/* ===== Variables globales ===== */
:root {
  /* Couleurs */
  --color-primary: #FF6B35;
  --color-dark: #0A2540;
  --color-light: #F5F7FA;
  --color-text: #2D3748;
  --color-muted: #718096;

  /* Typographie */
  --font-base: "Inter", system-ui, sans-serif;
  --font-size-base: 16px;
  --line-height: 1.6;

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

  /* Animations */
  --transition-fast: 0.2s ease;
  --transition-base: 0.3s ease;
}

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

body {
  font-family: var(--font-base);
  font-size: var(--font-size-base);
  line-height: var(--line-height);
  color: var(--color-text);
  background: var(--color-light);
}

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

ul {
  list-style: none;
}

button {
  cursor: pointer;
  font-family: inherit;
}
/* ===== Header ===== */
.header {
  background: var(--color-dark);
  padding: var(--space-sm) var(--space-md);
}

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

.nav_logo {
  color: var(--color-primary);
  font-size: 1.5rem;
  font-weight: bold;
}

.nav_menu {
  display: flex;
  gap: var(--space-md);
}

.nav_menu a {
  color: white;
}

/* ===== Hero ===== */
.hero {
  padding: var(--space-lg) var(--space-md);
  text-align: center;
  background: linear-gradient(135deg, #0A2540 0%, #1E3A5F 100%);
  color: white;
}

.hero_title {
  font-size: 3rem;
  margin-bottom: var(--space-sm);
}

/* ===== Button ===== */
.btn {
  padding: 0.8rem 2rem;
  border: none;
  border-radius: 8px;
  font-weight: 600;
}

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

/* ===== Card ===== */
.card {
  background: white;
  padding: var(--space-md);
  border-radius: 12px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}
/* ===== Navigation (Flexbox) ===== */
.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav_menu {
  display: flex;
  gap: var(--space-md);
}
/* ===== Features (Grid responsive) ===== */
.features {
  padding: var(--space-lg) var(--space-md);
  max-width: 1200px;
  margin: 0 auto;
}

.features h2 {
  text-align: center;
  font-size: 2.5rem;
  color: var(--color-dark);
  margin-bottom: var(--space-md);
}

.features_grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-md);
}
/* ===== Mobile adjustments ===== */
@media (max-width: 768px) {
  .hero_title {
    font-size: 2rem;
  }

  .nav {
    flex-direction: column;
    gap: var(--space-sm);
  }

  .nav_menu {
    gap: var(--space-sm);
  }
}
/* ===== Transitions ===== */

/* Boutons */
.btn {
  transition:
    transform var(--transition-fast),
    box-shadow var(--transition-fast),
    background var(--transition-fast);
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(255, 107, 53, 0.4);
}

.btn:active {
  transform: translateY(0);
}

/* Cards */
.card {
  transition:
    transform var(--transition-base),
    box-shadow var(--transition-base);
}

.card:hover {
  transform: translateY(-8px);
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.1);
}

/* Liens navigation */
.nav_menu a {
  position: relative;
  transition: color var(--transition-fast);
}

.nav_menu a::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  transition: width var(--transition-base);
}

.nav_menu a:hover::after {
  width: 100%;
}
/* ===== Animations keyframes ===== */

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

.hero_title {
  animation: fadeInUp 0.8s ease-out;
}

.hero_subtitle {
  animation: fadeInUp 0.8s ease-out 0.2s both;
}

.hero .btn {
  animation: fadeInUp 0.8s ease-out 0.4s both;
}

/* Pulsation du bouton principal */
@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}

.btn--primary {
  animation: pulse 2s infinite;
}

.btn--primary:hover {
  animation: none;
}
/* ===== Accessibilité : réduire les animations ===== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}
/* ===== Animation au scroll ===== */
.card {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.card.is-visible {
  opacity: 1;
  transform: translateY(0);
}
/* ===== Stats ===== */
.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-md);
  padding: var(--space-lg) var(--space-md);
  background: var(--color-dark);
  color: white;
  text-align: center;
}

.stat_number {
  display: block;
  font-size: 3rem;
  font-weight: bold;
  color: var(--color-primary);
}