/* Calculator frame follows the public MAP four-function layout; arithmetic is local. */
.exam-calculator-layer{position:fixed;inset:0;z-index:80;pointer-events:none}
.exam-calculator-panel{position:absolute;width:442px;pointer-events:auto;background:#4c4c4c;border:1px solid #003766;box-shadow:0 2px 9px #0003;color:#111;font-family:Arial,sans-serif;line-height:normal}
.calc-title-bar{height:44px;display:flex;align-items:center;justify-content:space-between;padding:0 14px;background:#cdcdd0;color:#000;font-family:OpenSans,Verdana,Geneva,sans-serif;font-size:16px;cursor:move;touch-action:none}
.exam-calculator-panel:focus-within .calc-title-bar{background:#025783;color:#fff}
.calc-hide{height:36px;border:0;border-top:4px solid transparent;border-bottom:4px solid transparent;border-radius:4px;padding:0 9px;font:14px OpenSans,Verdana,Geneva,sans-serif;background:transparent;color:inherit}
.calc-hide:hover{background:#fff;color:#000}
.calc-body{height:440px;width:440px;display:grid;grid-template-rows:135px 54px 47px minmax(0,1fr);border:1px solid #ccc;background:#fff;position:relative;overflow:hidden}
.calc-history{overflow-y:auto;overflow-x:hidden;background:#fff;border-bottom:1px solid #ddd;outline-offset:-2px;padding:0}
.calc-history-row{display:flex;align-items:center;justify-content:space-between;min-height:45px;border-bottom:1px solid #e4e4e4;padding:5px 10px;gap:8px}
.calc-history-row button{font:20px/1.25 "Times New Roman",serif;border:0;border-radius:0;padding:3px;background:transparent;color:#222;text-align:left;overflow-wrap:anywhere}
.calc-history-row .calc-history-expression{flex:1}.calc-history-row .calc-history-result{text-align:right;max-width:58%}
.calc-history-row button:hover{background:#f0f4f9}
.calc-editor{min-height:0;position:relative;display:flex;align-items:center;gap:8px;background:#fff;padding:0 12px;border-bottom:1px solid #d4d4d4}
.calc-expression{flex:1;width:0;min-width:70px;height:50px;padding:0;border:0;border-radius:0;font:22px/1.3 "Times New Roman",serif;background:transparent;color:#111;outline:none!important;box-shadow:none}
.calc-preview{font:20px/1.25 "Times New Roman",serif;text-align:right;max-width:55%;overflow-wrap:anywhere;color:#222}
.calc-preview.calc-error{font:11px/1.2 Arial,sans-serif;color:#b62623;max-width:55%}
.calc-controls{display:grid;grid-template-columns:1fr 1fr 1.35fr 1fr 1fr;background:#ededed}
.calc-control{display:flex;align-items:center;justify-content:center;height:47px;padding:0;border:0;border-radius:0;background:transparent;color:#666;font:13px Arial,sans-serif}
.calc-control svg{width:22px;height:22px}
.calc-control:disabled{color:#d2d2d2;opacity:1}.calc-control:enabled:hover{background:#e1e1e1}
.calc-keypad{background:#ededed;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));grid-template-rows:repeat(5,minmax(0,1fr));gap:4px;padding:0 4px 5px}
.calc-key{padding:0;border:1px solid #d7d7d7;border-radius:2px;box-shadow:inset 0 0 0 1px #fff6;background:linear-gradient(#fff,#f8f8f8);color:#111;font:18px "Times New Roman",serif;min-height:0}
.calc-key.calc-number{background:linear-gradient(#d1d1d1,#c3c3c3);border-color:#bbb}
.calc-key.calc-enter{background:#2d70d7;border-color:#2863bd;color:#fff;font:bold 22px Arial,sans-serif}
.calc-key.calc-ans{font:13px Arial,sans-serif}
.calc-key:hover:enabled{filter:brightness(.95)}.calc-key:active:enabled{box-shadow:inset 0 2px 4px #0004}
.calc-key:disabled{color:#888;opacity:1}
.calc-settings{position:absolute;z-index:3;right:8px;top:178px;width:230px;padding:14px;background:#fff;border:1px solid #bbb;box-shadow:0 3px 12px #0003;font:14px Arial,sans-serif;color:#222}
.calc-settings>strong{display:block;margin-bottom:12px}
.calc-setting{display:flex;align-items:center;gap:8px;margin:10px 0;cursor:pointer}
.calc-setting input{width:16px;height:16px;margin:0;accent-color:#2d70d7}.calc-setting span{display:inline;margin:0}
.calc-projector .calc-history-row button,.calc-projector .calc-expression,.calc-projector .calc-preview{font-size:26px}
.calc-projector .calc-key{font-size:23px}.calc-projector .calc-key.calc-ans{font-size:18px}
.calc-contrast .calc-body,.calc-contrast .calc-history,.calc-contrast .calc-editor,.calc-contrast .calc-settings{background:#111;color:#fff}
.calc-contrast .calc-history-row button,.calc-contrast .calc-expression,.calc-contrast .calc-preview{color:#fff}
.calc-contrast .calc-history-row button:hover{background:#444}
.calc-contrast .calc-controls,.calc-contrast .calc-keypad{background:#222}
.calc-contrast .calc-control{color:#fff}.calc-contrast .calc-control:disabled{color:#777}
.calc-contrast .calc-control:enabled:hover{background:#444}
.calc-contrast .calc-key{background:#111;color:#fff;border-color:#fff}
.calc-contrast .calc-key.calc-number{background:#444;color:#fff}
.calc-contrast .calc-key.calc-enter{background:#fafafa;color:#111}
.calc-contrast .calc-preview.calc-error{color:#ffaaa8}
.exam-calculator-panel button:focus-visible,.exam-calculator-panel .calc-title-bar:focus-visible{outline:2px solid #8dc6dd;outline-offset:-2px}
.tool-button[aria-pressed=true] .map-icon-calculator{background-image:url("/reference-assets/toolbar-calculator-04.svg")}