:root{--bg-canvas:#000;--bg-surface:#0a0a0c;--bg-elevated:#121216;--bg-subtle:#1a1a20;--bg-overlay:#000000db;--text-primary:#fff;--text-secondary:#d4d4d8;--text-muted:#a1a1aa;--text-tertiary:#71717a;--text-inverse:#000;--border-subtle:#ffffff1a;--border-medium:#ffffff2e;--border-strong:#ffffff52;--border-glass:#ffffff24;--accent-brand:#ff6129;--accent-brand-hover:#fc3b00;--accent-brand-subtle:#ff612926;--accent-brand-glow:#fc3b0061;--accent-brand-text:#ff7145;--accent-secondary:#ff7145;--accent-secondary-subtle:#ff714524;--accent-tertiary:#fc3b00;--accent-tertiary-subtle:#fc3b0026;--status-success:#10b981;--status-warn:#fbbf24;--status-error:#f87171;--status-error-subtle:#f8717124;--shadow-subtle:0 1px 2px 0 #0009;--shadow-card:0 1px 3px 0 #0009, 0 1px 2px -1px #00000080;--shadow-elevated:0 4px 8px -1px #000c, 0 2px 4px -2px #0009;--shadow-modal:0 20px 25px -5px #000000e6, 0 8px 10px -6px #000000b3;--shadow-glow:0 0 32px -4px #fc3b006b;--font-sans:"Helvetica Neue", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;--font-mono:"JetBrains Mono", Consolas, SFMono-Regular, Menlo, Monaco, monospace;--font-display:"Helvetica Neue", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--sp-1:4px;--sp-2:8px;--sp-3:12px;--sp-4:16px;--sp-5:20px;--sp-6:24px;--sp-8:32px;--sp-10:40px;--sp-12:48px;--sp-16:64px;--sp-20:80px;--sp-24:96px;--r-none:0;--r-xs:4px;--r-sm:6px;--r-md:10px;--r-lg:14px;--r-xl:20px;--r-2xl:28px;--r-full:9999px;--trans-fast:.15s cubic-bezier(.16, 1, .3, 1);--trans-base:.22s cubic-bezier(.16, 1, .3, 1);--trans-smooth:.32s cubic-bezier(.16, 1, .3, 1);--container-max:1280px;--container-prose:720px;--container-gutter:24px;--header-height:68px;--canvas:var(--bg-surface);--canvas-soft:var(--bg-elevated);--canvas-tint:var(--bg-subtle);--canvas-warm:var(--bg-subtle);--ink:var(--text-primary);--ink-deep:var(--text-primary);--link:var(--accent-brand);--hairline:var(--border-subtle);--divider:var(--border-subtle);--field-border:var(--border-medium);--primary:var(--accent-brand);--primary-pressed:var(--accent-brand-hover);--on-primary:var(--text-inverse);--error:var(--status-error);--disabled-ink:var(--text-tertiary);--focus:var(--accent-brand);--accent-gold:var(--accent-secondary);--accent-gold-soft:var(--accent-secondary-subtle);--band-teal:var(--bg-subtle);--band-forest:var(--bg-elevated);--sp-xs:var(--sp-2);--sp-sm:var(--sp-3);--sp-md:var(--sp-4);--sp-lg:var(--sp-5);--sp-xl:var(--sp-6);--sp-xxl:var(--sp-8);--sp-xxxl:var(--sp-12);--sp-section:var(--sp-16);--sp-gutter:var(--sp-20)}[data-theme=dark]{--bg-canvas:#000;--bg-surface:#0a0a0c;--bg-elevated:#121216;--bg-subtle:#1a1a20;--bg-overlay:#000000db;--text-primary:#fff;--text-secondary:#d4d4d8;--text-muted:#a1a1aa;--text-tertiary:#71717a;--text-inverse:#000;--border-subtle:#ffffff1a;--border-medium:#ffffff2e;--border-strong:#ffffff52;--border-glass:#ffffff24;--accent-brand:#ff6129;--accent-brand-hover:#fc3b00;--accent-brand-subtle:#ff612926;--accent-brand-glow:#fc3b0061;--accent-brand-text:#ff7145;--accent-secondary:#ff7145;--accent-secondary-subtle:#ff714524;--accent-tertiary:#fc3b00;--accent-tertiary-subtle:#fc3b0026;--status-success:#10b981;--status-warn:#fbbf24;--status-error:#f87171;--status-error-subtle:#f8717124;--shadow-subtle:0 1px 2px 0 #0009;--shadow-card:0 1px 3px 0 #0009, 0 1px 2px -1px #00000080;--shadow-elevated:0 4px 8px -1px #000c, 0 2px 4px -2px #0009;--shadow-modal:0 20px 25px -5px #000000e6, 0 8px 10px -6px #000000b3;--shadow-glow:0 0 32px -4px #fc3b006b;--canvas:var(--bg-surface);--canvas-soft:var(--bg-elevated);--canvas-tint:var(--bg-subtle);--canvas-warm:var(--bg-subtle);--ink:var(--text-primary);--ink-deep:var(--text-primary);--hairline:var(--border-subtle);--divider:var(--border-subtle);--field-border:var(--border-medium);--disabled-ink:var(--text-tertiary);--band-teal:var(--bg-subtle);--band-forest:var(--bg-elevated)}@media (prefers-color-scheme:dark){:root:not([data-theme=light]){--bg-canvas:#000;--bg-surface:#0a0a0c;--bg-elevated:#121216;--bg-subtle:#1a1a20;--bg-overlay:#000000db;--text-primary:#fff;--text-secondary:#d4d4d8;--text-muted:#a1a1aa;--text-tertiary:#71717a;--text-inverse:#000;--border-subtle:#ffffff1a;--border-medium:#ffffff2e;--border-strong:#ffffff52;--border-glass:#ffffff24;--accent-brand:#ff6129;--accent-brand-hover:#fc3b00;--accent-brand-subtle:#ff612926;--accent-brand-glow:#fc3b0061;--accent-brand-text:#ff7145;--accent-secondary:#ff7145;--accent-secondary-subtle:#ff714524;--accent-tertiary:#fc3b00;--accent-tertiary-subtle:#fc3b0026;--status-success:#10b981;--status-warn:#fbbf24;--status-error:#f87171;--status-error-subtle:#f8717124;--shadow-subtle:0 1px 2px 0 #0009;--shadow-card:0 1px 3px 0 #0009, 0 1px 2px -1px #00000080;--shadow-elevated:0 4px 8px -1px #000c, 0 2px 4px -2px #0009;--shadow-modal:0 20px 25px -5px #000000e6, 0 8px 10px -6px #000000b3;--shadow-glow:0 0 32px -4px #fc3b006b;--canvas:var(--bg-surface);--canvas-soft:var(--bg-elevated);--canvas-tint:var(--bg-subtle);--canvas-warm:var(--bg-subtle);--ink:var(--text-primary);--ink-deep:var(--text-primary);--hairline:var(--border-subtle);--divider:var(--border-subtle);--field-border:var(--border-medium);--disabled-ink:var(--text-tertiary);--band-teal:var(--bg-subtle);--band-forest:var(--bg-elevated)}}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}}@font-face{font-family:Inter;font-style:normal;font-weight:100 900;font-display:swap;src:url(/_astro/inter-latin.Dx4kXJAl.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:Inter;font-style:normal;font-weight:100 900;font-display:swap;src:url(/_astro/inter-latin-ext.DO1Apj_S.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}:root{--brand-mark:var(--accent-brand);--primary:var(--accent-brand);--primary-pressed:var(--accent-brand-hover);--on-primary:var(--text-inverse);--accent-gold:var(--accent-secondary);--accent-gold-soft:var(--accent-secondary-subtle);--canvas:var(--bg-canvas);--canvas-soft:var(--bg-surface);--canvas-tint:var(--bg-elevated);--canvas-warm:var(--bg-subtle);--hairline:var(--border-subtle);--divider:var(--border-subtle);--field-border:var(--border-medium);--ink-deep:var(--text-primary);--ink:var(--text-primary);--link:var(--accent-brand);--focus:var(--accent-brand);--error:var(--status-error);--disabled-ink:var(--text-tertiary);--band-teal:var(--bg-subtle);--band-forest:var(--bg-elevated);--font-sans:"Helvetica Neue", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--font-display:"Helvetica Neue", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--font-mono:"JetBrains Mono", Consolas, ui-monospace, SFMono-Regular, Menlo, monospace;--sp-xs:10px;--sp-sm:12px;--sp-md:16px;--sp-lg:18px;--sp-xl:20px;--sp-xxl:24px;--sp-xxxl:32px;--sp-section:48px;--sp-gutter:72px;--r-none:0;--r-xs:4px;--r-sm:6px;--r-md:8px;--r-full:9999px;--container:1744px;--context:1600px;--min-container:272px;--masthead-h:85px;--subnav-h:64px}:lang(ja){--font-sans:"Inter", "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic