:root{--paper:#f7f5f0;--surface:#fff;--surface-2:#f0ede5;--ink:#1f1d19;--ink-2:#4a463e;--muted:#6f6a5f;--rule:#e2ddd1;--rule-strong:#cbc4b4;--accent:#2c5a4c;--accent-ink:#fff;--accent-soft:#e3ece7;--accent-hover:#23493d;--focus:#b5791f;--good:#2f6b3d;--good-soft:#e4efe5;--warn:#8a5a0b;--warn-soft:#f7ecd6;--bad:#a03a2c;--bad-soft:#f7e3df;--shadow:0 1px 2px #2820140f, 0 2px 8px #2820140d;--shadow-pop:0 2px 4px #2820140f, 0 12px 32px -6px #28201429;--font-body:system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;--font-display:var(--font-body);--font-mono:ui-monospace, "Cascadia Mono", "SF Mono", Menlo, Consolas, monospace;--radius:8px;--radius-lg:10px;--gutter:16px;--measure:68ch;color-scheme:light}:root[data-theme=dark]{--paper:#161512;--surface:#1f1d19;--surface-2:#26241f;--ink:#ece8df;--ink-2:#cfc9bc;--muted:#a39d90;--rule:#34312a;--rule-strong:#4a463c;--accent:#7fb8a4;--accent-ink:#10201a;--accent-soft:#22332d;--accent-hover:#98c9b7;--focus:#e0a64a;--good:#8cc79a;--good-soft:#1f3324;--warn:#e2b660;--warn-soft:#3a2f18;--bad:#ec8f7f;--bad-soft:#3d2420;--shadow:0 1px 2px #0000004d;--shadow-pop:0 2px 4px #0000004d, 0 14px 36px -6px #0000008c;color-scheme:dark}*,:before,:after{box-sizing:border-box}html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scrollbar-gutter:stable}body{background:var(--paper);color:var(--ink);font:16px/1.55 var(--font-body);-webkit-font-smoothing:antialiased;margin:0}h1,h2,h3,h4{font-family:var(--font-display);letter-spacing:-.02em;text-wrap:balance;margin:0 0 .5em;font-weight:650;line-height:1.2}h1{font-size:clamp(1.6rem,1.3rem + 1.2vw,2.1rem)}h2{font-size:clamp(1.2rem,1.1rem + .5vw,1.4rem)}h3{letter-spacing:-.01em;font-size:1.05rem}p{margin:0 0 1em}a{color:var(--accent);text-underline-offset:.18em;text-decoration-thickness:1px}a:hover{color:var(--accent-hover)}img,svg{max-width:100%}hr{border:0;border-top:1px solid var(--rule);margin:2rem 0}small,.small{font-size:.875rem}.muted{color:var(--muted)}.mono,.num{font-family:var(--font-mono);font-variant-numeric:tabular-nums}.num{font-family:inherit}:focus-visible{outline:3px solid var(--focus);outline-offset:2px;border-radius:4px}.skip-link{z-index:100;background:var(--surface);border-radius:var(--radius);padding:8px 12px;position:absolute;top:8px;left:-9999px}.skip-link:focus{left:8px}.sr-only{clip:rect(0 0 0 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important}}.wrap{width:100%;max-width:1200px;padding:0 var(--gutter);margin:0 auto}.wrap-narrow{max-width:720px}.stack>*+*{margin-top:var(--stack,1rem)}.row{flex-wrap:wrap;align-items:center;gap:.75rem;display:flex}.row-between{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:.75rem;display:flex}.grid{grid-template-columns:repeat(auto-fill, minmax(min(100%, var(--min,260px)), 1fr));gap:1rem;display:grid}.card{background:var(--surface);border:1px solid var(--rule);border-radius:var(--radius-lg);box-shadow:var(--shadow);padding:1.1rem 1.25rem}.card>:last-child{margin-bottom:0}.card-quiet{background:var(--surface-2);border:1px solid var(--rule);border-radius:var(--radius-lg);padding:1rem 1.25rem}.badge{background:var(--surface-2);color:var(--ink-2);border:1px solid var(--rule);white-space:nowrap;border-radius:999px;align-items:center;gap:.3em;padding:.15em .6em;font-size:.78rem;font-weight:600;display:inline-flex}.badge-good{background:var(--good-soft);color:var(--good);border-color:#0000}.badge-warn{background:var(--warn-soft);color:var(--warn);border-color:#0000}.badge-bad{background:var(--bad-soft);color:var(--bad);border-color:#0000}.badge-accent{background:var(--accent-soft);color:var(--accent);border-color:#0000}.alert{border-radius:var(--radius);border:1px solid var(--rule);background:var(--surface-2);padding:.75rem 1rem}.alert-good{background:var(--good-soft);color:var(--ink);border-color:#0000}.alert-warn{background:var(--warn-soft);color:var(--ink);border-color:#0000}.alert-bad{background:var(--bad-soft);color:var(--ink);border-color:#0000}.alert>:last-child{margin-bottom:0}.btn{border-radius:var(--radius);border:1px solid var(--rule-strong);background:var(--surface);min-height:40px;color:var(--ink);font:600 .92rem/1.2 var(--font-body);cursor:pointer;white-space:nowrap;justify-content:center;align-items:center;gap:.5em;padding:.5rem 1rem;text-decoration:none;transition:background .15s,border-color .15s;display:inline-flex}.btn:hover{background:var(--surface-2);color:var(--ink)}.btn-primary{background:var(--accent);border-color:var(--accent);color:var(--accent-ink)}.btn-primary:hover{background:var(--accent-hover);border-color:var(--accent-hover);color:var(--accent-ink)}.btn-danger{color:var(--bad);border-color:var(--bad);background:0 0}.btn-danger:hover{background:var(--bad-soft);color:var(--bad)}.btn-quiet{color:var(--accent);background:0 0;border-color:#0000;padding-inline:.6rem}.btn-quiet:hover{background:var(--accent-soft);color:var(--accent)}.btn-sm{min-height:34px;padding:.3rem .7rem;font-size:.85rem}.btn[disabled],.btn[aria-disabled=true]{opacity:.55;cursor:not-allowed}.btn-block{width:100%}.field{gap:.35rem;min-width:0;display:grid}.field+.field{margin-top:1rem}.grid>.field,.row>.field,.inline-form>.field{margin-top:0}.field label,.label{font-size:.92rem;font-weight:600}.field .hint{color:var(--muted);font-size:.85rem}.field .error{color:var(--bad);font-size:.85rem}.input,select.input,textarea.input{border:1px solid var(--rule-strong);border-radius:var(--radius);background:var(--surface);width:100%;min-height:40px;color:var(--ink);font:inherit;padding:.5rem .75rem}textarea.input{resize:vertical;min-height:88px}.input.input-sm{padding-block:.25rem;width:auto;min-height:34px;padding-left:.65rem;font-size:.88rem}select.input{-webkit-appearance:none;appearance:none;cursor:pointer;background-image:linear-gradient(45deg, transparent 50%, var(--muted) 50%), linear-gradient(135deg, var(--muted) 50%, transparent 50%);background-position:calc(100% - 1.15rem) 52%,calc(100% - .8rem) 52%;background-repeat:no-repeat;background-size:.36rem .36rem;padding-right:2.4rem}.select-trigger{text-align:left;cursor:pointer;justify-content:space-between;align-items:center;gap:.6rem;min-width:0;padding-right:.7rem;transition:border-color .12s,box-shadow .12s;display:flex}.select-trigger:hover:not(:disabled){border-color:var(--muted)}.select-trigger[data-state=open]{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}.input.select-trigger:focus{border-color:var(--rule-strong);outline:none}.input.select-trigger[data-state=open]{border-color:var(--accent)}.input.select-trigger:focus-visible{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}.select-trigger:disabled{opacity:.55;cursor:not-allowed}.select-trigger[data-placeholder] .select-value{color:var(--muted)}.select-value{text-overflow:ellipsis;white-space:nowrap;flex:1;min-width:0;overflow:hidden}.select-chevron{color:var(--muted);flex:none;transition:transform .16s;display:inline-flex}.select-trigger[data-state=open] .select-chevron{color:var(--accent);transform:rotate(180deg)}.select-panel{z-index:60;min-width:var(--radix-select-trigger-width,100%);max-height:min(340px, var(--radix-select-content-available-height,340px));background:var(--surface);border:1px solid var(--rule-strong);border-radius:var(--radius-lg);box-shadow:var(--shadow-pop);transform-origin:var(--radix-select-content-transform-origin,top center);animation:.14s cubic-bezier(.22,1,.36,1) pop-in;overflow:hidden}.select-panel[data-side=top]{animation-name:pop-in-up}.select-viewport{padding:.3rem}.select-panel>.select-viewport{max-height:inherit;overflow-y:auto}.select-item{color:var(--ink);cursor:pointer;user-select:none;border-radius:6px;outline:none;justify-content:space-between;align-items:center;gap:1rem;padding:.5rem .65rem .5rem .75rem;font-size:.95rem;line-height:1.35;display:flex;position:relative}.select-item[data-highlighted]{background:var(--accent-soft)}.select-item[data-state=checked]{color:var(--accent);font-weight:600}.select-item[data-disabled]{color:var(--muted);cursor:default}.select-check{color:var(--accent);flex:none;display:inline-flex}.select-scroll{color:var(--muted);cursor:default;justify-content:center;padding:.2rem;display:flex}.flip svg{transform:rotate(180deg)}@keyframes pop-in{0%{opacity:0;transform:translateY(-4px)scale(.98)}to{opacity:1;transform:none}}@keyframes pop-in-up{0%{opacity:0;transform:translateY(4px)scale(.98)}to{opacity:1;transform:none}}.theme-toggle{border:1px solid var(--rule-strong);background:var(--surface-2);border-radius:999px;grid-template-columns:repeat(2,30px);padding:2px;display:inline-grid;position:relative}.theme-toggle .knob{background:var(--surface);width:30px;height:26px;box-shadow:0 1px 2px #00000026, 0 0 0 1px var(--rule);border-radius:999px;transition:transform .2s cubic-bezier(.22,1,.36,1);position:absolute;top:2px;left:2px}.theme-toggle[data-value=dark] .knob{transform:translate(30px)}.theme-toggle button{height:26px;color:var(--muted);cursor:pointer;background:0 0;border:0;border-radius:999px;justify-content:center;align-items:center;padding:0;display:inline-flex;position:relative}.theme-toggle button:hover{color:var(--ink)}.theme-toggle button[aria-checked=true]{color:var(--accent)}.theme-toggle button:focus-visible{outline:2px solid var(--focus);outline-offset:1px}.theme-toggle svg{width:15px;height:15px}@media (prefers-reduced-motion:reduce){.select-panel{animation:none}.select-chevron,.theme-toggle .knob{transition:none}}.input:focus{outline:3px solid var(--focus);outline-offset:0;border-color:var(--focus)}.input[aria-invalid=true]{border-color:var(--bad)}.check{align-items:flex-start;gap:.6rem;display:flex}.check input{width:20px;height:20px;accent-color:var(--accent);flex:none;margin-top:.15rem}.segmented{border:1px solid var(--rule-strong);border-radius:var(--radius);flex-wrap:wrap;display:inline-flex;overflow:hidden}.segmented button{background:var(--surface);min-height:40px;color:var(--ink);font:600 .9rem var(--font-body);cursor:pointer;border:0;padding:.4rem .9rem}.segmented