/* =========================================================
   LAYOUT.CSS : Header + Footer + Sections + Hero
   ========================================================= */

/* =========================================================
   HEADER
   ========================================================= */

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  overflow: visible;

  background: var(--header-hero-bg);
  backdrop-filter: blur(10px);

  --logo-text-color: var(--logo-on-dark);
  --nav-text: var(--nav-on-dark);
  --nav-text-hover: var(--nav-on-dark-hover);
  --nav-text-active: var(--nav-on-dark-active);

  transition: background 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}

.site-header .container,
.site-footer .container {
  max-width: none;
  width: 100%;
  padding-left: var(--padding-container-x);
  padding-right: var(--padding-container-x);
}

.header-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--stack-3);
}

.has-hero .site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: transparent;
  backdrop-filter: none;
}

.has-hero .site-header.is-top,
.has-hero .site-header.is-hero {
  --logo-text-color: var(--logo-on-dark);
  --nav-text: var(--nav-on-dark);
  --nav-text-hover: var(--nav-on-dark-hover);
}

.has-hero .site-header.is-top {
  background: transparent;
  backdrop-filter: none;
  --nav-text-active: var(--white);
}

.has-hero .site-header.is-hero {
  background: var(--header-hero-bg);
  backdrop-filter: blur(10px);
  --nav-text-active: var(--nav-on-dark-active);
}

.site-header.is-scrolled {
  background: var(--header-scroll-bg);
  border-bottom: 1px solid var(--header-scroll-border);
  box-shadow: var(--shadow-header-scrolled);
  backdrop-filter: blur(6px);
  --logo-text-color: var(--logo-on-light);
  --nav-text: var(--nav-on-light);
  --nav-text-hover: var(--accent-strong);
  --nav-text-active: var(--ink);
}

/* =========================================================
   BRAND + NAV
   ========================================================= */

.brand {
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  max-width: 360px;
}

.brand .brand-logo,
.brand svg.logo {
  height: 42px;
  width: auto;
  display: block;
}

.brand-tagline {
  font-size: var(--text-sm);
  color: var(--muted);
}

.nav {
  display: flex;
  gap: var(--stack-1);
  margin-left: auto;
  flex-wrap: wrap;
  justify-content: flex-end;
}

@media (max-width: 768px) {
  .header-row {
    position: relative !important;
    z-index: 10000 !important;
  }
}

.nav-link {
  text-decoration: none;
  font-weight: 600;
  color: var(--nav-text);
  opacity: 0.85;
}

.nav-link:hover {
  opacity: 1;
  color: var(--nav-text-hover);
}

.nav-link.active {
  color: var(--nav-text-active);
}

/* =========================================================
   MOBILE MENU HAMBURGER
   ========================================================= */

.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  z-index: 100;
  position: relative;
}

.hamburger-icon {
  display: flex;
  flex-direction: column;
  gap: 4px;
  width: 24px;
  height: 18px;
}

.hamburger-icon span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--nav-text);
  transition: transform 0.3s ease, opacity 0.3s ease;
  border-radius: 2px;
}

.mobile-menu-toggle[aria-expanded="true"] .hamburger-icon span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.mobile-menu-toggle[aria-expanded="true"] .hamburger-icon span:nth-child(2) {
  opacity: 0;
}

.mobile-menu-toggle[aria-expanded="true"] .hamburger-icon span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

/* =========================================================
   RESPONSIVE MOBILE : HEADER
   ========================================================= */

@media (max-width: 768px) {
  .mobile-menu-toggle {
    display: block !important;
    position: relative !important;
    z-index: 10001 !important;
  }

  .nav {
    display: flex !important;
    flex-direction: column !important;
    flex-wrap: nowrap !important;
    justify-content: center !important;
    align-items: center !important;
    gap: var(--stack-3) !important;
    margin-left: 0 !important;
    margin-right: 0 !important;
    margin-top: 0 !important;
    margin-bottom: 0 !important;
    padding: 0 !important;
    position: static !important;
    width: 100% !important;
    height: auto !important;
    max-width: none !important;
    max-height: none !important;
    background: transparent !important;
    backdrop-filter: none !important;
    -webkit-backdrop-filter: none !important;
    z-index: auto !important;
  }

