:root,:root[data-theme=dark]{--bg: #0b0d12;--bg-raised: #141821;--bg-elev: #1a1f2b;--bg-code: #0f1219;--border: #232937;--border-strong: #323a4c;--text: #e9ecf3;--text-dim: #a0a8ba;--text-faint: #6c7489;--accent: #8b7bff;--accent-2: #5b9dff;--accent-soft: rgba(139, 123, 255, .16);--grad: linear-gradient(135deg, #8b7bff 0%, #5b9dff 100%);--ok: #34d399;--warn: #fbbf24;--bad: #f87171;--probe: #a78bfa;--btn-fg: #ffffff;--btn-ok-fg: #052e1c;--btn-bad-fg: #2a0b0b;--line-hover: #1a1f2a;--line-probed: #1f1b33;--line-selected: #1a2440;--line-bug: #3a1a1e;--line-fix: #12291f;--probe-panel: #19162b;--d-add: rgba(52, 211, 153, .12);--d-del: rgba(248, 113, 113, .12);--info-bg: #142038;--info-bd: #27467d;--info-fg: #b3cdff;--warn-bg: #2b2410;--warn-bd: #6b5a1c;--warn-fg: #f6df9d;--bad-bg: #2c1416;--bad-bd: #7a2c33;--bad-fg: #ffbcbc;--ok-bg: #0f2a1f;--ok-bd: #22684b;--ok-fg: #a7f0cf;--shadow: 0 1px 0 rgba(255,255,255,.03) inset, 0 8px 24px rgba(0,0,0,.35);--shadow-lg: 0 18px 50px rgba(0,0,0,.45);--hl-kw: #c4a7ff;--hl-str: #8ee6b4;--hl-num: #ffb86b;--hl-com: #6c7489;--hl-fn: #7cc4ff;--hl-bi: #ff9ec7;--hl-lit: #ffb86b;--mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, "JetBrains Mono", Consolas, monospace;--sans: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", "PingFang TC", "Noto Sans TC", "Microsoft JhengHei", sans-serif;--r: 16px;--r-sm: 12px}:root[data-theme=light]{--bg: #f4f5fa;--bg-raised: #ffffff;--bg-elev: #f8f9fc;--bg-code: #f7f8fc;--border: #e3e6ef;--border-strong: #cdd2df;--text: #121624;--text-dim: #4c5569;--text-faint: #7e8699;--accent: #5b4bff;--accent-2: #2f6fe8;--accent-soft: rgba(91, 75, 255, .1);--grad: linear-gradient(135deg, #6a5bff 0%, #2f80ff 100%);--ok: #0e9f6e;--warn: #b7791f;--bad: #e5484d;--probe: #6d3fd4;--btn-fg: #ffffff;--btn-ok-fg: #ffffff;--btn-bad-fg: #ffffff;--line-hover: #eef1f8;--line-probed: #f0ecfd;--line-selected: #e7eeff;--line-bug: #fdecec;--line-fix: #e6f6ee;--probe-panel: #f7f4fe;--d-add: #e6f7ee;--d-del: #fdeced;--info-bg: #ecf2ff;--info-bd: #bcd0fb;--info-fg: #173d75;--warn-bg: #fff6e5;--warn-bd: #f0d08f;--warn-fg: #6d4405;--bad-bg: #fdeeee;--bad-bd: #f3c0c0;--bad-fg: #8f1f22;--ok-bg: #e8f7ef;--ok-bd: #b2dfc6;--ok-fg: #12583a;--shadow: 0 1px 2px rgba(16,24,40,.04), 0 6px 18px rgba(16,24,40,.06);--shadow-lg: 0 18px 44px rgba(16,24,40,.12);--hl-kw: #7c3aed;--hl-str: #0a7f4f;--hl-num: #b45309;--hl-com: #8a93a6;--hl-fn: #1d5fd1;--hl-bi: #c0267a;--hl-lit: #b45309}@media(prefers-color-scheme:light){:root:not([data-theme]){--bg: #f4f5fa;--bg-raised: #ffffff;--bg-elev: #f8f9fc;--bg-code: #f7f8fc;--border: #e3e6ef;--border-strong: #cdd2df;--text: #121624;--text-dim: #4c5569;--text-faint: #7e8699;--accent: #5b4bff;--accent-2: #2f6fe8;--accent-soft: rgba(91, 75, 255, .1);--grad: linear-gradient(135deg, #6a5bff 0%, #2f80ff 100%);--ok: #0e9f6e;--warn: #b7791f;--bad: #e5484d;--probe: #6d3fd4;--btn-fg: #ffffff;--btn-ok-fg: #ffffff;--btn-bad-fg: #ffffff;--line-hover: #eef1f8;--line-probed: #f0ecfd;--line-selected: #e7eeff;--line-bug: #fdecec;--line-fix: #e6f6ee;--probe-panel: #f7f4fe;--d-add: #e6f7ee;--d-del: #fdeced;--info-bg: #ecf2ff;--info-bd: #bcd0fb;--info-fg: #173d75;--warn-bg: #fff6e5;--warn-bd: #f0d08f;--warn-fg: #6d4405;--bad-bg: #fdeeee;--bad-bd: #f3c0c0;--bad-fg: #8f1f22;--ok-bg: #e8f7ef;--ok-bd: #b2dfc6;--ok-fg: #12583a;--shadow: 0 1px 2px rgba(16,24,40,.04), 0 6px 18px rgba(16,24,40,.06);--shadow-lg: 0 18px 44px rgba(16,24,40,.12);--hl-kw: #7c3aed;--hl-str: #0a7f4f;--hl-num: #b45309;--hl-com: #8a93a6;--hl-fn: #1d5fd1;--hl-bi: #c0267a;--hl-lit: #b45309}}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:var(--sans);font-size:15px;line-height:1.6;-webkit-font-smoothing:antialiased}button{font-family:inherit;font-size:inherit;cursor:pointer}.app{max-width:1180px;margin:0 auto;padding:0 20px 80px}.topbar{display:flex;align-items:center;gap:24px;padding:16px 0;border-bottom:1px solid var(--border);margin-bottom:24px;flex-wrap:wrap}.brand{font-weight:700;letter-spacing:.5px;font-size:17px}.brand span{color:var(--text-faint);font-weight:400;font-size:13px;margin-left:8px}.tabs{display:flex;gap:4px}.tab{background:none;border:1px solid transparent;color:var(--text-dim);padding:6px 14px;border-radius:6px}.tab:hover{color:var(--text);background:var(--bg-raised)}.tab.active{color:var(--text);background:var(--bg-raised);border-color:var(--border-strong)}.tab kbd{margin-left:6px}.theme-toggle{background:var(--bg-raised);border:1px solid var(--border);color:var(--text-dim);border-radius:6px;padding:5px 11px;font-size:13px}.theme-toggle:hover{color:var(--text);border-color:var(--border-strong)}.daily-chip{display:flex;align-items:center;gap:8px;background:var(--bg-raised);border:1px