:root{color-scheme:light;--bg:#fff;--text:#111;--muted:#626168;--line:#dedde0;--accent:#d94c16;--peach:#f2e8dc;--lavender:#eeedf2;--sage:#e8eee5;--surface:#f7f7f6;--paper:#fff}
:root[data-theme=dark]{color-scheme:dark;--bg:#161615;--text:#f2f0eb;--muted:#aaa8a2;--line:#373735;--surface:#21211f;--paper:#292925;--peach:#34291f;--lavender:#2b2835;--sage:#263027;--accent:#f0804e}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:Georgia,'Times New Roman',serif;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}button,input,select,textarea{font:inherit}button,a,input,textarea,select{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:default}a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{outline:2px solid var(--accent);outline-offset:5px}.wrap{width:calc(100% - 80px);max-width:1240px;margin-inline:auto}.skip{position:absolute;left:20px;top:-80px;padding:12px;background:var(--bg);z-index:10}.skip:focus{top:10px}.header{height:69px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:12px;font-family:system-ui,sans-serif;font-size:30px;font-weight:750;letter-spacing:-1px}.brand-dot{display:inline-block;width:22px;height:22px;border-radius:50%;background:var(--accent)}nav{display:flex;align-items:center;gap:48px;font-size:20px}nav>a{padding-block:10px;border-bottom:1px solid transparent}nav>a[aria-current=page]{border-color:var(--muted)}.theme-toggle{width:40px;height:40px;padding:7px;border:0;background:none;color:var(--text);margin-left:12px}.theme-toggle svg{width:25px;height:25px;fill:none;stroke:currentColor;stroke-width:1.5;stroke-linecap:round}.intro{padding:76px 0 67px;margin-left:22%}h1,h2,h3,p{margin:0}h1{font-size:96px;line-height:1.12;font-weight:600;letter-spacing:-4px}.intro p{margin-top:22px;font-size:30px;line-height:1.35;color:var(--muted)}.text-link{display:inline-block;font-size:27px;border-bottom:1px solid currentColor;margin-top:34px;line-height:1.2}.text-link:hover{color:var(--accent)}.section-head{display:flex;justify-content:space-between;align-items:center;gap:20px;margin-bottom:24px}.section-head h2{font-size:44px;line-height:1.2;font-weight:400;letter-spacing:-1.1px}.section-head>a{font-size:19px;color:var(--muted)}.section-head>a:hover{color:var(--accent)}.section-head>a span{margin-left:8px}.tool-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}.preview{aspect-ratio:1.55;border-radius:8px;overflow:hidden;display:flex;align-items:center;justify-content:center;transition:transform .25s ease}.peach{background:var(--peach)}.lavender{background:var(--lavender)}.sage{background:var(--sage)}.tool-card:hover .preview{transform:translateY(-4px)}.tool-card h3{display:flex;justify-content:space-between;align-items:baseline;gap:8px;font-size:32px;font-weight:400;letter-spacing:-.5px;line-height:1.2;margin-top:20px}.tool-card h3 span{font-family:system-ui,sans-serif;font-size:26px;transition:transform .2s}.tool-card:hover h3 span{transform:translate(2px,-2px);color:var(--accent)}.tool-card p{font-size:21px;line-height:1.4;color:var(--muted);margin-top:8px}.mini-timer{width:53%;aspect-ratio:1;position:relative;display:grid;place-items:center;font:32px system-ui,sans-serif;font-variant-numeric:tabular-nums}.mini-timer svg{position:absolute;width:100%;height:100%;inset:0;overflow:visible}.mini-timer circle{fill:none;stroke-width:2}.mini-timer .track{stroke:var(--text);opacity:.13}.mini-timer .arc{stroke:var(--accent);stroke-dasharray:165 553;transform:rotate(-90deg);transform-origin:center}.mini-timer .dot{fill:var(--accent);stroke:none}.mini-note{background:var(--paper);border:1px solid var(--line);border-radius:10px;width:51%;height:79%;padding:24px 