UI", "Yu Gothic", "Noto Sans JP", Meiryo, system-ui, sans-serif;--font-display:"Hiragino Mincho ProN", "Yu Mincho", "Noto Serif JP", "Times New Roman", serif}:lang(ko){--font-sans:"Inter", "Apple SD Gothic Neo", "Malgun Gothic", "Noto Sans KR", system-ui, sans-serif;--font-display:"Nanum Myeongjo", "Noto Serif KR", "Apple SD Gothic Neo", Georgia, serif}:lang(zh){--font-sans:"Inter", "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;--font-display:"Songti SC", SimSun, "Noto Serif SC", "Times New Roman", serif}:lang(ru){--font-sans:"Inter", "PT Sans", "Segoe UI", Roboto, system-ui, sans-serif;--font-display:Georgia, "PT Serif", "Times New Roman", serif}:lang(tr){--font-sans:"Inter", "Segoe UI", Tahoma, Roboto, system-ui, sans-serif;--font-display:Georgia, "Times New Roman", serif}*,:before,:after{box-sizing:border-box}html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}body{background:var(--canvas);color:var(--ink);font:400 16px/1.4 var(--font-sans);letter-spacing:0;-webkit-font-smoothing:antialiased;text-rendering:optimizelegibility;margin:0}h1,h2,h3,h4,p,figure,blockquote{margin:0}ul,ol{margin:0;padding:0}img{max-width:100%;height:auto}[hidden]{display:none!important}[id]{scroll-margin-top:calc(var(--subnav-h) + 24px)}button,input,textarea,select{font:inherit;letter-spacing:0}.display-xl{font-family:var(--font-display);letter-spacing:0;font-size:56px;font-weight:400;line-height:67.2px}.display-lg{font-family:var(--font-display);letter-spacing:0;font-size:40px;font-weight:400;line-height:48px}.display-md{font-family:var(--font-display);letter-spacing:0;font-size:36px;font-weight:400;line-height:43.2px}.heading-xl{font-family:var(--font-sans);letter-spacing:0;font-size:28px;font-weight:800;line-height:33.6px}.heading-lg{font-family:var(--font-sans);letter-spacing:0;font-size:24px;font-weight:800;line-height:28.8px}.heading-md{font-family:var(--font-sans);letter-spacing:0;font-size:20px;font-weight:800;line-height:24px}.heading-sm{font-family:var(--font-sans);letter-spacing:0;font-size:18px;font-weight:800;line-height:21.6px}.lead{font-family:var(--font-sans);letter-spacing:0;font-size:24px;font-weight:400;line-height:33.6px}.body{font-family:var(--font-sans);letter-spacing:0;font-size:16px;font-weight:400;line-height:22.4px}.body-loose{font-family:var(--font-sans);letter-spacing:0;font-size:16px;font-weight:350;line-height:24px}.body-strong{font-family:var(--font-sans);letter-spacing:0;font-size:16px;font-weight:700;line-height:22.4px}.label{font-family:var(--font-sans);letter-spacing:0;font-size:14px;font-weight:500;line-height:16.8px}.label-strong{font-family:var(--font-sans);letter-spacing:0;font-size:14px;font-weight:600;line-height:20px}.caption{font-family:var(--font-sans);letter-spacing:0;font-size:12px;font-weight:400;line-height:20px}a{color:var(--link);text-decoration:none}.link-inline{color:var(--link);font-family:var(--font-sans);letter-spacing:0;font-size:16px;font-weight:400;line-height:22.4px}.link-inline--inverse{color:var(--on-primary)}:focus-visible{outline:2px solid var(--focus);outline-offset:2px}.band--forest :focus-visible,.subnav :focus-visible,.masthead :focus-visible{outline-color:var(--focus);box-shadow:0 0 0 2px #fff9}.container{width:100%;max-width:var(--container);padding-left:var(--sp-gutter);padding-right:var(--sp-gutter);margin:0 auto}.container--context{max-width:var(--context)}.band{width:100%;padding:var(--sp-section) 0;border-radius:var(--r-none)}.band--white{background:var(--canvas)}.band--soft{background:var(--canvas-soft)}.band--tint{background:var(--canvas-tint)}.band--warm{background:var(--canvas-warm)}.band--teal{background:var(--band-teal)}.band--forest{background:var(--band-forest);color:var(--on-primary)}.band__head{max-width:780px;margin-bottom:var(--sp-xxxl)}.band__head .lead{margin-top:var(--sp-lg);color:var(--ink)}.band--forest .band__head .lead,.band--forest .display-lg,.band--forest .display-md{color:var(--on-primary)}.rule{background:var(--accent-gold);width:40px;height:4px;margin:var(--sp-xl) 0;border:0;display:block}.masthead{color:var(--text-primary);background:0 0;align-items:center;display:flex}.masthead__inner{align-items:center;gap:var(--sp-xxl);display:flex}.wordmark{font-family:var(--font-sans);letter-spacing:0;color:var(--brand-mark);font-size:24px;font-weight:800;line-height:28.8px}.masthead__tag{font-family:var(--font-sans);color:var(--ink);padding-left:var(--sp-md);border-left:1px solid var(--hairline);font-size:12px;font-weight:400;line-height:20px}.masthead__utils{align-items:center;gap:var(--sp-md);margin-left:auto;display:flex}.icon-link{width:32px;height:32px;color:var(--ink);justify-content:center;align-items:center;display:inline-flex}.icon-link svg{width:20px;height:20px}.lang-switcher{align-items:center;display:inline-flex}.lang-switcher__label{clip:rect(0 0 0 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.lang-switcher__select{-webkit-appearance:none;appearance:none;border:1px solid var(--hairline);border-radius:var(--r-xs);background-color:var(--canvas);max-width:156px;color:var(--ink);font:500 12px/1.4 var(--font-sans);text-overflow:ellipsis;cursor:pointer;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 8'%3E%3Cpath d='M1 1.5 6 6.5l5-5' fill='none' stroke='%23211e1c' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");background-position:right 8px center;background-repeat:no-repeat;background-size:10px 7px;padding:7px 26px 7px 9px}.lang-switcher__select:hover{border-color:var(--field-border)}.lang-switcher__select:focus-visible{outline:2px solid var(--focus);outline-offset:2px}.subnav{color:var(--text-primary);background:0 0;align-items:center;display:flex}.subnav__inner{align-items:stretch;gap:var(--sp-xxxl);scrollbar-width:none;display:flex;overflow-x:auto}.subnav__inner::-webkit-scrollbar{display:none}.subnav a{white-space:nowrap;font-family:var(--font-sans);color:var(--on-primary);align-items:center;padding:0 4px;font-size:16px;font-weight:400;line-height:22.4px;display:inline-flex;position:relative}.subnav a:hover{text-decoration:underline}.subnav a[aria-current=true]:after,.subnav a[aria-current=page]:after{content:"";background:var(--accent-gold-soft);width:67px;height:5px;position:absolute;bottom:0;left:50%;transform:translate(-50%)}.btn{justify-content:center;align-items:center;gap:var(--sp-xs);border-radius:var(--r-xs);font-family:var(--font-sans);letter-spacing:0;cursor:pointer;color:var(--ink);background:0 0;border:1px solid #0000;padding:10px 