:root{--color-primary:#2c3e50;--color-secondary:#4caf50;--color-accent:#28a745;--color-error:#e74c3c;--color-success:#2ecc71;--color-warning:#ff9800;--color-text:#333;--color-text-light:#6c757d;--color-text-inverse:#fff;--bg-light:#f8f9fa;--bg-medium:#e9ecef;--bg-white:#fff;--border-radius:8px;--border-color:#ddd;--space-sm:10px;--space-md:20px;--space-lg:30px;--shadow-sm:0 2px 5px rgba(0,0,0,.1);--shadow-md:0 4px 12px rgba(0,0,0,.15);--shadow-lg:0 0 20px rgba(0,0,0,.1);--transition-fast:.2s;--transition-normal:.3s}*{box-sizing:border-box;margin:0;padding:0}body{font-family:'Segoe UI',Tahoma,Geneva,Verdana,sans-serif;background-color:var(--bg-light);color:var(--color-text);line-height:1.6;padding-top:60px}a{text-decoration:none;color:inherit}button{cursor:pointer;transition:all var(--transition-fast)}.container{max-width:1200px;margin:0 auto;padding:var(--space-md)}.section{background:var(--bg-white);border-radius:var(--border-radius);padding:var(--space-lg);margin-bottom:var(--space-lg);box-shadow:var(--shadow-sm)}.section-title{color:var(--color-primary);margin-bottom:var(--space-md);padding-bottom:var(--space-sm);border-bottom:2px solid var(--bg-medium)}.main-nav{position:fixed;top:0;left:0;right:0;background:var(--color-primary);color:var(--color-text-inverse);z-index:1000;box-shadow:var(--shadow-sm)}.nav-container{display:flex;justify-content:space-between;align-items:center;max-width:1200px;margin:0 auto;padding:0 var(--space-md);height:60px}.nav-logo{font-size:1.5rem;font-weight:600}.nav-links{display:flex;gap:var(--space-md)}.nav-links a{padding:5px 10px;border-radius:4px;transition:background-color var(--transition-normal)}.nav-links a:hover{background-color:rgba(255,255,255,.1)}.nav-links a.active{color:var(--color-secondary);font-weight:bold}.nav-logout{color:#ff6b6b!important}.dataTables_wrapper{margin-top:var(--space-md)}table.dataTable tbody tr:hover{background-color:var(--bg-medium)!important}.challenges-container{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:var(--space-md);margin-top:var(--space-md)}.challenge-tile{padding:var(--space-md);border-radius:var(--border-radius);text-align:center;transition:all var(--transition-normal);border:3px solid var(--bg-white);background-color:var(--bg-light);box-shadow:var(--shadow-sm)}.challenge-tile.reussie{border-color:var(--color-secondary)}.challenge-tile:hover{transform:translateY(-5px);box-shadow:var(--shadow-md)}.challenge-name{font-weight:bold;margin-bottom:8px}.challenge-points{font-size:.9em;color:var(--color-text-light)}.flag-form{display:flex;gap:var(--space-sm);margin-top:var(--space-md)}.flag-form input[type="text"]{flex:1;max-width:400px;padding:var(--space-sm);border:1px solid var(--border-color);border-radius:var(--border-radius)}.btn{padding:var(--space-sm) var(--space-md);border:none;border-radius:var(--border-radius);font-weight:500}.btn-primary{background-color:var(--color-secondary);color:var(--color-text-inverse)}.btn-primary:hover{background-color:#3e8e41}.btn-danger{background-color:var(--color-error);color:var(--color-text-inverse)}.btn-danger:hover{background-color:#d32f2f}.message{padding:var(--space-md);margin-bottom:var(--space-md);border-radius:var(--border-radius);text-align:center}.message-success{background:#dff0d8;color:#3c763d}.message-error{background:#f2dede;color:#a94442}.login-page{display:flex;min-height:calc(100vh - 60px);align-items:center;justify-content:center;padding:var(--space-md)}.login-container{display:flex;max-width:1000px;width:100%;background:var(--bg-white);border-radius:var(--border-radius);box-shadow:var(--shadow-lg)}.form-container{flex:1;padding:var(--space-lg)}.login-form{border-right:1px solid var(--bg-medium)}.form-group{margin-bottom:var(--space-md)}.admin-title{color:var(--color-primary);margin-bottom:var(--space-lg);text-align:center}.joueur-item{display:flex;flex-wrap:wrap;padding:var(--space-md);border-bottom:1px solid var(--border-color);align-items:center}.joueur-item:last-child{border-bottom:none}.joueur-form{display:flex;flex-wrap:wrap;gap:var(--space-md);align-items:center;flex:1}.checkbox-container{display:flex;align-items:center;gap:5px}.admin-badge{background:var(--color-warning);color:var(--color-text-inverse);padding:3px 8px;border-radius:3px;font-size:.8em;margin-left:var(--space-sm)}.scroll-margin{scroll-margin-top:80px}@media (max-width:768px){.login-container{flex-direction:column}.login-form{border-right:none;border-bottom:1px solid var(--bg-medium)}.challenges-container{grid-template-columns:1fr}.flag-form{flex-direction:column}.flag-form input[type="text"]{max-width:100%}.joueur-form{flex-direction:column;align-items:flex-start}}.session-message{position:fixed;top:80px;left:50%;transform:translateX(-50%);background-color:var(--color-primary);color:#fff;padding:15px 30px;border-radius:4px;box-shadow:0 4px 12px rgba(0,0,0,.15);z-index:999;animation:fadeOut 5s forwards;opacity:.95}@keyframes fadeOut {
    0% { opacity: 0.95; }
    80% { opacity: 0.95; }
    100% { opacity: 0; visibility: hidden; }
}