/* ==========================================================================
   GAIA CONCEPT — COMPOSANTS (V2 — Crystal Water / Vision Pro)
   Header, navigation, boutons, cartes, badges, barre mobile, footer.
   Site majoritairement clair : le header et le footer sont désormais
   des panneaux de verre clairs, plus des blocs sombres opaques.
   Composants réutilisables sur toutes les futures pages du site.
   ========================================================================== */

/* ---------------------------------------------------------------------------
   BOUTONS
   --------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.9em 1.7em;
  font-size: var(--fs-small);
  font-weight: 700;
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  border-radius: var(--radius-full);
  border: 1px solid transparent;
  white-space: nowrap;
  transition: transform var(--duration-fast) var(--ease-standard),
    box-shadow var(--duration-fast) var(--ease-standard),
    background-color var(--duration-fast) var(--ease-standard),
    border-color var(--duration-fast) var(--ease-standard),
    color var(--duration-fast) var(--ease-standard);
}

.btn:hover {
  transform: translateY(-2px);
}

.btn:active {
  transform: translateY(0);
}

.btn-primary {
  background: var(--gradient-brand);
  color: #f7fbff;
  box-shadow: 0 14px 30px rgba(45, 109, 180, 0.32);
}

.btn-primary:hover {
  box-shadow: 0 18px 40px rgba(45, 109, 180, 0.42);
}

/* Bouton "verre" — utilisé sur les fonds clairs (hero, CTA final, etc.) */
.btn-secondary {
  background: var(--glass-bg-soft);
  color: var(--color-ink);
  border-color: var(--glass-border);
  backdrop-filter: blur(var(--glass-blur)) saturate(140%);
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(140%);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.66);
  border-color: rgba(255, 255, 255, 0.9);
}

.btn-outline {
  background: transparent;
  color: var(--color-ink);
  border-color: var(--color-border-strong);
}

.btn-outline:hover {
  border-color: var(--color-blue-600);
  color: var(--color-blue-600);
}

.btn-ghost {
  background: transparent;
  color: var(--color-text-primary);
  padding-inline: 0.4em;
  text-transform: none;
  letter-spacing: normal;
  font-weight: 600;
}

.btn-ghost::after {
  content: "→";
  margin-left: var(--space-2);
  transition: transform var(--duration-fast) var(--ease-standard);
  display: inline-block;
}

.btn-ghost:hover::after {
  transform: translateX(4px);
}

.btn-block {
  width: 100%;
}

/* ---------------------------------------------------------------------------
   HEADER + NAVIGATION
   Panneau de verre clair et flottant, façon Vision Pro.
   --------------------------------------------------------------------------- */
.site-header {
  position: fixed;
  inset-inline: 0;
  top: 0;
  z-index: var(--z-header);
  display: flex;
  flex-direction: column;
  background: var(--glass-bg-soft);
  backdrop-filter: blur(var(--glass-blur)) saturate(160%);
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(160%);
  border-bottom: 1px solid var(--glass-border);
  transition: background-color var(--duration-base) var(--ease-standard),
    box-shadow var(--duration-base) var(--ease-standard),
    border-color var(--duration-base) var(--ease-standard);
}

.site-header.is-scrolled {
  background: var(--glass-bg-strong);
  box-shadow: var(--shadow-medium);
  border-color: var(--color-border-soft);
}

.site-header.is-scrolled .site-header__row--top {
  padding-block: var(--space-2);
}

.site-header.is-scrolled .main-nav__list {
  padding-block: var(--space-2);
}

/* Ligne 1 — logo, téléphone, CTA */
.site-header__row {
  width: 100%;
}

.site-header__row--top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-5);
  padding-block: var(--space-4);
  transition: padding var(--duration-base) var(--ease-standard);
}

/* Logo / wordmark — conteneur prêt pour la future version horizontale transparente */
.brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--color-ink);
  flex-shrink: 0;
}

.brand__mark {
  height: 42px;
  width: 42px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.brand__mark img {
  height: 100%;
  width: 100%;
  object-fit: contain;
}

.brand__wordmark {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: 1;
  white-space: nowrap;
  color: var(--color-ink);
}

.brand__wordmark strong {
  font-weight: 700;
}

.brand__wordmark span {
  display: block;
  font-family: var(--font-body);
  font-size: 0.6rem;
  font-weight: 500;
  letter-spacing: var(--ls-wider);
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-top: 2px;
}

.main-nav {
  display: none;
}

.main-nav__list {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--space-7);
  padding-block: var(--space-3);
  transition: padding var(--duration-base) var(--ease-standard);
}

.main-nav__link {
  position: relative;
  display: inline-block;
  white-space: nowrap;
  font-size: var(--fs-small);
  font-weight: 600;
  color: var(--color-text-secondary);
  padding-block: var(--space-2);
  transition: color var(--duration-fast) var(--ease-standard);
}

.main-nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 100%;
  bottom: -2px;
  height: 2px;
  background: var(--gradient-aqua);
  border-radius: var(--radius-full);
  transition: right var(--duration-base) var(--ease-standard);
}

.main-nav__link:hover,
.main-nav__link:focus-visible,
.main-nav__link[aria-current="page"] {
  color: var(--color-ink);
}

.main-nav__link:hover::after,
.main-nav__link:focus-visible::after,
.main-nav__link[aria-current="page"]::after {
  right: 0;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.header-phone {
  display: none;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-ink);
  font-weight: 600;
  font-size: var(--fs-small);
  white-space: nowrap;
  flex-shrink: 0;
}

