:root{--bg:#00a;--fg:#fff;--highlight:#ff5;--border:#fff;--ok:#5f5;--bad:#f55}*{box-sizing:border-box}html,body,#root{width:100%;height:100%;margin:0;overflow:hidden}body{background:var(--bg);color:var(--fg);font-family:Courier New,Courier,monospace}button,input,textarea,select{font:inherit}button{appearance:none;color:inherit;background:0 0}img{max-width:100%}.app-shell{background:var(--bg);height:100vh;color:var(--fg);padding:8px}.outer-frame{border:4px double var(--border);height:calc(100vh - 16px);padding:10px;overflow:hidden}.frame{flex-direction:column;height:100%;min-height:0;display:flex;overflow:hidden}.header-box{text-align:center;color:var(--fg);white-space:pre;flex-shrink:0;margin:0;font-size:18px;line-height:1.2;overflow:auto hidden}.frame-content{flex-direction:column;flex:1;min-height:0;padding-top:12px;display:flex;overflow:hidden}.menu-screen,.quiz-screen,.stats-screen{flex-direction:column;width:100%;height:100%;min-height:0;display:flex;overflow:hidden}.screen-scroll-area{-webkit-overflow-scrolling:touch;flex:1;min-height:0;padding-bottom:10px;overflow:auto}.menu-screen{justify-content:center;gap:18px}.menu-title{text-align:center;color:var(--highlight);letter-spacing:.2em;flex-shrink:0;margin-top:8px;margin-bottom:6px;font-size:22px}.menu-subtitle{text-align:center;flex-shrink:0;margin-bottom:6px;font-size:20px}.menu-box{border:4px double var(--border);flex-direction:column;flex-shrink:0;gap:10px;width:min(860px,96%);margin:0 auto;padding:18px;display:flex}.menu-option{text-align:left;cursor:pointer;touch-action:manipulation;border:2px solid #0000;align-items:flex-start;gap:12px;width:100%;min-height:48px;padding:12px 14px;font-size:24px;line-height:1.45;display:flex}.menu-option:hover,.menu-option:focus-visible,.quiz-option:hover,.quiz-option:focus-visible,.action-button:hover,.action-button:focus-visible{border-color:var(--highlight);outline:none}.menu-option-prefix{white-space:nowrap}.menu-option-label{white-space:normal;overflow-wrap:anywhere;min-width:0}.menu-option.active,.quiz-option.active{background:var(--fg);color:var(--bg)}.footer-bar{flex-wrap:wrap;flex-shrink:0;justify-content:space-between;gap:12px 24px;width:min(860px,96%);margin:0 auto;font-size:18px;display:flex}.footer-key{color:var(--highlight);margin-right:10px}.status-line{border-top:2px solid var(--border);flex-wrap:wrap;flex-shrink:0;justify-content:space-between;gap:12px 18px;width:min(1180px,98%);margin:auto auto 0;padding-top:10px;font-size:16px;display:flex}.action-bar{flex-wrap:wrap;flex-shrink:0;justify-content:flex-end;gap:12px;width:min(1180px,98%);margin:14px auto 0;display:flex}.action-button{border:2px solid var(--border);min-height:46px;color:var(--fg);cursor:pointer;touch-action:manipulation;padding:10px 18px}.action-button.primary{background:var(--fg);color:var(--bg)}.action-button:disabled{opacity:.6;cursor:default}.quiz-screen{justify-content:flex-start;gap:14px;padding-bottom:6px}.quiz-meta,.quiz-question-box,.quiz-media-grid,.quiz-options,.quiz-hint,.quiz-result,.quiz-explanation{width:min(1180px,98%);margin:0 auto}.quiz-meta{flex-wrap:wrap;gap:10px 18px;display:flex}.quiz-progress{font-size:18px}.quiz-question-box{border:4px double var(--border);margin-top:4px;padding:22px 28px}.quiz-question{white-space:pre-wrap;overflow-wrap:anywhere;font-size:22px;line-height:1.55}.quiz-media-grid{grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:14px;margin-top:4px;display:grid}.quiz-media-card,.quiz-media-missing{border:4px double var(--border);padding:10px}.quiz-media-card{flex-direction:column;gap:8px;display:flex}.quiz-media-image{object-fit:contain;background:#ffffff0f;width:100%;height:auto;max-height:420px;display:block}.quiz-media-caption,.quiz-media-missing{font-size:14px;line-height:1.45}.quiz-media-missing{color:var(--highlight)}.quiz-options{flex-direction:column;gap:12px;margin-top:6px;display:flex}.quiz-option{border:2px solid var(--border);text-align:left;width:100%;color:var(--fg);cursor:pointer;touch-action:manipulation;grid-template-columns:44px 1fr;align-items:start;gap:12px;padding:14px 16px;font-size:20px;line-height:1.5;display:grid}.quiz-option-label{white-space:nowrap}.quiz-option-text{white-space:pre-wrap;word-break:break-word;overflow-wrap:anywhere;min-width:0}.quiz-option.correct{color:var(--ok);border-color:var(--ok)}.quiz-option.wrong{color:var(--bad);border-color:var(--bad)}.quiz-hint{margin-top:2px;font-size:18px;line-height:1.45}.quiz-result{min-height:32px;margin-top:2px;font-size:22px;font-weight:700}.quiz-result.correct{color:var(--ok)}.quiz-result.wrong{color:var(--bad)}.quiz-explanation{border:4px double var(--border);white-space:pre-wrap;overflow-wrap:anywhere;padding:14px 18px;font-size:18px;line-height:1.55}.stats-screen{justify-content:flex-start;gap:12px}.stats-summary-box,.stats-table-box{border:4px double var(--border);width:min(1180px,98%);margin:0 auto;padding:16px 20px}.stats-summary-box{font-size:18px;line-height:1.6}.stats-table-header,.stats-table-row{grid-template-columns:minmax(0,1fr) 60px 60px 60px 72px;align-items:start;gap:12px;display:grid}.stats-table-header{color:var(--highlight);border-bottom:2px solid var(--border);margin-bottom:8px;padding-bottom:10px}.stats-table-row{border-bottom:1px solid #fff3;padding:12px 0;font-size:16px;line-height:1.5}.stats-table-row:last-child{border-bottom:0}.col-question{white-space:pre-wrap;word-break:break-word;overflow-wrap:anywhere;min-width:0}.col-small{text-align:right;white-space:nowrap}.stats-empty{padding:16px 0 4px;line-height:1.5}.highlight{color:var(--highlight)}@media (width<=900px){.app-shell{padding:4px}.outer-frame{height:calc(100vh - 8px);padding:6px}.header-box{font-size:12px;line-height:1.15}.frame-content{padding-top:8px}.menu-title{letter-spacing:.12em;margin-bottom:2px;font-size:18px}.menu-subtitle{font-size:16px}.menu-box{gap:8px;padding:12px}.menu-option{padding:12px;font-size:18px}.footer-bar,.status-line,.quiz-progress,.quiz-hint,.quiz-explanation,.stats-summary-box{font-size:15px}.quiz-question-box{padding:16px 18px}.quiz-question{font-size:18px;line-height:1.5}.quiz-option{grid-template-columns:34px 1fr;padding:12px 14px;font-size:16px}.stats-table-header,.stats-table-row{grid-template-columns:minmax(0,1fr) 42px 42px 42px 52px;gap:8px;font-size:12px}.action-bar{width:96%}.action-button{text-align:center;flex:160px}}