@font-face{font-family:"Onest";src:url("assets/fonts/craft-onest-variable-r1.woff2") format("woff2");font-style:normal;font-weight:100 900;font-display:swap}
@font-face{font-family:"Roboto Mono";src:url("assets/fonts/craft-roboto-mono-variable-r1.woff2") format("woff2");font-style:normal;font-weight:100 700;font-display:swap}
:root{--purple:#584193;--ink:#35264f;--secondary:#746486;--line:#ddd6e9;--paper:#fff;--desk:#f1eef6;--hover:#ebe5f4;--sidebar:280px;--header:88px;color-scheme:light;font-family:"Onest",Arial,sans-serif;color:var(--ink);font-synthesis:none}
*{box-sizing:border-box}
html,body{margin:0;width:100%;height:100%;overflow:hidden}
body{height:100dvh;background:var(--paper);display:flex;flex-direction:column}
button,input,a{-webkit-tap-highlight-color:transparent}
button,input{font:inherit;color:inherit}
button{cursor:pointer;border:0;background:none;padding:0}
a{color:inherit;text-underline-offset:4px}
button,a,input{touch-action:manipulation}
button:disabled,input:disabled{cursor:default;opacity:.34}
button:focus-visible,a:focus-visible,input:focus-visible,[tabindex]:focus-visible{outline:2px solid var(--purple);outline-offset:3px}
::selection{background:#cfc2eb;color:var(--ink)}
input{caret-color:var(--purple)}
*{scrollbar-width:thin;scrollbar-color:#b0a0c8 var(--desk)}
[hidden]{display:none!important}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap}
.icon-library{position:absolute;width:0;height:0;overflow:hidden}
.icon{display:block;width:21px;height:21px;fill:none;stroke:currentColor;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round;flex:none}
.reverse{transform:rotate(180deg)}
.skip-link{position:fixed;top:-60px;left:16px;z-index:100;background:var(--paper);padding:14px}
.skip-link:focus{top:8px}
.masthead{height:var(--header);flex:none;display:flex;align-items:center;padding:0 32px;gap:30px;border-bottom:1px solid var(--line)}
.brand{display:grid;place-items:center;width:95px;height:44px;flex:none}
.brand-mark{width:95px;height:38px;background:var(--purple);mask:url("assets/ikra-logo.png") center/contain no-repeat;-webkit-mask:url("assets/ikra-logo.png") center/contain no-repeat}
.book-title{border-left:1px solid var(--line);padding-left:30px}
.book-title h1{font-size:19px;font-weight:520;line-height:1.2;letter-spacing:-.02em;margin:0 0 5px;color:var(--purple)}
.book-title h1 span{font-weight:610}
.book-title p{font-size:12px;line-height:1.35;margin:0;color:var(--secondary)}
.book-title p span{padding:0 4px}
.download-link{margin-left:auto;display:flex;align-items:center;gap:10px;min-height:44px;font-size:14px;color:var(--purple);text-decoration:none}
.download-link small{font-size:12px;color:var(--secondary);margin-left:2px}
.download-link:hover span{text-decoration:underline;text-underline-offset:5px}
.reader-layout{display:grid;grid-template-columns:0 minmax(0,1fr);flex:1;min-height:0}
.reader-layout.sidebar-open{grid-template-columns:var(--sidebar) minmax(0,1fr)}
.sidebar{display:flex;flex-direction:column;min-height:0;overflow:auto;border-right:1px solid var(--line);padding:27px 20px 25px;background:var(--paper)}
.sidebar-heading{display:flex;align-items:center;justify-content:space-between;padding:0 10px 18px;gap:12px}
.sidebar h2{font-size:21px;font-weight:480;letter-spacing:-.02em;line-height:1.2;margin:0;color:var(--purple)}
.sidebar-heading .icon-button{width:32px;height:32px;min-height:32px}
.sidebar-heading .icon{width:17px;height:17px}
.contents{display:flex;flex-direction:column;gap:5px}
.contents-link{display:flex;align-items:baseline;justify-content:space-between;gap:12px;padding:11px 10px;color:var(--ink);border-radius:3px;font-size:14px;line-height:1.45;text-decoration:none}
.contents-link:hover{background:#f6f3fa;color:var(--purple)}
.contents-link.is-current{background:var(--hover);color:var(--purple)}
.contents-link.is-current>span:first-child{font-weight:610}
