/* Variables de couleurs */
:root {
  --black: #000000;
  --white: #ffffff;
  --dark-brown: #3E2723;
  --light-brown: #5D4037;
  --gray-light: #f5f5f5;
  --shadow: rgba(0, 0, 0, 0.1);
  --font: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  
  /* Variables pour le mode sombre */
  --dark-bg: #0d0d0d;
  --light-text: #f2f2f2;
  --accent-brown: #c7a17a;
}

/* Reset de base */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: var(--font);
  line-height: 1.6;
  color: var(--dark-brown);
  background-color: var(--white);
}

/* Container principal */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.container-formation {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  text-align: center;
}

.container-formation h1 {
  color: var(--dark-brown);
  margin: 2rem 0;
  font-size: clamp(2rem, 4vw, 2.5rem);
}

/* Header & Navigation */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: linear-gradient(135deg, var(--black) 0%, var(--dark-brown) 100%);
  color: var(--white);
  padding: 1rem 0;
  box-shadow: 0 2px 10px var(--shadow);
}

.site-header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  height: 50px;
  width: auto;
  object-fit: contain;
}

.nav {
  display: flex;
  list-style: none;
  gap: 2rem;
  align-items: center;
}

.nav a {
  color: var(--white);
  text-decoration: none;
  font-weight: 500;
  padding: 0.75rem 1rem;
  border-radius: 6px;
  transition: all 0.3s ease;
  text-align: center;
}

.nav a:hover,
.nav a.active {
  background: rgba(255, 255, 255, 0.15);
  transform: translateY(-2px);
}

/* Burger Menu */
.burger {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.burger span {
  width: 24px;
  height: 3px;
  background: var(--white);
  transition: transform 0.3s ease, opacity 0.3s ease;
}

/* Animation burger → croix */
.burger.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.burger.open span:nth-child(2) {
  opacity: 0;
}

.burger.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Section Hero */
.hero {
  min-height: 70vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: white;
  position: relative;
  background-attachment: fixed;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.4);
  z-index: 1;
}

.hero-text {
  position: relative;
  z-index: 2;
}

.hero h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
  margin: 2rem 0;
  font-weight: 700;
  color: var(--dark-brown);
  text-shadow:
    -1px -1px 0 #ffffff,
     1px -1px 0 #ffffff,
    -1px  1px 0 #ffffff,
     1px  1px 0 #ffffff;
}

.slogan {
  font-size: clamp(1.2rem, 2.5vw, 1.5rem);
  margin-bottom: 2rem;
  opacity: 0.9;
}

/* Boutons */
.btn-primary,
.btn-secondary {
  display: inline-block;
  padding: 12px 30px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
  text-align: center;
  transition: all 0.3s ease;
  border: none;
  cursor: pointer;
  font-size: 1rem;
  margin: 0 auto;
}

.btn-primary {
  background: linear-gradient(135deg, var(--dark-brown), var(--light-brown));
  color: var(--white);
  box-shadow: 0 4px 15px rgba(62, 39, 35, 0.3);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(62, 39, 35, 0.4);
}

.btn-secondary {
  background: var(--white);
  color: var(--dark-brown);
  border: 2px solid var(--dark-brown);
}

.btn-secondary:hover {
  background: var(--dark-brown);
  color: var(--white);
  transform: translateY(-2px);
}

/* Sections principales */
.intro,
.features {
  padding: 4rem 0;
  text-align: center;
}

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

.intro h2,
.features h2 {
  font-size: clamp(2rem, 4vw, 2.5rem);
  margin-bottom: 1.5rem;
  color: var(--dark-brown);
  text-align: center;
}

.intro p {
  font-size: clamp(1.1rem, 2vw, 1.3rem);
  max-width: 600px;
  margin: 0 auto;
  color: var(--light-brown);
  text-align: center;
}

.features p {
  text-align: center;
}

/* Grille des fonctionnalités */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  list-style: none;
  margin: 2rem auto;
  justify-items: center;
  max-width: 1000px;
}

.features-grid.tight {
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5rem;
}

.features-grid li {
  background: var(--white);
  padding: 2rem;
  border-radius: 10px;
  text-align: center;
  box-shadow: 0 5px 15px var(--shadow);
  font-weight: 600;
  color: var(--dark-brown);
  transition: transform 0.3s ease;
  width: 100%;
  max-width: 300px;
}

.features-grid li:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 25px rgba(62, 39, 35, 0.2);
}

/* Page Formations */
.formations-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin: 2rem auto;
  justify-items: center;
  max-width: 1200px;
}

