/* =========================================================
   COMPONENTS — rempli progressivement par les Tasks 2 à 6.
   Ordre : Header, Footer, Buttons, Cards, Section headers,
           FAQ, Search, Forms
   ========================================================= */

/* -----------------------------------------------------------
   SITE HEADER — sticky, frosted glass, burger mobile
   ----------------------------------------------------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(248, 249, 251, 0.85);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  border-bottom: 1px solid var(--trait);
  padding: var(--space-sm) 0;
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
}

.site-header__brand {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.125rem;
  letter-spacing: 0.06em;
  color: var(--bleu-principal);
  display: inline-flex;
  align-items: center;
}

.site-header__logo {
  height: 52px;
  width: auto;
  display: block;
}

.site-header__nav {
  display: flex;
  gap: var(--space-md);
  font-family: var(--font-ui);
  font-size: var(--fs-small);
}

.site-header__nav a {
  color: var(--texte-principal);
  transition: color var(--duration-fast) var(--ease-out);
  position: relative;
}

.site-header__nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 100%;
  height: 2px;
  background: var(--bleu-principal);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--duration-fast) var(--ease-out);
}

.site-header__nav a:hover,
.site-header__nav a.is-active {
  color: var(--bleu-principal);
}

.site-header__nav a.is-active::after {
  transform: scaleX(1);
}

.site-header__cta {
  padding: 0.625rem 1.25rem;
  background: var(--bleu-principal);
  color: var(--fond-blanc);
  border-radius: var(--radius-full);
  font-family: var(--font-ui);
  font-weight: 600;
  font-size: var(--fs-small);
  transition:
    background var(--duration-fast) var(--ease-out),
    transform var(--duration-fast) var(--ease-out);
}

.site-header__cta:hover {
  background: var(--bleu-nuit);
  transform: translateY(-1px);
}

.site-header__burger {
  display: none;
  padding: 0.5rem;
  width: 44px;
  height: 44px;
  position: relative;
}

.site-header__burger span,
.site-header__burger span::before,
.site-header__burger span::after {
  position: absolute;
  content: "";
  width: 22px;
  height: 2px;
  background: var(--bleu-principal);
  transition: transform var(--duration-fast) var(--ease-out);
}

.site-header__burger span {
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.site-header__burger span::before {
  top: -7px;
  left: 0;
}

.site-header__burger span::after {
  top: 7px;
  left: 0;
}

@media (max-width: 900px) {
  .site-header__nav {
    display: none;
  }
  .site-header__cta {
    display: none;
  }
  .site-header__burger {
    display: block;
  }
  .site-header__nav.is-open {
    display: flex;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--fond-blanc);
    padding: var(--space-md);
    box-shadow: var(--shadow-soft);
    border-top: 1px solid var(--trait);
  }
  .site-header__nav.is-open .site-header__cta-mobile {
    display: inline-block;
  }
}

/* -----------------------------------------------------------
   SITE FOOTER — sombre, 4 colonnes, signature DIGIT'AXE
   ----------------------------------------------------------- */

.site-footer {
  background: var(--bleu-nuit);
  color: var(--fond-clair);
  padding: var(--space-lg) 0 var(--space-md);
}

.site-footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}

@media (max-width: 900px) {
  .site-footer__grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-lg) var(--space-md);
  }
}

@media (max-width: 480px) {
  .site-footer__grid {
    grid-template-columns: 1fr;
  }
}

.site-footer__col h4 {
  color: var(--or-clair);
  font-family: var(--font-ui);
  font-size: var(--fs-small);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin: 0 0 var(--space-sm);
  font-weight: 600;
}

.site-footer__col ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.site-footer__col li {
  margin-bottom: 0.5rem;
  font-size: var(--fs-small);
  font-family: var(--font-ui);
}

.site-footer__col a {
  color: rgba(248, 249, 251, 0.75);
  transition: color var(--duration-fast) var(--ease-out);
}

.site-footer__col a:hover {
  color: var(--fond-clair);
}

.site-footer__brand {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--fond-blanc);
  margin-bottom: var(--space-sm);
}