.contents-link .folio{font-family:"Roboto Mono",monospace;font-size:13px;line-height:1.1;color:var(--secondary);min-width:17px;text-align:right;margin-left:auto;font-variant-numeric:tabular-nums}
.contents-link.is-current .folio{color:var(--purple)}
.chapter-group{margin-top:12px;padding-top:13px;border-top:1px solid var(--line);display:flex;flex-direction:column;gap:3px}
.chapter-link{font-size:16px;font-weight:520;line-height:1.3;padding-bottom:13px}
.chapter-link small{display:block;font-size:12px;font-weight:400;line-height:1.4;margin-top:7px;color:var(--secondary)}
.sub-link{font-size:13px;padding-top:9px;padding-bottom:9px}
.step-link{gap:9px;font-size:13px;padding-top:9px;padding-bottom:9px}
.step{color:var(--secondary);font-family:"Roboto Mono",monospace;font-size:12px;width:12px;flex:none}



.reader{min-width:0;min-height:0;display:flex;flex-direction:column;position:relative;outline:none}
.toolbar{display:flex;align-items:center;min-height:64px;padding:0 28px;gap:20px;flex:none;background:var(--paper);border-bottom:1px solid var(--line)}
.text-button{display:flex;align-items:center;gap:9px;min-height:44px;font-size:13px;color:var(--purple);white-space:nowrap}
.text-button:hover span{text-decoration:underline;text-underline-offset:4px}
.toolbar-divider{width:1px;height:18px;background:var(--line);flex:none}
.current-section{font-size:13px;line-height:1.4;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;color:var(--secondary);margin:0}
.view-controls{display:flex;align-items:center;gap:12px;margin-left:auto;flex:none}
.icon-button{display:grid;place-items:center;width:38px;min-height:44px;border-radius:3px;color:var(--purple);flex:none}
.icon-button:hover:not(:disabled),.zoom-reset:hover:not(:disabled){background:var(--hover)}
.icon-button[aria-pressed=true]{background:var(--hover)}
.zoom-controls{display:flex;align-items:center}
.zoom-reset{font-size:12px;font-variant-numeric:tabular-nums;min-width:48px;height:44px;border-radius:3px;color:var(--purple)}
.stage{position:relative;flex:1;min-height:0;overflow:auto;overscroll-behavior:contain;background:var(--desk);touch-action:pan-y pinch-zoom;outline-offset:-4px!important}
.stage.is-zoomed{touch-action:pan-x pan-y pinch-zoom}
.book-mat{width:max-content;min-width:100%;min-height:100%;padding:32px 36px;display:flex;align-items:center;justify-content:center}
.book{display:flex;align-items:flex-start;gap:0;flex:none;box-shadow:0 8px 28px rgba(42,30,70,.11);background:var(--paper)}
.book:empty{box-shadow:none;background:none}
.pdf-page{position:relative;flex:none;background:var(--paper);isolation:isolate;overflow:hidden}
.pdf-page+.pdf-page{box-shadow:-1px 0 0 #dfd9e7}
.pdf-page canvas,.pdf-page img{display:block;width:100%;height:100%}
.pdf-page .textLayer{z-index:1}
.pdf-link{position:absolute;z-index:2;background:transparent}
.pdf-link:hover{background:rgba(88,65,147,.1);outline:1px solid var(--purple)}
.loading-note{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);text-align:center;color:var(--purple);font-size:16px}
.loading-note p{margin:16px 0}
.loading-line{display:block;width:120px;height:2px;background:var(--line);overflow:hidden;margin:auto}
.loading-line::after{content:"";display:block;width:45%;height:100%;background:var(--purple);animation:loading 1.2s ease-in-out infinite alternate}
@keyframes loading{to{transform:translateX(125%)}}
.stage.is-rendering:not(.is-empty)::after{content:"";position:absolute;display:block;top:0;left:0;width:100%;height:2px;background:var(--purple);opacity:.5;pointer-events:none}
.error-panel{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:32px;text-align:center;background:var(--desk)}
.error-panel h2{font-size:28px;font-weight:500;letter-spacing:-.02em;margin:0 0 12px;color:var(--purple)}
.error-panel p{font-size:15px;line-height:1.5;margin:0 0 24px;max-width:40ch}