.formations-grid article {
  background: var(--white);
  padding: 2rem;
  border-radius: 15px;
  box-shadow: 0 5px 20px var(--shadow);
  transition: all 0.3s ease;
  text-align: center;
  width: 100%;
  max-width: 350px;
  border: 1px solid var(--gray-light);
}

.formations-grid article:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(62, 39, 35, 0.15);
}

.formations-grid h2 {
  color: var(--dark-brown);
  margin-bottom: 1rem;
  font-size: 1.5rem;
  text-align: center;
}

.formations-grid p {
  color: var(--light-brown);
  line-height: 1.8;
  text-align: center;
}

/* Boutons groupés */
.cta-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
  margin: 3rem auto;
  flex-wrap: wrap;
  max-width: 500px;
}

.btn-group-centered {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 20px;
  margin: 2rem auto;
  flex-wrap: wrap;
  max-width: 500px;
}

/* Page Contact */
main h1 {
  text-align: center;
  color: var(--dark-brown);
  text-shadow:
    -1px -1px 0 #ffffff,
     1px -1px 0 #ffffff,
    -1px  1px 0 #ffffff,
     1px  1px 0 #ffffff;
  margin: 2rem 0;
  font-size: clamp(2rem, 4vw, 2.5rem);
}

.contact-form {
  background: var(--white);
  padding: 2rem;
  border-radius: 15px;
  box-shadow: 0 5px 20px var(--shadow);
  margin: 2rem auto;
  max-width: 600px;
  border: 1px solid var(--gray-light);
}

.contact-form form {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.contact-form label {
  font-weight: 600;
  color: var(--dark-brown);
  margin-bottom: 0.5rem;
}

.contact-form input,
.contact-form textarea {
  padding: 12px 15px;
  border: 2px solid var(--gray-light);
  border-radius: 8px;
  font-size: 1rem;
  transition: border-color 0.3s ease;
  font-family: inherit;
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--dark-brown);
  box-shadow: 0 0 0 3px rgba(62, 39, 35, 0.1);
}

.contact-form textarea {
  resize: vertical;
  min-height: 120px;
}

.contact-form button {
  margin: 1rem auto 0;
  width: fit-content;
}

/* Section Créateurs */
.about-creators {
  margin: 4rem 0;
  text-align: center;
}

.about-creators h2 {
  font-size: clamp(2rem, 4vw, 2.5rem);
  color: var(--dark-brown);
  margin-bottom: 3rem;
}

.creators-grid {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 3rem;
  flex-wrap: wrap;
  max-width: 800px;
  margin: 0 auto;
}

.creators-grid figure {
  text-align: center;
  background: var(--white);
  padding: 2rem;
  border-radius: 20px;
  box-shadow: 0 10px 30px var(--shadow);
  transition: transform 0.3s ease;
  flex: 1;
  min-width: 250px;
  max-width: 350px;
  border: 1px solid var(--gray-light);
}

.creators-grid figure:hover {
  transform: translateY(-10px);
  box-shadow: 0 15px 40px rgba(62, 39, 35, 0.2);
}

.creators-grid img {
  width: 200px;
  height: 200px;
  border-radius: 50%;
  object-fit: cover;
  object-position: center;
  border: 5px solid var(--dark-brown);
  margin-bottom: 1.5rem;
  transition: transform 0.3s ease;
}

.creators-grid img:hover {
  transform: scale(1.05);
}

.creators-grid figcaption {
  font-size: 1.1rem;
  color: var(--light-brown);
}

.creators-grid strong {
  display: block;
  font-size: 1.3rem;
  margin-bottom: 0.5rem;
  color: var(--dark-brown);
}

/* Page Tarifs */
main section ul {
  background: var(--white);
  padding: 2rem;
  border-radius: 15px;
  box-shadow: 0 5px 20px var(--shadow);
  max-width: 600px;
  margin: 2rem auto;
  list-style: none;
  border: 1px solid var(--gray-light);
}

main section ul li {
  padding: 1rem 0;
  border-bottom: 1px solid var(--gray-light);
  font-size: 1.1rem;
  color: var(--light-brown);
  text-align: center;
  font-weight: 500;
}

main section ul li:last-child {
  border-bottom: none;
}

/* Footer */
.site-footer {
  background: linear-gradient(135deg, var(--black) 0%, var(--dark-brown) 100%);
  color: var(--white);
  text-align: center;
  padding: 2rem 0;
  margin-top: 4rem;
}

/* Animations */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.contact-form,
.creators-grid figure,
.formations-grid article {
  animation: fadeInUp 0.6s ease-out;
}