16px;font-size:14px;font-weight:500;line-height:16.8px;text-decoration:none;display:inline-flex}.btn--primary{background:var(--primary);color:var(--on-primary)}.btn--primary:hover,.btn--primary:active{background:var(--primary-pressed)}.btn--secondary{border-color:var(--ink);color:var(--ink)}.btn--secondary:hover{background:#1615130f}.btn--tertiary{color:var(--ink);background:#16151314}.btn--tertiary:hover{background:#16151324}.btn--primary-inverse{background:var(--canvas);color:var(--ink)}.btn--primary-inverse:hover{background:var(--canvas-soft)}.btn--secondary-inverse{border-color:var(--on-primary);color:var(--on-primary)}.btn--secondary-inverse:hover{background:#ffffff1f}.btn[disabled],.btn[aria-disabled=true]{background:var(--canvas-soft);color:var(--disabled-ink);border-color:var(--hairline);cursor:not-allowed}.btn-row{gap:var(--sp-md);flex-wrap:wrap;display:flex}.hero{background:var(--canvas-warm);padding:var(--sp-section) 0 calc(var(--sp-section) + 40px);clip-path:polygon(0 0,100% 0,100% calc(100% - 40px),0 100%);position:relative;overflow:hidden}.hero__pattern{width:100%;height:100%;color:var(--ink);opacity:.06;pointer-events:none;position:absolute;inset:0}.hero__inner{max-width:940px;position:relative}.hero__kicker{font-family:var(--font-sans);color:var(--ink);margin-bottom:var(--sp-lg);font-size:14px;font-weight:500;line-height:16.8px}.hero .lead{max-width:720px}.hero .btn-row{margin-top:var(--sp-xxxl)}.tool{gap:var(--sp-xxxl);grid-template-columns:400px minmax(0,1fr);align-items:start;display:grid}.panel{background:var(--canvas-warm);border-radius:var(--r-md);padding:var(--sp-xxl)}.controls h3{margin-bottom:var(--sp-lg)}.controls h3:not(:first-child){margin-top:var(--sp-xxl)}.field{border:1px solid var(--field-border);border-radius:var(--r-sm);background:var(--canvas);width:100%;color:var(--ink);font-family:var(--font-sans);padding:12px 18px;font-size:16px;line-height:22.4px}.field::placeholder{color:var(--disabled-ink)}.field:focus-visible{outline:2px solid var(--focus);outline-offset:2px}.field--search{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23aea8a2' stroke-width='2' stroke-linecap='round'%3E%3Ccircle cx='11' cy='11' r='7'/%3E%3Cpath d='m20 20-3.5-3.5'/%3E%3C/svg%3E");background-position:18px;background-repeat:no-repeat;background-size:18px;padding-left:48px}textarea.field{resize:vertical;min-height:240px;font-family:var(--font-mono);font-size:13px;line-height:1.5}.row{gap:var(--sp-xs);align-items:stretch;display:flex}.row .field{flex:1;min-width:0}.hint{font-family:var(--font-sans);color:var(--ink);opacity:.72;margin-top:var(--sp-sm);font-size:12px;font-weight:400;line-height:20px}.field-file{font-family:var(--font-sans);color:var(--ink);width:100%;font-size:13px;line-height:1.4}.field-file::file-selector-button{margin-right:var(--sp-sm);border:1px solid var(--ink);border-radius:var(--r-xs);color:var(--ink);font-family:var(--font-sans);cursor:pointer;background:0 0;padding:6px 12px;font-size:13px;font-weight:500}.theme-grid{gap:var(--sp-xs);grid-template-columns:repeat(2,minmax(0,1fr));display:grid}.theme-tile{align-items:center;gap:var(--sp-xs);padding:var(--sp-sm);border:1px solid var(--hairline);border-radius:var(--r-md);background:var(--canvas);font-family:var(--font-sans);color:var(--ink);cursor:pointer;font-size:14px;font-weight:600;line-height:20px;display:flex}.theme-tile:hover{border-color:var(--field-border)}.theme-tile:has(input:checked){border-color:var(--ink)}.theme-tile input{accent-color:var(--primary);margin:0}.check{gap:var(--sp-xs);font-family:var(--font-sans);color:var(--ink);align-items:center;font-size:14px;font-weight:500;line-height:20px;display:flex}.check input{accent-color:var(--primary);width:16px;height:16px;margin:0}.status{font-family:var(--font-sans);color:var(--ink);min-height:20px;margin:var(--sp-lg) 0 0;font-size:14px;font-weight:500;line-height:20px}.status.error{color:var(--error)}.status:empty{margin:0}.meta{font-family:var(--font-sans);color:var(--ink);opacity:.72;word-break:break-all;font-size:12px;font-weight:400;line-height:20px}.warn{font-family:var(--font-sans);color:var(--ink);border-left:2px solid var(--ink);padding:2px 0 2px var(--sp-md);margin:var(--sp-md) 0 0;font-size:13px;font-weight:400;line-height:20px}.preview-wrap,.tool-preview,.book-preview-panel{flex-direction:column;min-height:0;display:flex}.preview-head{justify-content:space-between;align-items:center;gap:var(--sp-md);margin-bottom:var(--sp-md);display:flex}.preview-head__title{font-family:var(--font-sans);color:var(--ink);font-size:18px;font-weight:800;line-height:21.6px}.preview-scroll-container,.book-preview-scroll-container{overscroll-behavior-y:contain;-webkit-overflow-scrolling:touch;border-radius:var(--r-md);background:var(--bg-surface);border:1px solid var(--border-subtle);height:clamp(520px,70vh,760px);min-height:0;max-height:760px;overflow:hidden auto}.preview-scroll-container::-webkit-scrollbar,.book-preview-scroll-container::-webkit-scrollbar{width:8px}.preview-scroll-container::-webkit-scrollbar-track,.book-preview-scroll-container::-webkit-scrollbar-track{border-radius:var(--r-full);background:#ffffff0a}.preview-scroll-container::-webkit-scrollbar-thumb,.book-preview-scroll-container::-webkit-scrollbar-thumb{border-radius:var(--r-full);background:#ffffff38}.preview-scroll-container::-webkit-scrollbar-thumb:hover,.book-preview-scroll-container::-webkit-scrollbar-thumb:hover{background:#ffffff61}.sheet{color:#171717;border-radius:var(--r-md);box-sizing:border-box;background:#fff;border:none;min-height:100%;padding:40px 44px}.sheet img{max-width:100%}.sheet img.broken{opacity:.45;outline:1px dashed var(--error);outline-offset:2px}.channels{gap:var(--sp-xxxl);grid-template-columns:repeat(3,minmax(0,1fr));display:grid}.channel{background:var(--canvas);border-radius:var(--r-md);padding:var(--sp-xxl)}.channel+.channel{border-left:2px solid var(--divider);border-radius:0 var(--r-md) var(--r-md) 0}.channel__icon{width:32px;height:32px;color:var(--ink);margin-bottom:var(--sp-md);display:block}.channel__icon svg{width:100%;height:100%}.channel h3{margin-bottom:var(--sp-lg)}.channel p{margin-bottom:var(--sp-md)}.channel__step{font-family:var(--font-sans);color:var(--ink);opacity:.6;margin-bottom:var(--sp-xs);font-size:12px;font-weight:600;line-height:20px;display:block}.feature-grid{gap:var(--sp-xxxl) var(--sp-gutter);grid-template-columns:repeat(2,minmax(0,1fr));display:grid}.feature h3{margin-bottom:var(--sp-lg)}.feature ul{list-style:none}.feature li{padding-left:var(--sp-xl);margin-top:var(--sp-xs);font-family:var(--font-sans);color:var(--ink);font-size:16px;font-weight:350;line-height:24px;position:relative}.feature li:before{content:"";background:var(--ink);opacity:.55;width:10px;height:1px;position:absolute;top:11px;left:0}.feature strong{font-weight:700}.feature code,.channel