/* ============================================================
   DESIGN SYSTEM – QUIZ DE CARABIN (v2 moderne)
   ============================================================ */
:root {
  /* Palette principale */
  --color-primary: #4361ee;      /* bleu roi */
  --color-primary-dark: #3a56d4;
  --color-secondary: #7209b7;    /* violet */
  --color-accent: #f72585;       /* rose vif */
  --color-success: #06d6a0;
  --color-warning: #ffd166;
  --color-error: #ef476f;
  --color-surface: #ffffff;
  --color-bg: #f8f9fe;
  --color-text: #1e1b4b;
  --color-text-muted: #6b7280;
  --color-border: #e5e7eb;

  /* Typographie */
  --font-family: 'Inter', system-ui, -apple-system, sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  --font-size-5xl: 3rem;

  /* Espacements (grille 4px) */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;

  /* Ombres */
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.03);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.05);
  --shadow-lg: 0 10px 25px rgba(0,0,0,0.08);
  --shadow-xl: 0 20px 50px rgba(0,0,0,0.1);

  /* Bordures */
  --radius-sm: 0.375rem;
  --radius-md: 0.625rem;
  --radius-lg: 0.875rem;
  --radius-xl: 1.25rem;
  --radius-2xl: 1.75rem;

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 250ms ease;
}

/* --- RESET --- */
*, *::before, *::after { margin:0; padding:0; box-sizing:border-box; }
html { font-size:16px; -webkit-font-smoothing:antialiased; }
body {
  font-family: var(--font-family);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
}

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

/* --- COMPOSANTS --- */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: var(--space-2); padding: var(--space-3) var(--space-6);
  font-size: var(--font-size-sm); font-weight: 600;
  border-radius: var(--radius-lg); border: none;
  cursor: pointer; transition: all var(--transition-fast);
  background: var(--color-primary); color: white;
  box-shadow: var(--shadow-sm);
}
.btn:hover { background: var(--color-primary-dark); transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn-outline {
  background: transparent; border: 1.5px solid var(--color-primary);
  color: var(--color-primary);
}
.btn-outline:hover { background: var(--color-primary); color: white; }
.btn-ghost { background: transparent; color: var(--color-text-muted); }
.btn-ghost:hover { background: rgba(0,0,0,0.03); color: var(--color-text); }
.btn-sm { padding: var(--space-1) var(--space-3); font-size: var(--font-size-xs); }
.btn-lg { padding: var(--space-4) var(--space-8); font-size: var(--font-size-base); }

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-2xl);
  padding: var(--space-6);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-normal);
}
.card:hover { box-shadow: var(--shadow-md); }

.form-control {
  width: 100%; padding: var(--space-3) var(--space-4);
  font-size: var(--font-size-base); background: var(--color-surface);
  border: 1px solid var(--color-border); border-radius: var(--radius-lg);
  color: var(--color-text); transition: border-color var(--transition-fast);
}
.form-control:focus { outline: none; border-color: var(--color-primary); box-shadow: 0 0 0 3px rgba(67,97,238,0.15); }

.badge {
  display: inline-block; padding: var(--space-1) var(--space-2);
  font-size: var(--font-size-xs); font-weight: 600;
  border-radius: var(--radius-sm); background: var(--color-primary); color: white;
}

/* --- NAVBAR COMMUNE --- */
.navbar {
  background: white;
  border-bottom: 1px solid var(--color-border);
  padding: 0.75rem 0;
  position: sticky; top:0; z-index:100;
  backdrop-filter: blur(10px);
  background: rgba(255,255,255,0.9);
}
.navbar .container { display: flex; align-items: center; justify-content: space-between; }
.navbar-brand { display: flex; align-items: center; font-weight: 700; font-size: 1.4rem; color: var(--color-primary); }
.navbar-brand img { height: 38px; margin-right: var(--space-2); border-radius: var(--radius-md); }
.nav-link { color: var(--color-text-muted); font-weight: 500; padding: var(--space-2) var(--space-4); border-radius: var(--radius-md); transition: var(--transition-fast); }
.nav-link:hover, .nav-link.active { color: var(--color-primary); background: rgba(67,97,238,0.05); }
.nav-btn { padding: var(--space-2) var(--space-4); border-radius: var(--radius-lg); font-weight: 600; transition: var(--transition-fast); }
.nav-btn-primary { background: var(--color-primary); color: white; }
.nav-btn-primary:hover { background: var(--color-primary-dark); }
.nav-btn-outline { border: 1.5px solid var(--color-primary); color: var(--color-primary); }
.nav-btn-outline:hover { background: var(--color-primary); color: white; }

/* --- HERO SECTION --- */
.hero {
  background: linear-gradient(135deg, #4361ee 0%, #7209b7 100%);
  color: white; padding: var(--space-20) 0; text-align: center;
}
.hero h1 { font-size: var(--font-size-5xl); font-weight: 800; margin-bottom: var(--space-4); }
.hero p { font-size: var(--font-size-xl); opacity: 0.9; max-width: 600px; margin: 0 auto var(--space-8); }
.hero .btn { background: white; color: var(--color-primary); font-size: var(--font-size-lg); padding: var(--space-4) var(--space-8); }
.hero .btn:hover { background: #f0f0ff; }

/* --- GRILLE DE CARTES --- */
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: var(--space-6); }

/* --- SECTION TITLES --- */
.section-title {
  font-size: var(--font-size-3xl); font-weight: 700;
  color: var(--color-text); text-align: center; margin-bottom: var(--space-10);
  position: relative;
}
.section-title::after {
  content: ''; display: block; width: 60px; height: 4px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
  margin: var(--space-4) auto 0; border-radius: 2px;
}