/* ptiper.com, style "Carnet au trait" : fond crème, encre bleu nuit, beaucoup d'air. Accents turquoise, orange et violet repris du logo. Mode sombre bleu nuit. */

:root {
  --paper: #f5f2e6;
  --ink: #252157;
  --muted: #5c5a74;
  --rule: #ddd7c4;
  --field: #fffdf7;
  --teal: #61bbab;
  --orange: #e2763e;
  --purple: #945baa;
  --red: #e30613;
  --serif: "Source Serif 4", Georgia, "Times New Roman", serif;
  --hand: "Caveat", "Bradley Hand", "Segoe Print", cursive;
  color-scheme: light dark;
}

/* Mode sombre : automatique (prefers-color-scheme), ou forcé par le bouton (data-theme sur <html>). */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #19173d;
    --ink: #f5f2e6;
    --muted: #b7b3cc;
    --rule: #37346a;
    --field: #221f4d;
    --teal: #74cdbd;
    --orange: #f08a52;
    --purple: #b98ad0;
    --red: #ff3b3b;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --paper: #19173d;
  --ink: #f5f2e6;
  --muted: #b7b3cc;
  --rule: #37346a;
  --field: #221f4d;
  --teal: #74cdbd;
  --orange: #f08a52;
  --purple: #b98ad0;
  --red: #ff3b3b;
  color-scheme: dark;
}
:root[data-theme="light"] { color-scheme: light; }

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

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 1.125rem;
  line-height: 1.65;
}

.page {
  max-width: 40rem;
  margin: 0 auto;
  padding: 1.5rem 1.25rem 3rem;
}

a { color: inherit; text-decoration-thickness: 1px; text-underline-offset: 0.2em; }
a:hover { text-decoration-thickness: 2px; }
/* Liens discrets dans le texte (sources, articles) : soulignement pointillé très léger. */
a.quiet { text-decoration-style: dotted; text-decoration-color: var(--rule); text-decoration-thickness: 1.5px; }
a.quiet:hover, a.quiet:focus-visible { text-decoration-style: solid; text-decoration-color: var(--purple); }
::selection { background: var(--teal); color: #252157; }
:focus-visible { outline: 2px solid var(--ink); outline-offset: 3px; }

.skip {
  position: absolute;
  left: -9999px;
}
.skip:focus { left: 1rem; top: 1rem; background: var(--paper); padding: 0.25rem 0.5rem; }

/* En-tête */
nav.top {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 0.5rem;
}

.lang {
  display: flex;
  gap: 0.75rem;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--hand);
  font-size: 1.35rem;
}
.lang a { text-decoration: none; padding: 0.25rem 0.35rem; }
.lang a[aria-current="page"] { text-decoration: underline; text-decoration-thickness: 2px; text-decoration-color: var(--orange); }

.theme-toggle {
  display: inline-grid;
  place-items: center;
  width: 2.5rem;
  height: 2.5rem;
  padding: 0;
  color: var(--ink);
  background: none;
  border: 1.5px solid var(--rule);
  border-radius: 50%;
  cursor: pointer;
}
.theme-toggle svg { width: 1.25rem; height: 1.25rem; }
.theme-toggle .moon { display: none; }
:root[data-theme="dark"] .theme-toggle .sun { display: none; }
:root[data-theme="dark"] .theme-toggle .moon { display: inline; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .theme-toggle .sun { display: none; }
  :root:not([data-theme="light"]) .theme-toggle .moon { display: inline; }
}

.lang-note {
  margin: 1rem auto 0;
  max-width: 32rem;
  padding: 0.5rem 0.9rem;
  font-family: var(--hand);
  font-size: 1.3rem;
  line-height: 1.3;
  text-align: center;
  border: 1.5px dashed var(--rule);
  border-radius: 10px;
}

header.intro { text-align: center; margin-top: 1.5rem; }

/* Logo (vélo, montagne, photo, jeux vidéo, bouffe) au-dessus du nom. */
.logo { display: block; width: 6.5rem; height: 6.5rem; margin: 0 auto 1rem; border-radius: 50%; }

h1 {
  margin: 0;
  font-size: clamp(2.2rem, 7vw, 3.1rem);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.01em;
}

