/* IGCSE Exam Coach and AS Essay Writer (economics/exam-coach.js): the question on the left, the part being worked on
   on the right (stacked on a phone). Colours are theme tokens only (THEME-TOKENS.md). */
.ec-bar{display:flex;flex-wrap:wrap;align-items:center;gap:8px 14px}
.ec-bar label{font:600 12px/1 var(--font-mono);letter-spacing:.06em;text-transform:uppercase;color:var(--muted)}
.ec-bar select{max-width:min(520px,100%)}
.ec-done{font-size:13px;color:var(--muted)}
.ec-bar .score-chip{margin-left:auto}
.ec-work{display:grid;grid-template-columns:minmax(280px,5fr) 7fr;gap:12px;align-items:start}
@media (max-width:900px){.ec-work{grid-template-columns:1fr}}
.ec-paper,.ec-part{padding:14px 16px}
.ec-paper h2{font:700 20px/1.25 var(--font-display);margin:0 0 4px}
.ec-source{font-size:12.5px;color:var(--muted);margin:0 0 10px}
.ec-stem{font-size:15px;line-height:1.55}
.ec-stem h3{font-size:16px;margin:4px 0 6px}
.ec-table{border-collapse:collapse;margin:10px 0;font-size:14px;width:100%}
.ec-table caption{caption-side:top;text-align:left;font-weight:700;padding-bottom:4px;color:var(--ink)}
.ec-table th,.ec-table td{border:1px solid var(--line);padding:4px 8px;text-align:left}
.ec-table th{text-transform:none;letter-spacing:normal;font:600 14px/1.35 var(--font-body);color:var(--ink)}
.ec-table td{font-variant-numeric:tabular-nums}
.ec-table thead th{background:var(--panel-2)}
.ec-note{font-size:13px;color:var(--muted)}
.ec-parts{display:flex;flex-direction:column;gap:6px;margin-top:12px}
.ec-pip{display:flex;justify-content:space-between;align-items:baseline;gap:10px;padding:8px 10px;border:1px solid var(--line-strong);border-radius:6px;background:var(--panel);color:var(--ink);text-align:left;font-size:14px;cursor:pointer}
.ec-pip span{font-size:12.5px;color:var(--muted)}
.ec-pip:hover{border-color:var(--accent)}
.ec-pip.now{outline:2px solid var(--accent);outline-offset:1px}
.ec-pip.done{background:var(--panel-2)}
.ec-pip.full{background:var(--ok-tint);border-color:var(--ok)}
.ec-pip:focus-visible{outline:2px solid var(--focus);outline-offset:1px}
.ec-qhead{border-bottom:1px solid var(--line);padding-bottom:8px;margin-bottom:10px}
.ec-q{font-size:16px;line-height:1.5;margin:0;font-weight:600}
.ec-pid{color:var(--accent)}
.ec-max{font-family:var(--font-mono);font-weight:600;color:var(--muted)}
.ec-step{margin:0 0 14px}
.ec-step h3{display:flex;align-items:center;gap:8px;font-size:15px;margin:0 0 8px}
.ec-n{display:inline-grid;place-items:center;width:22px;height:22px;border-radius:50%;background:var(--accent);color:#fff;font:700 12px/1 var(--font-mono);flex:none}
.ec-locked{opacity:.6}
.ec-help{font-size:13.5px;color:var(--ink-soft);margin:0 0 8px}
.ec-options{display:flex;flex-direction:column;gap:6px}
.ec-opt{text-align:left;padding:8px 12px;border:1px solid var(--line-strong);border-radius:6px;background:var(--panel);color:var(--ink);font-size:14px;cursor:pointer}
.ec-opt:hover:not(:disabled){border-color:var(--accent)}
.ec-opt.right{border-color:var(--ok);background:var(--ok-tint)}
.ec-opt.wrong{border-color:var(--bad);background:var(--bad-tint)}
.ec-opt:disabled{cursor:default;color:var(--ink)}
.ec-why{display:block;margin-top:4px;font-size:13px;color:var(--ink-soft)}
.ec-build{display:grid;grid-template-columns:1fr 1fr;gap:10px}
@media (max-width:640px){.ec-build{grid-template-columns:1fr}}
.ec-bank{display:flex;flex-direction:column;gap:6px}
.ec-block{text-align:left;padding:7px 10px;border:1px dashed var(--line-strong);border-radius:6px;background:var(--panel-2);color:var(--ink);font-size:13.5px;line-height:1.4;cursor:pointer}
.ec-block:hover,.ec-block:focus-visible{border-style:solid;border-color:var(--accent)}
.ec-answer{margin:0;padding:8px 8px 8px 30px;border:1px solid var(--line-strong);border-radius:6px;background:var(--panel);min-height:120px;font-size:13.5px;line-height:1.45}