/* Améliorations d'accessibilité */
:focus {
  outline: 2px solid #2a5298;
  outline-offset: 2px;
}

/* RESPONSIVE DESIGN */
/* Mobile ≤ 768px */
@media (max-width: 768px) {
  .burger {
    display: flex;
  }
  
  .nav {
    position: fixed;
    inset: 0 0 0 30%;
    flex-direction: column;
    padding-top: 6rem;
    background: rgba(0, 0, 0, 0.9);
    transform: translateX(100%);
    transition: transform 0.4s ease;
    gap: 0;
  }
  
  .nav.open {
    transform: translateX(0);
  }
  
  .nav a {
    padding: 1rem 2rem;
    font-size: 1.25rem;
    width: 100%;
    display: block;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  }
  
  .hero {
    min-height: 60vh;
    background-attachment: scroll;
  }
  
  .creators-grid {
    gap: 2rem;
    flex-direction: column;
  }
  
  .creators-grid figure {
    min-width: auto;
    width: 100%;
    max-width: 400px;
  }
  
  .creators-grid img {
    width: 150px;
    height: 150px;
  }
  
  .cta-buttons {
    flex-direction: column;
    align-items: center;
  }
  
  .cta-buttons .btn-secondary {
    width: 250px;
  }
  
  .formations-grid {
    grid-template-columns: 1fr;
  }
  
  .features-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  
  .features-grid li {
    padding: 1.5rem;
  }
}

/* Très petit mobile ≤ 480px */
@media (max-width: 480px) {
  .container,
  .container-formation {
    padding: 0 15px;
  }
  
  .contact-form {
    padding: 1.5rem;
    margin: 1rem 0;
  }
  
  .creators-grid {
    gap: 1.5rem;
  }
  
  .creators-grid figure {
    padding: 1.5rem;
  }
  
  .creators-grid img {
    width: 120px;
    height: 120px;
  }
  
  .hero {
    min-height: 50vh;
  }
  
  .intro,
  .features {
    padding: 2rem 0;
  }
}

/* MODE SOMBRE OPTIMISÉ */
@media (prefers-color-scheme: dark) {
  body {
    background: var(--dark-bg);
    color: var(--light-text);
  }
  
  a, .nav a {
    color: var(--accent-brown);
  }
  
  .nav a:hover,
  .nav a.active {
    background: rgba(199, 161, 122, 0.15);
  }
  
  .contact-form,
  .formations-grid article,
  .creators-grid figure,
  .features-grid li,
  main section ul {
    background: #1a1a1a;
    color: var(--light-text);
    border-color: #333;
  }
  
  .contact-form input,
  .contact-form textarea {
    background: #262626;
    border-color: #555;
    color: var(--light-text);
  }
  
  .contact-form input:focus,
  .contact-form textarea:focus {
    border-color: var(--accent-brown);
    box-shadow: 0 0 0 3px rgba(199, 161, 122, 0.1);
  }
  
  .btn-primary {
    background: var(--accent-brown);
    color: var(--dark-bg);
  }
  
  .btn-primary:hover {
    filter: brightness(1.1);
  }
  
  .btn-secondary {
    background: transparent;
    color: var(--accent-brown);
    border-color: var(--accent-brown);
  }
  
  .btn-secondary:hover {
    background: var(--accent-brown);
    color: var(--dark-bg);
  }
  
  .intro {
    background: #1a1a1a;
  }
  
  .intro h2,
  .features h2,
  .about-creators h2,
  .formations-grid h2,
  .container-formation h1,
  main h1 {
    color: var(--light-text);
  }
  
  .intro p,
  .formations-grid p,
  .creators-grid figcaption,
  main section ul li {
    color: var(--accent-brown);
  }
  
  .creators-grid strong {
    color: var(--light-text);
  }
}

/* Messages de statut */
.message-status {
  margin-top: 1rem;
  padding: 1rem;
  border-radius: 8px;
  font-weight: 500;
  text-align: center;
  animation: slideIn 0.3s ease;
}

.message-status.success {
  background-color: #d4edda;
  color: #155724;
  border: 1px solid #c3e6cb;
}

.message-status.error {
  background-color: #f8d7da;
  color: #721c24;
  border: 1px solid #f5c6cb;
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Mode sombre pour les messages */
@media (prefers-color-scheme: dark) {
  .message-status.success {
    background-color: #1e4d2b;
    color: #a3d9a5;
    border-color: #2d5a35;
  }
  
  .message-status.error {
    background-color: #4d1e24;
    color: #d9a3a8;
    border-color: #5a2d35;
  }
}