solid var(--border);border-radius:6px;padding:5px 11px;font-size:13px;font-family:var(--mono);color:var(--text-dim)}.daily-chip:hover{border-color:var(--border-strong);color:var(--text)}.daily-chip .streak{color:var(--warn);font-weight:700}.daily-chip .done{color:var(--ok);font-weight:700}.help-panel{border-color:var(--border-strong)}.help-panel kbd{margin-right:3px}kbd{font-family:var(--mono);font-size:11px;background:var(--bg-code);border:1px solid var(--border-strong);border-bottom-width:2px;border-radius:4px;padding:1px 5px;color:var(--text-dim)}.card{background:var(--bg-raised);border:1px solid var(--border);border-radius:10px;padding:18px 20px;margin-bottom:16px;box-shadow:var(--shadow)}.card h2{margin:0 0 12px;font-size:15px;letter-spacing:.3px}.card h3{margin:0 0 8px;font-size:13px;color:var(--text-dim);font-weight:600}.grid2{display:grid;grid-template-columns:1fr 1fr;gap:16px}.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}@media(max-width:860px){.grid2,.grid3{grid-template-columns:1fr}}.symptom{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.symptom>div{background:var(--bg-code);border:1px solid var(--border);border-radius:8px;padding:10px 12px}.symptom .label{font-size:11px;color:var(--text-faint);text-transform:uppercase;letter-spacing:.6px}.symptom .value{font-family:var(--mono);font-size:13px;margin-top:4px;word-break:break-all}.symptom .expected .value{color:var(--ok)}.symptom .actual .value{color:var(--bad)}@media(max-width:700px){.symptom{grid-template-columns:1fr}}.code{background:var(--bg-code);border:1px solid var(--border);border-radius:8px;overflow-x:auto;font-family:var(--mono);font-size:13.5px;line-height:1.75}.code-line{display:flex;white-space:pre}.code-line .ln{flex:0 0 46px;text-align:right;padding-right:12px;color:var(--text-faint);-webkit-user-select:none;user-select:none;border-right:1px solid var(--border);margin-right:12px}.code-line .src{flex:1;padding-right:16px}.code.clickable .code-line{cursor:pointer}.code.clickable .code-line:hover{background:var(--line-hover)}.code.clickable .code-line:hover .ln{color:var(--accent)}.code-line.probed{background:var(--line-probed)}.code-line.probed .ln{color:var(--probe);font-weight:700}.code-line.selected{background:var(--line-selected);box-shadow:inset 2px 0 0 var(--accent)}.code-line.cursor{outline:1px dashed var(--accent);outline-offset:-1px}.code-line.cursor .ln{color:var(--accent);font-weight:700}.code-line.reveal-bug{background:var(--line-bug);box-shadow:inset 2px 0 0 var(--bad)}.code-line.reveal-fix{background:var(--line-fix);box-shadow:inset 2px 0 0 var(--ok)}.code-line.locked{cursor:not-allowed}.code-line.pruned{opacity:.38;text-decoration:line-through}.code-line.prune-right{background:var(--line-fix);opacity:.5;text-decoration:line-through}.code-line.prune-wrong{background:var(--line-bug);box-shadow:inset 2px 0 0 var(--bad);opacity:1;text-decoration:none}.code-line.prune-missed{background:var(--warn-bg);box-shadow:inset 2px 0 0 var(--warn)}.swatch{display:inline-block;width:10px;height:10px;border-radius:2px;margin-right:5px}.swatch.right{background:var(--ok)}.swatch.wrong{background:var(--bad)}.swatch.missed{background:var(--warn)}.probe-result{border:1px solid var(--probe);background:var(--probe-panel);border-radius:8px;padding:12px 14px;margin-top:12px;font-family:var(--mono);font-size:12.5px}.probe-result .step{padding:6px 0;border-bottom:1px dashed var(--border)}.probe-result .step:last-child{border-bottom:none}.probe-result .step-click{cursor:pointer;padding-left:6px;border-left:2px solid transparent}.probe-result .step-click:hover{background:var(--line-hover)}.probe-result .step-click.active{border-left-color:var(--accent);background:var(--line-selected)}.probe-result .vars{color:var(--text-dim)}.probe-result .vars b{color:var(--text);font-weight:600}label{display:block;font-size:12px;color:var(--text-dim);margin-bottom:5px}input[type=text],textarea{width:100%;background:var(--bg-code);border:1px solid var(--border-strong);border-radius:6px;color:var(--text);padding:9px 11px;font-family:var(--sans);font-size:14px}input[type=text]:focus,textarea:focus{outline:none;border-color:var(--accent)}textarea{resize:vertical;min-height:62px}.btn{background:var(--accent);border:none;color:var(--btn-fg);font-weight:700;padding:9px 18px;border-radius:6px}.btn:disabled{background:var(--border-strong);color:var(--text-faint);cursor:not-allowed}.btn.ghost{background:none;border:1px solid