23px;font-size:20px;line-height:1.3;box-shadow:0 2px 4px #00000003}.mini-note span{display:block;margin-bottom:16px}.mini-note i{display:block;width:100%;height:1px;background:var(--line);margin:18px 0}.mini-bars{display:flex;align-items:flex-end;gap:10px;width:83%;height:57%;border-bottom:1px solid #11111110}.mini-bars i{flex:1;background:var(--text);height:var(--h);min-height:1px}.mini-bars .orange{background:var(--accent)}.footer{display:flex;justify-content:space-between;gap:20px;margin-top:60px;padding:24px 0 30px;border-top:1px solid var(--line);font-size:16px;line-height:1.4;color:var(--muted)}
.page{max-width:1000px;min-height:65vh;padding-top:68px}.page h1{font-size:64px;letter-spacing:-2px}.page .lede{margin-top:18px;font-size:24px;line-height:1.5;color:var(--muted);max-width:740px}.back-link{display:inline-block;font-size:17px;color:var(--muted);margin-bottom:30px}.back-link:hover{color:var(--accent)}.page-head{margin-bottom:42px}.utility-panel{border:1px solid var(--line);border-radius:12px;padding:32px;background:var(--surface)}.button{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid var(--line);border-radius:6px;min-height:44px;padding:10px 22px;font-family:system-ui,sans-serif;font-size:15px;background:var(--bg);color:var(--text)}.button:hover{border-color:var(--accent)}.button.primary{background:var(--text);color:var(--bg);border-color:var(--text)}.button.primary:hover{background:var(--accent);border-color:var(--accent);color:#fff}.button-row{display:flex;gap:12px;align-items:center;flex-wrap:wrap}.help{font-family:system-ui,sans-serif;font-size:14px;color:var(--muted);line-height:1.6}.tool-list{border-top:1px solid var(--line)}.tool-row{display:grid;grid-template-columns:48px 1fr auto;gap:22px;align-items:center;padding:28px 0;border-bottom:1px solid var(--line)}.tool-row .number{font:13px ui-monospace,monospace;color:var(--muted)}.tool-row h2{font-size:30px;font-weight:400}.tool-row p{font-size:18px;line-height:1.5;color:var(--muted);margin-top:6px}.tool-row .arrow{font-size:28px}.tool-row:hover h2,.tool-row:hover .arrow{color:var(--accent)}.lab-note{margin-top:32px;max-width:640px}.timer-panel{display:grid;place-items:center;gap:28px;background:var(--peach);padding-block:44px}.timer-display{width:min(100%,330px);aspect-ratio:1;border-radius:50%;border:1px solid var(--line);display:grid;place-items:center;position:relative}.timer-display svg{position:absolute;width:100%;height:100%;inset:0;transform:rotate(-90deg)}.timer-display circle{fill:none;stroke:var(--accent);stroke-width:1.8;stroke-dasharray:565.487;stroke-dashoffset:0;transition:stroke-dashoffset .3s linear}.timer-time{font:64px system-ui,sans-serif;letter-spacing:-3px;font-variant-numeric:tabular-nums}.timer-status{font:14px system-ui,sans-serif;letter-spacing:.03em;color:var(--muted);margin-top:-70px}.segmented{display:flex;gap:6px;flex-wrap:wrap;justify-content:center}.segmented button{background:transparent;color:var(--muted);border:1px solid transparent;border-radius:6px;padding:9px 14px;font:14px system-ui,sans-serif}.segmented button[aria-pressed=true]{border-color:var(--text);color:var(--text)}.timer-task{width:min(100%,440px);background:transparent;border:0;border-bottom:1px solid var(--line);padding:12px 4px;text-align:center;color:var(--text);font-size:22px}.timer-task::placeholder{color:var(--muted)}.tool-foot{margin-top:22px}.note-toolbar{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:16px;flex-wrap:wrap}.note-title{width:100%;border:0;border-bottom:1px solid var(--line);background:var(--bg);padding:16px 