.calc-bar{position:fixed;left:8px;right:8px;bottom:8px;z-index:6000;display:none;box-sizing:border-box;
height:56px;padding:5px;gap:5px;border-radius:22px;background:rgba(255,255,255,.96);
-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);box-shadow:0 4px 18px rgba(15,23,42,.22);
transform-origin:0 0;-webkit-user-select:none;user-select:none;touch-action:manipulation;
-webkit-tap-highlight-color:transparent}
.calc-bar.open{display:flex}
.calc-bar button{flex:1 1 0;min-width:0;height:auto;margin:0;padding:0;border:none;border-radius:17px;
background:#f1f5f9;color:var(--c-dark);font:600 24px/1 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;
display:flex;align-items:center;justify-content:center;cursor:pointer;touch-action:manipulation}
.calc-bar button.on{background:#cbd5e1}
.calc-bar button.eq{background:var(--c-accent-d);color:#fff}
.calc-bar button.eq.on{background:var(--c-accent-dd)}
input.calc-bad,textarea.calc-bad{border-color:#dc2626 !important;background-color:#fef2f2 !important;
box-shadow:0 0 0 2px rgba(220,38,38,.18) !important}