.ec-answer li{display:flex;justify-content:space-between;gap:6px;align-items:flex-start;padding:4px 0;border-bottom:1px solid var(--line)}
.ec-answer li:last-child{border-bottom:0}
.ec-answer li.ec-empty{display:list-item;list-style:none;margin-left:-22px;color:var(--muted);border:0}
.ec-acts{display:flex;gap:2px;flex:none}
.ec-acts .icon-btn{width:26px;height:26px;font-size:13px}
.ec-actions{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-top:10px}
.ec-calc{display:flex;flex-wrap:wrap;align-items:center;gap:6px}
.ec-calc input{width:9em;padding:6px 8px;border:1px solid var(--line-strong);border-radius:6px;background:var(--panel);color:var(--ink);font:500 16px var(--font-mono)}
.ec-calc label{font-weight:600;margin-right:6px}
.ec-unit{font-family:var(--font-mono)}
.ec-diagram{display:grid;grid-template-columns:minmax(260px,1fr) minmax(220px,1fr);gap:12px;align-items:start}
@media (max-width:640px){.ec-diagram{grid-template-columns:1fr}}
.ec-diagram svg{width:100%;height:auto;background:var(--panel-2);border-radius:6px}
.ec-axis{stroke:var(--ink);stroke-width:2}
.ec-axlabel{fill:var(--ink);font:600 12px var(--font-body)}
.ec-axlabel.end{text-anchor:end}
.ec-d{stroke:var(--viz-1);stroke-width:2.5}
.ec-s{stroke:var(--viz-2);stroke-width:2.5}
.ec-new{stroke-dasharray:7 5}
text.ec-clabel{stroke:none;font:700 12px var(--font-mono)}
text.ec-clabel.ec-d{fill:var(--viz-1)}
text.ec-clabel.ec-s{fill:var(--viz-2)}
.ec-guide{stroke:var(--muted);stroke-width:1;stroke-dasharray:3 3}
.ec-eq{fill:var(--ink)}
.ec-tick{fill:var(--ink-soft);font:600 11px var(--font-mono)}
.ec-tick.end{text-anchor:end}
.ec-tick.mid{text-anchor:middle}
.ec-controls{display:flex;flex-direction:column;gap:6px}
.ec-choose{border:1px solid var(--line);border-radius:6px;padding:4px 10px 6px;margin:0}
.ec-choose legend{font-size:12.5px;font-weight:700;float:none;width:auto;padding:0 4px;margin:0}
.ec-choose label{display:inline-flex;gap:5px;align-items:center;margin-right:12px;font-size:13.5px}
.ec-result{border-top:1px solid var(--line);padding-top:10px}
.ec-mark{font-size:15px;margin:0 0 6px}
.ec-points{list-style:none;padding:0;margin:0 0 10px;font-size:13.5px}
.ec-points li{padding:3px 0 3px 22px;position:relative}
.ec-points li::before{position:absolute;left:0;top:3px;font-weight:700}
.ec-points li.ok::before{content:"✓";color:var(--ok)}
.ec-points li.miss::before{content:"○";color:var(--muted)}
.ec-points li.bad::before{content:"✗";color:var(--bad)}
.ec-points li.bad{color:var(--ink)}
.ec-model{background:var(--ok-tint);border-left:3px solid var(--ok);border-radius:0 6px 6px 0;padding:8px 12px;margin:0 0 10px;font-size:14px;line-height:1.55}
.ec-model h4{font-size:13px;margin:0 0 4px;text-transform:uppercase;letter-spacing:.05em;color:var(--ok)}
.ec-model p,.ec-model ol{margin:0}
.ec-tip{background:var(--hint-tint);border-left:3px solid var(--hint);border-radius:0 6px 6px 0;padding:8px 12px;margin:0;font-size:13.5px}
.ec-own{border:1px solid var(--line);border-radius:6px;padding:8px 12px;margin-top:6px}
.ec-own summary{font-weight:700;cursor:pointer}
.ec-own-label{display:block;font-weight:700;font-size:13.5px;margin:8px 0 3px}
.ec-own-label span{font-weight:400;color:var(--ink-soft)}
.ec-own textarea{width:100%;padding:6px 8px;border:1px solid var(--line-strong);border-radius:6px;background:var(--panel);color:var(--ink);font:14px/1.5 var(--font-body)}
.ec-self{border:1px solid var(--line);border-radius:6px;padding:6px 10px;margin:10px 0 0}
.ec-self legend{font-size:13px;font-weight:700;float:none;width:auto;padding:0 4px;margin:0}
.ec-self label{display:flex;gap:6px;align-items:flex-start;font-size:13.5px;padding:2px 0}
.ec-levels label b{white-space:nowrap}