  .js-enabled .nav {
    position: fixed !important;
    top: 0 !important;
    left: 0 !important;
    right: 0 !important;
    bottom: 0 !important;
    width: 100vw !important;
    height: 100vh !important;
    max-width: none !important;
    max-height: none !important;
    background: rgba(10, 10, 20, 0.95) !important;
    backdrop-filter: blur(20px) !important;
    -webkit-backdrop-filter: blur(20px) !important;
    transition: opacity 0.3s ease, visibility 0.3s ease;
    z-index: 9999 !important;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
  }

  .site-header.is-menu-open .nav {
    opacity: 1 !important;
    visibility: visible !important;
    pointer-events: auto !important;
  }

  .nav-link {
    font-size: var(--text-xl) !important;
    padding: 1rem 2rem !important;
    color: white !important;
    opacity: 0.9 !important;
    text-align: center !important;
    display: block !important;
    width: auto !important;
  }

  .nav-link:hover,
  .nav-link.active {
    color: white !important;
    opacity: 1 !important;
  }

  .site-header {
    position: sticky !important;
    z-index: 10000 !important;
  }

  .site-header.is-menu-open .mobile-menu-toggle {
    position: fixed !important;
    top: 1rem !important;
    right: 1rem !important;
  }

  .hamburger-icon span {
    background: var(--nav-text) !important;
  }

  .site-header.is-scrolled .hamburger-icon span {
    background: var(--ink) !important;
  }

  .site-header.is-top .hamburger-icon span,
  .site-header.is-hero .hamburger-icon span {
    background: white !important;
  }

  .site-header.is-menu-open .hamburger-icon span {
    background: white !important;
  }
}

/* =========================================================
   ICÔNES SOCIALES DANS LE HEADER (mobile uniquement)
   ========================================================= */

.header-social {
  display: none;
}

@media (max-width: 768px) {
  .header-social {
    display: flex;
    gap: var(--stack-2);
    align-items: center;
  }

  .js-enabled .header-social {
    display: none;
    position: fixed;
    bottom: 1rem;
    right: 1rem;
    z-index: 9999;
  }

  .js-enabled .site-header.is-menu-open .header-social {
    display: flex;
  }

  .social-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 56px;
    min-height: 56px;
    padding: 0.75rem;
    color: var(--nav-text);
    text-decoration: none;
    transition: color 0.2s ease;
  }

  .social-link:hover {
    color: var(--nav-text-hover);
  }

  .social-link svg {
    width: 32px;
    height: 32px;
  }
}

/* =========================================================
   FOOTER
   ========================================================= */

.site-footer {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 10;
  padding: 1rem 0;

  background: var(--header-hero-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);

  border-top: 1px solid rgba(var(--c-white), 0.08);
  box-shadow: 0 -4px 16px rgba(var(--c-black), 0.1);

  --footer-text: var(--nav-on-dark);
  color: var(--footer-text);

  transition: background 0.25s ease, border-color 0.25s ease, color 0.25s ease;
}

@media (max-width: 768px) {
  .site-footer {
    position: static;
    background: var(--header-scroll-bg);
    backdrop-filter: none;
    border-top: 1px solid var(--header-scroll-border);
    box-shadow: none;
    color: var(--nav-on-light);
    padding: 1.5rem 0;
  }
}

.has-hero .site-footer.is-top,
.has-hero .site-footer.is-hero {
  --footer-text: var(--nav-on-dark);
}

.has-hero .site-footer.is-top {
  background: transparent;
  backdrop-filter: none;
  border-top-color: rgba(var(--c-white), 0.05);
}

.has-hero .site-footer.is-hero {
  background: var(--header-hero-bg);
  backdrop-filter: blur(10px);
  border-top-color: rgba(var(--c-white), 0.08);
}

.site-footer.is-scrolled {
  background: var(--header-scroll-bg);
  backdrop-filter: blur(6px);
  border-top-color: var(--header-scroll-border);
  box-shadow: 0 -4px 16px rgba(var(--c-black), 0.15);
  --footer-text: var(--nav-on-light);
}

