/* =============================================================
   Gaulois2Brière — feuille de style
   100% HTML/CSS, aucune dépendance externe.
   ============================================================= */

/* ---------- Reset minimal ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body { margin: 0; }
img, svg { display: block; max-width: 100%; }
a { color: inherit; }

/* ---------- Variables : palette Brière ---------- */
:root {
  /* Mode clair : papier lin, encre vert très sombre, accent vert tourbe */
  --surface:   #f1ede1;
  --surface-2: #e3dcc7;
  --ink:       #1c2419;
  --ink-muted: #5d6657;
  --rule:      #c4bda5;
  --accent:    #4a6741;   /* vert roseaux */
  --accent-2:  #8b6f47;   /* terre tourbeuse */

  /* Polices système, aucun téléchargement */
  --serif: ui-serif, "Iowan Old Style", "Palatino Linotype", Palatino,
           "Book Antiqua", Charter, Georgia, serif;
  --sans:  ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono:  ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;

  --gutter:  clamp(1.25rem, 4vw, 3rem);
  --section: clamp(3.5rem, 9vw, 7rem);
  --measure: 60ch;

  --fs-xs:   0.8125rem;
  --fs-sm:   0.9375rem;
  --fs-base: clamp(1rem, 0.95rem + 0.2vw, 1.0625rem);
  --fs-lg:   clamp(1.125rem, 1rem + 0.5vw, 1.375rem);
  --fs-xl:   clamp(1.5rem, 1.2rem + 1.2vw, 2.25rem);
  --fs-2xl:  clamp(2.25rem, 1.6rem + 3vw, 4rem);
  --fs-3xl:  clamp(2.75rem, 1.5rem + 6vw, 6.5rem);
}

@media (prefers-color-scheme: dark) {
  :root {
    --surface:   #131613;
    --surface-2: #1c211c;
    --ink:       #e6e2d4;
    --ink-muted: #8a9085;
    --rule:      #2e352e;
    --accent:    #94b683;
    --accent-2:  #c4a26a;
  }
}

/* ---------- Base ---------- */
body {
  background: var(--surface);
  color: var(--ink);
  font-family: var(--serif);
  font-size: var(--fs-base);
  line-height: 1.65;
  font-feature-settings: "kern", "liga", "onum";
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

::selection { background: var(--accent); color: var(--surface); }

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

.skip-link {
  position: absolute;
  top: -40px; left: 1rem;
  background: var(--ink); color: var(--surface);
  padding: 0.5rem 1rem; z-index: 1000; text-decoration: none;
}
.skip-link:focus { top: 1rem; }

.wrap {
  width: min(100% - 2rem, 76rem);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* ---------- Typo ---------- */
h1, h2, h3 {
  font-family: var(--serif);
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -0.015em;
  margin: 0;
  text-wrap: balance;
}
h1 { font-size: var(--fs-3xl); }
h2 { font-size: var(--fs-2xl); font-weight: 500; }
h3 { font-size: var(--fs-xl); font-weight: 500; }

p { margin: 0 0 1em; text-wrap: pretty; max-width: var(--measure); }

a {
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
  transition: color 150ms ease;
}
a:hover { color: var(--accent); }

.eyebrow {
  font-family: var(--sans);
  font-size: var(--fs-xs);
  text-transform: uppercase;
  letter-spacing: 0.22em;
  color: var(--ink-muted);
  font-weight: 500;
  display: inline-block;
}

.lede {
  font-size: var(--fs-lg);
  line-height: 1.5;
  font-style: italic;
  color: var(--ink);
  max-width: 50ch;
}

.fleuron {
  text-align: center;
  color: var(--rule);
  margin: 4rem 0;
  font-size: 1.25rem;
  letter-spacing: 0.5em;
}

/* =============================================================
   TOPBAR + MENU HAMBURGER (CSS pur, via <details>/<summary>)
   ============================================================= */