.error-panel>div{display:flex;align-items:center;justify-content:center;gap:22px;flex-wrap:wrap;font-size:14px;color:var(--purple)}
.primary-button{display:flex;align-items:center;justify-content:center;gap:10px;min-height:48px;padding:12px 18px;border-radius:3px;background:var(--purple);color:var(--paper);font-size:14px}
.primary-button:hover{background:#443174}
.reader-footer{flex:none;padding:18px 28px 13px;background:var(--paper);border-top:1px solid var(--line)}
.footer-row{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:24px;min-height:44px}
.page-form{display:flex;align-items:center;gap:12px;white-space:nowrap;font-size:12px;color:var(--secondary)}
.page-form>div{display:flex;align-items:center;gap:5px;color:var(--purple);font-variant-numeric:tabular-nums;font-size:13px}
.page-form input{width:33px;height:34px;border:1px solid var(--line);border-radius:3px;background:var(--paper);text-align:center;font-size:13px;padding:0 3px;color:var(--purple)}
.page-total{color:var(--secondary);margin-left:3px}
.paging-controls{display:flex;gap:8px}
.paging-button{display:grid;place-items:center;width:54px;height:44px;border:1px solid var(--line);border-radius:3px;color:var(--purple)}
.paging-button:hover:not(:disabled){background:var(--hover);border-color:var(--purple)}
.next-button{background:var(--purple);border-color:var(--purple);color:var(--paper)}
.next-button:hover:not(:disabled){background:#443174;color:var(--paper)}
.reading-hint{font-size:11px;line-height:1.5;color:var(--secondary);margin:0;text-align:right}
.page-progress{appearance:none;-webkit-appearance:none;display:block;width:100%;height:24px;margin:7px 0 0;cursor:pointer;background:transparent;--progress:0%}
.page-progress::-webkit-slider-runnable-track{height:2px;background:var(--line)}
.page-progress::-webkit-slider-thumb{-webkit-appearance:none;width:12px;height:12px;border:3px solid var(--paper);border-radius:50%;background:var(--purple);box-shadow:0 0 0 1px var(--purple);margin-top:-5px}
.page-progress::-moz-range-track{height:2px;background:var(--line)}
.page-progress::-moz-range-progress{height:2px;background:var(--purple)}
.page-progress::-moz-range-thumb{width:7px;height:7px;border:2px solid var(--paper);border-radius:50%;background:var(--purple);box-shadow:0 0 0 1px var(--purple)}
.noscript-panel{position:fixed;inset:35% 10%;z-index:90;background:white;padding:40px;color:var(--purple);line-height:1.6}
.drawer-backdrop{position:fixed;inset:0;z-index:60;background:rgba(42,30,70,.25)}
@media(min-width:2000px){:root{--sidebar:330px;--header:108px}.masthead{padding-inline:48px}.brand,.brand-mark{width:116px}.book-title h1{font-size:23px}.book-title p,.download-link{font-size:15px}.toolbar{min-height:76px;padding-inline:40px}.text-button,.current-section{font-size:16px}.contents-link{font-size:17px}.chapter-link{font-size:20px}.sub-link,.step-link{font-size:16px}.sidebar h2{font-size:26px}.sidebar{padding:34px 24px}.toolbar .icon-button{width:46px;min-height:48px}.zoom-reset{font-size:15px;min-width:60px}.reader-footer{padding:22px 40px 17px}.page-form,.page-form>div,.page-form input{font-size:16px}.reading-hint{font-size:14px}.book-mat{padding:48px 60px}}
@media(min-width:900px) and (max-width:1199px){:root{--sidebar:240px}.sidebar{padding-inline:14px}.toolbar{padding-inline:18px;gap:12px}.current-section,.toolbar-divider{display:none}.view-controls{gap:7px}.book-mat{padding:24px}.reader-footer{padding-inline:18px}.reading-hint{font-size:10px;max-width:16ch;margin-left:auto}.footer-row{gap:16px}.desktop-word{display:none}}
