:root{--math-purple:#9174ec;--math-cyan:#67d4d6;--math-coral:#ff716b;--math-green:#86dfbd}
.math-page{overflow-x:hidden}.math-shell{width:min(1180px,calc(100% - 40px));margin-inline:auto}.math-hero{display:grid;grid-template-columns:1.05fr .95fr;gap:clamp(35px,8vw,110px);align-items:center;padding:clamp(70px,9vw,125px) 0}.math-kicker{display:block;margin-bottom:17px;color:#697984;font-size:11px;font-weight:750;letter-spacing:.21em}.math-hero h1{margin:0;color:var(--ink);font:700 clamp(48px,7vw,94px)/.91 var(--display,system-ui);letter-spacing:-.058em}.math-hero h1 em{color:var(--math-purple);font-style:normal}.math-hero p{max-width:650px;margin:28px 0 0;color:var(--muted);font-size:clamp(17px,2vw,21px);line-height:1.7}.math-hero-visual{position:relative;min-height:390px;border:1px solid var(--line);border-radius:48px 24px 60px 32px;background:radial-gradient(circle at 64% 28%,rgba(145,116,236,.2),transparent 30%),var(--paper-2);overflow:hidden}.math-ring{position:absolute;inset:52px;border:1px solid var(--line);border-radius:50%;transform:rotate(-12deg)}.math-ring:before,.math-ring:after{content:'';position:absolute;width:20px;height:20px;border-radius:6px;background:var(--math-cyan)}.math-ring:before{left:8%;top:18%}.math-ring:after{right:5%;bottom:20%;background:var(--math-purple)}.math-equation{position:absolute;inset:0;display:grid;place-items:center;color:var(--ink);font:700 clamp(22px,4vw,42px)/1.35 monospace;text-align:center}.math-equation span{color:var(--math-purple)}
.math-section{padding:clamp(72px,9vw,120px) 0;border-top:1px solid var(--line)}.math-section.alt{background:var(--paper-2)}.math-section-head{display:grid;grid-template-columns:.85fr 1.15fr;gap:clamp(30px,7vw,90px);align-items:end;margin-bottom:42px}.math-section-head h2{margin:0;color:var(--ink);font:700 clamp(36px,5vw,66px)/1 var(--display,system-ui);letter-spacing:-.045em}.math-section-head h2 em{color:var(--math-cyan);font-style:normal}.math-section-head p{margin:0;color:var(--muted);font-size:18px;line-height:1.7}.difference-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.difference-card{padding:29px;background:var(--paper);border:1px solid var(--line);border-radius:24px 46px 28px 36px}.difference-card:nth-child(2){border-radius:45px 24px 40px 28px}.difference-card>span{color:var(--math-purple);font:700 11px monospace;letter-spacing:.16em}.difference-card h3{margin:16px 0 10px;color:var(--ink);font-size:24px}.difference-card p{margin:0;color:var(--muted);line-height:1.65}.difference-card dl{margin:20px 0 0}.difference-card dl div{display:flex;justify-content:space-between;gap:12px;padding:10px 0;border-top:1px solid var(--line)}.difference-card dt{color:var(--muted);font-size:12px}.difference-card dd{margin:0;color:var(--ink);font-size:12px;font-weight:700}
.math-lab{overflow:hidden;background:linear-gradient(145deg,#101225,#07121f 72%,#111935);color:#f3f2ff;border:1px solid #393960;border-radius:34px 50px 38px 56px;box-shadow:0 32px 90px rgba(10,10,35,.18)}.math-lab-head{display:grid;grid-template-columns:1fr 1fr;gap:30px;padding:38px 42px;border-bottom:1px solid #333658}.math-lab-head span{display:block;margin-bottom:12px;color:#b6a3ff;font:700 11px system-ui;letter-spacing:.18em}.math-lab-head h2{margin:0;font-size:clamp(27px,3vw,42px)}.math-lab-head p{margin:0;color:#aaaec5;line-height:1.65}.math-input-wrap{padding:30px 42px;border-bottom:1px solid #333658}.math-input-wrap label{display:block;color:#aeb2ca;font-size:11px;letter-spacing:.12em}.math-input-wrap textarea{box-sizing:border-box;width:100%;min-height:92px;margin-top:10px;padding:17px;color:#f6f5ff;background:#090f20;border:1px solid #41466e;border-radius:14px;font:600 17px/1.55 system-ui;resize:vertical}.math-input-wrap textarea:focus{outline:3px solid rgba(145,116,236,.4);border-color:#a58cf4}.transform-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr))}.transform-card{min-width:0;padding:30px;border-right:1px solid #333658}.transform-card:last-child{border:0}.transform-card>span{color:#8f94ad;font-size:10px;letter-spacing:.13em}.transform-card h3{margin:12px 0 8px;font-size:22px}.transform-card>p{min-height:72px;margin:0;color:#9fa5bc;line-height:1.55}.transform-output{min-height:105px;margin-top:18px;padding:15px;overflow-wrap:anywhere;border:1px solid #333a60;border-radius:13px;background:#080e1c;color:#b8a6fa;font:600 13px/1.6 monospace}.transform-meta{margin-top:12px;color:#9096ae;font-size:11px;line-height:1.5}.math-actions{display:flex;flex-wrap:wrap;gap:9px;margin-top:15px}.math-actions button{min-height:42px;padding:10px 14px;color:#d3d1e5;background:#171d35;border:1px solid #454b72;border-radius:999px;font:700 12px system-ui;cursor:pointer}.math-actions button.primary{color:#0b1730;background:#ab96f4;border-color:#ab96f4}.math-actions button:disabled{opacity:.42;cursor:not-allowed}.decrypt-result{margin-top:12px;color:var(--math-green);font-size:13px;line-height:1.5}
