:root{color-scheme:light dark;--bg:#f3f4f0;--ink:#171a18;--muted:#747c77;--faint:#a3aaa5;--surface:rgba(255,255,255,.6);--accent:#647d83;--shade:#e6ebe8;--line:rgba(60,78,70,.1);--display:ui-rounded,"SF Pro Rounded","SF Pro Display",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;--text:"SF Pro Text",-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;--mono:"SFMono-Regular",Consolas,monospace}
[data-theme="dark"]{--bg:#111512;--ink:#edf1ed;--muted:#9ba49e;--faint:#66706a;--surface:rgba(255,255,255,.05);--accent:#9bb5b8;--shade:#1b221e;--line:rgba(210,225,216,.1)}
*{box-sizing:border-box}html{scroll-behavior:smooth;background:var(--bg)}html.drawer-open{overflow:hidden}body{margin:0;color:var(--ink);background:var(--bg);font-family:var(--text);line-height:1.75;-webkit-font-smoothing:antialiased;transition:background .45s,color .45s}button,input{font:inherit}.atmosphere{position:fixed;inset:0;z-index:-1;pointer-events:none;background:radial-gradient(ellipse at 12% 7%,rgba(186,205,202,.22),transparent 34%),radial-gradient(ellipse at 88% 34%,rgba(186,199,209,.16),transparent 38%),radial-gradient(ellipse at 42% 94%,rgba(205,211,204,.18),transparent 42%)}.atmosphere:before{content:"";position:absolute;inset:-18%;background:linear-gradient(122deg,transparent 24%,rgba(116,139,135,.045) 38%,transparent 48%),linear-gradient(154deg,transparent 47%,rgba(130,147,157,.04) 58%,transparent 68%);filter:blur(18px);transform:translate3d(0,var(--stone-shift,0),0) scale(1.08)}[data-theme="dark"] .atmosphere{opacity:.48}
.site-header{position:fixed;z-index:20;inset:0 0 auto;display:flex;align-items:center;justify-content:space-between;padding:max(18px,env(safe-area-inset-top)) max(24px,calc((100vw - 1120px)/2));background:linear-gradient(var(--bg) 15%,transparent);pointer-events:none}.site-header>*{pointer-events:auto}.brand{color:var(--ink);font-size:12px;font-weight:700;letter-spacing:.03em;text-decoration:none}.tools{display:flex;align-items:center;gap:12px;color:var(--faint);font-size:10px;letter-spacing:.12em}.icon,.catalogue-button{border:0;color:var(--muted);background:transparent;cursor:pointer}.icon{display:grid;place-items:center;width:32px;height:32px;padding:0;border-radius:50%;font-size:17px}.icon:hover{color:var(--ink);background:var(--surface)}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.catalogue-button{display:grid;place-items:center;width:36px;height:36px;padding:0;border-radius:50%;transition:color .25s,background .25s,transform .25s}.catalogue-button:hover{color:var(--ink);background:var(--surface);transform:scale(1.04)}.catalogue-button i{display:grid;grid-template-columns:3px 13px;gap:3px 4px;width:20px}.catalogue-button i b{display:contents}.catalogue-button i b:before,.catalogue-button i b:after{content:"";display:block;height:1px;border-radius:1px;background:currentColor}.catalogue-button i b:before{width:3px}.catalogue-button i b:after{width:13px}
.book{width:min(calc(100% - 40px),680px);margin:auto}.word-page{padding:0 0 90px}.hero{min-height:100svh;display:flex;flex-direction:column;justify-content:center;padding:100px 0 42px}.index{color:var(--accent);font-size:10px;font-weight:650;letter-spacing:.17em;text-transform:uppercase}.hero h1{margin:11px 0 8px;font:500 clamp(64px,19vw,108px)/.96 var(--display);letter-spacing:-.065em}.pronounce{display:inline-flex;align-items:center;gap:10px;width:max-content;margin:3px 0;padding:8px 0;border:0;color:var(--muted);background:transparent;cursor:pointer}.play{display:grid;place-items:center;width:25px;height:25px;border-radius:50%;color:var(--accent);background:var(--shade);font-size:9px}.core{max-width:560px;margin:34px 0 0;font-size:clamp(20px,5.5vw,27px);font-weight:430;line-height:1.62;letter-spacing:-.018em}.hint{margin-top:auto;padding-top:42px;color:var(--faint);font-size:9px;letter-spacing:.16em;text-transform:uppercase}.hint span{display:inline-block;margin-left:8px;animation:breathe 2.6s ease-in-out infinite}
