@font-face{font-family:Plus Jakarta Sans;font-style:normal;font-weight:200 800;font-display:swap;src:url(../media/0b1dc8ddaa74ba49-s.1w1m1wqmjasxa.woff2)format("woff2");unicode-range:U+460-52F,U+1C80-1C8A,U+20B4,U+2DE0-2DFF,U+A640-A69F,U+FE2E-FE2F}@font-face{font-family:Plus Jakarta Sans;font-style:normal;font-weight:200 800;font-display:swap;src:url(../media/e629b5bc06499d58-s.1y3v-klcv8xov.woff2)format("woff2");unicode-range:U+102-103,U+110-111,U+128-129,U+168-169,U+1A0-1A1,U+1AF-1B0,U+300-301,U+303-304,U+308-309,U+323,U+329,U+1EA0-1EF9,U+20AB}@font-face{font-family:Plus Jakarta Sans;font-style:normal;font-weight:200 800;font-display:swap;src:url(../media/1a099d89ee94ee96-s.15dvesjzf7814.woff2)format("woff2");unicode-range:U+100-2BA,U+2BD-2C5,U+2C7-2CC,U+2CE-2D7,U+2DD-2FF,U+304,U+308,U+329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}@font-face{font-family:Plus Jakarta Sans;font-style:normal;font-weight:200 800;font-display:swap;src:url(../media/fba5a26ea33df6a3-s.p.08ssgmy_tb90r.woff2)format("woff2");unicode-range:U+??,U+131,U+152-153,U+2BB-2BC,U+2C6,U+2DA,U+2DC,U+304,U+308,U+329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}@font-face{font-family:Plus Jakarta Sans Fallback;src:local(Arial);ascent-override:98.88%;descent-override:21.15%;line-gap-override:0.0%;size-adjust:104.98%}.plus_jakarta_sans_6cbc0d5f-module__dx4leq__className{font-family:Plus Jakarta Sans,Plus Jakarta Sans Fallback;font-style:normal}.plus_jakarta_sans_6cbc0d5f-module__dx4leq__variable{--font-jakarta:"Plus Jakarta Sans", "Plus Jakarta Sans Fallback"}
@font-face{font-family:STIX Two Text;font-style:italic;font-weight:400 700;font-display:swap;src:url(../media/169964a708a16db9-s.0n3rc8lf61k6o.woff2)format("woff2");unicode-range:U+460-52F,U+1C80-1C8A,U+20B4,U+2DE0-2DFF,U+A640-A69F,U+FE2E-FE2F}@font-face{font-family:STIX Two Text;font-style:italic;font-weight:400 700;font-display:swap;src:url(../media/f73554b76b3968b4-s.1szap0sm0xuhn.woff2)format("woff2");unicode-range:U+301,U+400-45F,U+490-491,U+4B0-4B1,U+2116}@font-face{font-family:STIX Two Text;font-style:italic;font-weight:400 700;font-display:swap;src:url(../media/6a5ee69d6a4389bc-s.0eoora2vj-zmt.woff2)format("woff2");unicode-range:U+370-377,U+37A-37F,U+384-38A,U+38C,U+38E-3A1,U+3A3-3FF}@font-face{font-family:STIX Two Text;font-style:italic;font-weight:400 700;font-display:swap;src:url(../media/844757ee197428ee-s.2kljua520w9vz.woff2)format("woff2");unicode-range:U+102-103,U+110-111,U+128-129,U+168-169,U+1A0-1A1,U+1AF-1B0,U+300-301,U+303-304,U+308-309,U+323,U+329,U+1EA0-1EF9,U+20AB}@font-face{font-family:STIX Two Text;font-style:italic;font-weight:400 700;font-display:swap;src:url(../media/5e56e1bd35970baf-s.41l_2w43chchu.woff2)format("woff2");unicode-range:U+100-2BA,U+2BD-2C5,U+2C7-2CC,U+2CE-2D7,U+2DD-2FF,U+304,U+308,U+329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}@font-face{font-family:STIX Two Text;font-style:italic;font-weight:400 700;font-display:swap;src:url(../media/a1c7a484c510d19c-s.p.0wluu3xg-hx03.woff2)format("woff2");unicode-range:U+??,U+131,U+152-153,U+2BB-2BC,U+2C6,U+2DA,U+2DC,U+304,U+308,U+329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}@font-face{font-family:STIX Two Text;font-style:normal;font-weight:400 700;font-display:swap;src:url(../media/b1d5dad78a0d12b5-s.1xtj9yne7zfhx.woff2)format("woff2");unicode-range:U+460-52F,U+1C80-1C8A,U+20B4,U+2DE0-2DFF,U+A640-A69F,U+FE2E-FE2F}@font-face{font-family:STIX Two Text;font-style:normal;font-weight:400 700;font-display:swap;src:url(../media/17381594d15ffe51-s.0x6g2-e0030vd.woff2)format("woff2");unicode-range:U+301,U+400-45F,U+490-491,U+4B0-4B1,U+2116}@font-face{font-family:STIX Two Text;font-style:normal;font-weight:400 700;font-display:swap;src:url(../media/f8ed89659f8cd9f4-s.3813ocq4ejija.woff2)format("woff2");unicode-range:U+370-377,U+37A-37F,U+384-38A,U+38C,U+38E-3A1,U+3A3-3FF}@font-face{font-family:STIX Two Text;font-style:normal;font-weight:400 700;font-display:swap;src:url(../media/ea20f3f596d3a0b3-s.322bd5_47qnof.woff2)format("woff2");unicode-range:U+102-103,U+110-111,U+128-129,U+168-169,U+1A0-1A1,U+1AF-1B0,U+300-301,U+303-304,U+308-309,U+323,U+329,U+1EA0-1EF9,U+20AB}@font-face{font-family:STIX Two Text;font-style:normal;font-weight:400 