/* Style "Liseré nuancier" — ambiance actuelle + touches du logo */
:root{--nuancier:linear-gradient(90deg,#2962FF,#00BCD4,#4CAF50,#8BC34A,#FFC107,#FF9800,#F44336)}
.snav{border-bottom:3px solid transparent;border-image:var(--nuancier) 1}
.sfooter{border-top:3px solid transparent;border-image:var(--nuancier) 1}
.sep{height:3px;width:220px;max-width:60%;background:var(--nuancier);border:0;border-radius:2px;opacity:1}
.sep .sep-d{display:none}
.btn-primary:hover{filter:saturate(1.35) brightness(1.05)}
.slink:hover{background-image:var(--nuancier);background-clip:text;-webkit-background-clip:text;color:transparent}