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auto;height:env(safe-area-inset-top,0px);z-index:60;background:var(--bg)}#root{min-height:100%}h1,h2,h3,h4{font-family:var(--font-display);font-weight:700;letter-spacing:-.02em;line-height:1.1;margin:0;text-wrap:balance;color:var(--ink)}p{margin:0}a{color:inherit;text-decoration:none}button,input,select,textarea{font:inherit;color:inherit}button{cursor:pointer;background:none;border:0;padding:0}img,svg{display:block;max-width:100%}:focus-visible{outline:2.5px solid var(--focus);outline-offset:2px;border-radius:6px}::selection{background:var(--aqua-2);color:var(--ink)}*{scrollbar-width:thin;scrollbar-color:var(--line) transparent}.num{font-variant-numeric:tabular-nums}.muted{color:var(--ink-2)}.faint{color:var(--ink-3)}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.wrap{width:100%;max-width:1240px;margin-inline:auto;padding-left:var(--gutter-l);padding-right:var(--gutter-r)}.spin{animation:spin .9s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}@media (prefers-reduced-motion: reduce){*,*:before,*:after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important;scroll-behavior:auto!important}}.rich{display:grid;gap:.8em;min-width:0}.rich p{white-space:pre-line}.rich ul{margin:0;padding-left:1.2em;display:grid;gap:.3em}.rich u{text-decoration-thickness:1.5px;text-underline-offset:3px}.rich-h{font-weight:700}.rich-table-wrap{overflow-x:auto;max-width:100%}.rich-table{border-collapse:collapse;font-size:.93em;min-width:240px;font-family:var(--font-ui)}.rich-table th,.rich-table td{border:1px solid var(--line);padding:.45em .75em;text-align:left;font-variant-numeric:tabular-nums}.rich-table th{background:var(--surface-3);font-weight:600}.katex{font-size:1.05em}.math-block{display:block;margin:.4em 0;overflow-x:auto;overflow-y:hidden}.btn{--b-bg: var(--accent);--b-ink: var(--accent-ink);--b-line: transparent;--b-hover: 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var(--aqua-2)}.theme-admin .btn-soft{--b-hover: var(--sky-2)}.btn-danger{--b-bg: var(--bad);--b-ink: var(--surface);--b-hover: var(--bad)}.btn-danger:hover:not(:disabled){filter:brightness(.92)}.icon-btn{display:inline-grid;place-items:center;width:36px;height:36px;border-radius:10px;color:var(--ink-2);flex:none;transition:background .2s,color .2s}.icon-btn:hover{background:var(--surface-3);color:var(--ink)}.icon-btn.sm{width:28px;height:28px;border-radius:8px}.icon-btn:disabled{opacity:.4;cursor:not-allowed}.field{display:grid;gap:6px;min-width:0}.field-label{font-size:13px;font-weight:600;color:var(--ink-2)}.field-hint{font-size:12.5px;color:var(--ink-3)}.field-error{font-size:12.5px;color:var(--bad);font-weight:500}.input,.select,.textarea{width:100%;min-width:0;border:1px solid var(--line);background:var(--surface);border-radius:var(--radius-s);padding:10px 12px;font-size:14.5px;color:var(--ink);transition:border-color .2s,box-shadow 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var(--ink-3);border-radius:5px;display:inline-grid;place-items:center;background:var(--surface);flex:none;cursor:pointer;transition:background .15s,border-color .15s}.check:checked,.check:indeterminate{background:var(--accent);border-color:var(--accent)}.check:checked:after{content:"";width:9px;height:5px;border:2px solid