code{font-family:var(--font-mono);font-size:.92em}.statement{align-items:baseline;gap:var(--sp-xs) var(--sp-xl);flex-wrap:wrap;display:flex}.statement__lead{font-family:var(--font-display);color:var(--ink);font-size:36px;font-weight:400;line-height:43.2px}.statement__body{font-family:var(--font-sans);color:var(--ink);max-width:620px;font-size:16px;font-weight:350;line-height:24px}.theme-cards{gap:var(--sp-xxxl);grid-template-columns:repeat(4,minmax(0,1fr));display:grid}.theme-card{background:var(--canvas);border-radius:var(--r-md);padding:var(--sp-xxl)}.theme-card h3,.theme-card p{margin-bottom:var(--sp-lg)}.swatch{border:1px solid var(--hairline);border-radius:var(--r-sm);background:var(--canvas);height:108px;padding:12px;overflow:hidden}.swatch__title{margin-bottom:8px;font-size:12px;font-weight:800;line-height:16px}.swatch__line{opacity:.18;background:currentColor;height:4px;margin-bottom:6px}.swatch__line--short{width:62%}.swatch__code{border-radius:3px;height:22px;margin-top:10px}.swatch--clean{color:#1a1d21}.swatch--clean .swatch__code{background:#f3f4f6}.swatch--business{color:#17202b;font-family:Georgia,Times New Roman,serif}.swatch--business .swatch__code{background:#101c30}.swatch--academic{color:#111;font-family:Georgia,Times New Roman,serif}.swatch--academic .swatch__code{background:#f7f5ef;border:1px solid #ddd6c3}.swatch--dark{color:#e6ebf2;background:#151a23}.swatch--dark .swatch__code{background:#0b0f16}.band--forest .band__head{max-width:820px}.link-columns{gap:var(--sp-xxxl);padding-top:var(--sp-xxxl);border-top:1px solid #ffffff38;grid-template-columns:repeat(4,minmax(0,1fr));display:grid}.link-columns h3{color:var(--on-primary);margin-bottom:var(--sp-lg)}.link-columns ul{list-style:none}.link-columns li{margin-bottom:var(--sp-xs)}.link-columns a{color:var(--on-primary);font-family:var(--font-sans);font-size:16px;font-weight:350;line-height:24px}.link-columns a:hover{text-decoration:underline}.footer{background:var(--canvas);color:var(--ink);padding:var(--sp-xxxl) 0}.footer__links{gap:var(--sp-xs) var(--sp-xxl);padding-bottom:var(--sp-md);border-bottom:1px solid var(--hairline);flex-wrap:wrap;justify-content:center;display:flex}.footer__links a{color:var(--ink);font-family:var(--font-sans);font-size:12px;font-weight:400;line-height:20px}.footer__links a:hover{text-decoration:underline}.footer__social{justify-content:center;align-items:center;gap:var(--sp-xl);padding-top:var(--sp-md);display:flex}.footer__social a{width:24px;height:24px;color:var(--ink);justify-content:center;align-items:center;display:inline-flex}.footer__social svg{width:18px;height:18px}.footer__credit{text-align:center;color:var(--ink);opacity:.72;margin-top:var(--sp-md)}.doc{overflow-wrap:anywhere;color:inherit;font-size:15px;line-height:1.65}.doc h1,.doc h2,.doc h3,.doc h4,.doc h5,.doc h6{color:inherit;margin-top:1.4em;margin-bottom:.6em;font-weight:700;line-height:1.25}.doc h1:first-child,.doc h2:first-child,.doc h3:first-child{margin-top:0}.doc h1{border-bottom:1px solid;padding-bottom:.3em;font-size:2em}.doc h2{border-bottom:1px solid;padding-bottom:.3em;font-size:1.5em}.doc h3{font-size:1.25em}.doc h4{font-size:1.1em}.doc h5{font-size:1em}.doc h6{font-size:.9em}.doc p,.doc ul,.doc ol,.doc dl{color:inherit;margin:.85em 0}.doc ul,.doc ol{padding-left:1.5em}.doc li{margin:.3em 0}.doc hr{opacity:.2;background-color:currentColor;border:0;height:2px;margin:24px 0;padding:0}.doc table{border-collapse:collapse;width:100%;margin:1.2em 0;display:block;overflow-x:auto}.doc th,.doc td{text-align:left;border:1px solid;padding:8px 12px}.doc pre{font:13px/1.5 var(--font-mono);border-radius:8px;margin:1em 0;padding:14px 16px;overflow-x:auto}.doc code{font:13px/1.5 var(--font-mono)}.doc :not(pre)>code{border-radius:4px;padding:2px 6px}.doc blockquote{border-left:4px solid;border-radius:0 6px 6px 0;margin:1.2em 0;padding:8px 16px}.doc ul.contains-task-list{padding-left:4px;list-style:none}.doc .task-list-item input[type=checkbox]{vertical-align:middle;margin-right:.5em}.toc{border:1px solid;border-radius:8px;margin-bottom:24px;padding:12px 18px}.toc-title{margin:0 0 8px;font-weight:700}.toc ul{margin:0;padding-left:18px}.toc-l2{margin-left:0}.toc-l3{margin-left:12px}.toc-l4{margin-left:24px}.theme-clean{color:#1e293b;font-family:var(--font-sans);background:#fff}.theme-clean .doc h1,.theme-clean .doc h2,.theme-clean .doc h3,.theme-clean .doc h4,.theme-clean .doc h5,.theme-clean .doc h6{color:#0f172a}.theme-clean .doc h1,.theme-clean .doc h2{border-bottom:1px solid #e2e8f0}.theme-clean .doc a{color:#0284c7;text-underline-offset:2px;text-decoration:underline}.theme-clean .doc a:hover{color:#0369a1}.theme-clean .doc th,.theme-clean .doc td{color:#1e293b;border:1px solid #e2e8f0}.theme-clean .doc th{color:#0f172a;background:#f8fafc;font-weight:600}.theme-clean .doc tr:nth-child(2n) td{background:#fcfdfe}.theme-clean .doc pre{color:#0f172a;background:#f8fafc;border:1px solid #e2e8f0}.theme-clean .doc :not(pre)>code{color:#0f172a;background:#f1f5f9;border:1px solid #e2e8f0}.theme-clean .doc blockquote{color:#475569;background:#f8fafc;border-left-color:#94a3b8}.theme-clean .toc{color:#1e293b;background:#f8fafc;border:1px solid #e2e8f0}.theme-clean .toc-title{color:#0f172a}.theme-clean .toc a{color:#0284c7}.theme-business{color:#1e293b;background:#fff;font-family:Georgia,Times New Roman,serif}.theme-business .doc h1,.theme-business .doc h2{color:#1e3a5f;border-bottom:2px solid #1e3a5f}.theme-business .doc h3,.theme-business .doc h4,.theme-business .doc h5,.theme-business .doc h6{color:#1e3a5f}.theme-business .doc a{color:#1d4ed8;text-underline-offset:2px;text-decoration:underline}.theme-business .doc th,.theme-business .doc td{border:1px solid #cbd5e1}.theme-business .doc th{color:#1e3a5f;background:#eaf0f8;font-weight:700}.theme-business .doc tr:nth-child(2n) td{background:#f8fafc}.theme-business .doc pre{color:#e8eef7;background:#101c30;border:1px solid #1e3a5f}.theme-business .doc :not(pre)>code{color:#1e3a5f;background:#eaf0f8;border:1px solid #cbd5e1}.theme-business .doc blockquote{color:#334155;background:#f1f5f9;border-left-color:#1e3a5f}.theme-business .toc{background:#f8fafc;border:1px solid #cbd5e1}.theme-business .toc-title{color:#1e3a5f}.theme-academic{color:#111;text-align:justify;background:#faf9f6;font-family:Georgia,Times New Roman,serif}.theme-academic .doc h1,.theme-academic .doc h2,.theme-academic .doc h3,.theme-academic .doc h4,.theme-academic .doc h5,.theme-academic .doc h6{color:#111;text-align:left}.theme-academic .doc h1,.theme-academic .doc h2{border-bottom:1px solid #ddd6c3}.theme-academic .doc a{color:#0f172a;text-underline-offset:2px;text-decoration:underline}.theme-academic .doc th,.theme-academic .doc td{border:1px solid #ddd6c3}.theme-academic .doc th{color:#111;background:#f3efe6;font-weight:700}.theme-academic .doc pre{color:#111;text-align:left;background:#f7f5ef;border:1px solid #ddd6c3}.theme-academic .doc :not(pre)>code{color:#111;background:#f1ecdd;border:1px solid #ddd6c3}.theme-academic .doc