button+button{border-left:1px solid var(--rule-strong)}.segmented button[aria-pressed=true]{background:var(--accent);color:var(--accent-ink)}.table-wrap{-webkit-overflow-scrolling:touch;border:1px solid var(--rule);border-radius:var(--radius-lg);background:var(--surface);overflow-x:auto}table.table{border-collapse:collapse;width:100%;font-size:.92rem}.table th,.table td{text-align:left;border-bottom:1px solid var(--rule);vertical-align:top;padding:.6rem .8rem}.table th{text-transform:uppercase;letter-spacing:.04em;color:var(--muted);background:var(--surface-2);font-size:.78rem;font-weight:600}.table tr:last-child td{border-bottom:0}.table td.r,.table th.r{text-align:right}.spinner{vertical-align:-.15em;border:2px solid;border-right-color:#0000;border-radius:50%;width:1.1em;height:1.1em;animation:.8s linear infinite spin;display:inline-block}@keyframes spin{to{transform:rotate(360deg)}}.kbd{font-family:var(--font-mono);border:1px solid var(--rule-strong);border-bottom-width:2px;border-radius:4px;padding:.05em .35em;font-size:.85em}.divider-label{color:var(--muted);align-items:center;gap:.75rem;margin:1.25rem 0;font-size:.85rem;display:flex}.divider-label:before,.divider-label:after{content:"";border-top:1px solid var(--rule);flex:1}.mark{color:var(--ink);font:700 1.05rem/1 var(--font-display);letter-spacing:-.02em;white-space:nowrap;align-items:center;gap:.5rem;text-decoration:none;display:inline-flex}.mark svg{flex:none;width:28px;height:28px}.mark:hover{color:var(--ink)}html[data-auth=in] .auth-out,html:not([data-auth=in]) .auth-in,html[data-plan=member] .plan-out,html:not([data-plan=member]) .plan-in{display:none!important}@view-transition{navigation:auto}.top{view-transition-name:top}::view-transition-old(root),::view-transition-new(root){animation-duration:.12s}@media (prefers-reduced-motion:reduce){@view-transition{navigation:none}}.top{z-index:40;background:color-mix(in srgb, var(--paper) 88%, transparent);backdrop-filter:saturate(1.4)blur(10px);border-bottom:1px solid var(--rule);position:sticky;top:0}.top-bar{align-items:center;gap:1.25rem;min-height:56px;display:flex}.top-nav{flex:1;align-items:center;gap:.1rem;min-width:0;display:flex}.top-nav a,.top-end a:not(.btn),.top-end button.link{color:var(--ink-2);white-space:nowrap;border-radius:6px;padding:.4rem .65rem;font-size:.92rem;font-weight:550;text-decoration:none}.top-nav a:hover,.top-end a:not(.btn):hover,.top-nav a[aria-current=page],.top-nav a.active{color:var(--ink);background:var(--surface-2)}.top-end{align-items:center;gap:.35rem;margin-left:auto;display:flex}.top-end .btn{min-height:34px;padding:.3rem .8rem;font-size:.88rem}@media (width<=820px){.top{position:static}.top-bar{flex-wrap:wrap;gap:.25rem .75rem;padding-block:.5rem}.top-nav{flex-wrap:wrap;flex-basis:100%;order:3;margin-inline:-.5rem}.top-nav a{padding:.3rem .5rem;font-size:.88rem}}.foot{border-top:1px solid var(--rule);margin-top:3rem}.foot-bar{color:var(--muted);flex-wrap:wrap;align-items:center;gap:.5rem 1.25rem;padding-block:1rem;font-size:.85rem;display:flex}.foot-links{flex-wrap:wrap;flex:1;gap:.25rem 1rem;display:flex}.foot-links a{color:var(--muted);text-decoration:none}.foot-links a:hover{color:var(--ink)}.foot .theme-toggle{margin-left:auto}@media (width<=640px){.foot-links{flex-basis:100%;order:-1}}.head{padding-block:1.75rem 