700;font-display:swap;src:url(../media/1995f8c0ebebeccd-s.3_ul9q3tcrf5j.woff2)format("woff2");unicode-range:U+100-2BA,U+2BD-2C5,U+2C7-2CC,U+2CE-2D7,U+2DD-2FF,U+304,U+308,U+329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}@font-face{font-family:STIX Two Text;font-style:normal;font-weight:400 700;font-display:swap;src:url(../media/62c2ceb5e93c1826-s.p.03874znv80-ea.woff2)format("woff2");unicode-range:U+??,U+131,U+152-153,U+2BB-2BC,U+2C6,U+2DA,U+2DC,U+304,U+308,U+329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}@font-face{font-family:STIX Two Text Fallback;src:local(Times New Roman);ascent-override:72.67%;descent-override:22.7%;line-gap-override:23.84%;size-adjust:104.86%}.stix_two_text_9a3cd182-module__2L8r-G__className{font-family:STIX Two Text,STIX Two Text Fallback}.stix_two_text_9a3cd182-module__2L8r-G__variable{--font-stix:"STIX Two Text", "STIX Two Text Fallback"}
:root{--color-ink:#0e1511;--color-paper:#faf9f4;--color-card:#fff;--color-cream:#f5f2e6;--color-primary:#1d6517;--color-primary-deep:#135029;--color-primary-text:#1d6517;--color-primary-wash:#13502914;--color-accent:#ff7a00;--color-accent-soft:#ffab5c;--color-accent-text:#b45309;--color-accent-wash:#ff7a0029;--color-highlight:#fde047;--color-muted:#54655b;--color-rule:#e5e1d4;--color-rule-soft:#efebdf;--color-grid:#1350290e;--color-danger:#b91c1c;--color-success:#15803d;--color-ink-wash:#0e15110a;--font-display:var(--font-jakarta), "Plus Jakarta Sans", system-ui, -apple-system, "Segoe UI", sans-serif;--font-ui:var(--font-jakarta), "Plus Jakarta Sans", system-ui, -apple-system, "Segoe UI", sans-serif;--font-serif:var(--font-stix), "STIX Two Text", Georgia, "Times New Roman", serif;--font-mono:ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;--radius-btn:12px;--radius-sm:8px;--radius-md:12px;--radius-lg:16px;--shadow-soft:0 1px 2px #0e15110a;--shadow-lift:0 12px 28px -14px #0e151138;--shadow-brand:0 14px 32px -14px #13502966}*,:before,:after{box-sizing:border-box}html{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;scroll-behavior:smooth;background:var(--color-paper)}body{background:var(--color-paper);color:var(--color-ink);font-family:var(--font-ui);-webkit-font-smoothing:antialiased;max-width:100%;margin:0;font-size:16px;line-height:1.5;overflow-x:hidden}body:before{content:"";z-index:-1;pointer-events:none;background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='140' height='140'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2'/><feColorMatrix type='saturate' values='0'/><feComponentTransfer><feFuncA type='linear' slope='0.05'/></feComponentTransfer></filter><rect width='140' height='140' filter='url(%23n)'/></svg>");position:fixed;inset:0}h1,h2,h3,h4,h5,h6{font-family:var(--font-display);letter-spacing:-.02em}h1,h2{text-wrap:balance}p,li,figcaption,.subtitle{font-family:var(--font-serif)}p{text-wrap:pretty}a{color:inherit;text-underline-offset:2px;text-decoration:underline;transition:color .15s}a:hover{color:var(--color-accent-text)}button,input,select,textarea{font:inherit;color:inherit}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.55}:focus-visible{outline:2px solid var(--color-primary);outline-offset:2px}summary{cursor:pointer}details>summary::-webkit-details-marker{display:none}::selection{background:var(--color-highlight);color:var(--color-ink)}section[id]{scroll-margin-top:76px}.container{width:100%;max-width:1024px;margin:0 auto;padding:0 16px}.container-narrow{width:100%;max-width:720px;margin:0 auto;padding:0 16px}.stack{gap:16px;display:grid}.stack-sm{gap:8px;display:grid}.actions{flex-wrap:wrap;align-items:center;gap:8px;display:flex}.flex-between{justify-content:space-between;align-items:center;gap:12px;display:flex}.flex-gap{flex-wrap:wrap;align-items:center;gap:12px;display:flex}.grid-2{grid-template-columns:1fr 1fr;gap:24px;display:grid}.grid-3{grid-template-columns:repeat(3,1fr);gap:24px;display:grid}.text-center{text-align:center}.w-full{width:100%}.surface{background:var(--color-card);border-block:1px solid var(--color-rule)}.muted{color:var(--color-muted)}.danger{color:var(--color-danger)}.success{color:var(--color-success)}.small{font-size:.875rem}.tiny{font-size:.75rem}.yx-label{font-family:var(--font-mono);text-transform:uppercase;letter-spacing:.14em;color:var(--color-muted);margin-bottom:4px;font-size:.6875rem;display:block}.field{gap:4px;margin-bottom:12px;display:grid}.field