blockquote{color:#38342e;text-align:left;background:#f5f2e9;border-left-color:#8c8273}.theme-academic .toc{text-align:left;background:#f7f5ef;border:1px solid #ddd6c3}.theme-academic .toc-title{color:#111}.theme-dark{color:#e6ebf2;background:#151a23;border-color:#2b3444}.theme-dark .doc h1,.theme-dark .doc h2,.theme-dark .doc h3,.theme-dark .doc h4,.theme-dark .doc h5,.theme-dark .doc h6{color:#fff}.theme-dark .doc h1,.theme-dark .doc h2{border-bottom:1px solid #2b3444}.theme-dark .doc a{color:#8ab4ff;text-underline-offset:2px;text-decoration:underline}.theme-dark .doc th,.theme-dark .doc td{color:#e6ebf2;border-color:#2b3444}.theme-dark .doc th{color:#fff;background:#1e2634;font-weight:600}.theme-dark .doc tr:nth-child(2n) td{background:#1e263480}.theme-dark .doc pre{color:#dbe6f5;background:#0b0f16;border:1px solid #2b3444}.theme-dark .doc :not(pre)>code{color:#e6ebf2;background:#232c3d;border:1px solid #2b3444}.theme-dark .doc blockquote{color:#9aa7bb;background:#1e263466;border-left-color:#3b82f6}.theme-dark .toc{color:#e6ebf2;background:#10141d;border-color:#2b3444}.theme-dark .toc-title{color:#fff}.book-tool{gap:var(--sp-xxxl);grid-template-columns:440px minmax(0,1fr);align-items:start;display:grid}.book-row-actions{margin-top:var(--sp-sm)}.book-row-actions:not(:has(button:not([hidden]))){display:none}.book-warnings{margin-top:var(--sp-xl);padding:var(--sp-md);background:var(--canvas-tint);border-left:3px solid var(--accent-gold);border-radius:0 var(--r-xs) var(--r-xs) 0}.book-warnings__title{font-family:var(--font-sans);color:var(--ink);font-size:13px;font-weight:700;line-height:20px}.book-warnings ul{margin-top:var(--sp-xs);list-style:none}.book-warnings li{font-family:var(--font-sans);color:var(--ink);opacity:.8;padding-left:14px;font-size:12px;line-height:18px;position:relative}.book-warnings li+li{margin-top:4px}.book-warnings li:before{content:"";background:var(--ink);opacity:.4;border-radius:50%;width:5px;height:5px;position:absolute;top:7px;left:0}.book-workspace{margin-top:var(--sp-xxl);padding-top:var(--sp-xl);border-top:1px solid var(--divider)}.book-workspace__head{justify-content:space-between;align-items:baseline;gap:4px var(--sp-md);flex-wrap:wrap;display:flex}.book-toolbar,.book-search,.book-tree-wrap{margin-top:var(--sp-sm)}#book-tree{border:1px solid var(--hairline);border-radius:var(--r-sm);background:var(--canvas);max-height:440px;padding:6px;overflow:auto}#book-tree ul{list-style:none}.book-tree__row{align-items:center;gap:var(--sp-xs);border-radius:var(--r-xs);min-height:30px;padding:2px 6px;display:flex}.book-tree__row:hover{background:var(--canvas-tint)}.book-tree__checkbox{width:15px;height:15px;accent-color:var(--primary);flex:none;margin:0}.book-tree__toggle{min-width:0;color:inherit;font-family:var(--font-sans);text-align:left;cursor:pointer;background:0 0;border:0;flex:1;align-items:center;gap:6px;padding:4px 0;font-size:13px;font-weight:600;line-height:18px;display:flex}.book-tree__chevron{width:12px;color:var(--ink);opacity:.55;flex:none;font-size:15px;line-height:1;transition:transform .12s}.book-tree__toggle[aria-expanded=true] .book-tree__chevron{transform:rotate(90deg)}.book-tree__name{text-overflow:ellipsis;white-space:nowrap;overflow:hidden}.book-tree__count{min-width:18px;color:var(--ink);opacity:.5;font-family:var(--font-sans);text-align:right;flex:none;font-size:11px}.book-tree__children{border-left:1px solid var(--divider);margin-left:20px;padding-left:6px}.book-tree__file-btn{min-width:0;color:inherit;font-family:var(--font-sans);text-align:left;cursor:pointer;background:0 0;border:0;flex:1;align-items:baseline;gap:6px;padding:4px 0;font-size:13px;line-height:18px;display:flex}.book-tree__file-btn:hover .book-tree__name{text-decoration:underline}.book-tree__dir{color:var(--ink);opacity:.5;text-overflow:ellipsis;white-space:nowrap;font-size:11px;overflow:hidden}.book-tree__size{color:var(--ink);opacity:.5;font-family:var(--font-sans);font-variant-numeric:tabular-nums;flex:none;font-size:11px}.book-empty{margin-top:var(--sp-xs)}.book-field{margin-top:var(--sp-md);display:block}.book-field .label{margin-bottom:6px;display:block}.book-optional{opacity:.6;font-weight:400}.book-checks{gap:var(--sp-sm) var(--sp-xl);margin-top:var(--sp-md);flex-wrap:wrap;display:flex}.book-chapters-hint{margin-top:4px}.book-chapters{margin-top:var(--sp-sm);flex-direction:column;gap:6px;list-style:none;display:flex}.book-chapter-row{align-items:center;gap:var(--sp-xs);border:1px solid var(--hairline);border-radius:var(--r-xs);background:var(--canvas);padding:5px 6px 5px 8px;display:flex}.book-chapter-row__number{width:20px;color:var(--ink);opacity:.5;font-family:var(--font-sans);font-variant-numeric:tabular-nums;text-align:center;flex:none;font-size:12px;font-weight:700}.book-chapter-row__path{overflow-wrap:anywhere;min-width:0;font-family:var(--font-mono);color:var(--ink);flex:1;font-size:12px;line-height:18px}.book-chapter-row__controls{flex:none;gap:2px;display:flex}.book-chapter-row__btn{border-radius:var(--r-xs);background:var(--canvas-tint);width:26px;height:26px;color:var(--ink);font-family:var(--font-sans);cursor:pointer;border:1px solid #0000;justify-content:center;align-items:center;padding:0;font-size:14px;line-height:1;display:inline-flex}.book-chapter-row__btn:hover:not([disabled]){background:var(--canvas-warm);border-color:var(--hairline)}.book-chapter-row__btn[disabled]{opacity:.35;cursor:not-allowed}.book-build-row{margin-top:var(--sp-xl)}.book-failures{margin-top:var(--sp-md);padding:var(--sp-md);border-radius:var(--r-xs);background:#d63b250d;border:1px solid #d63b2566}.book-failures__title{color:var(--error);font-family:var(--font-sans);font-size:13px;font-weight:700;line-height:20px}.book-failures ul{margin-top:var(--sp-xs);list-style:none}.book-failures__item{border-top:1px solid #d63b252e;grid-template-columns:minmax(0,1fr);gap:2px;padding:6px 0;display:grid}.book-failures__item:first-child{border-top:0}.book-failures__path{overflow-wrap:anywhere;font-family:var(--font-mono);color:var(--ink);font-size:12px}.book-failures__message{font-family:var(--font-sans);color:var(--ink);opacity:.8;font-size:12px;line-height:18px}.book-failures__flag{color:var(--error);font-family:var(--font-sans);letter-spacing:.06em;text-transform:uppercase;justify-self:start;font-size:10px;font-weight:700}.book-export{margin-top:var(--sp-xl);padding-top:var(--sp-xl);border-top:1px solid var(--divider)}.book-export__limit{margin-top:4px}.book-export__actions{gap:var(--sp-sm);margin-top:var(--sp-md);flex-wrap:wrap}.book-export__progress{align-items:center;gap:var(--sp-sm);margin-top:var(--sp-md);display:flex}.book-export__progress progress{border:1px solid var(--field-border);border-radius:var(--r-full);background:var(--canvas-tint);appearance:none;flex:1;min-width:0;height:8px;overflow:hidden}.book-export__progress