.character-lab{display:grid;grid-template-columns:.72fr 1.28fr;gap:35px;padding:38px 42px;background:var(--paper);border:1px solid var(--line);border-radius:42px 24px 50px 30px}.character-lab h3{margin:0;color:var(--ink);font-size:clamp(27px,3vw,40px)}.character-lab p{color:var(--muted);line-height:1.65}.character-table{align-self:center;border-block:1px solid var(--line)}.character-row{display:grid;grid-template-columns:.55fr .8fr 1.15fr 1.5fr;gap:10px;padding:13px 8px;border-bottom:1px solid var(--line);align-items:center}.character-row:last-child{border-bottom:0}.character-row.header{color:var(--muted);font-size:10px;text-transform:uppercase;letter-spacing:.08em}.character-row b{color:var(--ink);font-size:21px}.character-row code{overflow-wrap:anywhere;color:#6f58c8;font-size:11px}.character-note{color:var(--muted);font-size:12px}
.number-lab{display:grid;grid-template-columns:.7fr 1.3fr;gap:35px;align-items:center;padding:38px 42px;background:linear-gradient(145deg,#071827,#07121e);color:#eef8f8;border:1px solid #2c4c61;border-radius:28px 48px 32px 56px}.number-lab h3{margin:0 0 11px;font-size:clamp(27px,3vw,40px)}.number-lab p{color:#9fb2bd;line-height:1.6}.number-input{box-sizing:border-box;width:100%;max-width:260px;padding:15px;color:#fff;background:#0b1d2d;border:1px solid #3a596d;border-radius:12px;font:700 18px monospace}.number-input:focus{outline:3px solid rgba(103,212,214,.35)}.number-values{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;overflow:hidden;border:1px solid #315064;border-radius:16px;background:#315064}.number-values div{padding:18px;background:#0a1b2a}.number-values span,.number-values b{display:block}.number-values span{color:#8299a6;font-size:10px;letter-spacing:.1em}.number-values b{margin-top:8px;color:#f0f9f8;font:700 clamp(17px,2vw,24px) monospace}.math-bits{display:grid;grid-template-columns:repeat(8,1fr);gap:6px;margin-top:17px}.math-bits button{min-width:0;padding:10px 2px;color:#718492;background:#102638;border:1px solid #315064;border-radius:9px;cursor:pointer}.math-bits button.on{color:#071823;background:var(--math-cyan);border-color:var(--math-cyan)}.math-bits small,.math-bits b{display:block}.math-bits small{font-size:9px}.math-bits b{margin-top:6px;font:700 19px monospace}
.math-topic-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.math-topic{display:flex;min-height:235px;flex-direction:column;padding:27px;color:inherit;background:var(--paper);border:1px solid var(--line);border-radius:23px 44px 28px 35px}.math-topic:nth-child(2n){border-radius:43px 23px 39px 28px}.math-topic>span{color:var(--math-purple);font:700 10px monospace;letter-spacing:.14em}.math-topic h3{margin:16px 0 9px;color:var(--ink);font-size:23px}.math-topic p{margin:0;color:var(--muted);line-height:1.58}.math-topic b{margin-top:auto;padding-top:18px;color:#458f95}.math-limit{margin-top:25px;padding:24px 27px;border-left:3px solid var(--math-coral);background:rgba(255,113,107,.06);color:var(--muted);line-height:1.65}.math-limit b{color:var(--ink)}
html[data-theme=dark] .math-hero-visual,html[data-theme=dark] .difference-card,html[data-theme=dark] .character-lab,html[data-theme=dark] .math-topic{background:#0b1b2b}html[data-theme=dark] .character-row code{color:#b8a6f4}
@media(max-width:900px){.math-hero,.math-section-head,.math-lab-head,.character-lab,.number-lab{grid-template-columns:1fr}.difference-grid,.math-topic-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.transform-grid{grid-template-columns:1fr}.transform-card{border-right:0;border-bottom:1px solid #333658}.transform-card>p{min-height:0}.number-values{margin-top:10px}}
@media(max-width:620px){.math-shell{width:min(100% - 28px,1180px)}.math-hero{padding-top:45px}.math-hero-visual{min-height:310px}.difference-grid,.math-topic-grid{grid-template-columns:1fr}.math-lab{border-radius:24px}.math-lab-head,.math-input-wrap,.transform-card,.character-lab,.number-lab{padding:27px 20px}.character-row{grid-template-columns:.45fr .75fr 1fr 1.3fr;gap:6px}.character-row code{font-size:9px}.number-values{grid-template-columns:1fr}.math-bits{gap:3px}.math-bits button{padding-inline:0}.math-bits small{font-size:8px}}