:root{--violet: #0F766E;--violet-2: #14B8A6;--violet-deep: #0F172A;--violet-pale: #CCFBF1;--cyan: #14B8A6;--yellow: #F59E0B;--ink: #0F172A;--muted: #475569;--muted-2: #94A3B8;--bg: #FFFFFF;--bg-alt: #F1F5F9;--line: #E2E8F0;--shadow-hover: 0 24px 60px -16px rgba(15,118,110,.28), 0 4px 12px rgba(15,23,42,.06);--grad: linear-gradient(110deg, #0F766E 0%, #0E7490 50%, #0891B2 100%)}*{box-sizing:border-box}html,body{margin:0;padding:0}body{font-family:Inter,system-ui,sans-serif;color:var(--ink);background:var(--bg);font-size:16px;line-height:1.55;-webkit-font-smoothing:antialiased;overflow-x:hidden}h1,h2,h3,h4{font-family:Sora,sans-serif;letter-spacing:-.02em;color:var(--ink);margin:0}a{color:inherit;text-decoration:none}.topband{height:4px;background:linear-gradient(92deg,#0f766e,#0e7490,#0891b2)}.wrap{max-width:1240px;margin:0 auto;padding:0 32px}header.site{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:50;overflow:visible}.nav{display:flex;align-items:center;justify-content:space-between;height:80px}.nav-right{display:flex;align-items:center;gap:20px}.brand{display:flex;align-items:center;gap:12px;flex-shrink:0}.brand img.logo-img{height:160px;width:auto;display:block;transform:translateY(5px);transition:height .3s ease}nav.links{display:flex;gap:4px;align-items:center}nav.links a{padding:10px 16px;border-radius:10px;font-weight:500;font-size:14.5px;color:var(--ink);display:inline-flex;align-items:center;gap:6px;transition:background .15s,color .15s}nav.links a:hover{background:var(--violet-pale);color:var(--violet)}nav.links a.active{color:var(--violet);position:relative;font-weight:600}nav.links a.active:after{content:"";position:absolute;left:16px;right:16px;bottom:4px;height:2px;background:var(--violet);border-radius:2px}.cta-primary{display:inline-flex;align-items:center;gap:10px;padding:12px 22px;border-radius:14px;background:var(--grad);background-size:200% 100%;background-position:0% 50%;color:#fff;font-weight:600;font-size:14.5px;border:0;cursor:pointer;box-shadow:0 10px 22px -8px #0f766e8c,inset 0 1px #ffffff2e;transition:background-position .45s ease,transform .2s,box-shadow .25s;position:relative;overflow:hidden;font-family:Inter,sans-serif}.cta-primary:after{content:"";position:absolute;top:0;left:-60%;width:40%;height:100%;background:linear-gradient(110deg,transparent 0%,rgba(255,255,255,.28) 50%,transparent 100%);transform:skew(-18deg);transition:left .65s ease;pointer-events:none}.cta-primary>*{position:relative;z-index:1}.cta-primary:hover{background-position:100% 50%;transform:translateY(-2px);box-shadow:0 16px 34px -10px #0f766ea6}.cta-primary:hover:after{left:130%}.crumbs{padding:18px 0;font-size:13px;color:var(--muted-2);display:flex;align-items:center;gap:8px}.crumbs a{color:var(--violet)}.crumbs a:hover{text-decoration:underline}.crumbs .sep{color:var(--muted-2);opacity:.5}.page-hero{padding:20px 0 60px;position:relative}.page-hero-inner{display:grid;grid-template-columns:1.3fr 1fr;gap:60px;align-items:end}.eyebrow{display:inline-flex;align-items:center;gap:10px;font-family:JetBrains Mono,monospace;font-size:12px;color:var(--violet);letter-spacing:.14em;text-transform:uppercase;margin-bottom:18px;font-weight:500}.eyebrow:before{content:"";width:24px;height:1px;background:var(--violet)}h1.page-title{font-size:clamp(44px,5vw,64px);font-weight:700;line-height:1.02;margin-bottom:22px;text-wrap:balance}.grad-text{background:linear-gradient(110deg,#0f766e,#0e7490,#0891b2);-webkit-background-clip:text;background-clip:text;color:transparent}.page-lede{font-size:17.5px;color:var(--muted);max-width:540px;line-height:1.6;margin:0}.hero-stats{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;padding-bottom:4px}.hero-stat{background:var(--bg-alt);border-radius:18px;padding:20px 