var(--border-strong);color:var(--text-dim);font-weight:500}.btn.ghost:hover:not(:disabled){color:var(--text);border-color:var(--text-faint)}.btn.danger{background:var(--bad);color:var(--btn-bad-fg)}.btn.ok{background:var(--ok);color:var(--btn-ok-fg)}.row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.spacer{flex:1}.notice{border-radius:8px;padding:11px 14px;font-size:13.5px;margin-bottom:14px;border:1px solid}.notice.info{background:var(--info-bg);border-color:var(--info-bd);color:var(--info-fg)}.notice.warn{background:var(--warn-bg);border-color:var(--warn-bd);color:var(--warn-fg)}.notice.bad{background:var(--bad-bg);border-color:var(--bad-bd);color:var(--bad-fg)}.notice.ok{background:var(--ok-bg);border-color:var(--ok-bd);color:var(--ok-fg)}.lang-bar{display:flex;gap:6px;justify-content:center;flex-wrap:wrap;margin-bottom:14px}.lang-chip{background:var(--bg-raised);border:1px solid var(--border);color:var(--text-dim);border-radius:999px;padding:4px 12px;font-size:12.5px}.lang-chip:hover{color:var(--text);border-color:var(--border-strong)}.lang-chip.active{color:var(--text);border-color:var(--accent);background:var(--line-selected)}.snap-stage{text-align:center;padding:8px 0 0}.snap-code{text-align:left;margin:0 auto 20px;max-width:720px}.timer{font-family:var(--mono);font-size:40px;font-weight:700;letter-spacing:-1px;margin:6px 0 2px}.timer.good{color:var(--ok)}.timer.late{color:var(--bad)}.timer-hint{color:var(--text-faint);font-size:12px;margin-bottom:18px}.snap-actions{display:flex;gap:14px;justify-content:center}.snap-actions .btn{min-width:168px;padding:13px 20px;font-size:15px}@media(max-width:420px){.snap-actions{gap:10px}.snap-actions .btn{min-width:0;flex:1;padding:13px 8px}.topbar{gap:12px}}.streak-dots{display:flex;gap:7px;justify-content:center;margin-top:16px}.dot{width:11px;height:11px;border-radius:50%;background:var(--border-strong)}.dot.on{background:var(--ok)}.beacon-options{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;max-width:560px;margin:0 auto}.beacon-opt{padding:14px 16px;font-size:15px;text-align:left}@media(max-width:520px){.beacon-options{grid-template-columns:1fr}}.metric{background:var(--bg-code);border:1px solid var(--border);border-radius:8px;padding:14px}.metric .k{font-size:11.5px;color:var(--text-faint);text-transform:uppercase;letter-spacing:.6px}.metric .v{font-size:27px;font-weight:700;font-family:var(--mono);margin-top:3px}.metric .sub{font-size:12px;color:var(--text-dim);margin-top:2px}table{width:100%;border-collapse:collapse;font-size:13.5px}th,td{text-align:left;padding:8px 10px;border-bottom:1px solid var(--border)}th{color:var(--text-faint);font-weight:600;font-size:11.5px;text-transform:uppercase;letter-spacing:.5px}td.mono{font-family:var(--mono)}.bar{height:6px;background:var(--border);border-radius:3px;overflow:hidden;min-width:70px}.bar>i{display:block;height:100%;background:var(--accent)}.bar>i.ok{background:var(--ok)}.bar>i.warn{background:var(--warn)}.bar>i.bad{background:var(--bad)}.cond-tag{font-size:12px;padding:1px 6px;border-radius:4px;background:var(--line-selected);color:var(--text-dim)}.cond-tag b{color:var(--accent)}.exec-summary .sum-row{margin:3px 0;line-height:1.7}.exec-summary .breakdown-title{color:inherit;opacity:.75}.breakdown,.ops{border:1px solid var(--border);background:var(--bg-code);border-radius:8px;padding:12px 14px;margin-top:12px}.breakdown-title{font-size:11.5px;color:var(--text-faint);text-transform:uppercase;letter-spacing:.6px;margin-bottom:8px}.bd-row{display:flex;align-items:baseline;gap:8px;padding:5px 0;font-size:13.5px;border-bottom:1px dashed var(--border)}.bd-row:last-child{border-bottom:none}.bd-row.final{border-top:1px solid var(--border-strong);margin-top:4px;padding-top:9px}.bd-row.final .bd-val{color:var(--ok);font-weight:700}.bd-expr{color:var(--text-dim);flex:1;word-break:break-all}.bd-eq{color:var(--text-faint)}.bd-val{color:var(--text);font-weight:600}.op-row{display:flex;gap:10px;padding:5px 0;font-size:13.5px;align-items:baseline}.op-name{color:var(--probe);flex:0 0 128px;font-size:12.5px}.op-desc{color:var(--text-dim);flex:1}.op-desc b{color:var(--text)}@media(max-width:620px){.op-row{flex-direction:column;gap:2px}.op-name{flex:none}}.spark{margin-top:8px}.spark svg{width:100%;height:28px;display:block;overflow:visible}.spark-line{fill:none;stroke:var(--accent);stroke-width:2;stroke-linecap:round;stroke-linejoin:round;vector-effect:non-scaling-stroke}.spark-dot{fill:var(--accent);stroke:var(--bg-code);stroke-width:2}.spark-foot{display:flex;justify-content:space-between;align-items:baseline;margin-top:4px;font-size:11.5px}.spark-delta{font-family:var(--mono);color:var(--text-faint)}.spark-delta.up{color:var(--ok)}.spark-delta.down{color:var(--bad)}.spark-empty{padding:10px 0 