.topbar {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem clamp(1rem, 4vw, 2.5rem);
  background: color-mix(in srgb, var(--surface) 88%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid transparent;
  transition: border-color 200ms ease;
}

.brand {
  font-family: var(--serif);
  font-size: 1.05rem;
  letter-spacing: 0.02em;
  text-decoration: none;
  font-weight: 500;
  display: inline-flex;
  align-items: baseline;
  gap: 0.5rem;
}
.brand::before {
  content: "";
  display: inline-block;
  width: 9px; height: 9px;
  background: var(--accent);
  border-radius: 50%;
  transform: translateY(-1px);
}

/* Le <details> englobe tout le menu. <summary> est le bouton hamburger. */
.menu { position: relative; }

/* On retire le triangle natif du <summary> */
.menu summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 5px;
  width: 32px;
  padding: 8px 0;
  align-items: end;
  -webkit-tap-highlight-color: transparent;
}
.menu summary::-webkit-details-marker { display: none; }
.menu summary::marker { content: ""; }

/* Les trois traits du hamburger */
.menu summary span {
  display: block;
  height: 1.5px;
  background: var(--ink);
  transition: transform 280ms ease, width 280ms ease, opacity 200ms ease;
}
.menu summary span:nth-child(1) { width: 28px; }
.menu summary span:nth-child(2) { width: 22px; }
.menu summary span:nth-child(3) { width: 28px; }

/* État ouvert : les traits se transforment en croix */
.menu[open] summary span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
  width: 28px;
}
.menu[open] summary span:nth-child(2) { opacity: 0; }
.menu[open] summary span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
  width: 28px;
}

/* L'overlay plein écran */
.menu-panel {
  position: fixed;
  inset: 0;
  background: var(--surface);
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(2rem, 8vw, 5rem);
  /* Animation d'entrée */
  animation: panel-in 350ms cubic-bezier(0.2, 0.8, 0.2, 1);
  z-index: -1; /* derrière la topbar pour que la croix reste cliquable */
}

@keyframes panel-in {
  from { opacity: 0; transform: translateY(-10px); }
  to   { opacity: 1; transform: translateY(0); }
}

.menu-panel ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: clamp(0.75rem, 2vw, 1.25rem);
  counter-reset: nav;
}

.menu-panel li {
  counter-increment: nav;
}

.menu-panel a {
  font-family: var(--serif);
  font-size: clamp(2rem, 8vw, 4.5rem);
  font-weight: 400;
  line-height: 1;
  letter-spacing: -0.02em;
  text-decoration: none;
  color: var(--ink);
  display: inline-flex;
  align-items: baseline;
  gap: 1.25rem;
  transition: color 200ms ease, transform 250ms ease;
}
.menu-panel a::before {
  content: counter(nav, decimal-leading-zero);
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--ink-muted);
  font-feature-settings: "tnum";
  letter-spacing: 0.1em;
  font-weight: 500;
  transform: translateY(-0.6em);
}
.menu-panel a:hover {
  color: var(--accent);
  transform: translateX(0.5rem);
}
.menu-panel a em {
  font-size: 0.4em;
  font-style: italic;
  color: var(--ink-muted);
  font-family: var(--sans);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-left: 0.5rem;
}

.menu-footer {
  margin-top: 4rem;
  font-family: var(--sans);
  font-size: var(--fs-sm);
  color: var(--ink-muted);
  max-width: 40ch;
  font-style: italic;
}

/* Empêche le scroll du body quand le menu est ouvert */
body:has(.menu[open]) { overflow: hidden; }

/* =============================================================
   SECTIONS DE LA PAGE
   ============================================================= */

main { padding-top: 4.5rem; } /* compense la topbar fixe */

/* ----- Hero ----- */
.hero {
  padding: clamp(4rem, 12vw, 9rem) 0 clamp(3rem, 8vw, 6rem);
  display: grid;
  gap: 3rem;
}
@media (min-width: 800px) {
  .hero { grid-template-columns: 1.6fr 1fr; align-items: end; }
}

