:root{--bg: #05080d;--panel: #0b1220;--panel-2: #101a2b;--line: #ffffff14;--text: #d6f5e3;--muted: #6f8b83;--accent: #00d492;--accent-dim: #00d49233;--ok: #3dd9a0;--bad: #ff6b6b;--radius: 12px;--mono: "SFMono-Regular", Menlo, Consolas, "Liberation Mono", ui-monospace, monospace;--font: var(--mono)}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{background:var(--bg);color:var(--text);font-family:var(--font);-webkit-font-smoothing:antialiased}button{font-family:inherit}.app{min-height:100%}.muted{color:var(--muted)}.spacer{flex:1}.detail{max-width:720px;margin:0 auto;padding:24px 20px 60px}.detail-head{text-align:center;margin-bottom:30px}.detail-head h1{margin:8px 0 4px;font-size:30px;letter-spacing:-.01em}.course-emoji{font-size:34px}.course-emoji.big{font-size:46px}.stats{display:flex;gap:18px;justify-content:center;flex-wrap:wrap;margin:18px 0 12px}.stat{color:var(--muted);font-size:13px}.stat b{color:var(--accent);font-size:16px;margin-right:4px}.overall-progress{height:6px;border-radius:999px;background:var(--panel-2);overflow:hidden;max-width:360px;margin:0 auto}.overall-progress>span{display:block;height:100%;background:var(--accent);transition:width .3s ease}.section{margin-bottom:30px}.section-title{color:var(--muted);font-size:13px;text-transform:uppercase;letter-spacing:.08em;display:flex;align-items:center;gap:10px}.section-goal{font-size:13px;margin:-6px 0 10px}.section.locked{opacity:.5}.lesson-list{list-style:none;padding:0;margin:10px 0 0}.lesson-row{width:100%;display:flex;align-items:center;gap:12px;text-align:left;background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);color:var(--text);padding:14px 16px;margin:8px 0;cursor:pointer;font-size:14px;transition:border-color .12s ease}.lesson-row:hover:not(:disabled){border-color:var(--accent)}.lesson-row:disabled{cursor:not-allowed}.lesson-num{width:26px;height:26px;flex:none;display:grid;place-items:center;border-radius:999px;background:var(--panel-2);color:var(--muted);font-size:12px}.lesson-num.done{background:var(--accent-dim);color:var(--accent)}.lesson-name{flex:1}.pill{font-size:11px;padding:4px 10px;border-radius:999px;background:var(--panel-2);color:var(--muted);letter-spacing:.05em}.pill.project{background:var(--accent-dim);color:var(--accent)}.pill.lock{background:var(--panel-2);color:var(--muted)}.home-foot{margin-top:40px;text-align:center;font-size:12px}.link{background:none;border:none;color:var(--accent);cursor:pointer;font-size:13px;padding:4px}.danger{background:none;border:1px solid var(--bad);color:var(--bad);border-radius:8px;padding:5px 12px;cursor:pointer;font-size:13px}.confirm-row{display:inline-flex;align-items:center;gap:10px;flex-wrap:wrap;justify-content:center;font-size:13px}.player{min-height:100vh;display:flex;flex-direction:column}.player-topbar{display:flex;align-items:center;gap:14px;padding:14px 18px}.icon-btn{background:none;border:none;color:var(--muted);font-size:18px;cursor:pointer}.progress{flex:1;display:flex;gap:6px}.seg{flex:1;height:5px;border-radius:999px;background:var(--panel-2)}.seg.done{background:var(--accent)}.seg.active{background:var(--accent);opacity:.5}.card-area{flex:1;display:flex;justify-content:center;padding:20px}.card-area>*{width:100%;max-width:680px}.player-footer{padding:18px;display:flex;justify-content:flex-end;border-top:1px solid var(--line)}.primary{background:var(--accent);color:#04120c;border:none;border-radius:var(--radius);padding:12px 28px;font-size:14px;font-weight:700;cursor:pointer;letter-spacing:.02em}.primary:disabled{opacity:.35;cursor:default}.concept{text-align:center;padding-top:36px}.illustration{font-size:60px;margin-bottom:14px}.concept-title{margin:0 