/* ==========================================================================
   Reset et Variables CSS
   ========================================================================== */

*, *::before, *::after {
  box-sizing: border-box;
}

* {
  margin: 0;
  padding: 0;
}

:root {
  /* Couleurs */
  --color-bg: #ffffff;
  --color-text: #1a1a1a;
  --color-text-light: #6a6a6a;
  --color-accent: #2c3e50;
  --color-accent-light: #00deff;
  --color-gray-light: #f5f5f5;
  --color-border: #e0e0e0;

  /* Typographie */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-size-base: 1rem;
  --font-size-sm: 0.875rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.5rem;
  --font-size-2xl: 2rem;
  --font-size-3xl: 2.5rem;
  --line-height: 1.6;

  /* Espacements */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 4rem;

  /* Layout */
  --container-max: 1200px;
  --container-padding: 1.5rem;

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;

  /* Ombres */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.1);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.15);
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: var(--line-height);
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: inherit;
  text-decoration: none;
}

ul, ol {
  list-style: none;
}

button {
  font: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* ==========================================================================
   Utilitaires
   ========================================================================== */

.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ==========================================================================
   Header et Navigation
   ========================================================================== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow var(--transition-normal);
}

.site-header.scrolled {
  box-shadow: var(--shadow-sm);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

.logo {
  display: flex;
  align-items: center;
}

.logo img {
  width: 47px;
  height: 57px;
}

/* Navigation desktop */
.main-nav {
  display: flex;
  align-items: center;
}

.nav-list {
  display: flex;
  gap: var(--space-lg);
}

.nav-list a {
  position: relative;
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text-light);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: var(--space-xs) 0;
  transition: color var(--transition-fast);
}

.nav-list a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-accent-light);
  transition: width var(--transition-normal);
}

.nav-list a:hover,
.nav-list a.active {
  color: var(--color-text);
}

.nav-list a:hover::after,
.nav-list a.active::after {
  width: 100%;
}

/* Bouton hamburger - caché sur desktop */
.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  padding: 10px;
  cursor: pointer;
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-text);
  margin: 5px 0;
  transition: transform var(--transition-normal), opacity var(--transition-normal);
}

/* ==========================================================================
   Responsive Header - Mobile
   ========================================================================== */

@media (max-width: 768px) {
  .menu-toggle {
    display: block;
    z-index: 110;
  }

  .main-nav {
    position: fixed;
    top: 0;
    right: 0;
    width: 100%;
    height: 100vh;
    background-color: var(--color-bg);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    transform: translateX(100%);
    transition: transform var(--transition-normal);
  }

  .nav-open .main-nav {
    transform: translateX(0);
  }

  .nav-list {
    flex-direction: column;
    align-items: center;
    gap: var(--space-xl);
  }

  .nav-list a {
    font-size: var(--font-size-xl);
  }

  /* Animation hamburger en X */
  .nav-open .menu-toggle span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }

  .nav-open .menu-toggle span:nth-child(2) {
    opacity: 0;
  }

  .nav-open .menu-toggle span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
  }

  /* Bloquer le scroll quand menu ouvert */
  body.nav-open {
    overflow: hidden;
  }
}

/* ==========================================================================
   Hero / Bandeau
   ========================================================================== */

.hero {
  padding: var(--space-xl) 0;
  text-align: center;
  border-bottom: 1px solid var(--color-border);
}

.hero h1 {
  font-size: clamp(1.75rem, 5vw, var(--font-size-3xl));
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-xs);
}

.hero h2 {
  font-size: clamp(1rem, 3vw, var(--font-size-lg));
  font-weight: 400;
  color: var(--color-accent-light);
  text-transform: uppercase;
}

/* ==========================================================================
   Sections de contenu
   ========================================================================== */

.section {
  padding: var(--space-xl) 0;
}

.section-gray {
  background-color: var(--color-gray-light);
}

.section h2 {
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--color-accent-light);
  text-transform: uppercase;
  margin-bottom: var(--space-lg);
  padding-top: var(--space-md);
  border-top: 1px solid var(--color-border);
}

.section-gray h2 {
  border-top: none;
  padding-top: 0;
}

/* Layout deux colonnes */
.content-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  align-items: start;
}

.content-grid.reverse {
  direction: rtl;
}

.content-grid.reverse > * {
  direction: ltr;
}

.content-text {
  font-size: var(--font-size-base);
  color: var(--color-text-light);
}

.content-text p {
  margin-bottom: var(--space-md);
}

.content-text strong {
  color: var(--color-text);
}

.content-text ul {
  margin-top: var(--space-sm);
}

.content-text li {
  position: relative;
  padding-left: var(--space-lg);
  margin-bottom: var(--space-sm);
}

.content-text li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.5em;
  width: 8px;
  height: 8px;
  background-color: var(--color-accent-light);
  border-radius: 50%;
}

.content-image img {
  border-radius: 4px;
  box-shadow: var(--shadow-md);
}

/* Liste de services (deux colonnes) */
.services-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md) var(--space-xl);
}

.services-grid li {
  position: relative;
  padding-left: 40px;
  font-size: var(--font-size-base);
  color: var(--color-text-light);
  font-style: italic;
}

.services-grid li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  width: 28px;
  height: 28px;
  background-image: url('../img/bouee32.png');
  background-size: contain;
  background-repeat: no-repeat;
}

/* ==========================================================================
   Responsive Sections
   ========================================================================== */

@media (max-width: 768px) {
  .content-grid {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }

