/* ==========================================================================
   Colette Nys-Mazure — Site officiel
   Feuille de style principale — responsive
   Inspirée du thème d'origine (Flatsome) : sans-serif, accent vert, fond crème
   ========================================================================== */

:root {
  --bg:        #f7f5f4;
  --bg-alt:    #efece8;
  --text:      #444444;
  --heading:   #333333;
  --muted:     #7a7a7a;
  --accent:    #6bd07f;
  --accent-dk: #4bb763;
  --line:      #e3ded7;
  --max:       1080px;
  --sans:      "Lato", "Helvetica Neue", Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 112.5%; } /* 1rem = 18px : textes un peu plus grands */

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 1rem;
  line-height: 1.75;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
}

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

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

.container { max-width: var(--max); margin: 0 auto; padding: 0 22px; }

h1, h2, h3, h4, h5 {
  color: var(--heading);
  font-weight: 700;
  line-height: 1.3;
  margin: 0 0 .6em;
}
h1 { font-size: 2.2rem; }
h2 { font-size: 1.7rem; }
h3 { font-size: 1.2rem; }
.uppercase { text-transform: uppercase; letter-spacing: .04em; }

p { margin: 0 0 1.2em; }

/* ---------- Header / Navigation ---------- */
.site-header {
  background: var(--bg);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 100;
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 22px;
  gap: 16px;
}
.brand { display: flex; align-items: center; }
.brand img { width: 340px; max-width: 58vw; height: auto; }

.nav-toggle {
  display: none;
  background: none; border: 0; cursor: pointer;
  font-size: 1.6rem; color: var(--heading); line-height: 1;
}
.main-nav ul { list-style: none; display: flex; gap: 26px; margin: 0; padding: 0; }
.main-nav a {
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--heading);
  padding: 8px 0;
  border-bottom: 2px solid transparent;
}
.main-nav a:hover, .main-nav a.active {
  color: var(--accent-dk);
  border-bottom-color: var(--accent);
}

/* ---------- Home : bannières en haut ---------- */
.hero-section {
  background: var(--bg);
  padding: 30px 0;
}
.hero-banners {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 22px;
  display: flex;
  align-items: center;          /* align-middle : tuiles centrées vs portrait */
  gap: 30px;
}
.hero-banner {
  flex: 1 1 0;
  position: relative;
  margin: 0;
  background-color: var(--bg);
  background-size: cover;
  background-repeat: no-repeat;
}
.hero-banner.tile { aspect-ratio: 1 / 1; }       /* tuiles carrées */
.hero-banner.portrait { aspect-ratio: 387 / 550; } /* portrait plus haut */
.hero-banner .credit {
  position: absolute;
  left: 0;
  bottom: -26px;
  margin: 0;
  font-size: .68rem;
  letter-spacing: .04em;
  color: var(--muted);
  text-align: left;
}

/* ---------- Home : titre + intro ---------- */
.home-intro {
  text-align: center;
  padding: 46px 0 30px;
}
.home-intro h1 { font-size: 2.4rem; margin-bottom: .5em; }
.home-intro .intro-text {
  max-width: 720px;
  margin: 0 auto 1.4em;
  font-size: 1.06rem;
}
.btn {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  padding: 13px 28px;
  border-radius: 2px;
}
.btn:hover { background: var(--accent-dk); color: #fff; }

/* ---------- Home : citation parallax sombre ---------- */
.quote-section {
  position: relative;
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
  padding: 120px 22px;
  text-align: center;
  color: #fff;
}
.quote-section::before {
  content: "";
  position: absolute; inset: 0;
  background: rgba(0,0,0,.46);
}
.quote-section .quote-inner { position: relative; max-width: 760px; margin: 0 auto; }
.quote-section .quote-text {
  color: #fff;
  font-style: italic;
  font-weight: 400;
  font-size: 2.1rem;
  line-height: 1.4;
  margin-bottom: .4em;
}
.quote-section cite {
  display: block;
  font-style: normal;
  font-size: .85rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: rgba(255,255,255,.85);
}

/* ---------- Home : photo arbre + bio (rangée 2 colonnes) ---------- */
.bio-row-section { padding: 80px 0; }
.bio-row {
  display: flex;
  align-items: center;          /* align-middle */
  gap: 50px;
}
.bio-photo { flex: 0 0 42%; max-width: 42%; margin: 0; }
.bio-photo img { width: 100%; border-radius: 2px; }
.bio-photo .credit {
  text-align: left;
  font-size: .68rem;
  letter-spacing: .04em;
  color: var(--muted);
  margin: 10px 0 0;
}
.bio-body { flex: 1 1 58%; }
.bio-body .sign { text-align: right; font-style: italic; color: var(--muted); }

