.btn{min-width:44px;min-height:44px;border-radius:14px;background:linear-gradient(180deg,#304965,#213650);color:#fff;font-weight:850;padding:clamp(8px,1.1vw,11px) clamp(10px,1.5vw,16px);cursor:pointer;box-shadow:0 5px 0 #16283e,0 10px 20px rgba(0,0,0,.18);transition:transform .1s,filter .1s;font-size:clamp(12px,1.5vw,15px);display:inline-flex;align-items:center;justify-content:center;gap:6px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;touch-action:manipulation}
.btn:hover{filter:brightness(1.12)}
.btn:active{transform:translateY(3px);box-shadow:0 2px 0 #16283e}
.btn.primary{background:linear-gradient(180deg,#ffda63,#f5ae2d);color:#1a2433;box-shadow:0 5px 0 #b47718}
.btn.danger{background:linear-gradient(180deg,#ff7e8a,#e64e61)}
.btn.ghost{background:transparent;box-shadow:none;border:1px solid rgba(255,255,255,.12)}
.btn[disabled]{opacity:.45;cursor:not-allowed;filter:none}
.btn[data-on="1"]{border-color:rgba(255,207,69,.6);color:var(--accent)}