  .content-grid.reverse {
    direction: ltr;
  }

  .content-image {
    order: -1;
  }

  .services-grid {
    grid-template-columns: 1fr;
  }
}

/* ==========================================================================
   Galerie de projets (page Chantiers)
   ========================================================================== */

.project-nav {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  justify-content: center;
  padding: var(--space-md) 0;
  border-bottom: 1px solid var(--color-border);
  border-top: 1px solid var(--color-border);
  background-color: var(--color-bg);
}

.project-nav a {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  padding: var(--space-xs) var(--space-sm);
  border-radius: 4px;
  transition: all var(--transition-fast);
}

.project-nav a:hover {
  color: var(--color-text);
  background-color: var(--color-gray-light);
}

/* Projet individuel */
.project {
  padding: var(--space-xl) 0;
}

.project h2 {
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--color-accent-light);
  text-transform: uppercase;
  margin-bottom: var(--space-lg);
  padding-top: var(--space-md);
  border-top: 1px solid var(--color-border);
}

.project-gray {
  background-color: var(--color-gray-light);
}

.project-gray h2 {
  border-top: none;
  padding-top: 0;
}

/* Sous-section de projet */
.project-subsection {
  margin-bottom: var(--space-xl);
}

.project-subsection:last-child {
  margin-bottom: 0;
}

.project-subsection h3 {
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-xs);
}

.project-subsection p {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  font-style: italic;
  margin-bottom: var(--space-md);
}

/* Grille d'images */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-sm);
}

.gallery-item {
  position: relative;
  aspect-ratio: 1;
  overflow: hidden;
  border-radius: 4px;
  cursor: pointer;
}

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-normal);
}

.gallery-item:hover img {
  transform: scale(1.05);
}

.gallery-item::after {
  content: '';
  position: absolute;
  inset: 0;
  background-color: rgba(0,0,0,0);
  transition: background-color var(--transition-normal);
}

.gallery-item:hover::after {
  background-color: rgba(0,0,0,0.1);
}

/* Layout projets deux colonnes */
.project-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
}

/* ==========================================================================
   Responsive Galerie
   ========================================================================== */

@media (max-width: 1024px) {
  .gallery-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 768px) {
  .gallery-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .project-columns {
    grid-template-columns: 1fr;
  }

  .project-nav {
    gap: var(--space-xs);
  }

  .project-nav a {
    font-size: 0.75rem;
  }
}

/* ==========================================================================
   Lightbox
   ========================================================================== */

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 1000;
  background-color: rgba(0, 0, 0, 0.95);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-normal), visibility var(--transition-normal);
}

.lightbox.active {
  opacity: 1;
  visibility: visible;
}

.lightbox-image {
  max-width: 90vw;
  max-height: 90vh;
  object-fit: contain;
  transform: scale(0.95);
  transition: transform var(--transition-normal);
}

.lightbox.active .lightbox-image {
  transform: scale(1);
}

.lightbox-close,
.lightbox-prev,
.lightbox-next {
  position: absolute;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 2rem;
  background-color: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  transition: background-color var(--transition-fast);
}

.lightbox-close:hover,
.lightbox-prev:hover,
.lightbox-next:hover {
  background-color: rgba(255, 255, 255, 0.2);
}

.lightbox-close {
  top: var(--space-md);
  right: var(--space-md);
}

.lightbox-prev {
  left: var(--space-md);
  top: 50%;
  transform: translateY(-50%);
}

.lightbox-next {
  right: var(--space-md);
  top: 50%;
  transform: translateY(-50%);
}

/* Masquer les boutons prev/next sur mobile petit écran */
@media (max-width: 480px) {
  .lightbox-prev,
  .lightbox-next {
    display: none;
  }
}

/* ==========================================================================
   Footer
   ========================================================================== */

.site-footer {
  background-color: var(--color-gray-light);
  padding-top: var(--space-2xl);
}

.footer-main {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: var(--space-xl);
  padding-bottom: var(--space-xl);
}

.footer-seo h3 {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text-light);
  margin-bottom: var(--space-xs);
}

.footer-contact h3 {
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-md);
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
}

.contact-item svg {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  color: var(--color-accent-light);
}

.contact-item a {
  color: var(--color-text-light);
  transition: color var(--transition-fast);
}

.contact-item a:hover {
  color: var(--color-accent);
}

.footer-cta {
  display: flex;
  justify-content: flex-end;
  align-items: flex-start;
}

.btn-cta {
  display: inline-block;
  padding: var(--space-sm) var(--space-lg);
  background-color: var(--color-accent);
  color: white;
  font-weight: 500;
  border-radius: 4px;
  transition: background-color var(--transition-fast);
}

.btn-cta:hover {
  background-color: var(--color-text);
}

/* Footer bottom */
.footer-bottom {
  background-color: #2a2a2a;
  padding: var(--space-md) 0;
}

.footer-bottom-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-bottom p,
.footer-bottom a {
  font-size: var(--font-size-sm);
  color: #a0a0a0;
}

.footer-bottom a:hover {
  color: white;
}

.footer-bottom-nav {
  display: flex;
  gap: var(--space-lg);
}

/* ==========================================================================
   Responsive Footer
   ========================================================================== */

@media (max-width: 768px) {
  .footer-main {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }

  .footer-seo {
    display: none;
  }

  .footer-cta {
    justify-content: center;
  }

  .footer-bottom-inner {
    flex-direction: column;
    gap: var(--space-md);
    text-align: center;
  }

  .footer-bottom-nav {
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-sm) var(--space-md);
  }
}