/* ---------- Titres de page intérieures ---------- */
.page-title { text-align: center; font-size: 2rem; margin-bottom: .2em; }
.page-title-rule { width: 60px; height: 3px; background: var(--accent); margin: 0 auto 2.2em; border: 0; }

main { padding: 0 0 20px; }
.page-inner { padding-top: 50px; }

/* ---------- Bibliographie ---------- */
.biblio-nav {
  position: sticky; top: 86px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 3px;
  padding: 13px 16px;
  margin-bottom: 38px;
  z-index: 50;
}
.biblio-nav ul {
  list-style: none; margin: 0; padding: 0;
  display: flex; flex-wrap: wrap; gap: 8px 20px; justify-content: center;
}
.biblio-nav a {
  font-size: .68rem; font-weight: 700; letter-spacing: .1em;
  text-transform: uppercase; color: var(--muted);
}
.biblio-nav a:hover { color: var(--accent-dk); }

.biblio-section { margin-bottom: 46px; scroll-margin-top: 150px; }
.biblio-section > h2 {
  border-bottom: 3px solid var(--accent);
  padding-bottom: .25em; display: inline-block;
}
.biblio-section h3 {
  font-size: .95rem; letter-spacing: .06em; text-transform: uppercase;
  color: var(--accent-dk); margin-top: 1.8em;
}
.biblio-list { list-style: none; margin: 0; padding: 0; }
.biblio-list li {
  padding: .5em 0; border-bottom: 1px solid var(--line);
  font-size: .95rem; line-height: 1.6;
}
.biblio-list li:last-child { border-bottom: 0; }
.biblio-note { font-size: .95rem; color: var(--muted); }
.biblio-note.quote { font-style: italic; padding-left: 16px; border-left: 3px solid var(--accent); }

/* ---------- Couvertures ---------- */
.books-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 36px 30px;
}
.book-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 3px;
  overflow: hidden;
  display: flex; flex-direction: column;
}
.book-card .cover {
  background: var(--bg-alt);
  padding: 26px;
  display: flex; align-items: center; justify-content: center;
  min-height: 270px;
}
.book-card .cover img { max-height: 310px; width: auto; box-shadow: 0 8px 20px rgba(0,0,0,.16); }
.book-card .book-body { padding: 20px 22px 24px; }
.book-card h2 { font-size: 1.25rem; margin: 0 0 .5em; }
.book-card p { font-size: .9rem; margin-bottom: .8em; }
.book-card .source { font-size: .82rem; color: var(--muted); font-style: italic; }

/* ---------- Contact ---------- */
.contact-block { text-align: center; max-width: 640px; margin: 30px auto; }
.contact-block p { font-size: 1.3rem; line-height: 1.7; color: var(--heading); }
.contact-mail { display: inline-block; margin-top: 16px; font-size: 1.4rem; font-weight: 700; word-break: break-word; }

/* ---------- Footer ---------- */
.site-footer {
  background: var(--bg-alt);
  border-top: 1px solid var(--line);
  padding: 36px 0;
  margin-top: 50px;
}
.site-footer .container {
  display: flex; flex-wrap: wrap;
  align-items: center; justify-content: space-between; gap: 16px;
}
.site-footer nav ul { list-style: none; display: flex; flex-wrap: wrap; gap: 20px; margin: 0; padding: 0; }
.site-footer a, .site-footer p {
  font-size: .68rem; letter-spacing: .1em; text-transform: uppercase; color: var(--muted); margin: 0;
}

/* ---------- Responsive ---------- */
@media (max-width: 850px) {
  .nav-toggle { display: block; }
  .main-nav {
    display: none;
    position: absolute; top: 100%; left: 0; right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--line);
    box-shadow: 0 12px 24px rgba(0,0,0,.08);
  }
  .main-nav.open { display: block; }
  .main-nav ul { flex-direction: column; gap: 0; padding: 6px 0; }
  .main-nav li { border-top: 1px solid var(--line); }
  .main-nav li:first-child { border-top: 0; }
  .main-nav a { display: block; padding: 14px 22px; border-bottom: 0; }

  .quote-section { background-attachment: scroll; padding: 80px 22px; }
  .quote-section .quote-text { font-size: 1.6rem; }
  .home-intro h1 { font-size: 1.9rem; }
  .biblio-nav { position: static; }

  .bio-row-section { padding: 50px 0; }
  .bio-row { flex-direction: column; align-items: stretch; gap: 28px; }
  .bio-photo { flex: none; max-width: 100%; }
}

@media (max-width: 600px) {
  .hero-banners { flex-direction: column; align-items: stretch; gap: 36px; }
  .hero-banner.tile, .hero-banner.portrait { aspect-ratio: 16 / 10; }
  .hero-banner .credit { bottom: -24px; }
}

@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .home-intro h1 { font-size: 1.6rem; }
  .contact-block p { font-size: 1.1rem; }
  .contact-mail { font-size: 1.1rem; }
}