:root{--bg:#f4f5fb;--bg2:#eef1f8;--panel:#fff;--panel2:#f8f9fd;--line:#d9dfea;--muted:#6b7280;--text:#1f2937;--sub:#374151;--purple:#5b54f1;--purple-2:#ecebff;--purple-3:#6f69ff;--green:#12945a;--green-bg:#e7f8ef;--red:#d44c5a;--yellow:#b7791f;--yellow-bg:#fff7df;--shadow:0 20px 48px rgba(86,98,131,.10)}
*{box-sizing:border-box}html{font-size:16px}body{margin:0;background:linear-gradient(180deg,var(--bg) 0%,#f8f9fd 100%);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Noto Sans","PingFang SC","Microsoft YaHei",Arial,sans-serif;line-height:1.55}.app{max-width:1240px;margin:0 auto;padding:30px 18px 42px}header{display:flex;justify-content:space-between;gap:18px;align-items:flex-start;margin-bottom:26px;padding:10px 2px}.brand{max-width:920px}.brand-badge{display:inline-flex;align-items:center;gap:10px;padding:14px 22px;border-radius:999px;background:var(--purple-2);color:#4338ca;font-size:18px;font-weight:900;letter-spacing:-.02em;margin-bottom:28px}.brand h1{margin:0;font-size:82px;line-height:.96;letter-spacing:-.06em;color:#0f172a}.brand-quote{margin:28px 0 0;color:#64748b;font-size:28px;line-height:1.7;letter-spacing:-.02em}.brand-attribution{margin-top:22px;color:#64748b;font-size:24px;line-height:1.5;letter-spacing:-.02em}.brand-note{margin-top:22px;color:#536174;font-size:16px;max-width:900px}.controls{display:grid;grid-template-columns:1.3fr 1fr 1fr 1fr 1fr;gap:12px;margin-bottom:16px}.controls input,.controls select{width:100%;background:#fff;border:1.5px solid var(--line);border-radius:18px;color:var(--text);padding:15px 16px;font-size:16px;outline:none}.controls input:focus,.controls select:focus{border-color:var(--purple);box-shadow:0 0 0 4px rgba(91,84,241,.08)}.topline{display:flex;justify-content:space-between;gap:12px;align-items:center;margin:16px 0}.modebar,.actions{display:flex;gap:10px;flex-wrap:wrap}.btn{border:1.5px solid var(--line);background:#fff;color:var(--text);border-radius:18px;padding:12px 16px;font-weight:800;cursor:pointer;transition:.15s;font-size:15px;box-shadow:0 4px 12px rgba(86,98,131,.04)}.btn:hover{transform:translateY(-1px);border-color:#bfc8db}.btn.active,.btn.primary{background:linear-gradient(180deg,var(--purple-3),var(--purple));color:#fff;border-color:transparent;box-shadow:0 10px 24px rgba(91,84,241,.25)}.btn.ghost{background:#fff}.btn.warn{background:var(--yellow-bg);color:var(--yellow);border-color:#f0dd97}.btn.small{padding:9px 12px;font-size:14px;border-radius:14px}.layout{display:flex;flex-direction:column;gap:18px}.sidebar,.card{background:var(--panel);border:1.5px solid var(--line);border-radius:28px;box-shadow:var(--shadow)}.sidebar{padding:16px;background:linear-gradient(180deg,#fff 0%,#fbfcff 100%)}.statgrid{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-bottom:14px}.stat{background:var(--panel2);border:1px solid #e7ebf3;border-radius:18px;padding:12px 14px}.stat b{display:block;font-size:26px;color:#111827}.stat span{color:var(--muted);font-size:13px}.topiclist{display:grid;grid-template-columns:repeat(auto-fit,minmax(255px,1fr));gap:10px}.topicbtn{text-align:left;background:var(--panel2);border:1.5px solid #e5eaf4;color:var(--sub);border-radius:18px;padding:12px 13px;cursor:pointer}.topicbtn strong{display:block;color:#111827;font-size:14px;line-height:1.35}.topicbtn span{font-size:12px;color:var(--muted)}.topicbtn.active{border-color:rgba(91,84,241,.45);background:var(--purple-2);box-shadow:0 0 0 3px rgba(91,84,241,.07)}.card{min-height:560px;padding:28px;background:linear-gradient(180deg,#fff 0%,#fcfcff 100%)}.meta{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:16px}.pill{display:inline-flex;align-items:center;gap:6px;padding:7px 12px;border:1px solid #dde3ee;border-radius:999px;color:#4b5563;background:#f8f9fd;font-size:13px;font-weight:700}.pill.blue{border-color:#d7d5ff;color:#4338ca;background:#f0efff}.pill.green{border-color:#caeedc;color:#157347;background:#effcf5}.article-title{font-size:30px;line-height:1.22;margin:0 0 12px;letter-spacing:-.03em;color:#111827}.context{border-left:4px solid var(--purple);padding:14px 16px;color:var(--sub);font-size:17px;margin:14px 0 22px;background:linear-gradient(90deg,rgba(91,84,241,.07),rgba(91,84,241,.02));border-radius:0 18px 18px 0}.context.pale{border-left-color:#c7d2fe;background:#fafbff}.context b{color:#111827}.map-hero{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin:18px 0}.map-hero>div{background:#f8f9ff;border:1.5px solid #e3e7f3;border-radius:22px;padding:18px}.map-hero p{font-size:18px;margin:6px 0 0;color:#1f2937}.eyebrow{text-transform:uppercase;letter-spacing:.08em;font-size:12px;font-weight:900;color:#6b7280}.move-list{display:grid;gap:12px;margin:18px 0}.move{display:grid;grid-template-columns:42px 1fr;gap:14px;background:#fff;border:1.5px solid #e5eaf4;border-radius:22px;padding:15px}.move-num{width:42px;height:42px;border-radius:999px;background:var(--purple-2);color:#4338ca;display:grid;place-items:center;font-weight:900}.move-role{font-weight:900;color:#374151}.move p{margin:4px 0 0;color:#1f2937}.coach-box{background:#fff7df;border:1.5px solid #f0dd97;color:#725014;border-radius:20px;padding:14px 16px;margin-top:18px}.builder-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}.builder-grid h3{margin:0 0 10px}.area{border:2px dashed #d9deeb;background:var(--panel2);border-radius:24px;min-height:128px;padding:16px;margin:12px 0;display:flex;flex-wrap:wrap;gap:10px;align-content:flex-start}.builder-area{min-height:280px}.empty{color:#98a1b2;font-size:16px}.chips{display:flex;flex-wrap:wrap;gap:10px;margin:16px 0 22px}.chips.vertical{display:grid;margin:12px 0}.chip{border:1.5px solid #dbe2ef;background:#fff;color:#1f2937;border-radius:999px;padding:12px 15px;cursor:pointer;font-size:18px;font-weight:600;transition:.12s;line-height:1.35}.chip:hover,.argchip:hover{border-color:#b9c3d9;transform:translateY(-1px);background:#fafbff}.chip.used,.argchip.used{display:none}.chip.selected{background:var(--purple-2);border-color:#c8c4ff;color:#352fbf}.argchip{text-align:left;border:1.5px solid #dbe2ef;background:#fff;border-radius:18px;padding:12px 14px;cursor:pointer;display:grid;gap:4px}.argchip b{color:#111827}.argchip span{color:#4b5563;line-height:1.45}.argchip.selected{background:var(--purple-2);border-color:#c8c4ff}.sentence-preview{font-size:26px;color:#111827;line-height:1.5;margin:14px 0 18px;font-weight:650}.reconstruct-head{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap}.difficultybar{display:flex;gap:8px;align-items:center;background:#f7f8fc;border:1px solid #e5eaf3;border-radius:999px;padding:7px 9px}.difficulty-label{font-size:13px;font-weight:800;color:#64748b;margin-left:3px}.mini-toggle{border:0;background:transparent;border-radius:999px;padding:8px 12px;font-weight:900;color:#64748b;cursor:pointer}.mini-toggle.active{background:#fff;color:#4338ca;box-shadow:0 3px 12px rgba(86,98,131,.10)}.feedback{min-height:28px;font-weight:800;font-size:18px}.good{color:var(--green)}.bad{color:var(--red)}.recall-label{background:#f8f9fd;border:1px solid #e6ebf4;border-radius:18px;padding:12px 14px;color:#4b5563;margin-bottom:14px}.recall-label b{color:#111827}.recall-line{font-size:32px;line-height:2.05;margin:18px 0 26px;color:#111827;word-break:break-word}.blank{display:inline-block;min-width:170px;max-width:360px;background:transparent;border:none;border-bottom:3px solid #cfd6e3;color:#1f2937;text-align:center;font:inherit;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;outline:none;padding:0 6px 6px;margin:0 2px}.blank:focus{border-color:var(--purple)}.blank.correct{border-color:var(--green);color:var(--green)}.blank.incorrect{border-color:var(--red);color:var(--red)}details{margin-top:16px;color:var(--muted);background:#fafbff;border:1px solid #ebeff6;border-radius:18px;padding:12px 14px}summary{cursor:pointer;color:#374151;font-size:18px;font-weight:700}.source{color:#64748b;overflow-wrap:anywhere}.footer-actions{display:flex;justify-content:space-between;gap:12px;align-items:center;border-top:1px solid #ebeff5;padding-top:18px;margin-top:18px}.progress{color:var(--muted);font-size:14px;font-weight:600}.kbd{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;background:#f1f3f9;border:1px solid #d6deea;border-bottom-width:2px;border-radius:8px;padding:3px 6px;color:#111827;font-size:12px}.mobile-note{display:block;color:var(--muted);font-size:13px;margin:0 0 10px}.review{background:#f9faff;border:1px solid #e5eaf3;border-radius:20px;padding:16px;margin-top:14px}.hidden{display:none!important}.hint-banner{margin:14px 0 0;padding:12px 14px;border-radius:18px;background:#f7f8fc;border:1px dashed #d7deeb;color:#5b6475;font-size:16px}.complete-card{text-align:center;padding:52px 18px}.complete-emoji{width:72px;height:72px;margin:0 auto 18px;border-radius:999px;background:var(--green-bg);color:var(--green);display:grid;place-items:center;font-size:38px;font-weight:900}.center{justify-content:center}
@media(max-width:980px){.controls{grid-template-columns:1fr 1fr}.statgrid{grid-template-columns:repeat(2,1fr)}.map-hero,.builder-grid{grid-template-columns:1fr}}
@media(max-width:760px){header{display:block}.brand h1{font-size:54px}.brand-quote{font-size:21px}.brand-attribution{font-size:18px}.controls{grid-template-columns:1fr}.topline{display:block}.modebar{margin-bottom:10px}.card{padding:18px}.article-title{font-size:24px}.recall-line{font-size:25px;line-height:1.9}.sentence-preview{font-size:22px}.chip{font-size:16px}.footer-actions{display:block}.footer-actions .actions{margin-bottom:10px}.statgrid{grid-template-columns:1fr 1fr}.topiclist{grid-template-columns:1fr}}