0 14px;font-size:22px}.concept-text{line-height:1.7;font-size:15px;max-width:52ch;margin:0 auto 14px;text-align:left}.concept-text code,.prompt code{background:var(--panel-2);color:var(--accent);padding:2px 6px;border-radius:5px}.concept-text strong{color:#fff}.exercise{padding-top:16px}.prompt{font-size:15px;line-height:1.6;margin-bottom:16px}.options{display:flex;flex-direction:column;gap:10px}.option{text-align:left;background:var(--panel);border:1px solid var(--line);color:var(--text);border-radius:var(--radius);padding:14px 16px;cursor:pointer;font-size:14px;line-height:1.5}.option.selected{border-color:var(--accent)}.option.correct{border-color:var(--ok);background:var(--accent-dim)}.check{margin-top:16px;background:var(--panel-2);color:var(--text);border:1px solid var(--accent);border-radius:var(--radius);padding:11px 22px;font-weight:700;cursor:pointer;font-size:14px}.check:disabled{opacity:.35;cursor:default}.check.run{display:inline-flex;align-items:center;gap:3px}.cursor{display:inline-block;width:8px;height:15px;background:var(--accent);animation:blink 1.1s step-end infinite}@keyframes blink{0%,49%{opacity:1}50%,to{opacity:0}}@media (prefers-reduced-motion: reduce){.cursor{animation:none;opacity:.6}.overall-progress>span{transition:none}.lesson-row{transition:none}}.feedback{margin-top:14px;font-weight:700;font-size:14px;line-height:1.5}.feedback.ok{color:var(--ok)}.feedback.bad{color:var(--bad)}.editor{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;margin-top:4px}.editor-tab{background:var(--panel-2);color:var(--muted);font-size:11px;padding:8px 12px;letter-spacing:.05em}.editor-body{padding:16px;min-height:84px}.assembled{font-family:var(--mono);font-size:14px;display:block}.assembled.fill{white-space:pre-wrap;line-height:2}.ghost{color:var(--muted);font-style:italic}.reset{width:100%;background:none;border:none;border-top:1px solid var(--line);color:var(--muted);padding:8px;cursor:pointer;font-size:11px}.token-tray{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}.tok{font-family:var(--mono);font-size:13px;background:var(--panel-2);border:1px solid var(--line);color:var(--text);border-radius:8px;padding:8px 12px;cursor:pointer}.tok.placed{margin-right:6px;background:var(--accent);color:#04120c;border:none}.tok:disabled{opacity:.28;cursor:default}.blank-input{font-family:var(--mono);font-size:14px;background:var(--bg);color:var(--accent);border:none;border-bottom:2px solid var(--accent);padding:1px 4px;margin:0 2px;outline:none}.cm-host{min-height:170px;max-height:380px;overflow:auto}.cm-host .cm-editor{min-height:170px}.output{margin-top:14px;background:#02050a;color:var(--text);font-family:var(--mono);font-size:13px;padding:14px;border-radius:10px;white-space:pre-wrap;border:1px solid var(--line);max-height:240px;overflow:auto;line-height:1.5}.output.err{color:#ffb4b4}.finish{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;text-align:center;padding:20px}.finish-badge{font-size:56px}.finish h2{margin:0;color:var(--accent);font-size:24px}.is-embed .detail{padding:18px 16px 24px}.is-embed .detail-head{margin-bottom:18px}.is-embed .player{min-height:0}.is-embed .card-area{padding:16px 4px}.is-embed .section{margin-bottom:16px}.embed-foot{margin-top:26px;padding-top:22px;border-top:1px solid var(--line);text-align:center}.embed-foot .primary{display:inline-block;text-decoration:none;margin-bottom:10px}.embed-foot .muted{font-size:12px;margin:0}html[data-embed="1"],html[data-embed="1"] body,html[data-embed="1"] #root{height:auto;min-height:0;overflow:visible}