progress::-webkit-progress-bar{background:var(--canvas-tint)}.book-export__progress progress::-webkit-progress-value{background:var(--primary);border-radius:var(--r-full)}.book-export__progress progress::-moz-progress-bar{background:var(--primary);border-radius:var(--r-full)}.book-export__progress-label{min-width:6.5em;color:var(--ink);font-family:var(--font-sans);font-variant-numeric:tabular-nums;text-align:right;opacity:.72;flex:none;font-size:12px;line-height:18px}.book-export__warning{color:var(--error);opacity:1}.book-export__single{margin-top:var(--sp-md)}.book-export[aria-busy=true] #book-export-btn{cursor:progress}.book-preview-panel{margin-top:var(--sp-xxxl)}.book-preview-bar{justify-content:space-between;align-items:center;gap:var(--sp-xs) var(--sp-md);margin-bottom:var(--sp-md);padding:6px 6px 6px var(--sp-md);border:1px solid var(--hairline);border-radius:var(--r-xs);background:var(--canvas-tint);flex-wrap:wrap;display:flex}.book-preview-bar__label{overflow-wrap:anywhere;min-width:0;font-family:var(--font-sans);color:var(--ink);font-size:13px;font-weight:600}.book-sheet{overflow-wrap:anywhere}.book-output{min-height:0}.book-cover{margin-bottom:var(--sp-xxxl);border-bottom:4px solid var(--accent-gold);padding:24px 0 40px}.book-cover__eyebrow{font-family:var(--font-sans);letter-spacing:.12em;text-transform:uppercase;opacity:.6;font-size:11px;font-weight:700}.book-cover__title{margin-top:var(--sp-md);font-family:var(--font-display);font-size:42px;font-weight:400;line-height:1.12}.book-cover__subtitle{max-width:620px;margin-top:var(--sp-sm);font-family:var(--font-sans);opacity:.8;font-size:18px;line-height:1.5}.book-cover__meta{gap:4px var(--sp-xxl);margin-top:var(--sp-xxxl);font-family:var(--font-sans);opacity:.65;flex-wrap:wrap;font-size:12px;line-height:18px;display:flex}.book-toc{margin-bottom:var(--sp-xxxl);padding:var(--sp-xl) var(--sp-xxl);border:1px solid var(--hairline);border-radius:var(--r-md);background:var(--canvas-soft)}.book-toc__title{margin-bottom:var(--sp-sm);font-family:var(--font-sans);font-size:20px;font-weight:800;line-height:1.2}.book-toc__chapters{list-style:none}.book-toc__chapter{margin-top:var(--sp-md);break-inside:avoid}.book-toc__chapter:first-child{margin-top:0}.book-toc__chapter-link{font-family:var(--font-sans);font-size:15px;font-weight:600;line-height:1.4}.book-toc__headings{margin-top:2px;list-style:none}.book-toc__heading{font-family:var(--font-sans);font-size:13px;line-height:1.55}.book-toc__h3{padding-left:14px}.book-toc__h4{padding-left:28px}.book-chapter{margin-top:var(--sp-section);padding-top:var(--sp-xxl);border-top:1px solid var(--divider)}.book-chapters>.book-chapter:first-child{border-top:0;margin-top:0;padding-top:0}.book-chapter__head{align-items:baseline;gap:4px var(--sp-md);margin-bottom:var(--sp-xl);padding-bottom:var(--sp-xs);border-bottom:1px solid var(--hairline);flex-wrap:wrap;display:flex}.book-chapter__kicker{font-family:var(--font-sans);letter-spacing:.1em;text-transform:uppercase;opacity:.55;font-size:11px;font-weight:700}.book-chapter__source{overflow-wrap:anywhere;font-family:var(--font-mono);opacity:.7;font-size:12px}.book-chapter__body>*+*{margin-top:.9em}.book-chapter__body h1,.book-chapter__body h2,.book-chapter__body h3,.book-chapter__body h4,.book-chapter__body h5,.book-chapter__body h6{font-family:var(--font-sans);margin-top:1.45em;font-weight:800;line-height:1.25}.book-chapter__body>h1:first-child,.book-chapter__body>h2:first-child,.book-chapter__body>h3:first-child,.book-chapter__body>h4:first-child{margin-top:0}.book-chapter__body h1{font-size:30px}.book-chapter__body h2{font-size:24px}.book-chapter__body h3{font-size:20px}.book-chapter__body h4{font-size:17px}.book-chapter__body h5,.book-chapter__body h6{text-transform:uppercase;letter-spacing:.04em;font-size:15px}.book-chapter__body p,.book-chapter__body li{font-size:16px;line-height:1.6}.book-chapter__body ul,.book-chapter__body ol{padding-left:1.45em}.book-chapter__body li+li,.book-chapter__body li>ul,.book-chapter__body li>ol{margin-top:.28em}.book-chapter__body .contains-task-list{padding-left:0}.book-chapter__body blockquote{border-left:4px solid var(--hairline);color:#5b6470;margin:1.1em 0;padding:2px 16px}.book-chapter__body hr{border:0;border-top:1px solid var(--hairline);margin:1.6em 0}.book-chapter__body img{max-width:100%;height:auto}.book-chapter__body table{margin:1.1em 0}.book-file-preview{padding-top:var(--sp-xs)}.book-file-preview .book-chapter__head{margin-bottom:var(--sp-md)}.theme-business .book-cover__title{color:#1e3a5f}.theme-academic .book-cover,.theme-academic .book-toc,.theme-academic .book-chapter__head{text-align:left}.theme-dark .book-cover{border-bottom-color:var(--accent-gold)}.theme-dark .book-toc{background:#1b2230;border-color:#2b3444}.theme-dark .book-chapter{border-top-color:#2b3444}.theme-dark .book-chapter__head{border-bottom-color:#2b3444}@page{margin:14mm 13mm}@media print{body{background:#fff}.masthead,.subnav,.hero,.band--teal,.band--soft,.band--tint,.band--warm,.band--forest,.footer,.controls,.preview-head,.book-controls,.book-builder,.book-warnings,.book-preview-bar,.no-print{display:none!important}.band--white{padding:0}body:not([data-print-mode=book]) #book,body[data-print-mode=book] #converter{display:none!important}body[data-print-mode=book] .book-tool{display:block}#converter .band__head,#book .band__head{display:none!important}.container{max-width:none;padding:0}.tool{display:block}.panel{background:#fff;border-radius:0;padding:0}.preview-wrap,.tool-preview,.book-preview-panel,.preview-scroll-container,.book-preview-scroll-container,.sheet{height:auto!important;min-height:0!important;max-height:none!important;box-shadow:none!important;border:none!important;border-radius:0!important;padding:0!important;overflow:visible!important}.theme-dark{color:#000!important;background:#fff!important}.theme-dark .doc a{color:#000!important}.theme-dark .doc pre{border:1px solid #ccc;color:#000!important;background:#f3f4f6!important}.theme-dark .doc th{background:#eee!important}.book-cover{break-after:page}.book-toc{break-after:page;background:#fff!important;border-color:#ccc!important}.book-chapter{break-before:page;border-top:0;margin-top:0;padding-top:0}.book-chapters>.book-chapter:first-child{break-before:auto}.theme-dark .book-chapter,.theme-dark .book-chapter__head{border-color:#ccc!important}.doc pre,.doc blockquote,.doc table,.doc img{break-inside:avoid}.doc h1,.doc h2,.doc h3{break-after:avoid}}@media (width<=1344px){.container{padding-left:var(--sp-xxxl);padding-right:var(--sp-xxxl)}}@media (width<=1100px){.tool{grid-template-columns:340px minmax(0,1fr)}.book-tool{grid-template-columns:360px minmax(0,1fr)}.theme-cards{grid-template-columns:repeat(2,minmax(0,1fr))}.masthead__tag{display:none}}@media (width<=970px){.tool,.book-tool{grid-template-columns:minmax(0,1fr)}.preview-scroll-container,.book-preview-scroll-container{height:clamp(400px,60vh,560px);max-height:560px}.channels{gap:var(--sp-xxl);grid-template-columns:minmax(0,1fr)}.channel+.channel{border-radius:var(--r-md);border-left:0}.feature-grid{grid-template-columns:minmax(0,1fr)}.link-columns{grid-template-columns:repeat(2,minmax(0,1fr))}.display-xl{font-size:40px;line-height:48px}.display-lg{font-size:36px;line-height:43.2px}.statement__lead{font-size:32px;line-height:40px}.lead{font-size:20px;line-height:28px}}@media (width<=770px){.container{padding-left:var(--sp-xxl);padding-right:var(--sp-xxl)}.band{padding:var(--sp-xxl) 0}.hero{padding:var(--sp-xxl) 0 calc(var(--sp-xxl) + 32px);clip-path:polygon(0 0,100% 0,100% calc(100% - 32px),0 100%)}.display-xl{font-size:36px;line-height:43.2px}.sheet{padding:var(--sp-xxl)}.band__head{margin-bottom:var(--sp-xxl)}#book-tree{max-height:340px}.book-cover__title{font-size:34px}}@media (width<=600px){.subnav__inner{gap:14px;padding-left:18px;padding-right:18px}.subnav a{font-size:14px}.lang-switcher__select{max-width:118px;font-size:11px}.theme-cards,.link-columns{grid-template-columns:minmax(0,1fr)}.panel,.sheet{padding:var(--sp-lg)}.preview-scroll-container,.book-preview-scroll-container{height:clamp(360px,55vh,480px);max-height:480px}.btn-row .btn{width:100%}}@media (width<=450px){.subnav__inner{gap:12px;padding-left:16px;padding-right:16px}.subnav a{padding:0 1px;font-size:13px;line-height:20px}.theme-grid{grid-template-columns:minmax(0,1fr)}.masthead__utils .icon-link{display:none}.display-xl{font-size:32px;line-height:38.4px}}@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}.autosave-indicator{color:var(--text-muted);background:var(--bg-surface);border-radius:var(--r-full);border:1px solid var(--border-subtle);user-select:none;align-items:center;gap:6px;padding:3px 8px;font-size:11px;font-weight:500;display:inline-flex}.autosave-dot{background:var(--text-muted);width:7px;height:7px;transition:background var(--trans-fast), box-shadow var(--trans-fast);border-radius:50%}.autosave-dot.saving{background:#f59e0b;animation:1.2s ease-in-out infinite pulse-dot;box-shadow:0 0 6px #f59e0b80}.autosave-dot.saved{background:#10b981;box-shadow:0 0 6px #10b98166}.autosave-dot.unsaved{background:#f59e0b}.autosave-dot.error{background:#ef4444;box-shadow:0 0 6px #ef444466}@keyframes pulse-dot{0%,to{opacity:1;transform:scale(1)}50%{opacity:.4;transform:scale(.85)}}.tool-actions-row{gap:var(--sp-2);margin-top:var(--sp-3);flex-wrap:wrap;display:flex}.book-row-actions{gap:var(--sp-2);margin-top:var(--sp-2);flex-wrap:wrap;display:flex}.site-header[data-astro-cid-kgevm5mn]{z-index:100;background:var(--bg-overlay);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid var(--border-subtle);height:var(--header-height);transition:background var(--trans-fast), border-color var(--trans-fast);position:sticky;top:0;left:0;right:0}.site-header__container[data-astro-cid-kgevm5mn]{max-width:var(--container-max);padding:0 var(--container-gutter);justify-content:space-between;align-items:center;gap:var(--sp-4);height:100%;margin:0 auto;display:flex}.site-header__left[data-astro-cid-kgevm5mn]{align-items:center;gap:var(--sp-3);display:flex}.site-logo[data-astro-cid-kgevm5mn]{color:var(--text-primary);letter-spacing:-.02em;user-select:none;align-items:center;gap:8px;font-size:19px;font-weight:700;text-decoration:none;display:inline-flex}.site-logo__dot[data-astro-cid-kgevm5mn]{border-radius:var(--r-full);background:var(--accent-brand);width:8px;height:8px;box-shadow:0 0 10px var(--accent-brand);animation:3s ease-in-out infinite pulse-glow}@keyframes pulse-glow{0%,to{opacity:.9;transform:scale(1)}50%{opacity:.5;transform:scale(.85)}}.site-logo__badge[data-astro-cid-kgevm5mn]{border-radius:var(--r-full);background:var(--accent-brand-subtle);color:var(--accent-brand);letter-spacing:.04em;text-transform:uppercase;padding:2px 7px;font-size:11px;font-weight:600}.site-nav[data-astro-cid-kgevm5mn]{align-items:center;display:flex}.site-nav__list[data-astro-cid-kgevm5mn]{background:var(--bg-elevated);border-radius:var(--r-full);border:1px solid var(--border-subtle);align-items:center;gap:4px;padding:4px;display:flex}.site-nav__link[data-astro-cid-kgevm5mn]{color:var(--text-secondary);border-radius:var(--r-full);transition:all var(--trans-fast);white-space:nowrap;padding:6px 14px;font-size:13px;font-weight:500;text-decoration:none}.site-nav__link[data-astro-cid-kgevm5mn]:hover{color:var(--text-primary);background:var(--bg-surface)}.site-nav__link[data-astro-cid-kgevm5mn].is-active{color:var(--accent-brand);background:var(--bg-surface);box-shadow:var(--shadow-subtle)}.lang-switcher__select{border-radius:var(--r-md)!important;border:1px solid var(--border-subtle)!important;background-color:var(--bg-surface)!important;height:36px!important;color:var(--text-primary)!important;font-size:13px!important;font-family:var(--font-sans)!important;cursor:pointer!important;transition:all var(--trans-fast)!important;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 8'%3E%3Cpath d='M1 1.5 6 6.5l5-5' fill='none' stroke='%239ca3af' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E")!important;background-position:right 10px center!important;background-repeat:no-repeat!important;background-size:10px 7px!important;padding:0 28px 0 12px!important;font-weight:500!important}.lang-switcher__select:hover{background-color:var(--bg-elevated)!important;border-color:var(--border-medium)!important}.site-header__right[data-astro-cid-kgevm5mn]{align-items:center;gap:var(--sp-2);display:flex}.site-header__history-btn[data-astro-cid-kgevm5mn]{border-radius:var(--r-md);border:1px solid var(--border-subtle);background:var(--bg-surface);height:36px;color:var(--text-primary);font-size:13px;font-weight:500;font-family:var(--font-sans);cursor:pointer;transition:all var(--trans-fast);align-items:center;gap:6px;padding:0 12px;display:inline-flex}.site-header__history-btn[data-astro-cid-kgevm5mn]:hover{background:var(--bg-elevated);border-color:var(--border-medium);color:var(--accent-brand)}.site-header__history-btn[data-astro-cid-kgevm5mn]:focus-visible{outline:2px solid var(--border-focus);outline-offset:2px}.site-header__github[data-astro-cid-kgevm5mn]{border-radius:var(--r-md);border:1px solid var(--border-subtle);background:var(--bg-surface);height:36px;color:var(--text-primary);transition:all var(--trans-fast);align-items:center;gap:6px;padding:0 12px;font-size:13px;font-weight:500;text-decoration:none;display:inline-flex}.site-header__github[data-astro-cid-kgevm5mn]:hover{background:var(--bg-elevated);border-color:var(--border-medium)}.site-header__github[data-astro-cid-kgevm5mn]:focus-visible{outline:2px solid var(--border-focus);outline-offset:2px}.mobile-menu-btn[data-astro-cid-kgevm5mn]{border-radius:var(--r-md);border:1px solid