var(--accent-ink);border-top:0;border-right:0;transform:translateY(-1px) rotate(-45deg)}.check:indeterminate:after{content:"";width:9px;height:2px;border-radius:1px;background:var(--accent-ink)}.check:disabled{opacity:.45;cursor:not-allowed}.radio{border-radius:50%}.radio:checked:after{width:8px;height:8px;border:0;border-radius:50%;background:var(--accent-ink);transform:none}.seg{display:inline-flex;padding:3px;gap:2px;background:var(--surface-3);border:1px solid var(--line-soft);border-radius:999px;max-width:100%;overflow-x:auto}.seg-item{position:relative;padding:7px 15px;border-radius:999px;font-size:13.5px;font-weight:600;color:var(--ink-2);white-space:nowrap;transition:color .2s}.seg-item.on{color:var(--ink)}.seg-item:disabled{opacity:.45;cursor:not-allowed}.seg-pill{position:absolute;top:0;right:0;bottom:0;left:0;border-radius:999px;background:var(--surface);box-shadow:var(--shadow-1)}.seg-label{position:relative;display:inline-flex;align-items:center;gap:6px}.seg-sm .seg-item{padding:5px 11px;font-size:12.5px}.badge{display:inline-flex;align-items:center;gap:5px;height:22px;padding:0 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.2s}.chip:hover{border-color:var(--accent);color:var(--ink)}.chip.on{background:var(--accent-soft);border-color:transparent;color:var(--accent);font-weight:600}.chip-count{font-variant-numeric:tabular-nums;color:var(--ink-3);font-weight:500}.diff{display:inline-flex;align-items:center;gap:6px;font-size:12.5px;font-weight:600;color:var(--ink-2);white-space:nowrap}.diff-bars{display:inline-flex;align-items:flex-end;gap:2px;height:12px}.diff-bars i{width:3px;border-radius:2px;background:var(--line)}.diff-bars i:nth-child(1){height:5px}.diff-bars i:nth-child(2){height:8.5px}.diff-bars i:nth-child(3){height:12px}.diff[data-d=E] i:nth-child(1),.diff[data-d=M] i:nth-child(-n+2),.diff[data-d=H] i{background:var(--accent)}.panel{background:var(--surface);border:1px solid var(--line-soft);border-radius:var(--radius-l);padding:22px;min-width:0}.panel-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:16px;flex-wrap:wrap}.panel-title{font-family:var(--font-display);font-size:17px;font-weight:700;letter-spacing:-.01em}.callout{display:flex;gap:10px;padding:12px 14px;border-radius:var(--radius-m);background:var(--sky-2);color:var(--ink);font-size:14px;align-items:flex-start}.callout svg{flex:none;margin-top:2px}.callout-warn{background:var(--warn-soft)}.callout-bad{background:var(--bad-soft)}.empty{display:grid;justify-items:start;gap:10px;padding:28px;border:1.5px dashed var(--line);border-radius:var(--radius-l);background:var(--surface-2)}.empty h3{font-size:18px}.empty 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img{width:100%;height:100%;object-fit:cover}.table-wrap{overflow-x:auto;border:1px solid var(--line-soft);border-radius:var(--radius-m);background:var(--surface)}.table{width:100%;border-collapse:separate;border-spacing:0;font-size:14px}.table th{position:sticky;top:0;z-index:1;background:var(--surface-2);text-align:left;font-weight:600;font-size:12.5px;color:var(--ink-2);padding:10px 14px;border-bottom:1px solid var(--line);white-space:nowrap}.table td{padding:12px 14px;border-bottom:1px solid var(--line-soft);vertical-align:middle}.table tr:last-child td{border-bottom:0}.table tbody tr{transition:background .15s}.table tbody tr.clickable{cursor:pointer}.table tbody tr.clickable:hover{background:var(--surface-2)}.table tbody