label{color:var(--color-muted);font-size:.875rem}input[type=text],input[type=email],input[type=password],input[type=number],input[type=search],input[type=url],select,textarea{border:1px solid var(--color-rule);background:var(--color-card);border-radius:10px;width:100%;max-width:100%;padding:8px 10px;font-size:16px;transition:border-color .16s,box-shadow .16s}input:focus-visible,textarea:focus-visible,select:focus-visible{border-color:var(--color-primary);box-shadow:0 0 0 3px var(--color-primary-wash);outline:none}input[type=checkbox],input[type=radio]{accent-color:var(--color-primary)}textarea{resize:vertical;min-height:96px}.checkbox-row{align-items:flex-start;gap:8px;display:flex}.checkbox-row input{width:auto;margin-top:3px}progress{appearance:none;background:var(--color-ink-wash);border:none;border-radius:99px;width:100%;height:8px;overflow:hidden}progress::-webkit-progress-bar{background:0 0}progress::-webkit-progress-value{background:var(--color-primary);border-radius:99px;transition:width .3s}progress::-moz-progress-bar{background:var(--color-primary);border-radius:99px}.yx-btn{border:1.5px solid var(--color-ink);border-radius:var(--radius-btn);color:var(--color-ink);letter-spacing:-.01em;background:0 0;justify-content:center;align-items:center;gap:7px;max-width:100%;padding:10px 18px;font-size:.9rem;font-weight:700;text-decoration:none;transition:background-color .16s,border-color .16s,color .16s,transform .16s,box-shadow .16s;display:inline-flex}@supports (corner-shape:squircle){.yx-btn,.nav-cta{corner-shape:squircle;border-radius:14px}}.yx-btn svg{transition:transform .16s}.yx-btn:hover{border-color:var(--color-primary);color:var(--color-primary-text);background:var(--color-primary-wash)}.yx-btn:hover svg{transform:translate(3px)}.yx-btn-primary{background:var(--color-primary);border-color:var(--color-primary);color:#fff;box-shadow:var(--shadow-soft)}.yx-btn-primary:hover{background:var(--color-primary-deep);border-color:var(--color-primary-deep);color:#fff;box-shadow:var(--shadow-brand);transform:translateY(-1px)}.yx-btn-paper{background:var(--color-cream);border-color:var(--color-cream);color:var(--color-primary)}.yx-btn-paper:hover{background:var(--color-accent);border-color:var(--color-accent);color:var(--color-ink);transform:translateY(-1px);box-shadow:0 14px 30px -12px #00000080}.yx-btn-ghost{color:var(--color-muted);background:0 0;border-color:#0000;padding:4px}.yx-btn-ghost:hover{color:var(--color-ink);background:0 0;border-color:#0000}.yx-btn:active{transform:translateY(1px)}.wordmark{letter-spacing:-.035em;color:var(--color-accent);font-size:1.3rem;font-weight:200;font-family:var(--font-display);align-items:center;text-decoration:none;display:inline-flex}.wordmark-logo{object-fit:contain;flex-shrink:0;width:34px;height:34px;margin-right:6px}.wordmark:hover{color:var(--color-accent-text)}.wordmark span{color:inherit}.nav{z-index:50;border-bottom:1px solid var(--color-rule);background:var(--color-paper);background:color-mix(in srgb, var(--color-paper) 84%, transparent);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);position:sticky;top:0}.nav-inner{justify-content:space-between;align-items:center;gap:16px;max-width:1024px;margin:0 auto;padding:12px 16px;display:flex}.nav-inner-constrained{max-width:1024px}.nav-desktop{align-items:center;gap:16px;display:none}.nav-desktop a{color:var(--color-ink);font-size:.92rem;font-weight:600;text-decoration:none;position:relative}.nav-desktop a:after{content:"";background:var(--color-accent);transform-origin:0;border-radius:2px;height:2px;transition:transform .18s;position:absolute;bottom:-4px;left:0;right:0;transform:scaleX(0)}.nav-desktop a:hover{color:var(--color-primary-text)}.nav-desktop a:hover:after{transform:scaleX(1)}.nav-cta{border:1.5px solid var(--color-primary);color:var(--color-primary-text);border-radius:var(--radius-btn);background:0 0;padding:7px 14px;font-size:.875rem;font-weight:700;text-decoration:none;transition:background-color .16s,color .16s,transform .16s,box-shadow .16s,border-color .16s}.nav-cta:hover{background:var(--color-primary-wash);color:var(--color-primary-text);border-color:var(--color-primary);box-shadow:var(--shadow-brand);transform:translateY(-1px)}.nav-toggle{border:1px