/* ============================
   LAYOUT - Structure générale
   ============================ */

/* Container */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

/* Header */
header {
  background-color: var(--white);
  padding: var(--space-sm) 0;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
}

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

.logo {
  width: 60px;
  height: 56px;
  height: auto;
}

.logo-container {
  font-size: var(--size-3xl);
  font-family: var(--font-heading);
  font-weight: var(--weight-bold);
  color: var(--primary-green);
  display: flex;
  align-items: center;
  gap: 2rem;
}

@media (max-width: 768px) {
  .logo-container {
    gap: 15px;
  }
  .logo {
    width: 40px;
  }

}

nav ul {
  display: flex;
  list-style: none;
  gap: var(--space-lg);
}

nav a {
  font-size: var(--size-sm);
  font-weight: var(--weight-medium);
  color: var(--gray-dark);
}

nav a:hover {
  color: var(--primary-green);
  text-decoration: none;
}

/* Hamburger Menu */
.hamburger {
  display: none;
  flex-direction: column;
  background: none;
  border: none;
  cursor: pointer;
  gap: 6px;
  padding: 0;
}

.hamburger span {
  width: 25px;
  height: 3px;
  background-color: var(--gray-dark);
  border-radius: 2px;
  transition: var(--transition);
}

.hamburger.active span:nth-child(1) {
  transform: translateY(9px) rotate(45deg);
}

.hamburger.active span:nth-child(2) {
  opacity: 0;
}

.hamburger.active span:nth-child(3) {
  transform: translateY(-9px) rotate(-45deg);
}

nav.mobile-open {
  display: flex;
}

/* Main Content */
main {
  min-height: calc(100vh - 200px);
}

section {
  padding: var(--section-padding) 0;
  scroll-margin-top: 80px;
}

section:nth-child(even) {
  background-color: var(--off-white);
}

section:nth-child(odd) {
  background-color: var(--white);
}

/* Footer */
footer {
  background: radial-gradient(circle at top left, #255C43 30%, #517E6A 100%);
  color: var(--white);
  padding: var(--space-2xl) 0;
  margin-top: var(--space-3xl);
}

footer .container {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: var(--space-2xl);
}

footer h3 {
  color: var(--white);
  margin-bottom: var(--space-md);
  font-size: var(--size-lg);
}

footer .logo {
  width: 120px;
  margin-bottom: var(--space-md);
}

footer p {
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: var(--space-sm);
}

footer a {
  color: var(--light-green);
}

footer a:hover {
  color: var(--white);
}

.footer-bottom {
  text-align: center;
  padding-top: var(--space-lg);
  margin-top: var(--space-lg);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-size: var(--size-sm);
  color: rgba(255, 255, 255, 0.7);
  grid-column: 1 / -1;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: var(--space-sm) var(--space-lg);
  background-color: var(--primary-green);
  color: var(--white);
  border: 2px solid var(--primary-green);
  border-radius: 4px;
  font-weight: var(--weight-semibold);
  transition: var(--transition);
  text-decoration: none;
}

.btn:hover {
  background-color: var(--secondary-green);
  border-color: var(--secondary-green);
  text-decoration: none;
}

.btn-secondary {
  background-color: transparent;
  color: var(--primary-green);
  border: 2px solid var(--primary-green);
}

.btn-secondary:hover {
  background-color: var(--primary-green);
  color: var(--white);
}

/* Utility Classes */
.text-center {
  text-align: center;
}

.text-white {
  color: var(--white);
}

.text-primary {
  color: var(--primary-green);
}

.mt {
  margin-top: var(--space-lg);
}

.mb {
  margin-bottom: var(--space-lg);
}

/* Grid */
.grid {
  display: grid;
  gap: var(--space-lg);
}

.grid-2 {
  grid-template-columns: repeat(2, 1fr);
}

.grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

/* Flex */
.flex {
  display: flex;
  gap: var(--space-lg);
}

.flex-center {
  display: flex;
  justify-content: center;
  align-items: center;
}

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

/* ============================
   RESPONSIVE - Layout
   ============================ */

@media (max-width: 768px) {
  :root {
    --size-4xl: 2.5rem;
    --size-3xl: 2rem;
    --size-2xl: 1.5rem;
    --section-padding: var(--space-xl);
  }

  header .container {
    flex-wrap: wrap;
  }

  .hamburger {
    display: flex;
    order: 3;
  }

  nav {
    width: 100%;
    order: 4;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
  }

  nav.mobile-open {
    min-height: 90vh;
    margin-top: var(--space-sm);
    flex-direction: column;
  }
  
  nav ul {
    background: radial-gradient(circle at top left, #255C43 30%, #517E6A 100%);
    border-radius: 8px;
    flex-direction: column;
    gap: 0;
    text-align: center;
    width: 100%;
    padding: 20px;
    display: flex;
    gap: var(--space-lg);
  }

  nav ul li {
    background: white;
    border-radius: 8px;
  }

  nav.mobile-open a {
    display: block;
    padding: var(--space-sm) var(--space-lg);
    font-size: var(--size-base);
    color: var(--gray-dark);
  }

  nav.mobile-open a:hover {
    background-color: var(--off-white);
    color: var(--primary-green);
  }

  footer .container {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }

  footer .logo {
    margin: 0 auto 40px;
  }
}

@media (max-width: 480px) {
  :root {
    --size-4xl: 2rem;
    --size-3xl: 1.5rem;
    --size-2xl: 1.25rem;
    --size-xl: 1.125rem;
    --section-padding: var(--space-lg);
    --space-lg: 1.5rem;
  }

  .container {
    padding: 0 var(--space-md);
  }

  footer h3 {
    font-size: var(--size-base);
  }

  footer .logo {
    max-width: 100px;
  }

  .btn {
    width: 100%;
    text-align: center;
  }
}

@media (min-width: 1200px) {
  .container {
    padding: 0 var(--space-2xl);
  }
}