.flow{padding:48px 0 22px;font-size:17px;line-height:1.95}.flow p{margin:0 0 20px}.flow blockquote,.module blockquote{margin:24px 0;padding-left:18px;color:var(--ink);border-left:2px solid var(--accent)}.soft{color:var(--muted)}pre{margin:34px 0;padding:30px 18px;overflow:auto;border-radius:22px;color:var(--accent);background:linear-gradient(135deg,var(--surface),rgba(255,255,255,.1));font:12px/1.7 var(--mono);text-align:center;white-space:pre-wrap;box-shadow:inset 0 1px rgba(255,255,255,.38)}.section{padding:62px 0 8px}.eyebrow{margin-bottom:25px;color:var(--accent);font-size:9px;font-weight:700;letter-spacing:.19em;text-transform:uppercase}.module{padding:0 0 52px}.module h2{margin:0 0 18px;font:520 clamp(23px,6vw,31px)/1.3 var(--display);letter-spacing:-.03em}.module p{margin:0 0 15px;color:var(--muted);font-size:15px}.module strong{color:var(--ink);font-weight:580}.definition{padding:58px 0 15px}.def{margin-bottom:28px}.def small{display:block;margin-bottom:7px;color:var(--accent);font-size:9px;font-weight:700;letter-spacing:.18em;text-transform:uppercase}.def p{margin:0;color:var(--muted);font-size:16px}.usage{white-space:pre-line}.chapter-divider{display:flex;align-items:center;gap:15px;margin:40px 0 0;color:var(--faint);font-size:9px;letter-spacing:.15em;text-transform:uppercase}.chapter-divider:before,.chapter-divider:after{content:"";height:1px;flex:1;background:var(--line)}
.reveal{opacity:0;transform:translateY(18px);transition:opacity .75s,transform .75s cubic-bezier(.2,.8,.2,1)}.reveal.visible{opacity:1;transform:none}.book-loader{padding:20px 0 80px;color:var(--faint);font-size:9px;letter-spacing:.16em;text-align:center;text-transform:uppercase}.error{position:fixed;z-index:30;left:50%;bottom:24px;transform:translateX(-50%);margin:0;padding:10px 16px;border-radius:999px;color:var(--muted);background:var(--surface);backdrop-filter:blur(18px)}
.scrim{position:fixed;z-index:39;inset:0;width:100%;height:100%;border:0;background:rgba(18,24,20,.16);backdrop-filter:blur(3px);cursor:default;opacity:0;visibility:hidden;pointer-events:none;transition:opacity .38s ease,visibility 0s linear .38s}.scrim.open{opacity:1;visibility:visible;pointer-events:auto;transition-delay:0s}.catalogue{position:fixed;z-index:40;inset:0 0 0 auto;width:min(390px,90vw);padding:max(24px,env(safe-area-inset-top)) 24px max(24px,env(safe-area-inset-bottom));background:color-mix(in srgb,var(--bg) 92%,transparent);backdrop-filter:blur(28px);box-shadow:-20px 0 60px rgba(35,47,40,.08);opacity:0;visibility:hidden;pointer-events:none;transform:translateX(36px);transition:opacity .34s ease,transform .46s cubic-bezier(.2,.8,.2,1),visibility 0s linear .46s;overflow:hidden}.catalogue.open{opacity:1;visibility:visible;pointer-events:auto;transform:none;transition-delay:0s}.catalogue-head{display:flex;align-items:start;justify-content:space-between}.catalogue-head small{color:var(--accent);font-size:9px;letter-spacing:.18em;text-transform:uppercase}.catalogue-head h2{margin:2px 0 20px;font:520 26px var(--display);letter-spacing:-.03em}.search{display:flex;align-items:center;gap:9px;padding:10px 12px;border-radius:13px;color:var(--faint);background:var(--surface)}.search input{width:100%;border:0;outline:0;color:var(--ink);background:transparent}.search input::placeholder{color:var(--faint)}.catalogue-meta{padding:15px 4px 8px;color:var(--faint);font-size:9px;letter-spacing:.12em;text-transform:uppercase}.group-tabs{display:flex;gap:7px;margin:0 -2px 8px;padding:2px 2px 10px;overflow-x:auto;scrollbar-width:none;overscroll-behavior-x:contain}.group-tabs::-webkit-scrollbar{display:none}.group-tab{flex:0 0 auto;min-width:34px;padding:5px 9px;border:0;border-radius:999px;color:var(--faint);background:transparent;font-size:9px;letter-spacing:.08em;cursor:pointer;transition:color .2s,background .2s}.group-tab:hover{color:var(--ink)}.group-tab.active{color:var(--ink);background:var(--surface);box-shadow:inset 0 0 0 1px var(--line)}.word-list{height:calc(100dvh - 218px);overflow-y:auto;overscroll-behavior:contain;padding:4px 0 50px;scrollbar-width:thin;scrollbar-color:var(--line) transparent;-webkit-overflow-scrolling:touch}.word-item{display:flex;align-items:center;justify-content:space-between;width:100%;padding:10px 7px;border:0;border-radius:9px;color:var(--muted);background:transparent;text-align:left;cursor:pointer;transition:color .2s,background .2s,opacity .25s}.word-item:hover,.word-item.active{color:var(--ink);background:var(--surface)}.word-item span{font:500 16px var(--display)}.word-item small{color:var(--faint);font-size:9px;letter-spacing:.1em}
@keyframes breathe{50%{transform:translateY(5px);opacity:.55}}@media(max-width:520px){.site-header{padding-left:16px;padding-right:16px}.tools #position{display:none}.book{width:calc(100% - 32px)}.hero{padding-top:84px}.flow{padding-top:35px}.section{padding-top:54px}pre{margin-left:-3px;margin-right:-3px;padding:26px 11px;border-radius:18px}.module{padding-bottom:45px}.catalogue{padding-left:19px;padding-right:19px}}@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}.reveal{opacity:1;transform:none}.atmosphere:before{transform:none}}