2px;font-size:12px}.trend{display:flex;align-items:flex-end;gap:2px;height:46px;margin-top:4px}.trend-col{flex:1;height:100%;display:flex;align-items:flex-end;cursor:default}.trend-track{width:100%;height:100%;display:flex;align-items:flex-end}.trend-bar{width:100%;background:var(--accent);border-radius:3px 3px 0 0;min-height:2px;transition:opacity .12s}.trend-bar.empty{background:var(--border-strong);border-radius:2px}.trend-col:hover .trend-bar{opacity:.75}.pill{display:inline-block;font-size:11px;padding:2px 8px;border-radius:999px;border:1px solid var(--border-strong);color:var(--text-dim)}.pill.mastered{border-color:var(--ok);color:var(--ok)}.muted{color:var(--text-dim);font-size:13px}.faint{color:var(--text-faint);font-size:12.5px}.mono{font-family:var(--mono)}.explain{white-space:pre-wrap;line-height:1.75;font-size:14px}.loading{color:var(--text-faint);padding:40px 0;text-align:center}html{-webkit-text-size-adjust:100%}body{font-size:16px;line-height:1.6}button{-webkit-tap-highlight-color:transparent}:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px}.dim{color:var(--text-dim)}.small{font-size:13px}.c-ok{color:var(--ok)}.c-warn{color:var(--warn)}.c-accent{color:var(--accent)}.c-dim{color:var(--text-faint)}.icon{flex:none}.shell{min-height:100vh;min-height:100dvh}.main{max-width:720px;margin:0 auto;padding:16px 16px calc(96px + env(safe-area-inset-bottom))}.shell.focus .main{padding-bottom:40px}.shell.wide .main{max-width:1180px}.appbar h1{font-size:28px;letter-spacing:-.02em;margin:10px 2px 18px}.sidenav{display:none}.tabbar{position:fixed;left:0;right:0;bottom:0;z-index:30;display:grid;grid-template-columns:repeat(4,1fr);padding:6px 8px calc(6px + env(safe-area-inset-bottom));background:color-mix(in srgb,var(--bg-raised) 82%,transparent);backdrop-filter:saturate(1.6) blur(16px);-webkit-backdrop-filter:saturate(1.6) blur(16px);border-top:1px solid var(--border)}.tabbar button{display:flex;flex-direction:column;align-items:center;gap:2px;background:none;border:0;color:var(--text-faint);font-size:11.5px;padding:6px 0;border-radius:12px;transition:color .15s}.tabbar button.on{color:var(--accent)}.tabbar button.on .icon{transform:translateY(-1px)}@media(min-width:900px){.shell:not(.focus){display:grid;grid-template-columns:232px 1fr}.tabbar{display:none}.sidenav{display:flex;flex-direction:column;gap:4px;position:sticky;top:0;height:100vh;padding:22px 14px;border-right:1px solid var(--border);background:var(--bg-raised)}.main{padding:28px 28px 60px;width:100%}.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:17px;margin:0 8px 22px}.nav-item{display:flex;align-items:center;gap:12px;padding:10px 12px;border-radius:12px;background:none;border:0;color:var(--text-dim);font-size:15px;text-align:left}.nav-item:hover{background:var(--bg-elev);color:var(--text)}.nav-item.on{background:var(--accent-soft);color:var(--accent);font-weight:600}}.brand-mark{display:inline-grid;place-items:center;width:30px;height:30px;border-radius:9px;background:var(--grad);color:#fff;font:700 12px var(--mono)}.boot{min-height:100vh;display:grid;place-items:center}.boot-logo{width:64px;height:64px;border-radius:18px;display:grid;place-items:center;background:var(--grad);color:#fff;font:700 20px var(--mono);animation:pulse 1.2s ease-in-out infinite}.card-xl{background:var(--bg-raised);border:1px solid var(--border);border-radius:var(--r);padding:18px;margin-bottom:14px;box-shadow:var(--shadow)}.card-xl h3,.card-head h3{margin:0 0 12px;font-size:15px}.card-head{display:flex;align-items:baseline;justify-content:space-between;gap:10px}.section-title{font-size:13px;text-transform:uppercase;letter-spacing:.08em;color:var(--text-faint);margin:22px 4px 10px}.btn-primary,.btn-ghost{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:48px;padding:0 22px;border-radius:14px;font-size:16px;font-weight:600;transition:transform .08s ease,box-shadow .2s,background .2s}.btn-primary{background:var(--grad);color:#fff;border:0;box-shadow:0 8px 22px color-mix(in srgb,var(--accent) 35%,transparent)}.btn-primary:active{transform:scale(.98)}.btn-primary.wide{width:100%}.btn-ghost{background:var(--bg-elev);color:var(--text);border:1px solid var(--border)}.btn-ghost:active{transform:scale(.98)}.icon-btn{width:40px;height:40px;display:grid;place-items:center;border-radius:12px;background:var(--bg-elev);border:1px solid var(--border);color:var(--text-dim)}.banner{display:flex;align-items:center;gap:8px;padding:10px 12px;border-radius:12px;font-size:14px;margin:10px 0;border:1px solid transparent}.banner.info{background:var(--info-bg);border-color:var(--info-bd);color:var(--info-fg)}.banner.bad{background:var(--bad-bg);border-color:var(--bad-bd);color:var(--bad-fg)}.tag{display:inline-block;font-size:12px;padding:1px 