var(--border-subtle);background:var(--bg-surface);width:38px;height:38px;color:var(--text-primary);cursor:pointer;justify-content:center;align-items:center;padding:0;display:none}.mobile-menu-btn__icon[data-astro-cid-kgevm5mn]{justify-content:center;align-items:center;display:flex}.mobile-menu-btn__close[data-astro-cid-kgevm5mn],.mobile-menu-btn[data-astro-cid-kgevm5mn].is-active .mobile-menu-btn__open[data-astro-cid-kgevm5mn]{display:none}.mobile-menu-btn[data-astro-cid-kgevm5mn].is-active .mobile-menu-btn__close[data-astro-cid-kgevm5mn]{display:flex}.mobile-drawer[data-astro-cid-kgevm5mn]{top:var(--header-height);z-index:99;position:fixed;bottom:0;left:0;right:0}.mobile-drawer[data-astro-cid-kgevm5mn]:not([hidden]){display:block}.mobile-drawer__backdrop[data-astro-cid-kgevm5mn]{backdrop-filter:blur(4px);background:#0006;position:absolute;inset:0}.mobile-drawer__content[data-astro-cid-kgevm5mn]{background:var(--bg-surface);border-bottom:1px solid var(--border-subtle);padding:var(--sp-6) var(--container-gutter);max-height:calc(100vh - var(--header-height));box-shadow:var(--shadow-modal);position:relative;overflow-y:auto}.mobile-nav[data-astro-cid-kgevm5mn]{gap:var(--sp-2);flex-direction:column;display:flex}.mobile-nav__link[data-astro-cid-kgevm5mn]{padding:var(--sp-3) var(--sp-4);border-radius:var(--r-md);color:var(--text-secondary);transition:all var(--trans-fast);font-size:15px;font-weight:500;text-decoration:none;display:block}.mobile-nav__link[data-astro-cid-kgevm5mn]:hover,.mobile-nav__link[data-astro-cid-kgevm5mn].is-active{background:var(--bg-elevated);color:var(--text-primary)}.mobile-drawer__footer[data-astro-cid-kgevm5mn]{margin-top:var(--sp-6);padding-top:var(--sp-4);border-top:1px solid var(--border-subtle)}.mobile-history-btn[data-astro-cid-kgevm5mn]{justify-content:center;align-items:center;gap:var(--sp-2);width:100%;padding:var(--sp-3);margin-bottom:var(--sp-2);border-radius:var(--r-md);background:var(--bg-elevated);color:var(--text-primary);font-size:14px;font-family:var(--font-sans);border:1px solid var(--border-subtle);cursor:pointer;transition:all var(--trans-fast);font-weight:500;display:flex}.mobile-history-btn[data-astro-cid-kgevm5mn]:hover{background:var(--bg-subtle);color:var(--accent-brand)}.mobile-github-btn[data-astro-cid-kgevm5mn]{justify-content:center;align-items:center;gap:var(--sp-2);width:100%;padding:var(--sp-3);border-radius:var(--r-md);background:var(--bg-elevated);color:var(--text-primary);font-size:14px;font-family:var(--font-sans);border:1px solid var(--border-subtle);transition:all var(--trans-fast);font-weight:500;text-decoration:none;display:flex}.mobile-github-btn[data-astro-cid-kgevm5mn]:hover{background:var(--bg-subtle);color:var(--accent-brand)}@media (width<=980px){.site-nav[data-astro-cid-kgevm5mn],.site-header__github-text[data-astro-cid-kgevm5mn],.site-header__history-label[data-astro-cid-kgevm5mn]{display:none}.site-header__github[data-astro-cid-kgevm5mn],.site-header__history-btn[data-astro-cid-kgevm5mn]{justify-content:center;width:36px;padding:0}.mobile-menu-btn[data-astro-cid-kgevm5mn]{display:flex}}.site-footer[data-astro-cid-yvkg62gd]{background:var(--bg-surface);border-top:1px solid var(--border-subtle);padding:var(--sp-16) 0 var(--sp-8);color:var(--text-secondary);transition:background var(--trans-fast), border-color var(--trans-fast)}.site-footer__container[data-astro-cid-yvkg62gd]{max-width:var(--container-max);padding:0 var(--container-gutter);margin:0 auto}.site-footer__grid[data-astro-cid-yvkg62gd]{gap:var(--sp-10);padding-bottom:var(--sp-12);border-bottom:1px solid var(--border-subtle);grid-template-columns:minmax(0,1.4fr) repeat(3,minmax(0,1fr));display:grid}.site-footer__brand[data-astro-cid-yvkg62gd]{color:var(--text-primary);letter-spacing:-.02em;margin-bottom:var(--sp-3);align-items:center;gap:8px;font-size:18px;font-weight:700;text-decoration:none;display:inline-flex}.site-footer__dot[data-astro-cid-yvkg62gd]{border-radius:var(--r-full);background:var(--accent-brand);width:8px;height:8px}.site-footer__desc[data-astro-cid-yvkg62gd]{color:var(--text-muted);max-width:320px;margin:0 0 var(--sp-4);font-size:13px;line-height:1.6}.site-footer__desc[data-astro-cid-yvkg62gd] a[data-astro-cid-yvkg62gd]{color:var(--text-primary);text-underline-offset:2px;text-decoration:underline}.site-footer__guarantee[data-astro-cid-yvkg62gd]{color:var(--accent-brand-text);background:var(--accent-brand-subtle);border-radius:var(--r-full);border:1px solid var(--accent-brand-glow);align-items:center;gap:6px;padding:5px 10px;font-size:12px;font-weight:500;display:inline-flex}.site-footer__heading[data-astro-cid-yvkg62gd]{letter-spacing:.04em;text-transform:uppercase;color:var(--text-primary);margin:0 0 var(--sp-4);font-size:13px;font-weight:600}.site-footer__list[data-astro-cid-yvkg62gd]{gap:var(--sp-2);flex-direction:column;margin:0;padding:0;list-style:none;display:flex}.site-footer__list[data-astro-cid-yvkg62gd] a[data-astro-cid-yvkg62gd]{color:var(--text-secondary);transition:color var(--trans-fast);font-size:14px;text-decoration:none}.site-footer__list[data-astro-cid-yvkg62gd] a[data-astro-cid-yvkg62gd]:hover{color:var(--accent-brand)}.site-footer__social[data-astro-cid-yvkg62gd]{align-items:center;gap:var(--sp-2);margin-bottom:var(--sp-4);display:flex}.site-footer__social[data-astro-cid-yvkg62gd] a[data-astro-cid-yvkg62gd]{border-radius:var(--r-md);background:var(--bg-elevated);border:1px solid var(--border-subtle);width:36px;height:36px;color:var(--text-secondary);transition:all var(--trans-fast);justify-content:center;align-items:center;text-decoration:none;display:inline-flex}.site-footer__social[data-astro-cid-yvkg62gd] a[data-astro-cid-yvkg62gd]:hover{background:var(--bg-surface);color:var(--text-primary);border-color:var(--border-medium);transform:translateY(-1px)}.site-footer__controls[data-astro-cid-yvkg62gd]{align-items:center;gap:var(--sp-2);display:flex}.site-footer__bottom[data-astro-cid-yvkg62gd]{justify-content:space-between;align-items:center;gap:var(--sp-4);padding-top:var(--sp-6);flex-wrap:wrap;display:flex}.site-footer__credit[data-astro-cid-yvkg62gd]{color:var(--text-muted);margin:0;font-size:13px}.site-footer__back-top[data-astro-cid-yvkg62gd]{color:var(--text-secondary);transition:color var(--trans-fast);align-items:center;gap:4px;font-size:13px;font-weight:500;text-decoration:none;display:inline-flex}.site-footer__back-top[data-astro-cid-yvkg62gd]:hover{color:var(--text-primary)}@media (width<=860px){.site-footer__grid[data-astro-cid-yvkg62gd]{gap:var(--sp-8);grid-template-columns:repeat(2,minmax(0,1fr))}.site-footer__brand-col[data-astro-cid-yvkg62gd]{grid-column:span 2}}@media (width<=520px){.site-footer__grid[data-astro-cid-yvkg62gd]{grid-template-columns:minmax(0,1fr)}.site-footer__brand-col[data-astro-cid-yvkg62gd]{grid-column:span 1}}