.site-footer__baseline {
  font-size: var(--fs-small);
  color: rgba(248, 249, 251, 0.65);
  max-width: 320px;
  font-family: var(--font-corps);
}

.site-footer__legal {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: var(--space-md);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-sm);
  font-size: var(--fs-micro);
  color: rgba(248, 249, 251, 0.55);
  font-family: var(--font-ui);
}

.site-footer__signature {
  color: var(--or-clair);
}

.site-footer__signature strong {
  color: var(--fond-blanc);
  font-weight: 700;
  letter-spacing: 0.06em;
}

/* -----------------------------------------------------------
   BUTTONS — 4 variantes principales + tailles
   Effet "liquid glass" : reflet supérieur permanent + shine
   qui traverse au hover, inset ring pour la profondeur.
   ----------------------------------------------------------- */

.btn {
  position: relative;
  display: inline-block;
  padding: 0.875rem 1.75rem;
  font-family: var(--font-ui);
  font-weight: 600;
  font-size: var(--fs-small);
  letter-spacing: 0.02em;
  border-radius: var(--radius-full);
  transition:
    transform var(--duration-fast) var(--ease-out),
    box-shadow var(--duration-fast) var(--ease-out),
    background var(--duration-fast) var(--ease-out),
    color var(--duration-fast) var(--ease-out),
    border-color var(--duration-fast) var(--ease-out);
  cursor: pointer;
  text-align: center;
  white-space: nowrap;
  overflow: hidden;
  isolation: isolate;
  will-change: transform;
}

/* Reflet supérieur permanent (glass highlight) */
.btn::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: linear-gradient(
    180deg,
    rgba(255, 255, 255, 0.28) 0%,
    rgba(255, 255, 255, 0.05) 40%,
    transparent 60%
  );
  pointer-events: none;
  z-index: 1;
  opacity: 0.9;
}

/* Shine qui traverse au hover */
.btn::after {
  content: "";
  position: absolute;
  top: 0;
  left: -60%;
  width: 60%;
  height: 100%;
  background: linear-gradient(
    100deg,
    transparent 0%,
    rgba(255, 255, 255, 0.35) 50%,
    transparent 100%
  );
  transform: skewX(-20deg);
  transition: left var(--duration-slow) var(--ease-out);
  pointer-events: none;
  z-index: 2;
}

.btn:hover::after {
  left: 130%;
}

.btn:hover {
  transform: translateY(-3px);
}

.btn:active {
  transform: translateY(-1px);
  transition-duration: 80ms;
}

.btn > * {
  position: relative;
  z-index: 3;
}

.btn--primary {
  background: linear-gradient(135deg, var(--bleu-principal) 0%, #244a80 100%);
  color: var(--fond-blanc);
  box-shadow:
    0 6px 20px rgba(26, 58, 107, 0.28),
    inset 0 0 0 1px rgba(255, 255, 255, 0.12),
    inset 0 -6px 12px rgba(13, 31, 61, 0.35);
}

.btn--primary:hover {
  box-shadow:
    0 14px 36px rgba(13, 31, 61, 0.35),
    inset 0 0 0 1px rgba(255, 255, 255, 0.2),
    inset 0 -6px 14px rgba(13, 31, 61, 0.4);
}

.btn--outline {
  background: rgba(26, 58, 107, 0.04);
  color: var(--bleu-principal);
  border: 1.5px solid var(--bleu-principal);
  padding: calc(0.875rem - 1.5px) calc(1.75rem - 1.5px);
  backdrop-filter: blur(8px) saturate(160%);
  -webkit-backdrop-filter: blur(8px) saturate(160%);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.4);
}

.btn--outline::before {
  background: linear-gradient(
    180deg,
    rgba(255, 255, 255, 0.5) 0%,
    rgba(255, 255, 255, 0.1) 40%,
    transparent 60%
  );
}

.btn--outline:hover {
  background: var(--bleu-principal);
  color: var(--fond-blanc);
  box-shadow:
    0 12px 28px rgba(26, 58, 107, 0.25),
    inset 0 0 0 1px rgba(255, 255, 255, 0.15);
}