8px;border-radius:999px;margin-left:8px;font-weight:600}.tag.ok{background:var(--ok-bg);color:var(--ok-fg)}.tag.bad{background:var(--bad-bg);color:var(--bad-fg)}.ic{font-family:var(--mono);font-size:.9em;background:var(--bg-code);border:1px solid var(--border);border-radius:5px;padding:0 5px;word-break:break-word}.skeleton{height:280px;border-radius:var(--r);background:linear-gradient(90deg,var(--bg-raised),var(--bg-elev),var(--bg-raised));background-size:200% 100%;animation:shimmer 1.2s infinite}.empty-state{text-align:center;color:var(--text-dim);display:flex;flex-direction:column;align-items:center;gap:10px;padding:34px 18px}@keyframes shimmer{to{background-position:-200% 0}}@keyframes pulse{50%{opacity:.55}}@keyframes fadeIn{0%{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}@keyframes fadeUp{0%{opacity:0;transform:translateY(16px)}to{opacity:1;transform:none}}.fade-in{animation:fadeIn .25s ease both}.fade-up{animation:fadeUp .32s cubic-bezier(.2,.8,.2,1) both}@media(prefers-reduced-motion:reduce){.fade-in,.fade-up,.skeleton,.boot-logo{animation:none}}.ring{position:relative;flex:none}.ring-track{stroke:var(--border)}.ring-fill{stroke:var(--accent);transition:stroke-dashoffset .6s cubic-bezier(.2,.8,.2,1)}.ring-fill.done{stroke:var(--ok)}.ring-center{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center}.ring-big{font-size:34px;font-weight:800;letter-spacing:-.03em;line-height:1}.ring-big small{font-size:16px;color:var(--text-faint);font-weight:600}.ring-label{font-size:12px;color:var(--text-faint);margin-top:4px}.home-hero{display:flex;align-items:flex-end;justify-content:space-between;margin:8px 2px 16px}.home-hero h1{font-size:30px;margin:0;letter-spacing:-.02em}.eyebrow{margin:0;color:var(--text-faint);font-size:13px}.streak-pill{display:flex;align-items:center;gap:4px;padding:6px 12px;border-radius:999px;font-weight:700;background:color-mix(in srgb,var(--warn) 14%,transparent);color:var(--warn)}.today-card{display:flex;align-items:center;gap:20px;padding:20px}.today-side h2{font-size:19px;margin:0 0 4px}.today-side p{margin:0 0 14px;font-size:14px}@media(max-width:420px){.today-card{flex-direction:column;text-align:center}.today-side .btn-primary{width:100%}}.mode-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}.mode-card{display:flex;flex-direction:column;align-items:flex-start;gap:2px;text-align:left;padding:16px;border-radius:var(--r);border:1px solid var(--border);background:var(--bg-raised);color:var(--text);box-shadow:var(--shadow);transition:transform .1s,border-color .2s}.mode-card:active{transform:scale(.98)}.mode-card:hover{border-color:var(--border-strong)}.mode-icon{width:40px;height:40px;border-radius:12px;display:grid;place-items:center;margin-bottom:8px;color:#fff}.mode-name{font-weight:700;font-size:16px}.mode-hint{font-size:13px;color:var(--text-dim)}.mode-stat{font-size:12px;color:var(--text-faint);margin-top:6px;font-family:var(--mono)}.k-trace .mode-icon{background:linear-gradient(135deg,#6366f1,#8b5cf6)}.k-snap .mode-icon{background:linear-gradient(135deg,#f59e0b,#f97316)}.k-hunt .mode-icon{background:linear-gradient(135deg,#ef4444,#ec4899)}.k-review .mode-icon{background:linear-gradient(135deg,#10b981,#0ea5e9)}.list-card{background:var(--bg-raised);border:1px solid var(--border);border-radius:var(--r);overflow:hidden;box-shadow:var(--shadow)}.list-card.flat{box-shadow:none;border:0;background:none}.list-row{display:flex;align-items:center;gap:10px;width:100%;padding:13px 14px;text-align:left;background:none;border:0;border-bottom:1px solid var(--border);color:var(--text);font-size:14.5px}.list-row:last-child{border-bottom:0}.list-row:hover{background:var(--bg-elev)}.list-main{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical}.list-go{color:var(--text-faint)}.q-kind{display:inline-flex;align-items:center;gap:5px;flex:none;font-size:12px;font-weight:600;padding:3px 9px;border-radius:999px;background:var(--bg-elev);color:var(--text-dim)}.q-kind.k-trace{color:#8b7bff;background:#8b7bff21}.q-kind.k-snap{color:#f59e0b;background:#f59e0b21}.q-kind.k-hunt{color:#f472b6;background:#f472b621}.q-kind.k-review{color:#10b981;background:#10b98121}.practice{max-width:720px;margin:0 auto}.p-head{display:flex;align-items:center;gap:12px;margin:2px 0 14px;scroll-margin-top:10px}.round-dots{flex:1;display:flex;gap:6px}.round-dots i{flex:1;height:6px;border-radius:3px;background:var(--border);transition:background .3s}.round-dots i.cur{background:color-mix(in srgb,var(--accent) 45%,var(--border))}.round-dots