.footer-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--stack-1);
  flex-wrap: wrap;
  font-size: var(--text-sm);
}

.footer-left {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  flex-wrap: wrap;
}

.footer-links {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.link-icon {
  display: none;
}

.link-full {
  display: inline;
}

.link-icon svg {
  vertical-align: middle;
  display: inline-block;
}

.copyright {
  white-space: nowrap;
}

.footer-links a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  min-height: 44px;
  padding: 0.5rem;
  margin: -0.5rem;
}

@media (max-width: 768px) {
  .footer-row {
    justify-content: center;
    font-size: var(--text-xs);
  }

  .footer-links {
    display: none;
  }
}

/* =========================================================
   SCROLL SNAP
   ========================================================= */

.snap-item {
  scroll-snap-align: start;
  scroll-snap-stop: always;
  scroll-margin-bottom: 25svh;
}

.snap-item .section,
.snap-item .hero {
  scroll-snap-align: none;
}

/* =========================================================
   SECTIONS
   ========================================================= */

.section {
  background: var(--paper);
  padding-block: var(--section-pad-y);
  margin: 0 auto;
  box-shadow: none;
  border: none;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.section + .section {
  margin-top: 0;
}

.hero-band .section {
  background: transparent;
}

.section-major {
  margin-top: clamp(80px, 10vh, 120px);
}

/* =========================================================
   TYPOGRAPHIE HELPERS (sections)
   ========================================================= */

.eyebrow {
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  color: var(--accent-strong);
  font-weight: 700;
  margin: 0 0 var(--stack-2);
}

.lead {
  color: var(--muted);
  font-size: var(--text-lead);
  line-height: 1.7;
  margin-bottom: var(--stack-3);
}

.section-title {
  margin-bottom: var(--stack-3);
}

.section-title h2 {
  margin-bottom: var(--stack-2);
}

.section-title-row {
  display: flex;
  flex-direction: column;
  gap: var(--stack-2);
}

@media (min-width: 640px) {
  .section-title-row {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

.section-title-row h2 {
  margin-bottom: 0;
  flex: 1;
  min-width: 0;
}

.content-group {
  margin-bottom: var(--stack-3);
}

.content-group > * + * {
  margin-top: var(--stack-2);
}

.content-group h3 {
  margin-top: var(--stack-3);
}

.content-group h3:first-child {
  margin-top: 0;
}

/* =========================================================
   HERO BAND
   ========================================================= */

.hero-band {
  position: relative;
  background: var(--hero-band-bg);
  background-attachment: fixed;
  background-position: center top;
  overflow: hidden;
}

.hero-band::after {
  content: "";
  position: absolute;
  inset: 0;
  background: url("/assets/images/pcb-pattern.svg") center / cover no-repeat;
  background-attachment: fixed;
  opacity: 0.08;
  pointer-events: none;
  z-index: 0;
  filter: blur(2px);
  -webkit-filter: blur(2px);
  -webkit-mask-image: linear-gradient(to right, rgba(0, 0, 0, 0) 0%, rgba(0, 0, 0, 1) 45%);
  mask-image: linear-gradient(to right, rgba(0, 0, 0, 0) 0%, rgba(0, 0, 0, 1) 45%);
}

.hero-band::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg,
      rgba(var(--c-black), 0.65) 0%,
      rgba(var(--c-black), 0.55) 50%,
      rgba(var(--c-black), 0.70) 100%);
  pointer-events: none;
  z-index: 0;
}

@media (max-width: 1024px) {
  .hero-band {
    background-attachment: scroll;
    overflow: visible;
  }

  .hero-band::after {
    background: url("/assets/images/pcb-pattern-mobile.svg") center / cover no-repeat;
    background-attachment: scroll;
    opacity: 0.08;
    filter: blur(2px);
    -webkit-filter: blur(2px);
  }
}

/* =========================================================
   PAGE HERO (pages internes)
   ========================================================= */

