.intro{display:flex;justify-content:space-between;gap:24px;align-items:flex-end;margin-bottom:30px}.progress{list-style:none;display:flex;gap:9px;margin:0;padding:0;font-family:Consolas,monospace}.progress li{width:38px;height:38px;border:1px solid var(--line);display:grid;place-items:center;color:var(--muted);font-size:12px}.progress li[aria-current]{background:var(--ink);color:#fff;border-color:var(--ink)}.progress li.done{background:#e3ece6;color:#225b47;border-color:#c9d8ce}.experience{display:grid;grid-template-columns:minmax(0,1fr) 286px;border:1px solid var(--ink)}.viewer-wrap{position:relative;background:#eef1ed;min-width:0;overflow:hidden;height:510px}#viewport{width:100%;height:100%;touch-action:none}#viewport canvas{display:block;width:100%;height:100%}.viewer-top,.viewer-bottom{position:absolute;left:20px;right:20px;display:flex;justify-content:space-between;align-items:center;pointer-events:none;font-size:10px;gap:14px}.viewer-top{top:20px}.viewer-bottom{bottom:10px;color:var(--muted)}.viewer-bottom button{pointer-events:auto;font-size:10px}.welcome{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;flex-direction:column;pointer-events:none}.welcome-number{font:italic 160px Georgia,serif;color:#b6c4b9;line-height:1}.welcome p{font-size:15px;line-height:1.8;text-align:center;color:#58675b}.loading{position:absolute;inset:0;display:grid;place-items:center;background:#eef1edf2;font-size:14px;margin:0}.controls{padding:28px 23px;display:flex;flex-direction:column;gap:24px;border-left:1px solid var(--ink)}.controls h2{font-size:22px;letter-spacing:-.04em;margin:0 0 14px;line-height:1.5}.actions{display:flex;flex-direction:column;gap:10px}.actions button{text-align:left}.actions .link-button{text-align:center}.key-hint{float:right;font:10px Consolas,monospace;opacity:.65;padding-top:4px}.footnote{margin-top:auto;margin-bottom:0;padding-top:16px;border-top:1px solid var(--line)}.slider-label{display:flex;justify-content:space-between;font-size:12px;margin-bottom:8px}#level{width:100%;accent-color:#225b47;margin:12px 0 18px;min-height:24px}#mesh-toggle{font-size:12px;width:100%}.summary{padding:40px;border:1px solid var(--ink);background:var(--wash)}.summary h2{font-size:28px;letter-spacing:-.04em}.summary ol{list-style:none;padding:0;margin:28px 0;display:grid;grid-template-columns:repeat(5,1fr);gap:12px}.summary li{border-top:1px solid var(--ink);padding:18px 0;font-size:14px}.summary li strong{display:block;font:26px Georgia,serif;margin:14px 0}.summary li small{color:var(--muted)}.summary>a{font-size:13px;margin-left:20px}@media(max-width:850px){.experience{grid-template-columns:minmax(0,1fr) 250px}.controls{padding:22px 18px}}@media(max-width:650px){.intro{align-items:flex-start;flex-direction:column}.progress{gap:7px}.progress li{width:30px;height:30px}.experience{grid-template-columns:1fr}.viewer-wrap{height:350px}.controls{border-left:0;border-top:1px solid var(--ink);padding:24px;gap:20px}.viewer-top,.viewer-bottom{left:12px;right:12px;font-size:9px}.viewer-bottom span{max-width:65%;line-height:1.5}.footnote{display:none}.summary{padding:25px}.summary ol{grid-template-columns:1fr}.summary li{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:12px 0}.summary li strong{margin:0;font-size:22px}.summary>a{display:block;margin:20px 0 0}.summary h2{font-size:23px}}

.viewer-wrap{height:auto;min-height:510px}#viewport{position:absolute;inset:0}@media(max-width:650px){.viewer-wrap{height:350px;min-height:350px}}

#answer-form{display:flex;flex-direction:column;gap:12px}
#answer-form label{font-size:13px;font-weight:600}
#answer{width:100%;min-width:0;min-height:46px;padding:10px 12px;border:1px solid var(--ink);border-radius:0;background:#fff;color:var(--ink);font-size:16px}
#answer-form .small{margin:0}
#answer-form .link-button{font-size:12px}
#answer-comparison{border-left:3px solid var(--line);padding:14px;background:var(--wash)}
#answer-comparison[data-result=correct]{border-color:#225b47}
#answer-comparison[data-result=incorrect]{border-color:#995538}
#answer-verdict{font-size:15px;font-weight:700;margin:0 0 18px}
.answer-pair{margin:0;overflow-wrap:anywhere}
.answer-pair dt{font-size:11px;color:var(--muted);margin:14px 0 3px}
.answer-pair dd{margin:0;font-size:15px;font-weight:600;line-height:1.6}
.summary li{display:block;min-width:0}
.summary li .result-verdict{font:600 13px 'Malgun Gothic',sans-serif;margin:0 0 18px}
.summary li[data-result=correct] .result-verdict{color:#225b47}
.summary li[data-result=incorrect] .result-verdict{color:#995538}
.summary li .answer-pair{margin-bottom:18px}