/* Shared JC LAB controls. All page types, including dynamically rendered exercises. */
button,input,select,textarea{font-family:var(--sans);font-size:14px;box-sizing:border-box;color:var(--text)}
button,input,select,textarea,a,summary{-webkit-tap-highlight-color:transparent}
:where(button,a,input,select,textarea,summary):focus-visible{outline:2px solid var(--blue);outline-offset:3px}
:where(button,select,input[type=checkbox],input[type=range]){cursor:pointer}
button:disabled{cursor:not-allowed;opacity:.55}
.ui-icon{display:block;width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;flex:none}

/* Fields retain native form semantics; only their appearance is shared. */
input[type=search],input[type=number],select,textarea,.bc-combobox input{border:1px solid var(--line-strong);border-radius:6px;background:var(--paper);transition:border-color .15s,background-color .15s}
input[type=search]:hover,input[type=number]:hover,select:hover,textarea:hover{border-color:var(--text)}
input::placeholder,textarea::placeholder{color:var(--muted);opacity:1}
input[type=search]::-webkit-search-cancel-button{appearance:none}
input[type=number],select{min-height:44px}
input[type=number]{font-variant-numeric:tabular-nums;padding:8px 10px;text-align:right}
.field-pair>input[type=number]{width:88px;min-width:0;flex-shrink:0;border-radius:6px;padding:8px 10px;font-size:14px}
.use-section textarea,textarea{display:block;width:100%;max-width:100%;min-height:120px;padding:14px 16px;line-height:1.8;resize:vertical;border-radius:6px;background:var(--paper)}
textarea[readonly]{background:var(--bg);color:var(--soft)}
textarea[aria-invalid=true]{border-color:var(--red)}
.field-error{color:var(--red);font-size:13px;margin:8px 0 12px;line-height:1.7}
.field-error[hidden]{display:none}
.use-section label{display:block;font-size:14px;font-weight:600;margin:20px 0 8px}

/* Standard action buttons; answer cards keep their own content layout. */
:is(.bc-button,.pl-btn,.experiment .button,.graph-controls button,.theme-toggle,.pl-step button){min-height:44px;border:1px solid var(--line-strong);border-radius:6px;padding:10px 16px;background:var(--paper);color:var(--text);font:600 14px/1.5 var(--sans);letter-spacing:0;cursor:pointer;transition:background-color .15s,border-color .15s,color .15s}
:is(.bc-button,.pl-btn,.experiment .button,.graph-controls button,.theme-toggle,.pl-step button):hover:not(:disabled){background:var(--card);border-color:var(--text);color:var(--text);filter:none}
:is(.bc-button,.pl-btn.go){background:var(--text);color:var(--bg);border-color:var(--text)}
:is(.bc-button,.pl-btn.go):hover:not(:disabled){background:var(--soft);border-color:var(--soft);color:var(--bg)}
.bc-button.secondary{background:var(--paper);border-color:var(--line-strong);color:var(--text)}
.bc-button.secondary:hover:not(:disabled){background:var(--card);border-color:var(--text);color:var(--text)}
:is(.bc-button,.pl-btn,.experiment .button,.graph-controls button,.theme-toggle,.pl-step button):active:not(:disabled){border-color:var(--blue)}
.site-header .theme-toggle{width:44px;height:44px;padding:11px;display:grid;place-items:center;flex:none;background:transparent;border-color:transparent}
.graph-controls button{height:44px;min-width:44px;white-space:nowrap}
.graph-zoom #graph-zoom-in,.graph-zoom #graph-zoom-out{padding:11px}
.pl-step button{width:44px;height:44px;padding:0;font-size:20px}
.btn-line{display:inline-flex;align-items:center;min-height:44px;padding:8px 0;letter-spacing:0}
.pl-opps .opp{min-height:44px;border-radius:6px;background:var(--paper)}
.pl-opps .opp i{background:var(--text);color:var(--bg)}
.quiz-option,.dr-opt{min-height:44px;padding:14px 16px;border:1px solid var(--line-strong);border-radius:6px;background:var(--paper);font:400 15px/1.8 var(--sans);text-align:left;letter-spacing:0;transition:background-color .15s,border-color .15s}
.quiz-option:hover,.dr-opt:hover:not(:disabled){background:var(--card);border-color:var(--text)}
.quiz-option[aria-pressed=true]{border-color:var(--blue);background:color-mix(in srgb,var(--blue) 8%,var(--paper))}
.dr-opt:disabled{opacity:1;cursor:default}
.dr-opt.dim{color:var(--muted);background:var(--bg)}
.dr-opt.ok{border-color:var(--blue);background:color-mix(in srgb,var(--blue) 8%,var(--paper))}
.dr-opt.no{border-color:var(--red);background:color-mix(in srgb,var(--red) 6%,var(--paper))}
.dr-ex{font:400 15px/1.85 var(--sans)}

