@font-face{font-family:Inter;src:url(fonts/inter-latin.woff2)}@font-face{font-family:Inter;src:url(fonts/inter-cyrillic.woff2);unicode-range:U+0400-052F}@font-face{font-family:Manrope;src:url(fonts/manrope.ttf);font-weight:200 800}@font-face{font-family:Lora;src:url(fonts/lora.ttf);font-weight:400 700}@font-face{font-family:Lora;src:url(fonts/lora-italic.ttf);font-style:italic;font-weight:400 700}@font-face{font-family:Mono;src:url(fonts/mono.ttf)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);background:var(--bg);font:15px/1.6 Inter,Arial,sans-serif;--bg:#fff;--ink:#18202a;--muted:#626976;--line:#dde1e6;--panel:#f5f6f8;--accent:#141d65;--radius:18px}a{color:inherit;text-decoration:none}button,input{font:inherit}button,a,input{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:focus-visible,a:focus-visible,input:focus-visible{outline:3px solid #5997ff;outline-offset:4px}button{color:inherit}button:disabled{cursor:default;color:var(--muted)}.wrap{max-width:1280px;margin:auto;padding:0 48px}.nav{height:88px;display:flex;align-items:center;gap:36px;border-bottom:1px solid var(--line)}.brand{font:700 20px Manrope;letter-spacing:-.8px;white-space:nowrap}.brand b{display:inline-flex;align-items:center;justify-content:center;font:500 18px Lora;border:1px solid currentColor;width:32px;height:32px;border-radius:50%;margin-right:9px}.navlinks{display:flex;gap:27px;font-size:13px;margin-left:auto}.lang{font-size:11px;white-space:nowrap}.lang span{color:var(--muted);margin-left:8px}.eyebrow{font:11px Mono,monospace;text-transform:uppercase;letter-spacing:1.1px}.hero{padding:58px 0 46px}.hero h1{font:500 clamp(42px,5.7vw,78px)/1.04 Manrope;letter-spacing:-3.4px;margin:22px 0}.hero h1 em{font-family:Lora;font-weight:400}.intro{max-width:520px;font-size:16px;color:var(--muted)}.actions{display:flex;align-items:center;gap:22px;margin:28px 0}.button{display:inline-flex;align-items:center;justify-content:center;gap:20px;padding:13px 23px;border:1px solid var(--ink);border-radius:99px;background:var(--ink);color:var(--bg);font-size:13px;font-weight:600;min-height:46px}.button.secondary{color:var(--ink);background:transparent}.textlink{font-size:13px}.herofoot{display:flex;justify-content:space-between;align-items:center;border-top:1px solid var(--line);padding:17px 0 0;margin-top:24px;font-size:11px}.sectionhead{display:flex;align-items:end;justify-content:space-between;margin:35px 0 20px;gap:20px}.sectionhead h2{font:500 30px Manrope;letter-spacing:-1.2px;margin:0}.sectionhead p{font-size:13px;color:var(--muted);margin:5px 0 0}.searchbar{display:flex;align-items:center;gap:12px;background:var(--panel);border:1px solid var(--line);border-radius:99px;padding:0 18px;max-width:510px}.searchbar input{background:none;border:0;min-width:0;width:100%;padding:15px 0;outline:none;color:var(--ink)}.filters{display:flex;gap:8px;overflow-x:auto;padding:5px 0 18px;scrollbar-width:none}.chip{white-space:nowrap;background:transparent;border:1px solid var(--line);padding:8px 16px;border-radius:99px;font-size:12px}.chip.on{background:var(--ink);color:var(--bg);border-color:var(--ink)}.grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}.case{display:flex;flex-direction:column;min-width:0;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:transform .2s,box-shadow .2s;background:var(--bg)}.case:hover{transform:translateY(-4px);box-shadow:0 12px 40px #0000000b}.case-body{padding:23px}.case .meta{font:10px Mono;color:var(--muted);display:flex;justify-content:space-between;gap:12px}.case h3{font:600 23px/1.24 Manrope;letter-spacing:-.7px;margin:17px 0 12px}.case p{font-size:13px;color:var(--muted);margin:0 0 20px}.case-bottom{border-top:1px solid var(--line);margin-top:auto;padding:14px 