tr.is-selected{background:var(--accent-soft)}.cell-clip{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;max-width:46ch}.modal-root{position:fixed;top:0;right:0;bottom:0;left:0;z-index:100;display:grid;place-items:center;padding:max(16px,env(safe-area-inset-top,0px)) var(--gutter-r) max(16px,env(safe-area-inset-bottom,0px)) var(--gutter-l)}.modal-scrim{position:absolute;top:0;right:0;bottom:0;left:0;background:var(--scrim);-webkit-backdrop-filter:blur(3px);backdrop-filter:blur(3px)}.modal{position:relative;width:100%;max-width:560px;max-height:100%;display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line-soft);border-radius:var(--radius-l);box-shadow:var(--shadow-3);overflow:hidden}.modal-sm{max-width:440px}.modal-lg{max-width:820px}.modal-xl{max-width:1120px}.modal-head{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:18px 18px 10px 22px}.modal-head h2{font-size:19px}.modal-body{padding:4px 22px 20px;overflow:auto;min-height:0}.modal-foot{display:flex;justify-content:flex-end;flex-wrap:wrap;gap:10px;padding:14px 18px;border-top:1px solid var(--line-soft);background:var(--surface-2)}.popover{position:absolute;z-index:70;min-width:220px;padding:6px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-m);box-shadow:var(--shadow-3)}.menu-item{display:flex;align-items:center;gap:10px;width:100%;padding:9px 10px;border-radius:8px;font-size:14px;color:var(--ink);text-align:left}.menu-item:hover{background:var(--surface-3)}.menu-sep{height:1px;margin:6px 4px;background:var(--line-soft)}.toast-host{position:fixed;z-index:200;right:var(--gutter-r);bottom:max(16px,env(safe-area-inset-bottom,0px));display:grid;gap:8px;width:min(380px,calc(100vw - 32px));pointer-events:none}.toast{pointer-events:auto;display:flex;align-items:flex-start;gap:10px;padding:12px 10px 12px 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.2s,border-color .2s}.side-switch:hover{color:var(--ink);border-color:var(--accent)}.side-foot{margin-top:auto;display:grid;gap:10px;padding-top:14px;border-top:1px solid var(--line-soft)}.side-user{display:flex;align-items:center;gap:10px;min-width:0;padding:0 4px}.side-user-text{display:grid;min-width:0}.side-user-text strong{font-size:14px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.side-user-text span,.side-note{font-size:12px;color:var(--ink-3)}.side-note{padding:0 4px}.side-actions{display:flex;align-items:center;justify-content:space-between;gap:6px}.topbar{display:none}.main{min-width:0;padding:30px var(--gutter-r) 72px 36px}.page{max-width:1180px;margin:0 auto;display:grid;gap:24px;min-width:0}.main-banner{max-width:1180px;margin:0 auto 18px}.drawer-scrim{position:fixed;top:0;right:0;bottom:0;left:0;z-index:80;background:var(--scrim)}.drawer{position:fixed;inset:0 auto 0 0;z-index:81;width:min(300px,86vw);overflow-y:auto;padding:max(18px,env(safe-area-inset-top,0px)) 14px max(18px,env(safe-area-inset-bottom,0px)) max(14px,env(safe-area-inset-left,0px));background:var(--surface);box-shadow:var(--shadow-3)}.drawer-close{position:absolute;top:max(14px,env(safe-area-inset-top,0px));right:10px;z-index:2}@media (max-width: 900px){.shell{grid-template-columns:minmax(0,1fr)}.sidebar{display:none}.topbar{position:sticky;top:env(safe-area-inset-top,0px);z-index:40;display:flex;align-items:center;justify-content:space-between;height:60px;padding-left:var(--gutter-l);padding-right:var(--gutter-r);background:color-mix(in srgb,var(--bg) 88%,transparent);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-bottom:1px solid var(--line-soft)}.main{padding:20px var(--gutter-r) 64px var(--gutter-l)}}.page-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;flex-wrap:wrap}.page-head