@media(max-width:899px){:root{--header:76px}.masthead{padding:0 20px;gap:20px}.brand,.brand-mark{width:76px}.book-title{padding-left:20px}.book-title h1{font-size:17px}.book-title p{font-size:11px}.download-link{font-size:12px}.download-link small{display:none}.reader-layout,.reader-layout.sidebar-open{grid-template-columns:minmax(0,1fr)}.sidebar{position:fixed;inset:0 auto 0 0;width:min(340px,calc(100% - 28px));z-index:70;padding:30px 20px max(24px,env(safe-area-inset-bottom));border:0;box-shadow:8px 0 32px rgba(42,30,70,.12)}.sidebar-heading .icon-button{width:44px;height:44px}.sidebar-heading{padding-bottom:20px}.sidebar h2{font-size:25px}.contents-link{font-size:15px;padding-block:12px}.chapter-link{font-size:18px}.sub-link,.step-link{font-size:14px}.toolbar{min-height:60px;padding:0 20px;gap:12px}.current-section,.toolbar-divider,.view-toggle{display:none}.view-controls{gap:5px}.book-mat{padding:28px 24px}.reader-footer{padding:14px 20px max(9px,env(safe-area-inset-bottom))}.reading-hint{font-size:11px}.footer-row{gap:16px}.page-form{gap:8px}.page-form label{font-size:11px}.desktop-word{display:none}}
@media(max-width:599px){.masthead{padding:0 16px;gap:16px}.brand,.brand-mark{width:65px}.book-title{padding-left:16px}.book-title h1{font-size:15px}.book-title p{font-size:10px}.download-link{width:40px;min-width:40px;justify-content:center;gap:0}.download-link span{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%)}.toolbar{padding:0 14px;min-height:56px;gap:6px}.text-button{font-size:12px;gap:7px}.text-button .icon{width:18px;height:18px}.view-controls{gap:0}.icon-button{width:34px}.zoom-reset{min-width:42px;font-size:11px}.fullscreen-toggle{margin-left:3px}.book-mat{padding:22px 16px}.reader-footer{padding-inline:16px}.footer-row{grid-template-columns:1fr auto;gap:12px}.reading-hint{grid-column:1/-1;text-align:center;font-size:10px;margin-top:1px}.paging-button{width:48px}.page-progress{margin-top:5px}.page-form>div{gap:4px}.error-panel{padding:24px}.error-panel h2{font-size:24px}}
@media(max-width:359px){.book-title h1{font-size:13px}.book-title p{font-size:9px}.masthead{gap:12px;padding-inline:12px}.book-title{padding-left:12px}.brand,.brand-mark{width:56px}.toolbar{padding-inline:10px}.fullscreen-toggle{display:none}.reader-footer{padding-inline:12px}.book-mat{padding-inline:12px}.page-form{gap:6px}}
@media(max-height:560px) and (min-width:600px){:root{--header:60px}.toolbar{min-height:48px}.reader-footer{padding-top:6px;padding-bottom:2px}.book-mat{padding-block:18px}.sidebar{padding-top:14px}.reading-hint{display:none}.footer-row{grid-template-columns:1fr auto}.page-progress{margin-top:0}}
@media(prefers-reduced-motion:reduce){.loading-line::after{animation:none;transform:none;width:100%}*{scroll-behavior:auto!important}}

.book-title h1,.sidebar h2,.error-panel h2{font-family:"Roboto Mono",monospace}

/* Reading controls share the top row; the book owns the space below it. */
.toolbar{flex-wrap:wrap;gap:6px 18px;padding-block:6px}
.page-form{position:relative;flex:none;gap:0}
.page-form>div{gap:3px;font-size:.8125rem}
.page-form input{width:calc(2ch + 14px);min-width:36px;height:44px;font-size:1rem}
.page-go{display:none;position:absolute;top:calc(100% + 4px);right:0;z-index:5;min-width:96px;min-height:44px;padding:8px 12px;border:1px solid var(--purple);border-radius:3px;background:var(--paper);color:var(--purple);font-size:.875rem;box-shadow:0 4px 12px #35264f22}
.page-form:focus-within .page-go{display:block}
.book-mat{padding-bottom:max(24px,env(safe-area-inset-bottom))}
.masthead{height:auto;min-height:var(--header);padding-block:12px}
.book-title h1{font-size:1.1875rem;overflow-wrap:anywhere}
.book-title p{font-size:.75rem}
@media(max-width:899px){.toolbar{gap:4px 12px}.book-title h1{font-size:1rem}.book-title p{font-size:.6875rem}}
@media(max-width:599px){.toolbar{padding-inline:12px;gap:4px 6px}.text-button{font-size:.75rem;gap:5px}.view-controls{gap:0}.zoom-reset{min-width:38px;font-size:.6875rem}.icon-button{width:34px}.book-title h1{font-size:.875rem}.book-title p{font-size:.625rem}}
@media(max-width:419px){.fullscreen-toggle{display:none}}
@media(max-width:359px){.toolbar{padding-inline:10px}.book-title h1{font-size:.8125rem}}