23px;display:flex;justify-content:space-between;font-size:11px}.cover{height:126px;position:relative;overflow:hidden;display:flex;align-items:center;justify-content:center;background:#e6e9f4;color:#1b2863}.cover .sheet{background:#ffffffeb;transform:rotate(-8deg);width:125px;height:155px;border:1px solid #fff;box-shadow:8px 8px 0 #ffffff40;padding:25px 18px}.sheet i{display:block;height:3px;background:currentColor;opacity:.23;margin-bottom:12px}.sheet i:nth-child(2){width:55%;background:#b6ca7b;opacity:1;height:12px}.cover .number{position:absolute;right:17px;bottom:8px;font:42px Lora;opacity:.5}.case:nth-child(3n+2) .cover{background:#e6eedf;color:#354d26}.case:nth-child(3n) .cover{background:#f0e5db;color:#74513b}.levels{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;padding:55px 0}.level{border-top:1px solid var(--line);padding:18px 0}.level strong{font:500 21px Manrope}.level p{color:var(--muted);font-size:13px}.foot{padding:30px 0;border-top:1px solid var(--line);display:flex;justify-content:space-between;font-size:12px;color:var(--muted)}
/* 01 / Atlas — editorial contrast */
.atlas .hero{display:grid;grid-template-columns:1.1fr 1fr;column-gap:55px;padding-top:48px}.atlas .hero h1{font-size:clamp(42px,5.2vw,70px)}.atlas .heroart{margin-top:0;background:#0b104a url(atlas-art.svg) center/cover;border-radius:5px;min-height:430px;position:relative;overflow:hidden}.art-label{position:absolute;top:25px;left:27px;color:#e8e8f3;font:10px Mono;letter-spacing:2px}.art-caption{position:absolute;bottom:30px;left:30px;color:#fff;font:italic 31px Lora;line-height:1.2}.orbit{position:absolute;top:70px;right:45px;width:145px;height:145px;border:1px solid #c5bcf382;border-radius:50%;box-shadow:0 0 0 20px #a3a5dc08,0 0 0 40px #a3a5dc08}.atlas .herofoot{grid-column:1/-1}.atlas .case{border-radius:5px}.atlas .cover{height:120px}.atlas .hero .eyebrow{color:#536085}.atlas .case h3{font-weight:500}.atlas .sectionhead h2{font-family:Lora;font-weight:400}
/* 02 / Practice — an instrument with a strong accent */
.tool{--bg:#101211;--ink:#f1f4ef;--muted:#a1aaa3;--line:#333b35;--panel:#1d231f;--accent:#c1ee95;--radius:19px}.tool .hero{display:grid;grid-template-columns:1.15fr 1fr;gap:40px}.tool .hero h1{font-weight:600;font-size:clamp(43px,5.5vw,74px)}.tool .hero h1 em{font:inherit;color:#c1ee95}.tool .hero .button{background:#c1ee95;color:#151e12;border-color:#c1ee95}.tool .herofoot{grid-column:1/-1;margin-top:0}.terminal{background:#1b211d;border:1px solid #45503f;border-radius:20px;padding:26px;margin-top:8px;position:relative}.terminal-top{display:flex;justify-content:space-between;font:11px Mono;color:#c1ee95;border-bottom:1px solid #45503f;padding-bottom:18px}.terminal h3{font:500 25px/1.25 Manrope;margin:25px 0 15px}.terminal p{font:12px/1.8 Mono;color:#b9c4ba}.terminal .terminal-result{background:#c1ee9510;border-left:2px solid #c1ee95;padding:12px 15px;font:12px Inter;color:#c1ee95;margin:22px 0}.tool .cover{display:none}.tool .case h3{font-size:22px}.tool .case{background:#191e1a}.tool .case .meta{color:#c1ee95}.tool .grid{gap:12px}.tool .case-body{padding:23px}.tool .hero .eyebrow{color:#c1ee95}.tool .nav .brand b{background:#c1ee95;color:#101211;border:0}
/* 03 / Guide — a gentle invitation with an editorial image */
.guide{--bg:#fcfcf9;--ink:#233c3d;--muted:#5c7171;--line:#d7e1dd;--panel:#edf2ee;--radius:25px}.guide .hero{text-align:center;padding-top:42px;position:relative}.guide .hero h1{font-size:clamp(43px,5.3vw,72px);letter-spacing:-3px}.guide .hero h1 em{color:#2d7678}.guide .intro{margin:0 auto;max-width:560px}.guide .actions{justify-content:center}.guide .heroart{height:150px;background:#a8d5df url(guide-art.svg) center 54%/cover;border-radius:100px 100px 15px 15px;margin:32px 0 0;position:relative}.guide .herofoot{margin-top:18px}.guide .case:nth-child(3n+1){background:#eaf0fa}.guide .case:nth-child(3n+2){background:#edf1de}.guide .case:nth-child(3n){background:#f7e7dc}.guide .cover{height:125px;background:transparent!important}.guide .case{border:0}.guide .sheet{transform:rotate(8deg)}.guide .sectionhead h2{font-family:Manrope}.guide .hero .eyebrow{color:#5e7978}.guide .art-caption{font:11px Mono;color:#224c50;bottom:20px;left:26px}.guide .searchbar{margin:auto;max-width:550px}.guide .hero .actions{margin:24px 0}