22px;border:1px solid var(--line);position:relative;overflow:hidden}.hero-stat .num{font-family:Sora,sans-serif;font-size:36px;font-weight:700;line-height:1;letter-spacing:-.03em;background:linear-gradient(135deg,#0f766e,#0891b2);-webkit-background-clip:text;background-clip:text;color:transparent}.hero-stat .lbl{font-size:13px;color:var(--muted);margin-top:6px;font-weight:500}.search-bar{background:#fff;border:1.5px solid var(--line);border-radius:16px;padding:4px 4px 4px 22px;display:flex;align-items:center;gap:14px;max-width:620px;transition:border-color .2s,box-shadow .2s;margin-top:30px}.search-bar:focus-within{border-color:var(--violet);box-shadow:0 0 0 4px #0f766e1f}.search-bar svg.ic{color:var(--muted-2);flex-shrink:0}.search-bar input{flex:1;border:0;outline:0;background:transparent;font-family:Inter,sans-serif;font-size:15px;color:var(--ink);padding:14px 0}.search-bar input::placeholder{color:var(--muted-2)}.search-shortcut{font-family:JetBrains Mono,monospace;font-size:11px;color:var(--muted-2);padding:6px 10px;border:1px solid var(--line);border-radius:8px;background:var(--bg-alt)}.search-chips{display:flex;gap:8px;margin-top:16px;flex-wrap:wrap;font-size:13px;color:var(--muted-2);align-items:center}.search-chips>span:first-child{font-weight:500}.chip-link{padding:4px 10px;border-radius:999px;background:var(--bg-alt);color:var(--violet);font-weight:500;cursor:pointer;transition:background .15s}.chip-link:hover{background:var(--violet-pale)}.no-result{display:none;padding:40px 0 0;color:var(--muted);font-size:15px}.no-result.show{display:block}.theme-section{padding:56px 0 0}.theme-section.hidden{display:none}.theme-head{display:flex;align-items:flex-end;justify-content:space-between;gap:40px;margin-bottom:32px;padding-bottom:20px;border-bottom:1px solid var(--line)}.theme-head-left{display:flex;align-items:center;gap:18px}.theme-num{width:56px;height:56px;border-radius:50%;background:var(--cyan);display:grid;place-items:center;flex-shrink:0;font-family:Sora,sans-serif;font-size:18px;font-weight:700;color:var(--violet-deep);letter-spacing:.02em}.theme-num.yellow{background:var(--yellow)}.theme-title{font-size:30px;font-weight:700;line-height:1;letter-spacing:-.025em}.theme-meta{font-size:13px;color:var(--muted);font-weight:500;font-variant-numeric:tabular-nums}.theme-meta b{color:var(--ink);font-weight:600;font-family:Sora}.chap-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.chap-card{position:relative;background:#fff;border-radius:20px;border:1px solid var(--line);padding:32px 26px 26px;cursor:pointer;transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;display:flex;flex-direction:column;align-items:center;text-align:center;gap:18px;min-height:280px;overflow:hidden}.chap-card.hidden{display:none}.chap-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:#0f766e40}.chap-card:before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,transparent,var(--violet-2),transparent);opacity:0;transition:opacity .25s}.chap-card:hover:before{opacity:1}.chap-icon{width:84px;height:84px;border-radius:50%;background:var(--cyan);display:grid;place-items:center;flex-shrink:0;position:relative;transition:transform .25s ease}.chap-icon.yellow{background:var(--yellow)}.chap-icon svg{width:46px;height:46px;stroke:var(--violet-deep);fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}.chap-card:hover .chap-icon{transform:scale(1.04)}.chap-order{position:absolute;top:16px;right:18px;font-family:JetBrains Mono,monospace;font-size:11px;color:var(--muted-2);font-weight:500;letter-spacing:.05em}.chap-title{font-family:Sora,sans-serif;font-weight:700;font-size:18px;color:var(--violet);line-height:1.25;letter-spacing:-.01em;text-wrap:balance}.chap-desc{font-size:13.5px;color:var(--muted);line-height:1.55;flex:1;max-width:260px;margin:0}.chap-foot{display:flex;align-items:center;justify-content:center;gap:10px;width:100%;padding-top:14px;border-top:1px solid var(--line)}.chap-tags{display:flex;gap:6px;flex-wrap:wrap;justify-content:center}.chap-tag{font-size:11px;font-weight:500;padding:4px 9px;border-radius:999px;font-family:Inter;letter-spacing:.01em}.chap-tag.new{background:#14b8a626;color:#0f766e}.chap-tag.new:before{content:"● ";font-size:8px;vertical-align:1px}.chap-tag.core{background:var(--violet-pale);color:var(--violet)}.chap-arrow{width:26px;height:26px;border-radius:50%;display:grid;place-items:center;color:var(--muted-2);transition:color .2s,transform .25s,background .2s;flex-shrink:0}.chap-card:hover .chap-arrow{color:var(--violet);background:var(--violet-pale);transform:translate(2px)}.bottom-band{margin-top:90px;padding:64px 0 80px;background:radial-gradient(60% 120% at 20% 100%,rgba(20,184,166,.14),transparent 60%),radial-gradient(50% 100% at 90% 0%,rgba(8,145,178,.14),transparent 60%),var(--bg-alt);position:relative;overflow:hidden}.bottom-band-inner{display:grid;grid-template-columns:1.5fr 1fr;gap:60px;align-items:center}.bottom-band h3{font-size:30px;font-weight:700;line-height:1.15;margin-bottom:14px;text-wrap:balance}.bottom-band p{font-size:15.5px;color:var(--muted);line-height:1.6;max-width:480px;margin:0 0 24px}.bottom-actions{display:flex;gap:14px;align-items:center;flex-wrap:wrap}.cta-ghost{display:inline-flex;align-items:center;gap:8px;padding:13px 22px;border-radius:14px;color:var(--ink);font-weight:600;font-size:14.5px;background:transparent;border:1.5px solid var(--line);cursor:pointer;transition:all .18s;font-family:Inter}.cta-ghost:hover{border-color:var(--violet);color:var(--violet)}.band-art{position:relative;display:grid;place-items:center}.band-art-core{width:210px;height:210px;border-radius:50%;background:conic-gradient(from 220deg,#0f766e,#14b8a6,#0891b2,#0f766e);filter:blur(36px);opacity:.5;position:absolute}.band-art svg{position:relative;z-index:1;width:260px;height:260px}footer.site-footer{position:relative;background:radial-gradient(80% 120% at 8% 100%,rgba(20,184,166,.24),transparent 60%),radial-gradient(70% 120% at 92% 0%,rgba(8,145,178,.22),transparent 60%),linear-gradient(180deg,#0f2a33,#081b22);color:#e4e4f0;padding:84px 0 32px;overflow:hidden;font-family:Inter,sans-serif}footer.site-footer:before{content:"";position:absolute;top:0;left:0;right:0;height:1px;background:linear-gradient(90deg,transparent,rgba(20,184,166,.6),rgba(8,145,178,.6),transparent)}footer.site-footer .foot-top{display:grid;grid-template-columns:1.15fr 2fr;gap:80px;padding-bottom:48px;border-bottom:1px solid rgba(255,255,255,.08);align-items:flex-start;position:relative;z-index:1}footer.site-footer .foot-brand{display:flex;flex-direction:column;max-width:340px}footer.site-footer .foot-word{font-family:Sora,sans-serif;font-weight:600;font-size:20px;color:#fff;letter-spacing:-.01em;margin-bottom:14px}footer.site-footer .foot-brand p{margin:0;font-size:13.5px;color:#e4e4f09e;line-height:1.7}footer.site-footer .foot-cols{display:grid;grid-template-columns:repeat(3,1fr);gap:40px}footer.site-footer h4{font-family:Sora;font-size:13px;color:#fff;margin:0 0 18px;font-weight:600;letter-spacing:-.01em}footer.site-footer ul{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:12px}footer.site-footer a{color:#e4e4f09e;font-size:14px;transition:color .15s}footer.site-footer a:hover{color:#fff}footer.site-footer .legal{padding-top:28px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:16px;font-size:12.5px;color:#e4e4f06b;position:relative;z-index:1}footer.site-footer .legal-links{display:flex;gap:22px}footer.site-footer .legal a{color:#e4e4f06b;font-size:12.5px}footer.site-footer .legal a:hover{color:#fff}@media(max-width:960px){nav.links{display:none}.page-hero-inner{grid-template-columns:1fr;gap:40px}.chap-grid{grid-template-columns:repeat(2,1fr)}.bottom-band-inner{grid-template-columns:1fr;gap:40px}footer.site-footer .foot-top{grid-template-columns:1fr;gap:40px}}@media(max-width:620px){.chap-grid{grid-template-columns:1fr}.theme-head{flex-direction:column;align-items:flex-start;gap:12px}h1.page-title{font-size:36px}.hero-stats{grid-template-columns:1fr 1fr;gap:10px}.hero-stat{padding:14px 16px}.hero-stat .num{font-size:28px}footer.site-footer .foot-cols{grid-template-columns:1fr 1fr;gap:28px}.wrap{padding:0 20px}}.chap-card{animation:cardIn .5s ease both}@keyframes cardIn{0%{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}:root{--violet: #2453A6;--violet-2: #1D4389;--violet-deep: #202124;--violet-pale: #E8EDF7;--cyan: #2453A6;--yellow: #E5C755;--ink: #202124;--muted: #5F6268;--muted-2: #78756F;--bg: #FBF8F1;--bg-alt: #F2EDE4;--line: #D8D2C7;--shadow-hover: none;--grad: #2453A6}body{color:#202124;background-color:#fbf8f1}h1,h2,h3,h4,h1.page-title,.theme-title,.chap-title,.bottom-band h3{font-family:Georgia,Times New Roman,serif;color:#202124}.wrap{max-width:1240px}.crumbs{padding:17px 0;color:#78756f;border-bottom:1px solid rgba(216,210,199,.7)}.crumbs a{color:#2453a6}.crumbs .sep{color:#c6403d;opacity:1}.page-hero{padding:48px 0 64px;overflow:hidden;background-color:#fbf8f1;background-image:repeating-linear-gradient(to bottom,transparent 0,transparent 31px,rgba(36,83,166,.052) 31px,rgba(36,83,166,.052) 32px);border-bottom:1px solid #D8D2C7}.page-hero:before{content:"";position:absolute;inset:0 auto 0 max(24px,calc((100vw - 1240px)/2 + 10px));width:1px;background:#c6403d61}.page-hero-inner{position:relative;z-index:1;grid-template-columns:minmax(0,1.35fr) minmax(300px,.8fr);gap:72px;align-items:center}.eyebrow{margin-bottom:17px;padding:0 3px 2px;gap:8px;color:#2453a6;font-family:Caveat,cursive;font-size:20px;font-weight:700;letter-spacing:.02em;text-transform:none;border-bottom:2px solid #E5C755}.eyebrow:before{width:18px;height:2px;background:#c6403d;transform:rotate(-5deg)}h1.page-title{max-width:760px;margin-bottom:24px;font-size:clamp(44px,5vw,65px);font-weight:700;line-height:1.04;letter-spacing:-.04em}.grad-text{position:relative;display:inline-block;color:#2453a6;background:none;-webkit-background-clip:border-box;background-clip:border-box;-webkit-text-fill-color:currentColor}.grad-text:after{content:"";position:absolute;right:0;bottom:-.07em;left:0;height:3px;background:#c6403d;transform:rotate(-.7deg);transform-origin:left}.page-lede{max-width:620px;color:#4e5157;font-size:17px;line-height:1.7}.page-exercises-cta{margin:18px 