:root{color-scheme:dark;--bg:#111210;--panel:#181a18;--panel-soft:#20231f;--panel-raised:#252922;--text:#f6f1e8;--muted:#aeb7ae;--line:#343b34;--accent:#8dde93;--accent-2:#8ec7ff;--danger:#ff7777;--warning:#e7c56b;--shadow:0 18px 55px rgba(0,0,0,0.24)}*{box-sizing:border-box}body{margin:0;background:linear-gradient(180deg,#171a16 0,var(--bg) 44%,#0d0f0d 100%);color:var(--text);font-family:Arial,Helvetica,sans-serif}a{color:inherit;text-decoration:none}button,input,textarea{font:inherit}.shell{min-height:100vh;padding:28px}.topbar{display:flex;justify-content:space-between;align-items:center;gap:16px;max-width:1180px;margin:0 auto 28px;border:1px solid rgba(255,255,255,.06);background:rgba(24,26,24,.74);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-radius:8px;padding:12px}.brand{font-size:20px;font-weight:700}.nav{display:flex;gap:10px}.button,.nav a,button{border:1px solid var(--line);background:var(--panel-soft);color:var(--text);border-radius:8px;padding:10px 14px;cursor:pointer;transition:border-color .14s ease,background .14s ease,transform .14s ease}.button:hover,.nav a:hover,button:hover{border-color:#52605a;background:var(--panel-raised);transform:translateY(-1px)}.button.primary,button.primary{border-color:transparent;background:var(--accent);color:#07110b;font-weight:700}.button.ghost,button.ghost{background:transparent}.page{max-width:1180px;margin:0 auto}.auth{max-width:420px;margin:80px auto;display:grid;grid-gap:14px;gap:14px;border:1px solid var(--line);background:var(--panel);border-radius:8px;padding:24px;box-shadow:var(--shadow)}.authHeader h1,.authHeader p{margin-top:0}.auth input,textarea{width:100%;border:1px solid var(--line);background:#0f1112;color:var(--text);border-radius:8px;padding:12px}.menu{display:grid;grid-gap:18px;gap:18px}.dashboardHero{border:1px solid var(--line);background:linear-gradient(135deg,rgba(141,222,147,.08),rgba(142,199,255,.06)),var(--panel);border-radius:8px;padding:clamp(24px,5vw,52px);box-shadow:var(--shadow)}.dashboardHero h1{max-width:820px;margin:0;font-size:clamp(36px,6vw,68px);line-height:.98}.heroCopy{max-width:640px;color:var(--muted);font-size:18px;line-height:1.6}.heroActions{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}.menuStats{display:grid;grid-template-columns:repeat(3,1fr);grid-gap:12px;gap:12px}.menuStats div{border:1px solid var(--line);background:#101310;border-radius:8px;padding:18px;display:grid;grid-gap:4px;gap:4px}.menuStats strong{font-size:28px}.menuStats span{color:var(--muted);font-size:13px}.menuGrid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));grid-gap:14px;gap:14px}.menuCard,.panel,.stageButton{border:1px solid var(--line);background:var(--panel);border-radius:8px;padding:18px;box-shadow:var(--shadow)}.menuCard{min-height:190px;display:grid;align-content:space-between;transition:border-color .14s ease,background .14s ease,transform .14s ease}.menuCard:hover{border-color:var(--accent-2);background:#1c201d;transform:translateY(-2px)}.menuCard span{color:var(--accent-2);font-size:12px;font-weight:700}.menuCard h2{margin-bottom:0}.menuCard p{color:var(--muted);margin:0}.primaryCard{border-color:rgba(141,222,147,.45)}.stageGrid{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));grid-gap:12px;gap:12px}.stageButton{display:grid;grid-gap:10px;gap:10px;min-height:154px;align-content:start;transition:border-color .14s ease,background .14s ease,transform .14s ease}.stageButton.unlocked:hover{border-color:var(--accent-2);background:#1d2221;transform:translateY(-2px)}.stageButton.locked{color:#69716e;pointer-events:none;background:#151718}.stageButton.cleared{border-color:var(--accent)}.muted,.stageButton small{color:var(--muted)}.stageMeta{color:var(--accent-2);font-size:12px;font-weight:700}.stageLock{width:-moz-fit-content;width:fit-content;border:1px solid var(--line);border-radius:999px;padding:4px 8px}.pageHeader{margin-bottom:22px}.pageHeader h1{margin:0;font-size:clamp(32px,5vw,52px)}.stageDetail{grid-template-columns:minmax(280px,380px) minmax(0,1fr);align-items:flex-start}.stageBrief,.stageDetail{display:grid;grid-gap:18px;gap:18px}.stageBrief{position:-webkit-sticky;position:sticky;top:24px}.backLink{color:var(--muted);width:-moz-fit-content;width:fit-content}.eyebrow{margin:0 