/* shared case page */
.detail{max-width:900px;margin:auto;padding:30px 32px 110px}.back{font-size:12px;color:var(--muted)}.detail h1{font:500 clamp(32px,4.2vw,56px)/1.13 Manrope;letter-spacing:-1.7px;margin:18px 0}.detail .eyebrow{margin-top:32px;color:var(--muted)}.caselead{font-size:18px;max-width:730px;color:var(--muted)}.detail .quick{display:flex;gap:15px;align-items:center;margin:24px 0 35px}.detail section{padding:23px 0;border-top:1px solid var(--line)}.detail h2{font:500 24px Manrope;letter-spacing:-.6px;margin:0 0 14px}.detail p{line-height:1.8}.detail li{margin:12px 0;padding-left:8px}.detail .result{background:var(--panel);padding:25px;border:0;border-radius:15px;margin-bottom:20px}.promptbox{background:#141a23;color:#e9edf4;border-radius:18px;overflow:hidden}.prompthead{position:sticky;top:0;background:#202733;display:flex;justify-content:space-between;gap:10px;padding:15px 20px;align-items:center}.prompthead span{font:11px Mono}.copy{background:#f0f4e9;color:#1b241a;border:0;border-radius:99px;padding:10px 17px;font-size:12px}.prompttext{font:13px/1.9 Mono,monospace;white-space:pre-wrap;overflow-wrap:anywhere;margin:0;padding:24px;max-height:560px;overflow:auto}.prompttext mark{background:#929fe526;color:#d6c8ff;border-radius:3px}.source{font-size:12px;color:var(--muted)}.mobile-copy{display:none}.empty{padding:40px;border:1px solid var(--line);border-radius:20px}.detail .hidden{display:none}
@media(max-width:760px){.wrap{padding:0 22px}.nav{height:70px;gap:15px}.brand{font-size:17px}.brand b{width:26px;height:26px;font-size:15px}.navlinks{display:none}.lang{margin-left:auto;font-size:10px}.hero,.atlas .hero,.tool .hero{display:block;padding:35px 0 25px}.hero h1,.atlas .hero h1,.tool .hero h1,.guide .hero h1{font-size:44px;letter-spacing:-2.1px;line-height:1.07}.intro{font-size:14px}.atlas .heroart{min-height:230px;margin:28px 0 0}.orbit{width:90px;height:90px;top:25px;right:30px}.art-caption{font-size:25px}.herofoot{font-size:10px;gap:20px;align-items:start}.herofoot span:last-child{text-align:right}.grid{grid-template-columns:1fr}.sectionhead{margin-top:25px}.sectionhead h2{font-size:25px}.sectionhead a{font-size:11px;white-space:nowrap}.case h3{font-size:24px}.case .cover{height:150px}.terminal{margin-top:30px}.tool .terminal h3{font-size:23px}.guide .hero{text-align:left}.guide .hero .actions{justify-content:flex-start}.guide .heroart{height:150px;border-radius:50px 50px 12px 12px}.guide .art-caption{font-size:10px}.levels{grid-template-columns:1fr;gap:0;padding:35px 0}.level{padding:18px 0}.foot{font-size:10px}.detail{padding:24px 22px 120px}.detail h1{font-size:36px}.caselead{font-size:16px}.detail .quick{flex-wrap:wrap}.detail p{font-size:14px}.detail section{padding:22px 0}.detail .result{padding:20px}.detail h2{font-size:22px}.prompttext{font-size:12px;padding:18px;max-height:none;overflow:visible}.prompthead{padding:12px}.prompthead span{font-size:10px}.copy{font-size:11px;padding:10px 12px}.mobile-copy{display:block;position:fixed;bottom:0;left:0;right:0;padding:12px 20px calc(12px + env(safe-area-inset-bottom));background:var(--bg);border-top:1px solid var(--line);z-index:5}.mobile-copy .button{width:100%}.searchbar{max-width:none}.guide .intro{margin:0}.herofoot .eyebrow{letter-spacing:0}.detail .source{font-size:11px}.art-label{font-size:9px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.case{transition:none}}