solid var(--color-rule);background:var(--color-card);border-radius:10px;padding:6px 10px;transition:border-color .16s}.nav-toggle:hover{border-color:var(--color-primary)}.nav-mobile{border-top:1px solid var(--color-rule);background:var(--color-paper);gap:8px;padding:12px 16px;display:grid}.nav-mobile a{color:var(--color-ink);padding:8px 0;font-weight:600;text-decoration:none}.nav-mobile a:hover{color:var(--color-primary-text)}.nav-mobile[hidden]{display:none}.panel{border:1px solid var(--color-rule);border-radius:var(--radius-lg);background:var(--color-card);max-width:100%;box-shadow:var(--shadow-soft);padding:20px}.panel-flat{border:1px solid var(--color-rule);border-radius:var(--radius-lg);background:var(--color-card)}.panel-flat:hover{border-color:var(--color-primary)}.table-wrap{-webkit-overflow-scrolling:touch;overflow-x:auto}table{border-collapse:collapse;width:100%;max-width:100%}th,td{border-bottom:1px solid var(--color-rule);text-align:left;vertical-align:top;padding:8px}th{font-family:var(--font-ui);text-transform:uppercase;letter-spacing:.08em;color:var(--color-muted);font-size:.72rem}.markdown{overflow-wrap:anywhere;font-size:1rem;line-height:1.7}.markdown>:first-child{margin-top:0}.markdown>:last-child{margin-bottom:0}.markdown h1,.markdown h2,.markdown h3,.markdown h4{margin-top:1.5em;margin-bottom:.5em;font-weight:700;line-height:1.3}.markdown h1{font-size:1.5em}.markdown h2{font-size:1.3em}.markdown h3{font-size:1.15em}.markdown p,.markdown ul,.markdown ol{margin-top:.75em;margin-bottom:.75em}.markdown ul,.markdown ol{padding-left:1.5em}.markdown pre{border:1px solid var(--color-rule);background:var(--color-ink-wash);white-space:pre-wrap;word-break:break-word;border-radius:10px;padding:12px;overflow-x:auto}.markdown code{font-family:var(--font-mono);border:1px solid var(--color-rule);border-radius:4px;padding:0 4px;font-size:.9em}.markdown pre code{border:none;padding:0}.markdown blockquote{border-left:3px solid var(--color-accent);color:var(--color-muted);margin:.75em 0;padding-left:12px}.markdown a{color:var(--color-primary-text);word-break:break-all}.markdown a:hover{color:var(--color-accent-text)}.problem-card{gap:16px;display:grid}.problem-meta{font-family:var(--font-mono);text-transform:uppercase;letter-spacing:.08em;color:var(--color-muted);font-size:.75rem}.problem-input-wrap{border:1px solid var(--color-rule);background:var(--color-card);border-radius:12px;overflow:hidden}.problem-answer-row{align-items:stretch;display:flex}.problem-answer-row input{min-width:0;font-family:var(--font-mono);border:none;border-radius:0;flex:1;padding:10px}.problem-answer-row input:focus-visible{box-shadow:none;outline:none}.problem-answer-row button{border:none;border-left:1px solid var(--color-rule);background:var(--color-card);padding:10px 16px;font-weight:700}.problem-answer-row button:hover{background:var(--color-primary-wash);color:var(--color-primary-text)}.math-preview{border-top:1px solid var(--color-rule);min-height:2.75rem;padding:8px 10px;overflow-x:auto}.math-output{min-height:1.5em}.math-keyboard{border-bottom:1px solid var(--color-rule);background:var(--color-ink-wash);flex-wrap:wrap;gap:4px;padding:8px;display:flex;overflow-x:auto}.math-keyboard-group{flex-wrap:nowrap;flex-shrink:0;align-items:center;gap:4px;display:flex}.math-keyboard-separator{background:var(--color-rule);flex-shrink:0;width:1px;height:24px;margin:0 4px}.math-keyboard button{border:1px solid var(--color-rule);background:var(--color-card);min-width:36px;min-height:36px;color:var(--color-ink);border-radius:8px;padding:4px 8px;transition:border-color .16s,color .16s}.math-keyboard button:hover{border-color:var(--color-primary);color:var(--color-primary-text)}.answer-comparison{border:1px solid var(--color-rule);background:var(--color-card);border-radius:12px;overflow:hidden}.answer-comparison-header{border-bottom:1px solid var(--color-rule);justify-content:space-between;align-items:center;gap:8px;padding:8px 12px;display:flex}.answer-comparison.correct .answer-comparison-header{background:#15803d14}.answer-comparison.incorrect .answer-comparison-header{background:#b91c1c14}.answer-comparison-grid{background:var(--color-rule);gap:1px;display:grid}.answer-comparison-item{background:var(--color-card);padding:12px}.radar-wrap{width:100%;max-width:340px;margin:0 