/* Mise en page de chaque section, dans l'ordre du document. */

/* ---------- En-tête ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgb(11 12 16 / 0.8);
  border-bottom: 1px solid var(--rule);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

.site-header__inner {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  height: var(--header-h);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
  text-decoration: none;
}

.brand__mark {
  width: 28px;
  height: 28px;
}

.brand__watt {
  color: var(--accent);
}

.site-nav {
  display: flex;
  gap: 1.4rem;
  margin-left: auto;
  font-size: 0.95rem;
  color: var(--text-soft);
}

.site-nav a {
  text-decoration: none;
}

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

@media (max-width: 48rem) {
  .site-nav {
    display: none;
  }

  .site-header .btn {
    margin-left: auto;
  }
}

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

.hero {
  padding-block: clamp(2.5rem, 7vw, 5.5rem) clamp(2rem, 5vw, 4rem);
}

.hero__copy {
  display: grid;
  justify-items: start;
  gap: 1.3rem;
  max-width: 44rem;
  margin-bottom: clamp(2rem, 5vw, 3.5rem);
}

.hero__title {
  font-size: clamp(2.2rem, 6vw, 4rem);
  letter-spacing: -0.03em;
  line-height: 1.02;
}

.hero__title em {
  font-style: normal;
  color: var(--accent);
}

.hero__sub {
  max-width: 38rem;
  font-size: clamp(1.1rem, 2vw, 1.3rem);
  line-height: 1.5;
  color: var(--text-soft);
}

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

.hero__note {
  font-size: 0.95rem;
  color: var(--text-faint);
}

/* ---------- Ce qu'elle fait, ce qu'elle ne fait pas ---------- */

.facts {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(2rem, 5vw, 4rem);
}

.facts h2 {
  margin-bottom: 1.2rem;
  font-size: 1.5rem;
}

@media (max-width: 48rem) {
  .facts {
    grid-template-columns: 1fr;
  }
}

/* ---------- Dans la fenêtre ---------- */

.split {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
  gap: clamp(2rem, 5vw, 4rem);
  align-items: center;
  margin-bottom: clamp(1.5rem, 4vw, 2.5rem);
}

.split .section-head {
  margin-bottom: 1.5rem;
}

@media (max-width: 48rem) {
  .split {
    grid-template-columns: 1fr;
  }
}

/* ---------- Bandeau final ---------- */

.cta-band {
  padding-block: var(--section-y);
  text-align: center;
  background: linear-gradient(180deg, var(--bg), var(--bg-raised));
  border-top: 1px solid var(--rule);
}

.cta-band__inner {
  display: grid;
  justify-items: center;
  gap: 1.2rem;
  max-width: 640px;
}

.cta-band p {
  color: var(--text-soft);
}

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

.site-footer {
  padding-block: 2.5rem 3rem;
  border-top: 1px solid var(--rule);
  font-size: 0.95rem;
  color: var(--text-soft);
}

.site-footer__inner {
  display: grid;
  gap: 1.2rem;
}

.site-footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1.2rem;
}

.site-footer nav a {
  text-decoration: none;
}

.site-footer nav a:hover {
  text-decoration: underline;
}

.site-footer__legal {
  color: var(--text-faint);
  max-width: 48rem;
}

/* ---------- Pages secondaires (confidentialité, téléchargement) ---------- */

.page {
  padding-block: clamp(2.5rem, 6vw, 4.5rem);
}

.page h1 {
  margin-bottom: 1rem;
  font-size: clamp(1.9rem, 5vw, 2.8rem);
}

.page h2 {
  margin: 2rem 0 0.6rem;
  font-size: 1.3rem;
}

.page p,
.page ul {
  margin-bottom: 0.8rem;
  color: var(--text-soft);
}

.page ul {
  padding-left: 1.2rem;
}

.page__date {
  color: var(--text-faint);
}

/* ---------- Menu de langue ---------- */

/* Un <details> : il s'ouvre et se ferme sans script ; js/main.js le referme au clic à côté. */
.lang-menu {
  position: relative;
}

.lang-menu summary {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.25rem 0.55rem;
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  font-weight: 650;
  letter-spacing: 0.06em;
  color: var(--text-soft);
  list-style: none;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

.lang-menu summary::-webkit-details-marker {
  display: none;
}

.lang-menu summary::after {
  content: '';
  width: 0.4rem;
  height: 0.4rem;
  margin-top: -0.2rem;
  border: solid currentColor;
  border-width: 0 1.5px 1.5px 0;
  rotate: 45deg;
  transition: rotate 200ms ease, margin 200ms ease;
}

.lang-menu[open] summary::after {
  margin-top: 0.15rem;
  rotate: 225deg;
}

.lang-menu summary:hover,
.lang-menu[open] summary {
  color: var(--text);
  border-color: rgb(255 255 255 / 0.2);
}

.lang-menu__list {
  position: absolute;
  right: 0;
  top: calc(100% + 0.5rem);
  z-index: 20;
  display: grid;
  min-width: 10rem;
  margin: 0;
  padding: 0.35rem;
  list-style: none;
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-md);
  box-shadow: 0 18px 40px rgb(0 0 0 / 0.45);
  animation: rise 200ms var(--ease-out) both;
}

.lang-menu__list a {
  display: block;
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  color: var(--text-soft);
  text-decoration: none;
}

.lang-menu__list a:hover {
  background: rgb(255 255 255 / 0.06);
  color: var(--text);
}

.lang-menu__list a[aria-current='page'] {
  color: var(--accent);
  font-weight: 650;
}

@media (max-width: 48rem) {
  .site-header__inner {
    gap: 0.75rem;
  }

  .lang-menu {
    margin-left: auto;
  }

  .lang-menu + .btn {
    margin-left: 0;
    padding-inline: 0.85rem;
    white-space: nowrap;
  }
}

@media (prefers-reduced-motion: reduce) {
  .lang-menu__list {
    animation: none;
  }
}