h1{font-size:clamp(26px,3.2vw,36px)}.page-head 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var(--rb-line)}.rn-single{width:100%;min-height:0;overflow:auto}.rn-single-inner{max-width:800px;margin:0 auto;padding:28px clamp(18px,3vw,32px) 56px;display:grid;gap:18px}.rn-foot{position:relative;z-index:20;display:grid;grid-template-columns:minmax(0,1fr) auto minmax(0,1fr);align-items:center;gap:12px;min-height:66px;padding:10px 20px;border-top:1px solid var(--rb-line);background:var(--rb-bg)}.rn-name{min-width:0;font-size:14px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.rn-qpill{display:inline-flex;align-items:center;gap:8px;padding:9px 16px;border-radius:8px;background:var(--rb-pill);color:var(--rb-pill-ink);font-weight:700;font-size:14px;white-space:nowrap}.rn-nav{display:flex;justify-content:flex-end;gap:8px}.rn-btn{height:42px;padding:0 22px;border-radius:999px;background:var(--rb-sel);color:var(--rb-bg);font-weight:700;font-size:14.5px;white-space:nowrap;transition:filter .2s,transform .15s}.rn-btn:hover:not(:disabled){filter:brightness(1.08)}.rn-btn:active:not(:disabled){transform:scale(.97)}.rn-btn:disabled{opacity:.42;cursor:not-allowed}.rn-btn.ghost{background:transparent;color:var(--rb-sel);border:1.5px solid var(--rb-sel)}.rn-navpop{position:absolute;bottom:calc(100% + 12px);left:50%;z-index:30;width:min(600px,calc(100vw - 24px));padding:18px 18px 14px;border-radius:14px;background:var(--rb-bg);color:var(--rb-ink);border:1px solid var(--rb-line);box-shadow:var(--shadow-3)}.rn-navpop h3,.rn-review h2{font-family:var(--font-ui);letter-spacing:0;text-align:center}.rn-navpop h3{font-size:15.5px}.rn-legend{display:flex;justify-content:center;flex-wrap:wrap;gap:8px 18px;padding:10px 0 12px;border-bottom:1px solid var(--rb-line);font-size:12.5px}.rn-legend span{display:inline-flex;align-items:center;gap:6px}.rn-legend i{width:14px;height:14px;border-radius:3px;border:1.5px dashed var(--rb-ink-2)}.rn-legend i.a{border-style:solid;border-color:var(--rb-sel);background:var(--rb-sel)}.rn-grid{display:flex;flex-wrap:wrap;justify-content:center;gap:12px 10px;padding:18px 4px 12px}.rn-cell{position:relative;width:40px;height:40px;display:grid;place-items:center;border-radius:6px;border:1.5px dashed var(--rb-ink-2);color:var(--rb-sel);font-weight:700;font-size:14px;font-variant-numeric:tabular-nums;transition:transform .15s}.rn-cell:hover{transform:translateY(-2px)}.rn-cell.answered{border-style:solid;border-color:var(--rb-sel);background:var(--rb-sel);color:var(--rb-bg)}.rn-cell .flag{position:absolute;top:-8px;right:-7px;color:var(--bad)}.rn-cell .pin{position:absolute;top:-15px;left:50%;transform:translate(-50%);color:var(--rb-ink)}.rn-navpop-foot{display:flex;justify-content:center;padding-top:6px}.rn-review{width:100%;overflow:auto}.rn-review-inner{max-width:760px;margin:0 auto;padding:36px clamp(18px,3vw,32px) 56px;display:grid;gap:18px;text-align:center}.rn-review h2{font-size:26px}.rn-review p{color:var(--rb-ink-2)}.rn-review-card{padding:20px;border-radius:14px;border:1px solid var(--rb-line);box-shadow:var(--shadow-2);text-align:left}.rn-review-card .rn-grid{justify-content:flex-start}.rn-center{width:100%;overflow:auto;display:grid;place-items:center;padding:32px max(16px,env(safe-area-inset-right,0px)) 32px max(16px,env(safe-area-inset-left,0px))}.rn-card{width:min(560px,100%);display:grid;gap:16px;justify-items:center;padding:32px 28px;border-radius:20px;background:var(--surface);color:var(--ink);border:1px