auto}.radar-chart{max-width:100%;height:auto;overflow:visible}.radar-chart text{font-family:var(--font-mono);fill:var(--color-muted)}.radar-empty,.radar-fallback{border:1px solid var(--color-rule);color:var(--color-muted);border-radius:12px;padding:16px}.radar-legend{grid-template-columns:1fr;gap:8px;margin:16px 0 0;padding:0;font-size:.875rem;list-style:none;display:grid}.solution-panel{border-left:3px solid var(--color-primary);background:var(--color-primary-wash);border-radius:0 12px 12px 0;margin-top:4px;padding:12px 16px}.solution-panel .yx-label{color:var(--color-primary-text)}.forum-shell{flex-direction:column;height:100vh;display:flex;overflow:hidden}.forum-body{flex:1;min-height:0;display:flex;overflow:hidden;flex-wrap:nowrap!important}.forum-main{flex-direction:column;flex:1;min-width:0;min-height:0;display:flex;flex-wrap:nowrap!important}.forum-scroll{-webkit-overflow-scrolling:touch;overscroll-behavior:contain;flex:1;min-height:0;overflow-y:auto}.chat-item .chat-dots{opacity:0}.chat-item:hover .chat-dots{opacity:1}.status-badge{font-family:var(--font-mono);text-transform:uppercase;letter-spacing:.08em;border-radius:6px;align-items:center;padding:2px 8px;font-size:.65rem;display:inline-flex}.status-preview{background:var(--color-accent-wash);color:var(--color-accent-text)}.status-coming-soon{background:var(--color-ink-wash);color:var(--color-muted)}.auth-timeout{z-index:1000;border:1px solid var(--color-danger);background:var(--color-card);max-width:320px;box-shadow:var(--shadow-lift);border-radius:12px;padding:12px;position:fixed;bottom:16px;right:16px}.hero{padding:56px 0 64px;position:relative;overflow:hidden}.hero:before{content:"";pointer-events:none;background-image:linear-gradient(var(--color-grid) 1px, transparent 1px), linear-gradient(90deg, var(--color-grid) 1px, transparent 1px);background-size:28px 28px;position:absolute;inset:0;-webkit-mask-image:linear-gradient(#000 55%,#0000);mask-image:linear-gradient(#000 55%,#0000)}.hero-grid{align-items:center;gap:48px;display:grid;position:relative}.hero-title{letter-spacing:-.035em;margin:10px 0 0;font-size:clamp(2.9rem,7.5vw,4.8rem);font-weight:800;line-height:.98}.hero-title>span{width:fit-content;display:block;position:relative}.hero .subtitle{max-width:34rem;margin:20px 0 0}.hero .actions{margin-top:26px}.hero-note{margin-top:14px}.circled{display:inline-block;position:relative}.circled svg{pointer-events:none;position:absolute;inset:-8% -5%;overflow:visible}.circled-path{fill:none;stroke:var(--color-accent);stroke-width:4px;stroke-linecap:round;stroke-dasharray:1;stroke-dashoffset:1px;animation:.8s cubic-bezier(.45,0,.2,1) 1.1s forwards draw}.anno{white-space:nowrap;font-family:var(--font-serif);color:var(--color-accent-text);letter-spacing:0;font-size:1rem;font-style:italic;display:none;position:absolute;bottom:.35em;left:calc(100% + 16px);rotate:-3deg}@media (min-width:1120px){.anno{display:block}}.hero-desk{position:relative}.hero-desk:before{content:"";border-radius:var(--radius-lg);background:repeating-linear-gradient(transparent 0 26px, var(--color-rule-soft) 26px 27px), #fff;border:1px solid var(--color-rule);position:absolute;inset:14px -12px -16px 16px;transform:rotate(2.2deg)}.hero-card{z-index:1;background:var(--color-card);border:1px solid var(--color-rule);border-radius:var(--radius-lg);gap:12px;padding:20px;display:grid;position:relative;transform:rotate(-1.2deg);box-shadow:0 24px 60px -28px #0e151147}.hero-card:before,.hero-card:after{content:"";background:#ff7a0038;border:1px solid #ff7a001f;width:72px;height:20px;position:absolute;top:-10px}.hero-card:before{left:26px;rotate:-5deg}.hero-card:after{right:26px;rotate:4deg}.hero-card .yx-label{margin:0}.hero-card-q{margin:0;font-size:1.05rem;line-height:1.55}.fake-answer{background:#15803d0d;border:1.5px solid #15803d73;border-radius:10px;justify-content:space-between;align-items:center;gap:8px;padding:10px 12px;display:flex}.fake-answer code{font-family:var(--font-mono);font-size:.95rem}.fake-answer .ok{color:var(--color-success);font-size:.85rem;font-weight:700}.dots{gap:6px;display:flex}.dot{background:var(--color-rule);border-radius:99px;width:8px;height:8px}.dot-done{background:var(--color-primary)}.dot-now{background:var(--color-accent);animation:1.8s