.header-phone span {
  white-space: nowrap;
}

.header-phone svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  color: var(--color-blue-600);
}

.nav-toggle {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  color: var(--color-ink);
}

.nav-toggle__bar {
  width: 22px;
  height: 2px;
  background: currentColor;
  border-radius: var(--radius-full);
  transition: transform var(--duration-base) var(--ease-standard),
    opacity var(--duration-base) var(--ease-standard);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* --- Menu mobile plein écran (verre clair) --- */
.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: var(--z-mobile-menu);
  background: rgba(248, 250, 252, 0.98);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  display: flex;
  flex-direction: column;
  padding: calc(var(--header-height-mobile) + var(--space-6)) var(--container-pad) var(--space-8);
  transform: translateY(-100%);
  opacity: 0;
  visibility: hidden;
  transition: transform var(--duration-slow) var(--ease-standard),
    opacity var(--duration-base) var(--ease-standard),
    visibility 0s linear var(--duration-slow);
  overflow-y: auto;
}

.mobile-menu.is-open {
  transform: translateY(0);
  opacity: 1;
  visibility: visible;
  transition: transform var(--duration-slow) var(--ease-standard),
    opacity var(--duration-base) var(--ease-standard),
    visibility 0s linear 0s;
}

.mobile-menu__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  margin-bottom: var(--space-8);
}

.mobile-menu__link {
  display: block;
  padding: var(--space-4) 0;
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 600;
  color: var(--color-ink);
  border-bottom: 1px solid var(--color-border-soft);
}

.mobile-menu__link span {
  color: var(--color-text-muted);
  font-family: var(--font-body);
  font-size: var(--fs-small);
  font-weight: 400;
  display: block;
  margin-top: 2px;
}

.mobile-menu__footer {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  margin-top: auto;
}

.mobile-menu__phone {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--color-ink);
  font-size: 1.1rem;
  font-weight: 600;
}

.mobile-menu__phone svg {
  width: 22px;
  height: 22px;
  color: var(--color-blue-600);
}

/* --- Barre fixe mobile (appel + devis) --- */
.mobile-bar {
  position: fixed;
  bottom: 0;
  inset-inline: 0;
  z-index: var(--z-mobile-bar);
  height: var(--mobile-bar-height);
  display: grid;
  grid-template-columns: 1fr 1fr;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border-top: 1px solid var(--color-border-soft);
  box-shadow: 0 -8px 24px rgba(15, 32, 56, 0.08);
}

.mobile-bar__link {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-weight: 700;
  font-size: var(--fs-small);
}

.mobile-bar__link svg {
  width: 18px;
  height: 18px;
}

.mobile-bar__link--call {
  color: var(--color-ink);
  background: transparent;
}

.mobile-bar__link--quote {
  color: #f7fbff;
  background: var(--gradient-brand);
}

/* ---------------------------------------------------------------------------
   CARTES GÉNÉRIQUES
   --------------------------------------------------------------------------- */
.card {
  background: var(--color-surface);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-soft);
  box-shadow: var(--shadow-soft);
  transition: transform var(--duration-base) var(--ease-standard),
    box-shadow var(--duration-base) var(--ease-standard),
    border-color var(--duration-base) var(--ease-standard);
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-medium);
  border-color: var(--color-border-strong);
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--fs-micro);
  font-weight: 700;
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
}

.badge--air {
  background: var(--color-glacier-100);
  color: var(--color-blue-700);
}

.badge--water {
  background: var(--color-green-100);
  color: var(--color-green-700);
}

.badge--soon {
  background: rgba(201, 183, 158, 0.28);
  color: #6b5a34;
}

/* Icônes rondes (avantages, méthode, etc.) */
.icon-circle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  border-radius: var(--radius-full);
  background: var(--color-glacier-100);
  color: var(--color-blue-700);
  flex-shrink: 0;
}

.icon-circle svg {
  width: 24px;
  height: 24px;
}

.icon-circle--water {
  background: var(--color-green-100);
  color: var(--color-green-700);
}

/* ---------------------------------------------------------------------------
   FOOTER
   Panneau clair — cohérent avec le reste du site (aucune section sombre
   opaque en V2, uniquement des halos et du verre).
   --------------------------------------------------------------------------- */
.site-footer {
  background: var(--color-crystal-100);
  color: var(--color-text-secondary);
  padding-block: var(--space-9) var(--space-6);
  border-top: 1px solid var(--color-border-soft);
}

.site-footer a {
  color: var(--color-text-secondary);
  transition: color var(--duration-fast) var(--ease-standard);
}

.site-footer a:hover,
.site-footer a:focus-visible {
  color: var(--color-ink);
}

.footer-grid {
  display: grid;
  gap: var(--space-7);
  grid-template-columns: 1.4fr repeat(3, 1fr);
  padding-bottom: var(--space-8);
  border-bottom: 1px solid var(--color-border-soft);
}

.footer-brand .brand {
  color: var(--color-ink);
  margin-bottom: var(--space-4);
}

.footer-brand p {
  max-width: 32ch;
  font-size: var(--fs-small);
}

.footer-col h3 {
  color: var(--color-ink);
  font-size: var(--fs-small);
  font-family: var(--font-body);
  font-weight: 700;
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  margin-bottom: var(--space-4);
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  font-size: var(--fs-small);
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding-top: var(--space-6);
  font-size: var(--fs-micro);
  color: var(--color-text-muted);
}

.footer-bottom__legal {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-5);
}