solid var(--line-soft);box-shadow:var(--shadow-3);text-align:center}.rn-card h2{font-size:26px}.rn-card p{color:var(--ink-2);max-width:44ch}.rn-break-clock{font-family:var(--font-display);font-size:64px;font-weight:800;letter-spacing:-.03em;font-variant-numeric:tabular-nums;line-height:1}.rn-tutor{display:grid;gap:14px}.rn-progress{position:absolute;left:0;right:0;bottom:-2px;height:2px;background:transparent}.rn-progress span{display:block;height:100%;background:var(--rb-sel);transition:width .4s var(--ease)}@media (max-width: 900px){.rn-split{display:block;overflow:auto}.rn-pane{overflow:visible;padding:20px var(--gutter-r) 20px var(--gutter-l)}.rn-pane+.rn-divider+.rn-pane{border-top:1px solid var(--rb-line);padding-bottom:48px}.rn-divider{display:none}.rn-head{padding:8px var(--gutter-r) 8px var(--gutter-l);grid-template-columns:minmax(0,1fr) auto auto}.rn-tool{min-width:0}.rn-tool span{display:none}.rn-foot{padding:10px var(--gutter-r) 10px var(--gutter-l);grid-template-columns:auto minmax(0,1fr)}.rn-name{display:none}.rn-btn{padding:0 16px}}@media (min-width: 1100px){.runner.calc-open .rn-single-inner{margin-left:max(372px,calc((100% - 800px)/2))}}.calc{position:fixed;z-index:96;top:96px;left:max(20px,env(safe-area-inset-left,0px));width:330px;border-radius:16px;overflow:hidden;background:var(--surface);color:var(--ink);border:1px solid var(--line);box-shadow:var(--shadow-3)}.calc-head{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:6px 6px 6px 14px;background:var(--surface-3);cursor:grab;touch-action:none;-webkit-user-select:none;user-select:none;font-weight:700;font-size:13.5px}.calc-head:active{cursor:grabbing}.calc-screen{display:grid;gap:4px;padding:12px 14px 10px;text-align:right}.calc-hist{max-height:64px;overflow:auto;font-size:12px;color:var(--ink-3);font-variant-numeric:tabular-nums}.calc-input{width:100%;border:0;outline:none;background:transparent;color:var(--ink);text-align:right;font-size:19px;font-variant-numeric:tabular-nums}.calc-result{min-height:34px;overflow-x:auto;font-size:26px;font-weight:700;font-variant-numeric:tabular-nums;white-space:nowrap}.calc-result.err{font-size:14px;font-weight:600;color:var(--bad);padding-top:8px}.calc-keys{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:6px;padding:10px;background:var(--surface-2)}.calc-key{height:40px;border-radius:9px;background:var(--surface);border:1px solid var(--line-soft);font-weight:600;font-size:14px;transition:background .15s,transform .1s}.calc-key:hover{background:var(--surface-3)}.calc-key:active{transform:scale(.96)}.calc-key.op{background:var(--surface-3)}.calc-key.eq{grid-column:span 2;background:var(--accent);color:var(--accent-ink);border-color:transparent}.calc-foot{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:8px 12px;border-top:1px solid var(--line-soft);font-size:12.5px}@media (max-width: 640px){.calc{left:max(8px,env(safe-area-inset-left,0px))!important;right:max(8px,env(safe-area-inset-right,0px));top:auto!important;bottom:calc(76px + env(safe-area-inset-bottom,0px));width:auto;transform:none!important}}.ref-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(100%,220px),1fr));gap:12px}.ref-item{display:grid;gap:6px;padding:14px;border-radius:12px;border:1px solid var(--line-soft);background:var(--surface-2)}.ref-item strong{font-size:13.5px}.ref-notes{margin-top:14px;display:grid;gap:6px;font-size:14px}body:has(.runner) .toast-host{bottom:calc(78px + env(safe-area-inset-bottom,0px))}