i.ok{background:var(--ok)}.round-dots i.bad{background:var(--bad)}.kind-chip{display:inline-flex;align-items:center;gap:5px;font-size:13px;color:var(--text-dim);font-weight:600}.q-card{background:var(--bg-raised);border:1px solid var(--border);border-radius:var(--r);padding:14px;box-shadow:var(--shadow)}.q-card.loading-dim{opacity:.5}.q-meta{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin-bottom:12px}.q-badge{font-size:12px;font-weight:600;padding:3px 9px;border-radius:999px;color:var(--warn);background:color-mix(in srgb,var(--warn) 14%,transparent)}.q-src{font-size:12px;color:var(--text-faint);font-family:var(--mono)}.ai-note{font-size:12px;color:var(--text-faint);margin-top:8px}.q-prompt{font-size:17px;font-weight:650;line-height:1.55;margin:18px 2px 12px}.codeblock{background:var(--bg-code);border:1px solid var(--border);border-radius:var(--r-sm);overflow:hidden}.cb-scroll{overflow-x:auto;padding:10px 0;font:13.5px/1.62 var(--mono)}.cb-line{display:flex;white-space:pre;min-width:max-content;padding-right:14px}.cb-ln{min-width:2.6em;flex:none;text-align:right;padding-right:12px;color:var(--text-faint);-webkit-user-select:none;user-select:none;opacity:.7}.cb-src{flex:1;tab-size:4}.cb-line.m-bug{background:var(--line-bug);box-shadow:inset 3px 0 0 var(--bad)}.cb-line.m-wrong{background:var(--warn-bg);box-shadow:inset 3px 0 0 var(--warn)}.diff-head{display:flex;flex-wrap:wrap;gap:4px 10px;padding:8px 12px;border-bottom:1px solid var(--border);background:var(--bg-elev);font:12px var(--mono)}.diff-file{color:var(--text);font-weight:600;word-break:break-all}.diff-ctx{color:var(--text-faint)}.d-sign{width:1.2em;flex:none;color:var(--text-faint);-webkit-user-select:none;user-select:none}.cb-line.d-add{background:var(--d-add)}.cb-line.d-add .d-sign{color:var(--ok)}.cb-line.d-del{background:var(--d-del)}.cb-line.d-del .d-sign{color:var(--bad)}.cb-line.d-del .cb-src{opacity:.85}.hljs-keyword,.hljs-meta .hljs-keyword,.hljs-selector-tag{color:var(--hl-kw)}.hljs-string,.hljs-regexp,.hljs-template-string,.hljs-char{color:var(--hl-str)}.hljs-number,.hljs-literal{color:var(--hl-num)}.hljs-comment,.hljs-quote,.hljs-meta{color:var(--hl-com);font-style:italic}.hljs-title,.hljs-title.function_,.hljs-function .hljs-title{color:var(--hl-fn)}.hljs-built_in,.hljs-type,.hljs-title.class_{color:var(--hl-bi)}.hljs-attr,.hljs-variable.language_,.hljs-params{color:var(--text)}.symptom-card{background:var(--bg-elev);border:1px solid var(--border);border-radius:var(--r-sm);padding:10px 12px;margin-bottom:10px;font-size:14px}.sym-call code{font-family:var(--mono);font-weight:600;word-break:break-all}.sym-row{display:flex;align-items:baseline;gap:10px;margin-top:6px}.sym-row code{font-family:var(--mono);word-break:break-all}.sym-k{flex:none;font-size:12px;font-weight:700;padding:1px 8px;border-radius:999px}.sym-k.ok{color:var(--ok-fg);background:var(--ok-bg)}.sym-k.bad{color:var(--bad-fg);background:var(--bad-bg)}.steps{display:flex;align-items:center;gap:8px;margin:16px 2px 0;font-size:13px;color:var(--text-faint);font-weight:600}.steps i{flex:1;height:1px;background:var(--border)}.steps .on{color:var(--accent)}.steps .done{color:var(--ok)}.hyp-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}.hyp-chip{display:flex;align-items:center;gap:10px;min-height:56px;padding:10px 12px;text-align:left;border-radius:14px;border:1px solid var(--border-strong);background:var(--bg-raised);color:var(--text);font-size:15px;font-weight:600;transition:transform .08s,border-color .15s}.hyp-chip:active{transform:scale(.97);border-color:var(--accent)}.hyp-picked{font-size:14px;color:var(--text-dim);margin:14px 2px 0}.hyp-why{font-size:14px;display:grid;gap:6px;margin-bottom:10px}.hyp-why .ok{color:var(--ok-fg)}.hyp-why .bad{color:var(--bad-fg)}.center{text-align:center}.opts{display:flex;flex-direction:column;gap:10px}.opt{border:1.5px solid var(--border);border-radius:14px;background:var(--bg-raised);overflow:hidden;transition:border-color .2s,background .2s,opacity .2s}.opt-btn{display:flex;align-items:center;gap:12px;width:100%;min-height:56px;padding:12px 14px;background:none;border:0;color:var(--text);text-align:left;font-size:16px;transition:transform .08s}.opt-btn:not(:disabled):hover{background:var(--bg-elev)}.opt-btn:not(:disabled):active{transform:scale(.985)}.opt-btn:disabled{cursor:default}.opt-letter{flex:none;width:30px;height:30px;border-radius:10px;display:grid;place-items:center;font-size:13px;font-weight:700;color:var(--text-dim);background:var(--bg-elev);border:1px solid var(--border)}.opt-text{flex:1;word-break:break-word}.opt-text.mono{font-family:var(--mono);font-size:15px}.opt-mark{flex:none}.opt-why{padding:0 