1.25rem}.head.split{flex-wrap:wrap;justify-content:space-between;align-items:flex-end;gap:.75rem 1.5rem;display:flex}.head h1{margin:0}.head h1 .badge{vertical-align:.35em;letter-spacing:0;margin-left:.5rem;font-size:.75rem}.head p{color:var(--muted);max-width:70ch;margin:.35rem 0 0}.head-actions{flex-wrap:wrap;gap:.5rem;display:flex}.crumbs{flex-wrap:wrap;gap:.25rem .5rem;margin-bottom:.4rem;font-size:.85rem;display:flex}.crumbs a{color:var(--muted);text-decoration:none}.crumbs a:hover{color:var(--ink);text-decoration:underline}.crumbs a+a:before{content:"/";color:var(--rule-strong);margin-right:.5rem}[hidden]{display:none!important}.section{padding-block:2.5rem}.prose{max-width:var(--measure)}.wrap.prose{max-width:1200px}.wrap.prose>*{max-width:var(--measure)}.wrap.prose.section{padding-top:0}.prose h2{margin-top:2rem}.prose>h2:first-child{margin-top:0}.prose h3{margin-top:1.5rem}.prose li+li{margin-top:.3rem}.section-head{justify-content:space-between;align-items:baseline;gap:1rem;margin-bottom:.9rem;display:flex}.section-head h2{margin:0}.section-head a{font-size:.92rem;font-weight:600;text-decoration:none}.hero{padding-block:clamp(2rem,5vw,3.5rem) 1rem}.hero-grid{grid-template-columns:minmax(0,1.3fr) minmax(0,.7fr);align-items:center;gap:2.5rem;display:grid}.hero h1{letter-spacing:-.035em;margin-bottom:.75rem;font-size:clamp(2rem,1.4rem + 2.6vw,3.2rem);line-height:1.08}.hero-sub{color:var(--ink-2);margin-bottom:1.25rem;font-size:1.15rem}.sheet-preview{border:1px solid var(--rule-strong);background:#fff;border-radius:6px;width:100%;height:auto;display:block;box-shadow:0 10px 30px #2820141f}.preview-stack{justify-self:center;width:100%;max-width:320px;display:block;position:relative}.preview-stack .sheet-preview:first-child{opacity:.9;position:absolute;inset:0;transform:rotate(-4deg)translate(-14px,10px)}.preview-stack .sheet-preview+.sheet-preview{position:relative;transform:rotate(1.5deg)}@media (width<=820px){.hero-grid{grid-template-columns:1fr}.preview-stack{display:none}}.callout{border:1px solid var(--rule);border-radius:var(--radius-lg);background:var(--surface);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:1rem 2rem;padding:1.25rem 1.5rem;display:flex}.callout h2{margin:0 0 .2rem}.callout p{color:var(--ink-2);margin:0}.link-btn{color:var(--accent);font:600 .92rem var(--font-body);cursor:pointer;background:0 0;border:0;padding:0}.link-btn:hover{text-decoration:underline}.mine-tools{flex-wrap:wrap;align-items:center;gap:.75rem 1rem;margin-bottom:1rem;display:flex}.mine-tools .input{flex:260px;max-width:420px}.chips{flex-wrap:wrap;gap:.35rem;display:flex}.chips button{border:1px solid var(--rule-strong);background:var(--surface);min-height:34px;color:var(--ink);font:550 .92rem var(--font-body);cursor:pointer;border-radius:999px;padding:.25rem .8rem}.chips button:hover{border-color:var(--accent);color:var(--accent)}.chips button[aria-pressed=true]{background:var(--ink);border-color:var(--ink);color:var(--paper)}.mine-pager{justify-content:space-between;align-items:center;gap:1rem;margin-top:1rem;display:flex}.mine-list[hidden]{display:none}.mine-list{margin:0;padding:0;list-style:none;overflow:hidden}.mine-list li{grid-template-columns:minmax(0,1fr) auto auto;align-items:center;gap:.5rem 1.25rem;padding:.55rem 1rem .55rem 1.25rem;display:grid}.mine-list