/* ===== STYLES COMMUNS À TOUT LE SITE ===== */
:root {
  /* Colors */
  --primary-color: #4f46e5;
  --accent-color: #f59e0b;
  --white: #ffffff;
  --warm-white: #fdfcf9; /* Teinte beige plus chaude */
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;

  /* Typography & Spacing */
  --font-family: 'Inter', sans-serif;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;
  --spacing-4xl: 6rem;
  
  /* Radius & Shadows */
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.08);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.08);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.08);
  
  --transition-normal: 300ms ease-in-out;
  --container-max-width: 1200px;
  --container-padding: var(--spacing-lg);
}

/* Reset & Base */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-family);
  line-height: 1.7;
  color: var(--gray-700);
  background-color: var(--warm-white); /* Fond beige appliqué */
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
.container { max-width: var(--container-max-width); margin: 0 auto; padding: 0 var(--container-padding); }

/* Header & Navigation */
.header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: rgba(253, 252, 249, 0.85); /* Fond du header assorti */
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--gray-200);
}
.nav { display: flex; align-items: center; justify-content: space-between; padding: var(--spacing-md) 0; height: 70px; }
.nav__logo { display: flex; align-items: center; gap: 0.75rem; }
.nav__logo-img { width: 45px; height: 45px; border-radius: 50%; object-fit: cover; }
.nav__logo-text { font-weight: 700; font-size: 1.125rem; color: var(--gray-800); }
.nav__menu { display: flex; align-items: center; gap: var(--spacing-xl); }
.nav__link { font-weight: 500; color: var(--gray-600); transition: color var(--transition-normal); padding: 0.5rem 0; }
.nav__link:hover, .nav__link--active { color: var(--primary-color); }
.nav__language { display: flex; gap: 0.25rem; }
.language-btn { background: none; border: 2px solid var(--gray-300); color: var(--gray-600); padding: 0.25rem 0.5rem; border-radius: var(--radius-md); font-size: 0.875rem; font-weight: 500; cursor: pointer; transition: var(--transition-normal); }
.language-btn:hover { border-color: var(--primary-color); }
.language-btn--active { background-color: var(--primary-color); border-color: var(--primary-color); color: var(--white); }
.nav__toggle { display: none; }

/* Sections & Cards */
.section { padding: var(--spacing-4xl) 0; position: relative; }
.section--alt { background-color: rgba(255,255,255,0.5); border-top: 1px solid var(--gray-200); border-bottom: 1px solid var(--gray-200); }
.section__header { text-align: center; margin-bottom: var(--spacing-3xl); position: relative; }
.section__title { font-size: clamp(1.8rem, 4vw, 2.5rem); font-weight: 700; color: var(--gray-900); margin-bottom: var(--spacing-md); }
.section__title::before {
  content: '';
  position: absolute;
  top: -2.5rem;
  left: 50%;
  transform: translateX(-50%);
  font-size: 1.8rem;
  animation: sparkle 4s ease-in-out infinite;
}
.section__subtitle { font-size: 1.1rem; color: var(--gray-600); max-width: 600px; margin: 0 auto; }
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: var(--spacing-2xl); }
.card {
  background: var(--white); padding: var(--spacing-xl); border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-lg); text-align: center; transition: all var(--transition-normal);
  border: 1px solid var(--gray-200); position: relative; overflow: hidden;
  animation: float 8s ease-in-out infinite;
}
.card:nth-child(2) { animation-delay: -2.5s; }
.card:nth-child(3) { animation-delay: -5s; }
.card:hover { transform: translateY(-10px); box-shadow: var(--shadow-xl); animation-play-state: paused; }
.card__icon { font-size: 2.5rem; margin-bottom: var(--spacing-lg); }
.card__avatar { width: 100px; height: 100px; border-radius: 50%; object-fit: cover; margin: 0 auto var(--spacing-lg); border: 4px solid var(--gray-200); }
.card__title { font-size: 1.25rem; font-weight: 600; color: var(--gray-900); margin-bottom: 0.5rem; }
.card__role { color: var(--primary-color); font-weight: 600; margin-bottom: var(--spacing-md); }
.card__text { color: var(--gray-600); line-height: 1.6; margin-bottom: var(--spacing-lg); }

/* Buttons & Footer */
.btn { display: inline-block; padding: 0.75rem 1.5rem; border-radius: var(--radius-lg); font-weight: 600; transition: transform 0.2s, box-shadow 0.2s; cursor: pointer; text-align: center; border: none; }
.btn--primary { background: var(--primary-color); color: var(--white); }
.btn:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
.footer { background: var(--gray-800); color: var(--gray-300); padding: var(--spacing-3xl) 0; }
.footer__content { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: var(--spacing-2xl); text-align: center; }
.footer__title { font-size: 1.1rem; font-weight: 600; margin-bottom: var(--spacing-md); color: var(--white); }
.footer__link { color: #a5b4fc; text-decoration: underline; }
.footer__bottom { text-align: center; padding-top: var(--spacing-2xl); border-top: 1px solid var(--gray-700); color: var(--gray-500); margin-top: var(--spacing-2xl); }

/* Animations Keyframes */
@keyframes float { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-15px); } }
@keyframes sparkle { 0%, 100% { opacity: 0.5; transform: translateX(-50%) scale(1); } 50% { opacity: 1; transform: translateX(-50%) scale(1.2); } }

/* Responsive */
@media (max-width: 768px) {
  .nav__menu { 
    position: fixed; top: 70px; left: 0; right: 0; 
    background: var(--warm-white);
    flex-direction: column; padding: var(--spacing-xl); 
    box-shadow: var(--shadow-xl);
    transform: translateY(-120%); transition: transform var(--transition-normal);
    gap: var(--spacing-lg);
  }
  .nav__menu.active { transform: translateY(0); }
  .nav__toggle { display: flex; flex-direction: column; gap: 5px; cursor: pointer; z-index: 1001; }
  .nav__toggle span { width: 25px; height: 3px; background: var(--gray-700); border-radius: 2px; transition: all var(--transition-normal); }
  .nav__toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
  .nav__toggle.active span:nth-child(2) { opacity: 0; }
  .nav__toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(7px, -7px); }
  .footer__content { grid-template-columns: 1fr; }
}