.btn--outline-light {
  background: rgba(255, 255, 255, 0.05);
  color: var(--fond-blanc);
  border: 1.5px solid rgba(255, 255, 255, 0.4);
  padding: calc(0.875rem - 1.5px) calc(1.75rem - 1.5px);
  backdrop-filter: blur(10px) saturate(160%);
  -webkit-backdrop-filter: blur(10px) saturate(160%);
}

.btn--outline-light:hover {
  background: rgba(255, 255, 255, 0.15);
  border-color: var(--fond-blanc);
  box-shadow:
    0 12px 28px rgba(0, 0, 0, 0.25),
    inset 0 0 0 1px rgba(255, 255, 255, 0.2);
}

.btn--gold {
  background: linear-gradient(135deg, var(--or-clair) 0%, #e6d3b0 100%);
  color: var(--bleu-nuit);
  box-shadow:
    0 6px 20px rgba(217, 196, 160, 0.4),
    inset 0 0 0 1px rgba(255, 255, 255, 0.35),
    inset 0 -6px 12px rgba(180, 145, 90, 0.35);
}

.btn--gold::before {
  background: linear-gradient(
    180deg,
    rgba(255, 255, 255, 0.55) 0%,
    rgba(255, 255, 255, 0.1) 40%,
    transparent 60%
  );
}

.btn--gold:hover {
  background: linear-gradient(135deg, #e0cba0 0%, #ecdbb8 100%);
  box-shadow:
    0 14px 36px rgba(217, 196, 160, 0.5),
    inset 0 0 0 1px rgba(255, 255, 255, 0.45),
    inset 0 -6px 14px rgba(180, 145, 90, 0.4);
}

.btn--large {
  padding: 1.125rem 2.25rem;
  font-size: var(--fs-body);
}

.btn--outline.btn--large {
  padding: calc(1.125rem - 1.5px) calc(2.25rem - 1.5px);
}

.btn--outline-light.btn--large {
  padding: calc(1.125rem - 1.5px) calc(2.25rem - 1.5px);
}

.btn--full {
  display: block;
  width: 100%;
}

@media (prefers-reduced-motion: reduce) {
  .btn::after { display: none; }
  .btn:hover { transform: none; }
}

/* -----------------------------------------------------------
   CTA FINAL — bloc partagé sur toutes les pages
   ----------------------------------------------------------- */

.cta-final {
  padding: calc(var(--space-xl) + var(--space-md)) 0 calc(var(--space-xl) + var(--space-md));
  background: var(--bleu-nuit);
  color: var(--fond-clair);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-final::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(217, 196, 160, 0.15), transparent 60%);
  pointer-events: none;
}

.cta-final__inner {
  position: relative;
  z-index: 1;
  max-width: 720px;
  margin: 0 auto;
}

.cta-final .section-head__eyebrow {
  padding: 0.5rem 1.25rem;
  font-size: var(--fs-small);
  letter-spacing: 0.18em;
  margin-bottom: var(--space-md);
  background: rgba(217, 196, 160, 0.22);
  color: var(--or-clair);
  border: 1px solid rgba(217, 196, 160, 0.35);
}

.cta-final__title {
  color: var(--fond-blanc);
  font-size: var(--fs-h1);
  margin-bottom: var(--space-md);
  text-wrap: balance;
}

.cta-final__lead {
  color: rgba(248, 249, 251, 0.75);
  font-size: 1.125rem;
  margin-bottom: var(--space-lg);
  font-family: var(--font-corps);
  text-wrap: pretty;
}

/* -----------------------------------------------------------
   CARDS — standard + frosted glass
   ----------------------------------------------------------- */

.card {
  background: var(--fond-blanc);
  border-radius: var(--radius-lg);
  padding: var(--space-md);
  box-shadow: var(--shadow-soft);
  transition:
    transform var(--duration-base) var(--ease-out),
    box-shadow var(--duration-base) var(--ease-out);
  height: 100%;
  display: flex;
  flex-direction: column;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}

.card--frost {
  background: var(--frost-white);
  backdrop-filter: blur(var(--frost-blur)) saturate(180%);
  -webkit-backdrop-filter: blur(var(--frost-blur)) saturate(180%);
  border: 1px solid rgba(255, 255, 255, 0.5);
}