0 0}.page-exercises-cta a{display:inline-flex;align-items:center;gap:9px;padding:11px 15px;border:1px solid #2453A6;border-radius:4px;background:#2453a6;color:#fff;font-size:14px;font-weight:700;text-decoration:none}.page-exercises-cta a:hover{border-color:#1d4389;background:#1d4389}.search-bar{max-width:650px;margin-top:31px;padding:3px 3px 3px 18px;background:#fffcf6;border:1px solid #BEB7AA;border-radius:5px;box-shadow:4px 4px #ddd6c9;transition:border-color .15s,box-shadow .15s}.search-bar:focus-within{border-color:#2453a6;box-shadow:4px 4px #d8d2c7}.search-bar svg.ic{color:#2453a6}.search-bar input{color:#202124}.search-bar input::placeholder{color:#78756f}.search-shortcut{color:#5f6268;background:#f2ede4;border-color:#d8d2c7;border-radius:4px}.search-chips{color:#78756f}.search-chips>span:first-child{color:#c6403d;font-family:Caveat,cursive;font-size:17px;font-weight:700}.chip-link{padding:3px 7px;color:#2453a6;background:transparent;border-radius:0;border-bottom:1px solid #D8D2C7}.chip-link:hover{color:#1d4389;background:transparent;border-bottom-color:#2453a6}.hero-stats{position:relative;gap:0;padding:18px 22px 18px 42px;background-color:#fffcf6;background-image:repeating-linear-gradient(to bottom,transparent 0,transparent 31px,rgba(36,83,166,.055) 31px,rgba(36,83,166,.055) 32px);border:1px solid #BEB7AA;border-radius:5px;box-shadow:7px 7px #ddd6c9}.hero-stats:before{content:"";position:absolute;top:0;bottom:0;left:25px;width:1px;background:#c6403d7a}.hero-stat{min-height:104px;padding:18px 17px;background:#ffffff47;border:0;border-radius:0;overflow:visible}.hero-stat:nth-child(odd){border-right:1px solid #D8D2C7}.hero-stat:nth-child(-n+2){border-bottom:1px solid #D8D2C7}.hero-stat .num{color:#2453a6;background:none;-webkit-background-clip:border-box;background-clip:border-box;-webkit-text-fill-color:currentColor;font-family:JetBrains Mono,monospace;font-size:31px;font-weight:700;letter-spacing:-.04em}.hero-stat:nth-child(2) .num,.hero-stat:nth-child(4) .num{color:#c6403d}.hero-stat .lbl{color:#5f6268}.no-result{margin:36px 0 0;padding:18px 20px;color:#c6403d;background:#fffcf6;border:1px solid #D8D2C7;border-left:3px solid #C6403D;border-radius:4px}.theme-section{padding-top:76px}.theme-head{margin-bottom:25px;padding-bottom:15px;border-bottom:1px solid #BEB7AA}.theme-head-left{gap:15px}.theme-num,.theme-num.yellow{width:auto;height:auto;padding:0 3px 2px;color:#2453a6;background:transparent;border-radius:0;border-bottom:3px solid #C6403D;font-family:Caveat,cursive;font-size:27px;line-height:1;transform:rotate(-2deg)}.theme-num.yellow{color:#8a7009;border-bottom-color:#e5c755}.theme-title{font-size:31px;font-weight:700;line-height:1.1;letter-spacing:-.025em}.theme-meta{color:#6c6963}.theme-meta b{color:#2453a6;font-family:JetBrains Mono,monospace;font-weight:600}.chap-grid{gap:18px}.chap-card{min-height:292px;padding:28px 26px 24px;align-items:flex-start;gap:16px;text-align:left;background-color:#fffcf6;background-image:repeating-linear-gradient(to bottom,transparent 0,transparent 31px,rgba(36,83,166,.035) 31px,rgba(36,83,166,.035) 32px);border:1px solid #D8D2C7;border-radius:5px;box-shadow:none;overflow:hidden;transition:border-color .15s,box-shadow .15s}.chap-card:hover,.chap-card:focus-visible{transform:none;border-color:#2453a6;box-shadow:4px 4px #d8d2c7;outline:none}.chap-card:before{inset:0 auto 0 16px;width:1px;height:auto;background:#c6403d59;opacity:1}.chap-icon,.chap-icon.yellow{width:58px;height:58px;margin-left:5px;color:#2453a6;background:#fffcf6c7;border:1px solid #2453A6;border-radius:4px}.chap-icon.yellow{color:#8a7009;border-color:#c5a92f}.chap-icon svg{width:36px;height:36px;stroke:currentColor}.chap-card:hover .chap-icon{transform:none}.chap-order{top:14px;right:17px;color:#c6403d;font-family:Caveat,cursive;font-size:19px;font-weight:700;letter-spacing:.03em;transform:rotate(2deg)}.chap-title{color:#202124;font-size:20px;font-weight:700;line-height:1.25;letter-spacing:-.015em}.chap-desc{max-width:none;color:#5f6268;font-size:13.5px;line-height:1.62}.chap-foot{justify-content:space-between;border-top-color:#d8d2c7}.chap-tags{justify-content:flex-start}.chap-tag{padding:3px 0 2px;color:#2453a6;background:transparent;border-radius:0;border-bottom:2px solid #E5C755}.chap-tag.new,.chap-tag.core{color:#2453a6;background:transparent}.chap-tag.new:before{color:#c6403d}.chap-arrow{width:29px;height:29px;color:#2453a6;border:1px solid #2453A6;border-radius:4px;background:#fffcf6}.chap-card:hover .chap-arrow{color:#fffcf6;background:#2453a6;transform:none}.bottom-band{margin-top:94px;padding:68px 0 76px;background:#f2ede4;border-top:3px double #2453A6;border-bottom:1px solid #D8D2C7}.bottom-band:before{content:"";position:absolute;inset:0 auto 0 max(24px,calc((100vw - 1240px)/2 + 10px));width:1px;background:#c6403d61}.bottom-band-inner{position:relative;z-index:1}.bottom-band h3{font-size:32px}.bottom-band .grad-text:after{background:#e5c755}.bottom-band p{color:#4e5157}.cta-primary{padding:12px 21px;color:#fff;background:#2453a6;border:1px solid #1D4389;border-radius:4px;box-shadow:none;transition:background .15s}.cta-primary:after{display:none}.cta-primary:hover{color:#fff;background:#1d4389;transform:none;box-shadow:none}.cta-ghost{padding:11px 17px;color:#2453a6;background:#fffcf6;border:1px solid #2453A6;border-radius:4px}.cta-ghost:hover{color:#fff;background:#2453a6}.band-art-core{display:none}.band-art svg{width:250px;height:250px}.band-art svg rect{fill:#fffcf6!important;stroke:#beb7aa!important;filter:none!important}.band-art svg text{fill:#202124!important;font-family:Georgia,Times New Roman,serif!important}.band-art svg line{stroke:#d8d2c7!important}.band-art svg path{stroke:#2453a6!important}.band-art svg circle{fill:#c6403d!important}.band-art svg circle:nth-of-type(2){fill:#e5c755!important}@media(prefers-reduced-motion:reduce){.chap-card{animation:none}}@media(max-width:960px){.page-hero-inner{grid-template-columns:1fr;gap:44px}.hero-stats{max-width:620px}.bottom-band-inner{gap:34px}}@media(max-width:620px){.page-hero{padding:34px 0 48px}.page-hero:before,.bottom-band:before{left:11px}h1.page-title{font-size:38px}.page-lede{font-size:16px}.search-bar{padding-left:14px;box-shadow:3px 3px #ddd6c9}.search-shortcut{display:none}.hero-stats{padding:15px 15px 15px 31px;box-shadow:5px 5px #ddd6c9}.hero-stats:before{left:20px}.hero-stat{min-height:94px;padding:14px 11px}.hero-stat .num{font-size:26px}.theme-section{padding-top:58px}.theme-head{gap:8px}.theme-title{font-size:27px}.theme-meta{padding-left:43px}.chap-card{min-height:270px;padding:26px 23px 22px}.bottom-band{margin-top:72px;padding:54px 0 62px}.bottom-band h3{font-size:28px}.band-art{display:none}}