14px 13px 56px;font-size:14.5px;line-height:1.7;color:var(--text-dim)}.opt.right{border-color:var(--ok);background:var(--ok-bg)}.opt.right .opt-letter{background:var(--ok);border-color:var(--ok);color:var(--btn-ok-fg)}.opt.right .opt-mark,.opt.right .opt-why{color:var(--ok-fg)}.opt.wrong{border-color:var(--bad);background:var(--bad-bg);animation:shake .32s}.opt.wrong .opt-letter{background:var(--bad);border-color:var(--bad);color:var(--btn-bad-fg)}.opt.wrong .opt-mark,.opt.wrong .opt-why{color:var(--bad-fg)}.opt.dim{opacity:.82}@keyframes shake{25%{transform:translate(-4px)}75%{transform:translate(4px)}}@media(prefers-reduced-motion:reduce){.opt.wrong{animation:none}}.result{margin-top:16px;background:var(--bg-raised);border:1px solid var(--border);border-radius:var(--r);padding:16px;box-shadow:var(--shadow)}.verdict{display:flex;align-items:center;gap:8px;font-size:17px;margin-bottom:10px;padding:10px 14px;border-radius:14px;background:var(--bg-raised);border:1px solid var(--border);box-shadow:var(--shadow-lg)}.verdict.ok{color:var(--ok);border-color:var(--ok-bd)}.verdict.bad{color:var(--bad);border-color:var(--bad-bd)}.verdict-sub{margin-left:auto;font-size:13px;color:var(--text-faint)}.point{display:flex;gap:10px;padding:12px;border-radius:12px;background:var(--accent-soft);font-size:15px;line-height:1.65}.point>span{flex:none;font-size:12px;font-weight:700;color:var(--accent);padding-top:2px}.explain-text{font-size:14.5px;line-height:1.75;color:var(--text-dim);margin:12px 2px 0}.sticky-cta{position:sticky;bottom:0;z-index:5;padding:14px 0 calc(14px + env(safe-area-inset-bottom));background:linear-gradient(to bottom,transparent,var(--bg) 40%);margin-top:8px}.summary{display:flex;flex-direction:column;align-items:center;text-align:center;padding:30px 20px}.summary h2{margin:18px 0 4px;font-size:22px}.summary p{margin:2px 0}.summary-actions{display:flex;flex-direction:column;gap:10px;width:100%;max-width:320px;margin-top:20px}.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-bottom:14px}@media(max-width:560px){.stat-grid{grid-template-columns:1fr 1fr}}.stat{background:var(--bg-raised);border:1px solid var(--border);border-radius:var(--r);padding:14px;display:flex;flex-direction:column;gap:2px;box-shadow:var(--shadow)}.stat b{font-size:26px;letter-spacing:-.02em}.stat span{font-size:12.5px;color:var(--text-faint)}.bars{display:grid;grid-template-columns:repeat(14,minmax(0,1fr));gap:5px;height:130px;align-items:end}.bar-col{display:flex;flex-direction:column;align-items:center;height:100%;gap:4px}.bar-track{height:104px;width:100%;display:flex;align-items:flex-end}.bar-fill{width:100%;background:var(--bad);border-radius:6px 6px 3px 3px;display:flex;align-items:flex-end;overflow:hidden;opacity:.85}.bar-fill.is-empty{background:var(--border);opacity:1}.bar-ok{width:100%;background:var(--ok)}.bar-day{font-size:10.5px;color:var(--text-faint);font-family:var(--mono)}.legend{display:flex;align-items:center;gap:6px;font-size:12px;color:var(--text-faint);margin-top:10px}.legend i{width:10px;height:10px;border-radius:3px;display:inline-block;margin-left:8px}.lg-ok{background:var(--ok)}.lg-all{background:var(--bad)}.kind-row{display:grid;grid-template-columns:98px minmax(0,1fr) 48px;grid-template-areas:"k m p" "k s s";align-items:center;gap:2px 12px;padding:8px 0;border-bottom:1px solid var(--border)}.kind-row:last-of-type{border-bottom:0}.kind-row .q-kind{grid-area:k}.meter{grid-area:m;height:8px;background:var(--border);border-radius:4px;overflow:hidden}.meter i{display:block;height:100%;background:var(--grad);border-radius:4px}.kind-pct{grid-area:p;font-family:var(--mono);text-align:right}.kind-sub{grid-area:s}.segmented{display:grid;grid-template-columns:repeat(3,1fr);background:var(--bg-elev);border:1px solid var(--border);border-radius:12px;padding:3px}.segmented button{background:none;border:0;color:var(--text-dim);padding:9px 4px;border-radius:9px;font-size:14px}.segmented button.on{background:var(--bg-raised);color:var(--text);font-weight:600;box-shadow:var(--shadow)}.row-link{display:flex;align-items:center;gap:12px;width:100%;padding:12px 2px;background:none;border:0;color:var(--text);font-size:15px;text-align:left;border-bottom:1px solid var(--border)}.row-link:last-child{border-bottom:0}.row-link>span:nth-of-type(2){margin-left:auto;text-align:right}.row-link.static{cursor:default}.row-link.danger{color:var(--bad)}.chev{margin-left:auto;transform:rotate(180deg);transition:transform .2s;color:var(--text-faint)}.chev.open{transform:rotate(270deg)}.install-help{font-size:14px;padding:4px 2px 10px}.install-help p{margin:6px 