ease-in-out 2.2s infinite pulse}.edge-wrap{border-top:1px dashed var(--color-rule);padding-top:14px}.edge-svg{width:100%;height:auto;display:block;overflow:visible}.edge-svg .axis{stroke:var(--color-rule);stroke-width:1.5px}.curve{fill:none;stroke:var(--color-primary);stroke-width:3px;stroke-linecap:round;stroke-dasharray:1;stroke-dashoffset:1px;animation:1.3s cubic-bezier(.3,0,.2,1) .5s both draw}.edge-marker{stroke:var(--color-accent);stroke-width:2px;stroke-dasharray:4 5;opacity:0;animation:.4s 1.55s both fade-in}.curve-dot{fill:var(--color-accent);opacity:0;transform-box:fill-box;transform-origin:50%;animation:.35s cubic-bezier(.34,1.56,.64,1) 1.7s both pop}.curve-label{font-family:var(--font-serif);fill:var(--color-accent-text);opacity:0;font-size:15px;font-style:italic;animation:.5s 1.9s both fade-in}.hero-card-cap{color:var(--color-muted);margin:0;font-size:.75rem}.section{padding:72px 0}.section-head{gap:10px;max-width:640px;margin-bottom:40px;display:grid}.section-head h2{letter-spacing:-.03em;margin:0;font-size:clamp(1.8rem,3.6vw,2.6rem);line-height:1.05}.section-head .subtitle{margin:0;font-size:1.05rem}.try-grid{align-items:center;gap:40px;display:grid}.try-card{border:1.5px dashed var(--color-rule);background:var(--color-paper);border-radius:var(--radius-lg);gap:12px;padding:20px;display:grid}.try-meta{justify-content:space-between;align-items:center;gap:12px;display:flex}.try-meta .yx-label{margin:0}.soon-chip{font-family:var(--font-mono);text-transform:uppercase;letter-spacing:.1em;color:var(--color-accent-text);background:var(--color-accent-wash);white-space:nowrap;border-radius:99px;align-items:center;gap:7px;padding:4px 10px;font-size:.65rem;display:inline-flex}.pulse-dot{background:var(--color-accent);border-radius:99px;flex-shrink:0;width:7px;height:7px;animation:1.8s ease-in-out infinite pulse}.try-sample{margin:0;font-size:1.1rem;line-height:1.6}.try-row{border:1px solid var(--color-rule);background:var(--color-card);border-radius:10px;align-items:stretch;display:flex;overflow:hidden}.try-row .try-input{min-width:0;font-family:var(--font-mono);color:var(--color-muted);flex:1;padding:10px 12px;font-size:.9rem}.try-row .try-btn{border:none;border-left:1px solid var(--color-rule);background:var(--color-card);color:var(--color-muted);cursor:not-allowed;padding:10px 16px;font-weight:700}.try-cap{color:var(--color-muted);margin:0;font-size:.75rem}.pain-grid{align-items:center;gap:40px;display:grid}.check-list{gap:14px;max-width:560px;margin:20px 0 0;padding:0;list-style:none;display:grid}.check-list li{grid-template-columns:26px 1fr;align-items:start;gap:12px;display:grid}.check-list li p{margin:0}.check-list strong{font-family:var(--font-display)}.mark{font-family:var(--font-display);margin-top:3px;font-weight:800;display:inline-flex;transform:rotate(-7deg)}.mark-bad{color:var(--color-danger)}.mark-ok{color:var(--color-primary)}.graded-card{background:var(--color-card);border:1px solid var(--color-rule);border-radius:var(--radius-lg);box-shadow:var(--shadow-lift);width:100%;max-width:380px;margin:0 auto;padding:20px;position:relative;transform:rotate(1.4deg)}.stamp{border:2px solid var(--color-danger);color:var(--color-danger);font-family:var(--font-mono);text-transform:uppercase;letter-spacing:.12em;background:var(--color-paper);border-radius:6px;padding:4px 10px;font-size:.65rem;position:absolute;top:-13px;right:18px;rotate:-7deg}.graded-head{font-family:var(--font-mono);text-transform:uppercase;letter-spacing:.1em;color:var(--color-muted);border-bottom:1px solid var(--color-rule);padding-bottom:10px;font-size:.68rem}.graded-row{font-family:var(--font-mono);border-bottom:1px dashed var(--color-rule);justify-content:space-between;align-items:center;gap:12px;padding:10px 0;font-size:.82rem;display:flex}.graded-foot{justify-content:space-between;align-items:baseline;padding-top:14px;display:flex}.graded-foot .score{font-family:var(--font-display);color:var(--color-danger);letter-spacing:-.02em;font-size:1.7rem;font-weight:800}.graded-foot .remark{font-family:var(--font-serif);color:var(--color-danger);font-size:.95rem;font-style:italic}.ledger{border-bottom:1px solid var(--color-rule)}.ledger-row{border-top:1px solid var(--color-rule);grid-template-columns:96px 1fr