li+li{border-top:1px solid var(--rule)}.mine-title{text-overflow:ellipsis;white-space:nowrap;min-width:0;font-weight:550;overflow:hidden}.mine-date{color:var(--muted);white-space:nowrap;font-size:.85rem}.mine-act{justify-content:flex-end;align-items:center;gap:.35rem;min-width:10.5rem;display:flex}.mine-remove{width:30px;height:30px;color:var(--muted);cursor:pointer;background:0 0;border:0;border-radius:6px;place-items:center;margin-left:.15rem;font-size:1.2rem;line-height:1;display:inline-grid}.mine-remove:hover{background:var(--bad-soft);color:var(--bad)}.mine-remove:disabled{opacity:.4;cursor:default}@media (width<=560px){.mine-list li{grid-template-columns:minmax(0,1fr) auto}.mine-title{white-space:normal}.mine-date{grid-row:2}.mine-act{grid-area:1/2/span 2;min-width:0}}.grade-chips{flex-wrap:wrap;gap:.35rem;margin-top:1rem;display:flex}.grade-chips a{border:1px solid var(--rule-strong);background:var(--surface);min-height:34px;color:var(--ink);border-radius:999px;place-items:center;padding:.25rem .8rem;font-size:.92rem;font-weight:550;text-decoration:none;display:inline-grid}.grade-chips a:hover{border-color:var(--accent);color:var(--accent)}.grade-chips a[aria-current=page]{background:var(--ink);border-color:var(--ink);color:var(--paper)}.grade-chips a.all{border-style:dashed}.hero .grade-chips a{min-height:40px;padding-inline:1rem;font-size:1rem}.band-title{text-transform:uppercase;letter-spacing:.07em;color:var(--muted);margin-bottom:.7rem;font-size:.8rem;font-weight:650}.tiles{grid-template-columns:repeat(auto-fill,minmax(min(100%,260px),1fr));gap:.6rem;margin:0;padding:0;list-style:none;display:grid}.tile{background:var(--surface);border:1px solid var(--rule);border-radius:var(--radius);height:100%;color:var(--ink);align-content:start;gap:.1rem;padding:.75rem 1rem;text-decoration:none;transition:border-color .12s,box-shadow .12s;display:grid}.tile:hover{border-color:var(--accent);color:var(--ink);box-shadow:var(--shadow)}.tile strong{font-weight:600;line-height:1.3}.tile span{color:var(--muted);font-size:.85rem}.unit-cards{grid-template-columns:repeat(auto-fill,minmax(min(100%,520px),1fr));align-items:start;gap:.9rem;display:grid}.unit-card-head{flex-wrap:wrap;justify-content:space-between;align-items:baseline;gap:.25rem 1rem;margin-bottom:.6rem;display:flex}.unit-card h2{margin:0;font-size:1.05rem}.unit-card h2 a{color:var(--ink);text-decoration:none}.unit-card h2 a:hover{color:var(--accent)}.topic-links{columns:2 19rem;column-gap:1.5rem;margin:0;padding-left:1.3rem;font-size:.95rem}.topic-links li{break-inside:avoid;margin-bottom:.2rem}.topic-links a{text-decoration:none}.topic-links a:hover{text-decoration:underline}.split{grid-template-columns:minmax(0,1fr) 360px;align-items:start;gap:2rem;display:grid}.side{gap:1rem;display:grid;position:sticky;top:72px}@media (width<=900px){.split{grid-template-columns:minmax(0,1fr)}.side{position:static}}.unit-topics{counter-reset:t;border:1px solid var(--rule);border-radius:var(--radius-lg);background:var(--surface);margin:0;padding:0;list-style:none;overflow:hidden}.unit-topics li{counter-increment:t}.unit-topics li+li{border-top:1px solid var(--rule)}.unit-topics a{color:var(--ink);grid-template-columns:2rem 1fr;column-gap:.5rem;padding:.7rem 1rem;text-decoration:none;display:grid}.unit-topics