.page-hero {
  position: relative;
  min-height: clamp(280px, 40vh, 400px);
  display: flex;
  align-items: center;
  padding: calc(var(--header-h) + var(--pad-lg)) 0 var(--pad-lg);
  background: linear-gradient(135deg,
      rgb(var(--c-hero-0)) 0%,
      rgb(var(--c-hero-1)) 100%);
  overflow: hidden;
}

.page-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: url("/assets/images/pcb-pattern.svg") center / cover no-repeat;
  opacity: 0.06;
  pointer-events: none;
  z-index: 0;
  filter: blur(1px);
}

.page-hero .container {
  position: relative;
  z-index: 1;
}

.page-hero-content {
  max-width: 900px;
  margin: 0 auto;
  text-align: center;
}

.page-hero h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  line-height: 1.15;
  margin: 0 0 var(--pad-sm);
  color: var(--white);
  text-shadow: 0 2px 8px rgba(var(--c-black), 0.4);
  font-weight: 800;
}

.page-hero .lead {
  font-size: clamp(1.1rem, 2vw, 1.3rem);
  line-height: 1.5;
  margin: 0 auto;
  color: var(--hero-text);
  font-weight: 600;
  max-width: 750px;
}

/* =========================================================
   HERO (accueil)
   ========================================================= */

.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: calc(var(--header-h) + var(--pad-lg)) 0 clamp(32px, 4vh, 56px);
  background: transparent;
}

.hero-grid {
  display: flex;
  justify-content: flex-start;
  align-items: center;
  position: relative;
  flex: 1;
  width: 100%;
  max-width: none !important;
  padding: 0 var(--padding-container-x);
}

.hero .container {
  max-width: none;
  width: 100%;
  padding: 0;
}

@media (min-width: 1024px) {
  .hero-grid {
    align-items: start;
    padding-top: var(--pad-lg);
    padding-inline: clamp(32px, 4vw, 64px);
  }
}

@media (max-width: 560px) {
  .hero {
    min-height: 100svh;
    padding: calc(var(--header-h) + 32px) 0 24px;
  }
}

.hero-content {
  width: 90vw;
  max-width: none;
  display: flex;
  flex-direction: column;
  gap: var(--stack-3);

  background: rgba(var(--c-hero-0), 0.5);
  backdrop-filter: blur(24px) saturate(150%);
  -webkit-backdrop-filter: blur(24px) saturate(150%);

  padding: clamp(32px, 5vh, 56px) var(--pad-md);
  border-radius: 24px;
  border: 1px solid rgba(var(--c-white), 0.2);

  box-shadow:
    0 8px 32px rgba(var(--c-black), 0.3),
    0 4px 16px rgba(var(--c-black), 0.2),
    inset 0 1px 0 rgba(var(--c-white), 0.1);

  position: relative;
}

@media (min-width: 1024px) {
  .hero-content {
    width: 72vw;
    max-width: none;
  }

  .hero h1 {
    width: 100%;
  }

  .hero .lead {
    width: 75%;
  }

  .hero-actions {
    width: 100%;
  }
}

.hero h1 {
  font-size: clamp(2.8rem, 6vw + 0.5rem, 4.5rem);
  line-height: 1.1;
  margin: 0;
  color: var(--hero-text);
  text-shadow: 0 2px 8px rgba(var(--c-black), 0.3);
  font-weight: 800;
  letter-spacing: -0.02em;
}

.hero .eyebrow {
  color: var(--accent);
  margin: var(--pad-sm) 0 clamp(20px, 3vh, 32px);
}

.hero .lead {
  font-size: clamp(1.25rem, 2.5vw, 1.5rem);
  line-height: 1.4;
  margin: 0;
  color: var(--hero-text);
  font-weight: 600;
  max-width: 45ch;
}

.hero p {
  margin: 0;
  color: var(--hero-text-muted);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--stack-2);
  margin-top: var(--stack-1);
}

@media (max-width: 1023px) {
  .hero-content {
    display: flex;
    flex-direction: column;
    gap: var(--stack-2);
  }

  .hero h1 {
    font-size: clamp(2.2rem, 8vw, 3.2rem);
  }

  .hero-actions {
    justify-content: center;
  }
}