.hero h1 {
  font-size: var(--fs-3xl);
  line-height: 0.98;
  font-weight: 400;
}
.hero h1 em {
  font-style: italic;
  color: var(--accent);
}
.hero h1 .ampersand {
  font-family: var(--serif);
  font-style: italic;
  color: var(--accent-2);
}

.hero-meta {
  font-family: var(--sans);
  font-size: var(--fs-sm);
  color: var(--ink-muted);
  border-left: 2px solid var(--accent);
  padding-left: 1.25rem;
  max-width: 32ch;
}

/* ----- Sections de prose ----- */
.section {
  padding: var(--section) 0;
  border-top: 1px solid var(--rule);
}
.section-head { margin-bottom: 3rem; }
.section-head h2 { margin-top: 0.75rem; max-width: 22ch; }

/* Disposition deux colonnes : titre à gauche, contenu à droite */
@media (min-width: 900px) {
  .split {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 4rem;
    align-items: start;
  }
  .split .section-head { margin-bottom: 0; position: sticky; top: 6rem; }
}

/* ----- Galerie d'images ----- */
.gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 18rem), 1fr));
  gap: clamp(1rem, 2.5vw, 2rem);
  margin: 0;
  padding: 0;
}

.gallery figure {
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.gallery img,
.gallery svg {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  background: var(--surface-2);
  transition: transform 400ms ease, filter 400ms ease;
}

.gallery figure:hover img,
.gallery figure:hover svg {
  transform: scale(1.02);
  filter: brightness(1.04);
}

.gallery figcaption {
  font-family: var(--sans);
  font-size: var(--fs-xs);
  letter-spacing: 0.05em;
  color: var(--ink-muted);
  display: flex;
  justify-content: space-between;
  gap: 1rem;
}
.gallery figcaption .place {
  text-transform: uppercase;
  letter-spacing: 0.15em;
}

/* Variante : grosse image en pleine largeur */
.gallery--feature {
  grid-template-columns: 1fr;
}
.gallery--feature img,
.gallery--feature svg {
  aspect-ratio: 16 / 7;
}

/* ----- Liste "à venir" ----- */
.upcoming {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
}
.upcoming li {
  display: grid;
  grid-template-columns: 4ch 1fr auto;
  align-items: baseline;
  gap: 1.5rem;
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--rule);
}
.upcoming .num {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--ink-muted);
  font-feature-settings: "tnum";
}
.upcoming .label {
  font-size: var(--fs-lg);
  font-weight: 500;
}
.upcoming .label span {
  display: block;
  font-size: var(--fs-sm);
  font-style: italic;
  color: var(--ink-muted);
  font-weight: 400;
  margin-top: 0.2rem;
  max-width: 50ch;
}
.upcoming .when {
  font-family: var(--sans);
  font-size: var(--fs-xs);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--ink-muted);
}

/* ----- Bloc contact ----- */
.contact-block {
  text-align: center;
  padding: var(--section) 0;
  border-top: 1px solid var(--rule);
}
.contact-block h2 {
  max-width: 18ch;
  margin: 0 auto 2rem;
}
.contact-block .mail {
  display: inline-block;
  font-family: var(--serif);
  font-size: var(--fs-2xl);
  text-decoration: none;
  border-bottom: 1px solid var(--rule);
  padding-bottom: 0.25rem;
  transition: border-color 200ms ease;
}
.contact-block .mail:hover {
  border-bottom-color: var(--accent);
  color: var(--accent);
}

/* ----- Footer ----- */
.site-footer {
  border-top: 1px solid var(--rule);
  padding: 2.5rem 0;
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--ink-muted);
}
.site-footer .wrap {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

/* ---------- Respect du reduced-motion ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0s !important;
    transition-duration: 0s !important;
    scroll-behavior: auto !important;
  }
}