a:before{content:counter(t);color:var(--muted);font-variant-numeric:tabular-nums;grid-row:span 2;font-weight:600}.unit-topics a:hover{background:var(--surface-2)}.unit-topics a:hover strong{color:var(--accent)}.unit-topics strong{font-weight:600}.unit-topics span{color:var(--muted);font-size:.88rem}.panel h2{margin:0 0 .3rem;font-size:1rem}.panel>p{color:var(--ink-2);margin:0 0 .85rem;font-size:.92rem}.topic{grid-template-columns:minmax(0,420px) minmax(0,1fr);align-items:start;gap:2.5rem;display:grid}.topic-sheet{position:sticky;top:72px}@media (width<=900px){.topic{grid-template-columns:minmax(0,1fr);gap:1.5rem}.topic-sheet{max-width:300px;margin-inline:auto;position:static}}.topic-main{gap:1.75rem;min-width:0;display:grid}.facts{color:var(--muted);margin:.6rem 0 0;font-size:.85rem}html[data-plan=member] .btn-primary[data-free]{background:var(--surface);border-color:var(--rule-strong);color:var(--ink)}html[data-plan=member] .btn-primary[data-free]:hover{background:var(--surface-2)}.unlimited{border-top:1px solid var(--rule);margin-top:1rem;padding-top:1rem}.panel>p:not(.facts)+.unlimited{border-top:0;margin-top:0;padding-top:0}.unlimited-pitch{color:var(--ink-2);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:.5rem 1rem;font-size:.92rem;display:flex}.unlimited-pitch>span{align-items:center;gap:.6rem;display:inline-flex}.unlimited-pitch a{white-space:nowrap;font-weight:600;text-decoration:none}.unlimited [data-status]:empty{display:none}.unlimited [data-status]{margin:.75rem 0 0}.topic-body{max-width:var(--measure)}.topic-body h2{margin:1.75rem 0 .5rem;font-size:1.1rem}.topic-body h2:first-child{margin-top:0}.worked{background:var(--surface);border:1px solid var(--rule);border-radius:var(--radius-lg);gap:.45rem;padding:.9rem 1.1rem;display:grid;overflow-x:auto}.worked-row{flex-wrap:wrap;align-items:baseline;gap:.25rem 1rem;display:flex}.worked-math{font-size:1.08rem}.worked-note{color:var(--muted);font-size:.9rem}.examples{counter-reset:ex;grid-template-columns:max-content minmax(0,max-content) max-content;justify-content:start;place-items:center start;gap:.5rem 0;margin:0;padding:0;list-style:none;display:grid}.examples li{grid-column:1/-1;grid-template-columns:subgrid;counter-increment:ex;align-items:center;font-size:1.05rem;display:grid}.examples li:before{content:counter(ex) ".";color:var(--muted);padding-right:.6rem;font-size:.95rem}.examples li>span{max-width:100%;padding-block:.2em;overflow:auto hidden}.reveal{vertical-align:middle;border:1px dashed var(--rule-strong);background:var(--surface);min-width:7rem;min-height:2rem;color:var(--ink);font:inherit;cursor:pointer;border-radius:8px;place-items:center;margin-left:.75rem;padding:.2rem .7rem;transition:border-color .25s,background .25s;display:inline-grid;overflow:hidden}.reveal>*{pointer-events:none;grid-area:1/1}.reveal:hover{border-color:var(--accent)}.reveal-a{opacity:0;filter:blur(7px);transition:opacity .35s,filter .35s,transform .4s cubic-bezier(.2,1.3,.4,1);transform:scale(.94)}.reveal-cover{color:var(--accent);font-size:.85rem;font-weight:600;transition:opacity .2s,transform .25s}.reveal[aria-expanded=true]{border-style:solid;border-color:var(--good);background:var(--good-soft)}.reveal[aria-expanded=true] .reveal-a{opacity:1;filter:none;transform:none}.reveal[aria-expanded=true] .reveal-cover{opacity:0;transform:translateY(-6px)}@media (width<=640px){.examples{grid-template-columns:max-content minmax(0,1fr);gap:.9rem 0}.examples li:before{align-self:start;padding-top:.2rem}.examples .reveal{grid-column:2;margin:.35rem 0 0}}@media (prefers-reduced-motion:reduce){.reveal-a,.reveal-cover{filter:none;transition:opacity .15s;transform:none!important}}.topic-list{columns:2 15rem;column-gap:1.5rem;margin:0 0 .75rem;padding-left:1.4rem;font-size:.95rem}.topic-list li{break-inside:avoid;margin:0 0 .2rem}.topic-list a{text-decoration:none}.topic-list a:hover{text-decoration:underline}.pager{border-top:1px solid var(--rule);grid-template-columns:1fr 1fr;gap:1rem;margin-top:2.5rem;padding-top:1rem;display:grid}.pager a{color:var(--ink);gap:.1rem;font-weight:600;text-decoration:none;display:grid}.pager a:hover{color:var(--accent)}.pager a span{color:var(--muted);font-size:.82rem;font-weight:500}.pager a.next{text-align:right}.steps{counter-reset:s;grid-template-columns:repeat(auto-fit,minmax(min(100%,240px),1fr));gap:.6rem;margin:0;padding:0;list-style:none;display:grid}.steps li{counter-increment:s;background:var(--surface);border:1px solid var(--rule);border-radius:var(--radius);grid-template-columns:1.75rem 1fr;column-gap:.65rem;padding:.85rem 1rem;display:grid}.steps li:before{content:counter(s);background:var(--accent);width:1.6rem;height:1.6rem;color:var(--accent-ink);border-radius:50%;grid-row:span 2;place-items:center;font-size:.82rem;font-weight:700;display:grid}.steps span{color:var(--muted);font-size:.9rem}.results{grid-template-columns:repeat(auto-fit,minmax(min(100%,260px),1fr));gap:.5rem;margin:0 0 .6rem;padding:0;list-style:none;display:grid}.results li{background:var(--surface);border:1px solid var(--rule);border-radius:var(--radius);align-content:start;justify-items:start;gap:.4rem;padding:.8rem 1rem;font-size:.92rem;display:grid}.price-grid{grid-template-columns:repeat(auto-fit,minmax(min(100%,280px),1fr));align-items:stretch;gap:1rem;display:grid}.price-card{flex-direction:column;gap:.75rem;padding:1.4rem;display:flex}.price-card h2{color:var(--ink-2);margin:0;font-size:1rem}.price-card.featured{border-color:var(--accent);box-shadow:inset 0 0 0 1px var(--accent), var(--shadow)}.price-card .amount{letter-spacing:-.03em;font-size:2.2rem;font-weight:700;line-height:1}.price-card .per{letter-spacing:0;color:var(--muted);font-size:.9rem;font-weight:500}.price-card .checks{margin:0 0 .5rem}.price-card .btn{margin-top:auto}.trust{flex-wrap:wrap;gap:.5rem 1.5rem;margin:1.25rem 0 .75rem;padding:0;list-style:none;display:flex}.trust li{color:var(--ink-2);align-items:center;gap:.45rem;font-size:.92rem;font-weight:550;display:inline-flex}.trust li:before{content:"✓";color:var(--good);font-weight:700}.checks{color:var(--ink-2);gap:.35rem;margin-inline:0;padding:0;font-size:.95rem;list-style:none;display:grid}.checks li{grid-template-columns:1.1rem 1fr;gap:.45rem;display:grid}.checks li:before{content:"✓";color:var(--good);font-weight:700}.faq h2{margin:2rem 0 .25rem;font-size:1.05rem}.faq h2:first-child{margin-top:0}.faq details{border-bottom:1px solid var(--rule);padding:.75rem 0}.faq summary{cursor:pointer;font-weight:600}.faq details>div{color:var(--ink-2);margin-top:.5rem}.faq details>div p:last-child{margin-bottom:0}@media (width<=560px){.tiles{grid-template-columns:1fr 1fr}.tile{padding:.65rem .8rem}}