:root{
  --bg:#0e1116;--card:#171b22;--card2:#20252e;--line:#303744;
  --text:#f5f7fa;--muted:#a5afbc;--accent:#78a8ff;--green:#69d79f;
  --yellow:#ffd36f;--red:#ff8585;--bluebg:#152033;
}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--text);font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;line-height:1.5}
.wrap{max-width:960px;margin:auto;padding:14px}
h1{margin:0;font-size:clamp(24px,4vw,34px);line-height:1.2} h2,h3{margin-top:0}
.sub,.small{color:var(--muted);font-size:13px}.hidden{display:none!important}
.top{display:flex;justify-content:space-between;gap:10px;align-items:flex-start}
.card{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:18px;margin:12px 0}
.notice{background:var(--bluebg);border:1px solid #29466f;border-radius:14px;padding:13px 15px;color:#d7e6ff}
.controls{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px}
label{display:block;color:var(--muted);font-size:12px;margin-bottom:5px}
select,input{width:100%;border:1px solid var(--line);background:var(--card2);color:var(--text);border-radius:11px;padding:10px;font:inherit}
button{border:0;border-radius:12px;background:#2b323e;color:var(--text);padding:11px 14px;font:inherit;font-weight:750;cursor:pointer}
button.primary{background:var(--accent);color:#071222} button.good{background:var(--green);color:#052116}
button.bad{background:var(--red);color:#2b0808}button:disabled{opacity:.42}
.row{display:flex;gap:8px;align-items:center;flex-wrap:wrap}.space{justify-content:space-between}
.pills{display:flex;gap:7px;flex-wrap:wrap}.pill{border-radius:999px;border:1px solid var(--line);background:var(--card2);padding:6px 10px;font-size:12px}
.progress{height:8px;background:#292f39;border-radius:999px;overflow:hidden;margin:12px 0}.progress>div{height:100%;width:0;background:var(--accent)}
.jp{font-size:clamp(22px,4.5vw,34px);font-weight:850;line-height:1.35;margin:18px 0}
.hint{background:var(--card2);border-left:4px solid var(--accent);border-radius:12px;padding:11px 13px;margin:10px 0 16px;font-size:14px}
.buildArea{min-height:64px;border:1px dashed #4b586b;border-radius:14px;padding:10px;display:flex;gap:8px;flex-wrap:wrap;background:#11151b;margin-bottom:12px}
.wordBank{display:flex;gap:8px;flex-wrap:wrap;margin:10px 0 16px}.word{background:#293241;border:1px solid #43526a;border-radius:10px;padding:9px 11px}
.word.built{background:#18304e;border-color:#355f91}
.sortable-chip{
  display:inline-flex;
  align-items:center;
  gap:7px;
  cursor:grab;
  user-select:none;
  touch-action:none;
}
.sortable-chip:active{cursor:grabbing}
.drag-handle{
  color:#9fb4d0;
  font-weight:900;
  letter-spacing:-2px;
  font-size:15px;
}
.drag-ghost{opacity:.35}
.drag-chosen{outline:2px solid var(--accent)}
.dragging{cursor:grabbing}
.empty-build{pointer-events:none}
.blankSentence{font-size:clamp(20px,4vw,29px);font-weight:800;background:#11151b;border:1px solid var(--line);border-radius:14px;padding:16px;margin:12px 0}
.blank{display:inline-block;min-width:92px;border-bottom:3px solid var(--accent);color:#bcd3ff;text-align:center}
.actions{display:flex;gap:8px;flex-wrap:wrap;margin-top:12px}.answerInput{font-size:18px}
.model{background:#11151b;border:1px solid #334052;border-radius:14px;padding:14px;margin-top:14px}.main{font-size:20px;font-weight:850}
.stats{display:grid;grid-template-columns:repeat(5,1fr);gap:8px;text-align:center}.stat{background:var(--card2);border-radius:12px;padding:11px 6px}
.stat b{display:block;font-size:22px}.stat span{font-size:11px;color:var(--muted)}
.masteryBar{height:7px;background:#2b313b;border-radius:99px;overflow:hidden}.masteryBar>div{height:100%;background:var(--green)}
.authRow{display:grid;grid-template-columns:1fr auto;gap:8px}.sync[data-kind="ok"]{color:var(--green)}.sync[data-kind="bad"]{color:var(--red)}
@media(max-width:720px){.controls{grid-template-columns:repeat(2,1fr)}.stats{grid-template-columns:repeat(3,1fr)}.wrap{padding:10px}.card{padding:14px}.authRow{grid-template-columns:1fr}}