auto;align-items:start;gap:20px;padding:22px 8px;transition:background-color .18s;display:grid}.ledger-row:hover{background:var(--color-ink-wash)}.ledger-num{font-family:var(--font-display);color:#0000;-webkit-text-stroke:1.4px var(--color-primary);font-variant-numeric:tabular-nums;font-size:clamp(2rem,4vw,2.6rem);font-weight:800;line-height:1;transition:color .2s,-webkit-text-stroke-color .2s}.ledger-row:hover .ledger-num{color:var(--color-accent);-webkit-text-stroke-color:var(--color-accent)}@supports not (-webkit-text-stroke:1px black){.ledger-num{color:var(--color-primary)}.ledger-row:hover .ledger-num{color:var(--color-accent)}}.ledger-body h3{margin:2px 0 6px;font-size:1.15rem}.ledger-body p{max-width:46ch;margin:0}.ledger-tag{font-family:var(--font-mono);text-transform:uppercase;letter-spacing:.12em;color:var(--color-muted);white-space:nowrap;padding-top:8px;font-size:.65rem}.punchline{max-width:52ch;margin:28px 0 0;font-size:1.05rem}.feature-list{border-bottom:1px solid var(--color-rule);margin:0;padding:0;list-style:none}.feature{border-top:1px solid var(--color-rule);grid-template-columns:56px 1fr 24px;align-items:start;gap:16px;padding:18px 8px;transition:background-color .18s;display:grid}.feature:hover{background:var(--color-card)}.feature-num{font-family:var(--font-mono);color:var(--color-muted);padding-top:4px;font-size:.8rem;transition:color .18s}.feature:hover .feature-num{color:var(--color-accent-text)}.feature-body h3{margin:0 0 4px;font-size:1.05rem}.feature-body p{color:var(--color-muted);max-width:60ch;margin:0}.feature-arrow{opacity:.3;margin-top:3px;transition:opacity .18s,transform .18s,color .18s}.feature:hover .feature-arrow{opacity:1;color:var(--color-accent-text);transform:translate(2px,-2px)}.faq-list{border-bottom:1px solid var(--color-rule);max-width:760px}.faq{border-top:1px solid var(--color-rule)}.faq summary{align-items:baseline;gap:16px;padding:18px 4px;list-style:none;display:flex}.faq-num{font-family:var(--font-mono);color:var(--color-accent-text);flex-shrink:0;width:2.4rem;font-size:.72rem}.faq-q{font-family:var(--font-display);letter-spacing:-.01em;flex:1;font-size:1.05rem;font-weight:700}.faq-icon{font-family:var(--font-mono);color:var(--color-muted);font-size:1.3rem;line-height:1;transition:transform .2s,color .2s}.faq[open] .faq-icon{color:var(--color-accent);transform:rotate(45deg)}.faq-a{color:var(--color-muted);max-width:62ch;margin:0;padding:0 4px 20px calc(2.4rem + 16px)}.band{color:var(--color-cream);background:linear-gradient(155deg, #2a8520 0%, var(--color-primary) 42%, #154f12 100%);padding:80px 0;position:relative;overflow:hidden}.band:before{content:"";pointer-events:none;background-image:linear-gradient(#ffffff0d 1px,#0000 1px),linear-gradient(90deg,#ffffff0d 1px,#0000 1px);background-size:28px 28px;position:absolute;inset:0;-webkit-mask-image:linear-gradient(#0000 30%,#000000e6);mask-image:linear-gradient(#0000 30%,#000000e6)}.band-inner{gap:14px;max-width:640px;display:grid;position:relative}.band .yx-label{color:var(--color-accent-soft);margin:0}.band h2{letter-spacing:-.03em;color:#fbf9f0;margin:0;font-size:clamp(2.2rem,5vw,3.4rem);line-height:1.02}.band .subtitle{color:#f5f2e6c7;margin:0}.band .actions{margin-top:10px}.band-micro{font-family:var(--font-mono);letter-spacing:.14em;text-transform:uppercase;color:#f5f2e68c;margin:6px 0 0;font-size:.68rem}.band :focus-visible{outline-color:var(--color-accent-soft)}.band-ghost{font-family:var(--font-serif);color:#faf9f40f;-webkit-user-select:none;user-select:none;pointer-events:none;font-size:clamp(10rem,26vw,20rem);font-style:italic;line-height:1;position:absolute;bottom:-4.5rem;right:-1.5rem}.site-footer{border-top:1px solid var(--color-rule);padding:36px 0 44px}.footer-inner{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:20px 24px;display:flex}.footer-brand{font-family:var(--font-display);letter-spacing:-.03em;margin:0;font-size:1.15rem;font-weight:800}.footer-brand span{color:var(--color-accent)}.footer-tag{color:var(--color-muted);margin:2px 0 0;font-size:.9rem;font-style:italic}.footer-links{flex-wrap:wrap;gap:16px;display:flex}.footer-links a{color:var(--color-muted);font-size:.875rem;font-weight:600;text-decoration:none}.footer-links