.card--highlighted {
  border: 2px solid var(--or-clair);
  position: relative;
}

.card--highlighted::before {
  content: "Recommandé";
  position: absolute;
  top: -0.75rem;
  right: 1.5rem;
  background: var(--or-clair);
  color: var(--bleu-nuit);
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
  font-family: var(--font-ui);
  font-size: var(--fs-micro);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.card__eyebrow {
  color: var(--bleu-principal);
  font-family: var(--font-ui);
  font-size: var(--fs-micro);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-weight: 600;
  margin-bottom: var(--space-xs);
}

.card__title {
  font-family: var(--font-display);
  font-size: var(--fs-h3);
  margin-bottom: var(--space-sm);
  color: var(--bleu-principal);
}

.card__body {
  color: var(--texte-secondaire);
  font-size: var(--fs-small);
  flex-grow: 1;
}

.card__footer {
  margin-top: var(--space-md);
}

/* -----------------------------------------------------------
   SECTION HEADERS — eyebrow + title + lead
   ----------------------------------------------------------- */

.section-head {
  max-width: 720px;
  margin: 0 auto var(--space-lg);
  text-align: center;
}

.section-head--left {
  text-align: left;
  margin-left: 0;
}

.section-head__eyebrow {
  display: inline-block;
  padding: 0.375rem 0.875rem;
  background: rgba(26, 58, 107, 0.08);
  color: var(--bleu-principal);
  border-radius: var(--radius-full);
  font-family: var(--font-ui);
  font-size: var(--fs-micro);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-weight: 600;
  margin-bottom: var(--space-sm);
}

.section-head--dark .section-head__eyebrow {
  background: rgba(217, 196, 160, 0.15);
  color: var(--or-clair);
}

.section-head__title {
  font-size: var(--fs-h1);
  color: var(--bleu-nuit);
  margin-bottom: var(--space-sm);
  text-wrap: balance;
}

.section-head--dark .section-head__title {
  color: var(--fond-blanc);
}

.section-head__lead {
  font-size: var(--fs-body);
  color: var(--texte-secondaire);
  font-family: var(--font-corps);
  max-width: 640px;
  margin: 0 auto;
}

.section-head--dark .section-head__lead {
  color: rgba(248, 249, 251, 0.75);
}

/* -----------------------------------------------------------
   FAQ — item cliquable, réponse en accordéon, schema.org
   ----------------------------------------------------------- */

.faq {
  max-width: var(--container-narrow);
  margin: 0 auto;
}

.faq__item {
  border-bottom: 1px solid var(--trait);
}

.faq__item:first-child {
  border-top: 1px solid var(--trait);
}

.faq__item h3 {
  margin: 0;
}

.faq__question {
  width: 100%;
  padding: var(--space-md) 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  text-align: left;
  font-family: var(--font-display);
  font-size: var(--fs-h3);
  font-weight: 500;
  color: var(--bleu-nuit);
  transition: color var(--duration-fast) var(--ease-out);
}

.faq__question:hover {
  color: var(--bleu-principal);
}

.faq__icon {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  margin-left: var(--space-md);
  position: relative;
}

.faq__icon::before,
.faq__icon::after {
  content: "";
  position: absolute;
  background: var(--bleu-principal);
  transition: transform var(--duration-fast) var(--ease-out), opacity var(--duration-fast) var(--ease-out);
}

.faq__icon::before {
  top: 15px;
  left: 8px;
  right: 8px;
  height: 2px;
}

.faq__icon::after {
  left: 15px;
  top: 8px;
  bottom: 8px;
  width: 2px;
}

.faq__item.is-open .faq__icon::after {
  transform: rotate(90deg);
  opacity: 0;
}

.faq__answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--duration-base) var(--ease-out);
  font-family: var(--font-corps);
  color: var(--texte-secondaire);
}

.faq__answer-inner {
  padding: 0 0 var(--space-md);
  font-size: var(--fs-body);
  line-height: 1.7;
}

.faq__item.is-open .faq__answer {
  max-height: 800px;
}