(--serif);
  font-size: 1.35rem;
  font-weight: 400;
  line-height: 1.25;
}

.card .repo {
  margin: 0.25rem 0 0.75rem;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.78rem;
}

.card p {
  margin-bottom: 0.85rem;
  font-size: 0.95rem;
}

.points {
  margin-bottom: 1.1rem;
  font-size: 0.9rem;
}

.card-foot {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.5rem 1rem;
  margin-top: auto;
  padding-top: 0.75rem;
  border-top: 1px solid var(--line);
}

.tags {
  display: flex;
  flex-wrap: wrap;
  margin: 0;
  padding: 0;
  list-style: none;
  color: var(--muted);
  font-size: 0.82rem;
}

.tags li + li::before {
  content: "·";
  margin-inline: 0.45rem;
}

.card-link {
  font-size: 0.875rem;
  white-space: nowrap;
}

.card-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 1rem;
}

/* Démos filmées : la vidéo prend toute la largeur de la carte, ses attributs width/height évitent le saut de mise en page */
.card-demo {
  margin: 0 0 1rem;
}

.card-demo video {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--line);
  border-radius: 3px;
  background: var(--line);
}

.card-demo figcaption {
  margin-top: 0.4rem;
  color: var(--muted);
  font-size: 0.8rem;
}

/* Démo jouable : capture cliquable de la même taille que les vidéos, avec une étiquette discrète */
.card-preview {
  position: relative;
  display: block;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 3px;
  background: var(--line);
}

.card-preview img {
  display: block;
  width: 100%;
  height: auto;
  transition: opacity 0.2s ease;
}

.card-preview-badge {
  position: absolute;
  right: 0.5rem;
  bottom: 0.5rem;
  padding: 0.25rem 0.5rem;
  border: 1px solid var(--accent);
  border-radius: 2px;
  background: var(--bg);
  color: var(--accent);
  font-family: var(--sans);
  font-size: 0.62rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  transition: background 0.2s ease, color 0.2s ease;
}

.card-preview:hover,
.card-preview:focus-visible {
  border-color: var(--accent);
  text-decoration: none;
}

.card-preview:hover img,
.card-preview:focus-visible img {
  opacity: 0.85;
}

.card-preview:hover .card-preview-badge,
.card-preview:focus-visible .card-preview-badge {
  background: var(--accent);
  color: var(--bg);
}

/* Capture claire ou sombre selon le thème, comme les icônes du bouton */
.only-dark {
  display: none !important;
}

:root[data-theme="dark"] .only-light {
  display: none !important;
}

:root[data-theme="dark"] .only-dark {
  display: block !important;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .only-light {
    display: none !important;
  }

  :root:not([data-theme="light"]) .only-dark {
    display: block !important;
  }
}

/* ---------- Compétences ---------- */

.skills {
  margin: 0;
}

.skills > div {
  display: grid;
  gap: 0.25rem 2rem;
  padding-block: 0.9rem;
  border-top: 1px solid var(--line);
}

.skills > div:first-child {
  padding-top: 0;
  border-top: 0;
}

@media (min-width: 40rem) {
  .skills > div {
    grid-template-columns: 10rem minmax(0, 1fr);
  }
}

.skills dt {
  padding-top: 0.2rem;
  color: var(--muted);
}

.skills dd {
  margin: 0;
}

.skills .tags {
  color: var(--text);
  font-size: 0.95rem;
}

/* ---------- Contact ---------- */

.mail {
  display: inline-block;
  border-bottom: 1px solid var(--accent);
  color: var(--text);
  font-family: var(--serif);
  font-size: clamp(1.4rem, 5.5vw, 2.1rem);
  line-height: 1.3;
  overflow-wrap: anywhere;
}

.mail:hover {
  color: var(--accent);
  text-decoration: none;
}

.mail .arrow {
  color: var(--accent);
  font-family: var(--sans);
}

.link-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.75rem;
  margin: 1.75rem 0 0;
  padding: 0;
  list-style: none;
}

/* ---------- Pied de page ---------- */

.site-footer {
  padding-block: 1.5rem 3rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.85rem;
}

.site-footer .container {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.5rem 1.5rem;
}

.site-footer a {
  color: var(--muted);
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

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

/* ---------- Page 404 ---------- */

.notfound {
  display: grid;
  place-content: center;
  min-height: 70vh;
  padding-block: 4rem;
  text-align: center;
}

.notfound .code {
  color: var(--accent);
  font-family: var(--serif);
  font-size: clamp(4rem, 18vw, 7rem);
  line-height: 1;
}

.notfound h1 {
  margin: 1rem 0 0.5rem;
  font-family: var(--serif);
  font-size: clamp(1.6rem, 5vw, 2.2rem);
  font-weight: 400;
}

.notfound p {
  margin-bottom: 2rem;
  color: var(--muted);
}

.notfound .actions {
  justify-content: center;
}

/* ---------- Impression : la page sort comme un CV propre ---------- */

@media print {
  :root,
  :root[data-theme="dark"] {
    color-scheme: light;
    --bg: #fff;
    --text: #000;
    --muted: #333;
    --line: #ccc;
    --accent: #000;
  }

  body {
    font-size: 10.5pt;
  }

  .skip-link,
  .site-header,
  .actions,
  .link-row,
  .card-demo {
    display: none !important;
  }

  .hero,
  .section {
    padding-block: 0.75rem;
  }

  .card,
  .entries > li {
    break-inside: avoid;
  }

  .card-link::after {
    content: " (" attr(href) ")";
  }
}