.role { margin: 0.5rem 0 0; color: var(--muted); }

.sketch { margin: 2rem auto 0; max-width: 30rem; }
.sketch svg { display: block; width: 100%; height: auto; color: var(--ink); }
/* Formes pleines du dessin : peintes avec la couleur du fond pour masquer ce qui est derrière. */
.sketch .f { fill: var(--paper); }
/* Touches de couleur : Alpes violettes, Uetliberg et Limmat turquoise, flèches en cuivre vert-de-gris,
   panneau rouge du tram 2, coucou orange. */
.sketch .alps { stroke: var(--purple); opacity: .8; }
.sketch .hill { fill: color-mix(in srgb, var(--teal) 20%, var(--paper)); }
.sketch .tree, .sketch .water { stroke: var(--teal); opacity: 1; }
.sketch .copper { fill: color-mix(in srgb, var(--teal) 60%, var(--paper)); }
.sketch .line2 { fill: var(--red); stroke: var(--red); }
.sketch .line2-num { stroke: #fff; }
.sketch .wave { stroke: var(--orange); stroke-width: 1.4; }
.sketch .bubble { stroke: var(--purple); }
.sketch figcaption {
  margin-top: 0.25rem;
  font-family: var(--hand);
  font-size: 1.6rem;
  color: var(--purple);
  transform: rotate(-2deg);
}

/* Sections */
main section { margin-top: 3.5rem; }

h2 {
  margin: 0 0 1rem;
  font-size: 1.45rem;
  font-weight: 600;
}
h2::after {
  content: "";
  display: block;
  width: 3rem;
  height: 2px;
  margin-top: 0.4rem;
  background: var(--teal);
  border-radius: 2px;
  transform: rotate(-1.5deg);
}
/* Un trait de couleur différent par section, comme les quartiers du logo. */
main section:nth-of-type(3n+2) h2::after { background: var(--orange); }
main section:nth-of-type(3n) h2::after { background: var(--purple); }

p { margin: 0 0 1rem; }

.highlights { margin: 0; padding-left: 1.25rem; }
.highlights li { margin-bottom: 0.75rem; padding-left: 0.25rem; }
.highlights li::marker { content: "✓  "; font-family: var(--hand); font-size: 1.2em; color: var(--teal); }

.topics { margin: 0 0 1rem; padding-left: 1.25rem; }
.topics li { margin-bottom: 0.35rem; }
.topics li::marker { content: "~  "; font-family: var(--hand); color: var(--orange); }

.note { font-family: var(--hand); font-size: 1.45rem; color: var(--muted); }

/* Formulaire */
form { display: grid; gap: 1.1rem; margin-top: 1.5rem; }
label { display: block; font-family: var(--hand); font-size: 1.4rem; line-height: 1.2; }
input, textarea {
  width: 100%;
  margin-top: 0.25rem;
  padding: 0.6rem 0.7rem;
  font: inherit;
  font-size: 1rem;
  color: var(--ink);
  background: var(--field);
  border: 1.5px solid var(--ink);
  border-radius: 3px 6px 4px 7px;
}
textarea { min-height: 9rem; resize: vertical; }
input:focus-visible, textarea:focus-visible { outline-offset: 1px; }

form button {
  justify-self: start;
  padding: 0.55rem 1.4rem;
  font-family: var(--hand);
  font-size: 1.5rem;
  color: var(--paper);
  background: var(--ink);
  border: 0;
  border-radius: 6px 4px 7px 3px;
  cursor: pointer;
}
form button:hover { background: var(--purple); }
form button:disabled { opacity: 0.6; cursor: progress; }

.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }

.status { min-height: 1.5rem; margin-top: 1rem; font-family: var(--hand); font-size: 1.5rem; }
.status:empty { display: none; }

.links { display: flex; flex-wrap: wrap; gap: 0.5rem 1.5rem; margin-top: 2rem; padding: 0; list-style: none; }

/* Pied de page */
footer {
  margin-top: 4rem;
  padding-top: 1rem;
  border-top: 1px solid var(--rule);
  font-size: 0.95rem;
  color: var(--muted);
  text-align: center;
}
footer p { margin: 0; }

@media (min-width: 48rem) {
  .page { padding-top: 2.5rem; }
  body { font-size: 1.1875rem; }
}

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