0}.kbdish{font-family:var(--mono)}.legacy-list .row-link>span:nth-of-type(1){min-width:84px}.legacy-head{display:flex;align-items:center;gap:12px;margin-bottom:16px;font-weight:600}.login{max-width:420px;margin:0 auto;padding:14vh 20px 40px;text-align:center}.login .brand-mark{width:64px;height:64px;border-radius:20px;font-size:20px;margin-bottom:14px}.login h1{margin:0 0 4px;font-size:28px;letter-spacing:-.02em}.login .lead{color:var(--text-dim);margin:0 0 28px}.login .btn-primary{width:100%}.login .card-xl{text-align:left}.login .faint{margin-top:12px}.login-wait{display:flex;align-items:center;gap:8px;color:var(--text-dim);font-size:14px}.login-wait .pulse-dot{width:10px;height:10px;border-radius:50%;background:var(--accent);animation:pulse 1.2s ease-in-out infinite}@media(max-width:620px){.cb-scroll{font-size:12.5px}.cb-line{min-width:0;white-space:normal;padding-right:10px}.cb-src{white-space:pre-wrap;overflow-wrap:anywhere;min-width:0;tab-size:4;padding-left:var(--ind, 2ch);text-indent:calc(-1 * var(--ind, 2ch))}.cb-ln{min-width:2.2em;padding-right:8px}.q-card{padding:12px}}.guess-toggle{display:flex;align-items:center;gap:10px;width:100%;margin:-2px 0 12px;padding:9px 12px;border-radius:12px;border:1px dashed var(--border-strong);background:none;color:var(--text-dim);font-size:14px;text-align:left;transition:background .15s,border-color .15s,color .15s}.guess-toggle .faint{margin-left:auto;font-size:12px}.guess-toggle.on{border-style:solid;border-color:var(--warn);color:var(--warn);background:color-mix(in srgb,var(--warn) 10%,transparent)}.gt-box{width:20px;height:20px;border-radius:6px;border:1.5px solid currentColor;display:grid;place-items:center;flex:none}.guess-note{font-size:13px;color:var(--warn);margin:-4px 2px 10px}.link-btn{background:none;border:0;padding:10px 2px 0;color:var(--accent);font-size:14px;text-decoration:underline;text-underline-offset:3px}.link-btn:disabled{color:var(--text-faint);text-decoration:none;cursor:default}.code-hidden{display:grid;place-items:center;min-height:140px;border-radius:var(--r-sm);border:1px dashed var(--border-strong);color:var(--text-faint);font-size:14px;background:var(--bg-code);text-align:center;padding:16px}.read-gate .btn-primary{margin-top:4px}.row-text{display:flex;flex-direction:column;text-align:left}.row-text small{color:var(--text-faint);font-size:12.5px}.switch{margin-left:auto;width:44px;height:26px;border-radius:13px;background:var(--border-strong);position:relative;flex:none;transition:background .2s}.switch i{position:absolute;top:3px;left:3px;width:20px;height:20px;border-radius:50%;background:#fff;transition:transform .2s;box-shadow:0 1px 3px #0000004d}.switch.on{background:var(--accent)}.switch.on i{transform:translate(18px)}.insight-row{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-top:12px}.insight{background:var(--bg-elev);border:1px solid var(--border);border-radius:12px;padding:10px;display:flex;flex-direction:column;gap:2px}.insight b{font-size:20px;font-family:var(--mono)}.insight span{font-size:12px;color:var(--text-faint)}.insight.warn b{color:var(--bad)}.miss-badge{display:inline-block;font-size:11px;font-weight:700;color:var(--bad-fg);background:var(--bad-bg);border-radius:6px;padding:0 6px;margin-right:6px;vertical-align:1px}.k-beacon .mode-icon{background:linear-gradient(135deg,#06b6d4,#6366f1)}.q-kind.k-beacon{color:#22d3ee;background:#22d3ee21}.mode-grid>.mode-card:last-child:nth-child(odd){grid-column:1 / -1}.q-prompt.top{margin:2px 2px 12px;font-size:16.5px}.kbd-tip{text-align:center;font-size:12.5px;color:var(--text-faint);margin:14px 0 0}kbd,.kbd-hint{font:600 11px/1 var(--mono);padding:3px 6px;border-radius:6px;border:1px solid var(--border);border-bottom-width:2px;background:var(--bg-raised);color:var(--text-dim)}.btn-primary .kbd-hint{margin-left:10px;background:#ffffff2e;border-color:#ffffff59;color:#fff}@media(hover:none),(max-width:899px){.kbd-hint,.kbd-tip{display:none}}@media(min-width:1100px){.shell.focus .main,.shell.focus .practice{max-width:1280px}.p-body{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(0,1fr);gap:28px;align-items:start}.p-left{position:sticky;top:16px;max-height:calc(100vh - 32px);overflow:auto;border-radius:var(--r)}.p-right>.fade-in>.q-prompt:first-child,.p-right>.steps:first-child{margin-top:4px}.p-right .sticky-cta{background:linear-gradient(to bottom,transparent,var(--bg) 30%)}}.p-right>.fade-in>.guess-toggle:first-child{margin-top:14px}@media(min-width:1100px){.p-right>.fade-in>.guess-toggle:first-child{margin-top:0}}@media(max-width:620px){.codeblock.diff .cb-ln{display:none}.codeblock.diff .d-sign{padding-left:6px}}