a:hover{color:var(--color-accent-text)}.footer-micro{width:100%;font-family:var(--font-mono);letter-spacing:.14em;text-transform:uppercase;color:var(--color-muted);opacity:.7;margin:8px 0 0;font-size:.62rem}@keyframes fade-up{0%{opacity:0;transform:translateY(14px)}to{opacity:1;transform:translateY(0)}}@keyframes fade-in{0%{opacity:0}to{opacity:1}}@keyframes draw{to{stroke-dashoffset:0}}@keyframes pop{0%{opacity:0;transform:scale(.2)}to{opacity:1;transform:scale(1)}}@keyframes float{0%{transform:rotate(-1.2deg)translateY(0)}to{transform:rotate(-1.2deg)translateY(-8px)}}@keyframes pulse{50%{box-shadow:0 0 0 5px var(--color-accent-wash)}}@keyframes marquee{to{transform:translate(-50%)}}.rise{animation:.55s cubic-bezier(.22,.65,.25,1) both fade-up;animation-delay:calc(var(--d,0) * 1ms)}.float{animation:5.5s ease-in-out 2.6s infinite alternate float}@supports (animation-timeline:view()){@media (prefers-reduced-motion:no-preference){.reveal{animation:linear both fade-up;animation-timeline:view();animation-range:entry entry 42%}}}@media (min-width:640px){.container,.container-narrow{padding:0 24px}.answer-comparison-grid,.radar-legend{grid-template-columns:1fr 1fr}}@media (min-width:768px){.nav-desktop{display:flex}.nav-toggle,.nav-mobile{display:none}.show-mobile-only,.hide-desktop{display:none!important}.grid-2{grid-template-columns:1fr 1fr}.grid-3,.radar-legend{grid-template-columns:repeat(3,1fr)}.hero{align-items:center;min-height:min(800px,92svh);padding:96px 0 88px;display:flex}.hero-grid{grid-template-columns:1.05fr .95fr;gap:40px}.hero-desk{justify-self:end;width:100%;max-width:460px}.section{padding:96px 0}.try-grid{grid-template-columns:.85fr 1.15fr}.pain-grid{grid-template-columns:1.1fr .9fr}.faq-a{padding-left:calc(2.4rem + 16px)}}@media (max-width:767px){.hide-mobile{display:none!important}.show-mobile-only{display:block}.grid-2,.grid-3{grid-template-columns:1fr}h1:not(.hero-title){font-size:clamp(1.75rem,8vw,2.25rem)!important}h2{font-size:clamp(1.35rem,6vw,1.75rem)!important}.math-keyboard-group{flex-wrap:nowrap}.radar-label{display:none!important}.radar-letter{display:inline!important}.ticker-item{font-size:.72rem}.ledger-row{grid-template-columns:56px 1fr;gap:14px}.ledger-tag{grid-column:2;padding-top:0}.feature{grid-template-columns:40px 1fr}.feature-arrow{display:none}.faq-a{padding-left:4px}}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important;animation-delay:0s!important}}@media print{.auth-timeout,.no-print,.hero:before,.band:before,.band-ghost,.hero-card:before,.hero-card:after{display:none!important}}.ticker-track{animation:18s linear infinite marquee}.try-math-input{border:1px solid var(--color-rule);background:var(--color-card);border-radius:10px;gap:0;display:grid;overflow:hidden}.try-math-input .math-keyboard{border-bottom:1px solid var(--color-rule)}.try-math-input .try-row{border:none;border-radius:0}.try-math-input .try-row input{padding:12px;font-size:1rem}.try-math-input .try-btn{padding:12px 20px;font-weight:700}.try-math-input .try-btn:not(:disabled){cursor:pointer;color:var(--color-ink)}.try-math-input .try-btn:not(:disabled):hover{background:var(--color-primary-wash);color:var(--color-primary-text)}.try-result{border:1.5px solid var(--color-rule);background:var(--color-card);border-radius:10px;padding:16px}.try-result.correct{background:#15803d0d;border-color:#15803d73}.try-result.incorrect{background:#b91c1c0d;border-color:#b91c1c73}.try-result-header{margin-bottom:12px}.try-solution{border-top:1px solid var(--color-rule);margin-top:12px;padding-top:12px}.try-solution summary{cursor:pointer;color:var(--color-primary-text);margin-bottom:8px;font-weight:600}.try-solution p{margin:0;line-height:1.6}.features-layout{gap:40px;display:grid}@media (min-width:768px){.features-layout{grid-template-columns:1fr 1fr;align-items:start}}.radar-demo{border:1px solid var(--color-rule);border-radius:var(--radius-lg);background:var(--color-card);gap:12px;padding:20px;display:grid}.radar-demo .radar-wrap,.radar-demo p{margin:0}.dashboard-nav-center{align-items:center;gap:24px;margin:0 auto;display:none}.dashboard-nav-center a{color:var(--color-muted);font-size:.9rem;font-weight:600;text-decoration:none;transition:color .15s}.dashboard-nav-center a:hover{color:var(--color-accent-text)}@media (min-width:768px){.dashboard-nav-center{display:flex}}