0 6px;color:var(--accent-2);font-size:12px;font-weight:700;letter-spacing:0;text-transform:uppercase}.stageBrief h1{margin:0;font-size:30px;line-height:1.1}.targetBox{display:grid;grid-gap:8px;gap:8px;border:1px solid var(--line);background:#101312;border-radius:8px;padding:14px}.targetBox span{color:var(--muted);font-size:12px}.targetBox code{color:var(--accent);white-space:pre-wrap;word-break:break-word}.hintBox{display:grid;grid-gap:12px;gap:12px}.hintBox p{margin:0;border-left:3px solid var(--warning);padding:10px 12px;background:#171714;color:#e8dfc0}.composer,.editor{display:grid;grid-gap:12px;gap:12px}.palette{display:grid;grid-template-columns:1fr 1fr;grid-gap:14px;gap:14px}.palette h3{margin:8px 0 0;font-size:14px;color:var(--muted)}.chips{display:flex;flex-wrap:wrap;gap:6px}.chip{border:1px solid var(--line);background:#101314;border-radius:999px;padding:6px 10px;font-size:12px}.lockedChip{color:#68716e}.treeSurface{border:1px solid var(--line);background:#101312;border-radius:8px;padding:16px;overflow:auto;min-height:280px}.exprNode{display:grid;grid-gap:10px;gap:10px;align-items:flex-start;min-width:220px;max-width:560px}.exprNode select{border:1px solid var(--line);background:var(--panel-soft);color:var(--text);border-radius:8px;padding:9px 10px;width:100%}.emptyExprNode select{border-style:dashed;border-color:#56605b;color:var(--muted)}.exprChildren{display:grid;grid-gap:10px;gap:10px;margin-left:14px;padding-left:12px;border-left:1px solid var(--line)}.exprSlot{display:grid;grid-template-columns:24px minmax(180px,1fr);grid-gap:8px;gap:8px;align-items:flex-start}.slotLabel{color:var(--accent-2);font-size:12px;padding-top:10px;text-align:center}.composerHeader{display:flex;justify-content:space-between;gap:14px;align-items:flex-start}.composerHeader h2,.composerHeader p{margin-top:0}.composerHeader h2{margin-bottom:6px}.submitButton{width:-moz-fit-content;width:fit-content}.emlWorkbench{display:grid;grid-template-columns:minmax(220px,320px) minmax(0,1fr);grid-gap:14px;gap:14px}.combinerPanel,.palettePanel,.workspacePanel{border:1px solid var(--line);background:#111411;border-radius:8px;padding:14px}.combinerPanel h3,.palettePanel h3,.workspacePanel h3{margin:0 0 12px}.dragPalette{display:grid;grid-template-columns:repeat(auto-fit,minmax(92px,1fr));grid-gap:8px;gap:8px}.dragBlock{min-height:42px;padding:8px 10px;background:#20261f;border-color:#3b4641;text-align:center;cursor:-webkit-grab;cursor:grab;font-weight:700}.dragBlock:active{cursor:-webkit-grabbing;cursor:grabbing}.emlFormula{display:grid;grid-template-columns:auto auto minmax(130px,1fr) auto minmax(130px,1fr) auto;align-items:center;grid-gap:8px;gap:8px;margin-bottom:12px}.emlFormula strong{color:var(--accent)}.dropSlot{min-height:58px;border:1px dashed #56605b;background:#151918;border-radius:8px;padding:10px;display:flex;justify-content:center;align-items:center;gap:8px;color:var(--muted);text-align:center}.dropSlot.filled{border-style:solid;border-color:var(--accent-2);color:var(--text);justify-content:space-between}.dropSlot button{padding:6px 8px;font-size:12px}.workspacePanel{display:grid;grid-gap:12px;gap:12px}.workspaceHeader{display:flex;justify-content:space-between;gap:12px}.workspaceBlocks{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));grid-gap:8px;gap:8px;max-height:360px;overflow:auto}.workspaceBlock{border:1px solid var(--line);background:var(--panel-soft);border-radius:8px;padding:6px}.workspaceBlock.selected{border-color:var(--accent);box-shadow:0 0 0 1px rgba(123,216,143,.24)}.workspaceBlock button{width:100%;min-height:42px;border:0;background:transparent;text-align:left;overflow-wrap:anywhere}.emptyWorkspace{margin:0;color:var(--muted)}.submitRow{display:flex;align-items:center;flex-wrap:wrap;gap:12px}.result.ok{color:var(--accent)}.result.fail{color:var(--danger)}@media (max-width:820px){.shell{padding:16px}.topbar{align-items:flex-start;flex-direction:column}.menuStats,.stageDetail{grid-template-columns:1fr}.stageBrief{position:static}.palette{grid-template-columns:1fr}.composerHeader{flex-direction:column}.emlFormula,.emlWorkbench{grid-template-columns:1fr}}