0;font-size:28px;color:var(--text);border-radius:0}.note-body{display:block;resize:vertical;min-height:360px;width:100%;padding:24px 0;border:0;background:var(--bg);color:var(--text);font-size:21px;line-height:1.7}.note-title:focus,.note-body:focus{outline-offset:8px}.note-footer{display:flex;justify-content:space-between;padding-top:18px;border-top:1px solid var(--line);gap:16px}.prob-layout{display:grid;grid-template-columns:250px 1fr;gap:34px}.field{display:block;margin-bottom:26px;font-family:system-ui,sans-serif;font-size:14px}.field>span{display:block;margin-bottom:10px}.field input[type=number],.field select{width:100%;padding:11px 12px;border:1px solid var(--line);border-radius:5px;background:var(--bg);color:var(--text);font-size:16px}.field input[type=range]{width:100%;accent-color:var(--accent)}.field output{float:right;color:var(--accent)}.plot{min-width:0}.plot svg{width:100%;height:auto;display:block;overflow:visible;color:var(--text)}.prob-result{font-size:45px;line-height:1.1;letter-spacing:-1px;margin-top:14px}.prob-result small{display:block;font:14px system-ui,sans-serif;color:var(--muted);margin-bottom:14px;letter-spacing:0}.stats{display:flex;gap:28px;border-top:1px solid var(--line);padding-top:18px;margin-top:22px;font-family:system-ui,sans-serif;font-size:14px;color:var(--muted)}.stats strong{display:block;color:var(--text);font-size:19px;font-weight:500;margin-top:5px}.error{color:#b43816;font-family:system-ui,sans-serif;font-size:14px;min-height:24px}.not-found{padding:100px 0;max-width:740px}.not-found p{font-size:24px;line-height:1.5;margin-top:20px;color:var(--muted)}
.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}
@media(min-width:1600px){.intro{padding-top:100px;padding-bottom:100px}}
@media(max-width:1100px){h1{font-size:80px}.intro{margin-left:15%;padding-block:66px}.intro p{font-size:25px}.section-head h2{font-size:36px}.tool-card h3{font-size:27px}.tool-card p{font-size:18px}.mini-note{font-size:16px;padding:18px}.mini-note i{margin:13px 0}.mini-bars{gap:7px}}
@media(max-width:760px){.wrap{width:calc(100% - 40px)}.header{height:67px}.brand{font-size:25px;gap:9px}.brand-dot{width:18px;height:18px}nav{gap:22px;font-size:17px}.theme-toggle{margin-left:0;width:30px;padding:3px}.intro{margin-left:0;padding:64px 0}h1{font-size:62px;letter-spacing:-2.5px}.intro p{font-size:23px;margin-top:20px}.text-link{font-size:22px;margin-top:26px}.section-head{align-items:baseline;margin-bottom:22px}.section-head h2{font-size:31px;letter-spacing:-.7px}.section-head>a{font-size:16px;white-space:nowrap}.tool-grid{grid-template-columns:1fr;gap:34px}.preview{aspect-ratio:1.6}.tool-card h3{font-size:29px;margin-top:16px}.tool-card p{font-size:19px;margin-top:6px}.mini-timer{max-width:220px;font-size:34px}.mini-note{max-width:220px;width:55%;font-size:20px;padding:20px;height:80%}.mini-note i{margin:10px 0}.mini-bars{gap:12px}.footer{font-size:14px;margin-top:48px;padding-bottom:24px}.page{padding-top:36px}.page h1{font-size:46px;letter-spacing:-1.5px}.page .lede{font-size:21px}.page-head{margin-bottom:30px}.utility-panel{padding:22px}.timer-panel{padding-block:30px}.timer-display{width:min(100%,280px)}.timer-time{font-size:56px}.timer-status{margin-top:-55px}.prob-layout{grid-template-columns:1fr;gap:20px}.prob-fields{display:grid;grid-template-columns:1fr;gap:0 18px}.prob-fields .wide{grid-column:1/-1}.tool-row{grid-template-columns:28px 1fr auto;gap:12px;padding:24px 0}.tool-row h2{font-size:27px}.tool-row p{font-size:17px}.note-body{font-size:20px}.note-footer{flex-direction:column;gap:7px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}