/* MémoireActiv - Style Principal */
* { margin: 0; padding: 0; box-sizing: border-box; }
:root {
    --primary: #1E3A8A; --secondary: #F97316; --accent: #10B981;
    --dark: #1F2937; --gray: #6B7280; --light: #F3F4F6; --white: #FFF;
    --shadow: 0 4px 6px -1px rgba(0,0,0,0.1);
}
body { font-family: 'Segoe UI', sans-serif; color: var(--dark); line-height: 1.6; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 1.5rem; }

/* Navigation */
.navbar { background: var(--white); box-shadow: var(--shadow); position: sticky; top: 0; z-index: 1000; padding: 1rem 0; }
.nav-wrapper { display: flex; justify-content: space-between; align-items: center; }
.logo { display: flex; align-items: center; gap: 0.5rem; font-size: 1.5rem; font-weight: 700; color: var(--primary); }
.nav-menu { display: flex; align-items: center; gap: 2rem; }
.nav-menu a { color: var(--dark); font-weight: 500; transition: color 0.3s; }
.nav-menu a:hover { color: var(--primary); }

/* Boutons */
.btn-primary, .btn-secondary { display: inline-block; padding: 0.75rem 1.5rem; border-radius: 0.5rem; font-weight: 600; cursor: pointer; border: none; transition: all 0.3s; }
.btn-primary { background: linear-gradient(135deg, var(--primary), #3B82F6); color: var(--white); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 10px 15px -3px rgba(0,0,0,0.1); }
.btn-secondary { background-color: var(--secondary); color: var(--white); }
.btn-large { padding: 1rem 2rem; font-size: 1.125rem; }
.btn-full { width: 100%; }

/* Hero */
.hero { background: linear-gradient(135deg, #EFF6FF 0%, #DBEAFE 100%); padding: 4rem 0; }
.hero-content { display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; align-items: center; }
.hero h1 { font-size: 3.5rem; margin-bottom: 1rem; }
.hero .highlight { color: var(--secondary); }
.hero-buttons { display: flex; gap: 1rem; margin: 2rem 0; }
.hero-stats { display: flex; gap: 2rem; }
.hero-stats .stat { display: flex; align-items: center; gap: 0.75rem; }
.hero-stats i { font-size: 2rem; color: var(--primary); }

/* Sections */
section { padding: 4rem 0; }
.section-title { text-align: center; font-size: 2.5rem; margin-bottom: 1rem; }
.section-subtitle { text-align: center; color: var(--gray); font-size: 1.125rem; margin-bottom: 3rem; }

/* Cards */
.categories-grid, .features-grid, .exercises-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 2rem; }
.category-card, .feature-card, .exercise-card { background: var(--white); border: 2px solid var(--light); border-radius: 1rem; padding: 2rem; transition: all 0.3s; }
.category-card:hover, .feature-card:hover, .exercise-card:hover { border-color: var(--primary); transform: translateY(-5px); box-shadow: 0 20px 25px -5px rgba(0,0,0,0.1); }
.category-card i, .feature-icon { font-size: 3rem; color: var(--primary); margin-bottom: 1rem; }

/* Forms */
.form-group { margin-bottom: 1.5rem; }
.form-group label { display: block; margin-bottom: 0.5rem; font-weight: 600; }
.form-group input, .form-group select, .form-group textarea { width: 100%; padding: 0.75rem; border: 2px solid var(--light); border-radius: 0.5rem; font-size: 1rem; transition: border-color 0.3s; }
.form-group input:focus, .form-group select:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(30,58,138,0.1); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }

/* Alerts */
.alert { padding: 1rem; border-radius: 0.5rem; margin-bottom: 1rem; display: flex; align-items: center; gap: 0.75rem; }
.alert-success { background-color: #D1FAE5; color: #065F46; border: 1px solid #6EE7B7; }
.alert-error { background-color: #FEE2E2; color: #991B1B; border: 1px solid #FCA5A5; }

/* Auth Page */
.auth-page { background: linear-gradient(135deg, #EFF6FF 0%, #DBEAFE 100%); min-height: 100vh; display: flex; align-items: center; }
.auth-container { display: grid; grid-template-columns: 1fr 1fr; max-width: 1000px; margin: 2rem auto; background: var(--white); border-radius: 1.5rem; box-shadow: 0 20px 25px -5px rgba(0,0,0,0.1); overflow: hidden; }
.auth-card { padding: 3rem; }
.logo-large { display: inline-flex; align-items: center; gap: 0.5rem; font-size: 2rem; font-weight: 700; color: var(--primary); margin-bottom: 1rem; }

/* Footer */
.footer { background-color: var(--dark); color: var(--white); padding: 3rem 0 1rem; }
.footer-content { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 2rem; margin-bottom: 2rem; }
.footer a { color: #D1D5DB; }
.footer a:hover { color: var(--white); }
.social-links { display: flex; gap: 1rem; margin-top: 1rem; }
.social-links a { width: 40px; height: 40px; background-color: var(--gray); border-radius: 50%; display: flex; align-items: center; justify-content: center; }

/* Responsive */
@media (max-width: 1024px) {
    .hero-content, .auth-container { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
    h1 { font-size: 2rem; }
    .nav-menu { display: none; }
    .hero-buttons { flex-direction: column; }
    .form-row { grid-template-columns: 1fr; }
}