/* Search and checkbox: full hit areas, consistent icons and visible checked state. */
.wiki-search input{height:48px;padding:0 50px 0 44px}
.wiki-search>svg{pointer-events:none}
.wiki-search>button{position:absolute;right:2px;top:2px;width:44px;height:44px;border:0;background:transparent;border-radius:5px;color:var(--muted);padding:12px;display:grid;place-items:center}
.wiki-search>button[hidden]{display:none}
.wiki-search>button svg{position:static;width:20px;height:20px;stroke:currentColor}
.wiki-search>button:hover{background:var(--card);color:var(--text)}
.wiki-search:focus-within kbd{visibility:hidden}
.learning-filter{min-height:44px;font-size:13px;gap:9px;padding:6px 0;user-select:none}
input[type=checkbox]{appearance:none;-webkit-appearance:none;display:grid;place-content:center;width:18px;height:18px;flex:none;margin:0;border:1px solid var(--line-strong);border-radius:4px;background:var(--paper);transition:background-color .15s,border-color .15s}
input[type=checkbox]::after{content:"";width:8px;height:4px;border-left:2px solid var(--bg);border-bottom:2px solid var(--bg);transform:translateY(-1px) rotate(-45deg);opacity:0}
input[type=checkbox]:checked{background:var(--text);border-color:var(--text)}
input[type=checkbox]:checked::after{opacity:1}
.learning-filter:hover input{border-color:var(--text)}

/* One searchable selector for every current single-value select. */
.graph-controls select[hidden]{display:none}
.bc-combobox{position:relative;min-width:0}
.bc-combobox input{width:100%;height:44px;padding:0 52px 0 14px;font-size:14px;line-height:1.4;text-overflow:ellipsis}
.bc-combobox input:hover{border-color:var(--text)}
.bc-combobox input:focus{border-color:var(--blue);outline:none}
.bc-combobox:focus-within{outline:2px solid var(--blue);outline-offset:0;border-radius:6px}
.bc-combobox .combobox-toggle{position:absolute;right:0;top:0;width:44px;height:44px;min-width:44px;border:0;background:transparent;padding:12px;border-radius:6px;display:grid;place-items:center;color:var(--muted)}
.combobox-toggle svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;transition:transform .15s}
.is-open .combobox-toggle svg{transform:rotate(180deg)}
.combobox-popup{position:fixed;z-index:80;display:flex;flex-direction:column;overflow:hidden;border:1px solid var(--line-strong);border-radius:8px;background:var(--paper);color:var(--text);box-shadow:0 8px 24px #00000018;font-family:var(--sans)}
.combobox-popup[hidden]{display:none}
.combobox-hint,.combobox-status{flex:none;margin:0;padding:10px 14px;font-size:12px;line-height:1.6;color:var(--muted)}
.combobox-hint{border-bottom:1px solid var(--line)}
.combobox-status{border-top:1px solid var(--line)}
.combobox-popup [role=listbox]{min-height:0;overflow:auto;overscroll-behavior:contain;padding:4px;scrollbar-width:thin;touch-action:pan-y}
.combobox-option{min-height:44px;display:flex;align-items:center;gap:12px;padding:10px;border-radius:4px;font-size:14px;line-height:1.5;cursor:pointer}
.combobox-option>span:first-child{min-width:0;overflow-wrap:anywhere;flex:1}
.combobox-option.is-active{background:var(--card);outline:1px solid var(--line);outline-offset:-1px}
.combobox-check{color:var(--blue);flex:none;display:grid;place-items:center}
.combobox-check svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}

.controls input[type=range],.field-pair input[type=range],input[type=range]{appearance:none;-webkit-appearance:none;height:44px;margin:0;background:transparent;accent-color:var(--text);min-width:0}
input[type=range]::-webkit-slider-runnable-track{height:4px;border-radius:2px;background:var(--line-strong)}
input[type=range]::-webkit-slider-thumb{appearance:none;-webkit-appearance:none;width:18px;height:18px;border:2px solid var(--paper);border-radius:50%;background:var(--text);margin-top:-7px}
input[type=range]::-moz-range-track{height:4px;border-radius:2px;background:var(--line-strong)}
input[type=range]::-moz-range-thumb{width:14px;height:14px;border:2px solid var(--paper);border-radius:50%;background:var(--text)}
@media(max-width:600px){input[type=search],input[type=number],.field-pair>input[type=number],.bc-combobox input,select,textarea,.use-section textarea{font-size:16px}.bc-button,.pl-btn{max-width:100%;white-space:normal}.quiz-option,.dr-opt{font-size:15px}}
@media(prefers-reduced-motion:reduce){button,input,select,textarea,.combobox-toggle svg{transition:none}}
@media(forced-colors:active){input[type=checkbox]{appearance:auto}input[type=checkbox]::after{display:none}input[type=range]{appearance:auto}input[type=range]::-webkit-slider-thumb{appearance:auto}.ui-icon{stroke:ButtonText}}