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*{box-sizing:border-box}body{margin:0;line-height:1.65}a{color:var(--green);text-underline-offset:4px}a:hover{color:#0e4d3d}button,input,select{font:inherit}button,a,input,select,summary{touch-action:manipulation}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid var(--blue);outline-offset:4px}img{max-width:100%;height:auto}.wrap{width:min(1180px,calc(100% - 48px));margin-inline:auto}.skip{position:absolute;top:-100px;left:20px;padding:12px;background:white;z-index:30}.skip:focus{top:10px}.site-header{background:#fff;border-bottom:1px solid var(--line)}.nav{min-height:80px;display:flex;align-items:center;justify-content:space-between;gap:24px}.brand{display:flex;align-items:center;gap:10px;font-size:19px;font-weight:650;color:var(--ink);text-decoration:none;white-space:nowrap}.brand img{width:34px;height:34px;border-radius:9px}.nav-links{display:flex;gap:24px;align-items:center;font-size:14px}.nav-links 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ui-monospace,SFMono-Regular,Menlo,monospace;max-height:560px}.notebook code{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.85em}.notebook pre code{font-size:inherit}.code-cell{margin:20px 0 28px}.cell-prompt{font:11px ui-monospace,monospace;color:#738176;margin-bottom:8px}.output{overflow-x:auto;margin-top:14px;background:white;border-radius:6px}.output>img{display:block;margin-inline:auto}.output table{border-collapse:collapse;font-size:12px;width:max-content;max-width:none}.output td,.output th{padding:7px 10px;border-bottom:1px solid var(--line);text-align:right}.output th{background:#edf3ed}.output pre{background:white;max-height:320px}.table-wrap{overflow-x:auto}.output-html{overflow-x:auto;max-width:100%}.reader-toc{position:sticky;top:26px;font-size:12px;padding:20px 0;border-top:1px solid var(--line)}.reader-toc strong{display:block;margin-bottom:12px}.reader-toc a{display:block;text-decoration:none;line-height:1.5;margin:10px 0;color:var(--muted)}.reader-toc a:hover{color:var(--green)}.reader-toc .button{color:white;margin-top:22px}.license-table{border-collapse:collapse;width:100%;font-size:13px}.license-table th,.license-table td{padding:12px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}.viewer-wrap{overflow-x:auto;min-height:420px}.placeholder-plan{max-width:760px;margin:28px 0 52px}.placeholder-plan li{margin:12px 0;color:var(--muted)}
@media(max-width:1000px){.grid{grid-template-columns:repeat(2,minmax(0,1fr))}.hero{gap:30px}.article-layout{grid-template-columns:minmax(0,1fr)}.reader-toc{position:static;grid-row:1;display:flex;gap:16px;flex-wrap:wrap;padding:12px 0}.reader-toc a{margin:0}.reader-toc strong{display:none}.reader-toc .button{margin:0}}
@media(max-width:640px){.wrap{width:calc(100% - 32px)}.nav{min-height:72px;gap:14px;align-items:center;flex-wrap:wrap;padding:14px 0}.brand{font-size:17px}.nav-links{gap:12px;font-size:12px;flex-wrap:wrap}.nav-links .product-link{display:none}.hero{grid-template-columns:1fr;padding:40px 0 24px;gap:24px}.hero h1,.page-intro h1{font-size:36px}.hero p,.page-intro p{font-size:16px}.hero figure{padding:12px}.grid{grid-template-columns:1fr}.section-heading{display:block;margin-top:28px}.section-heading h2{font-size:25px}.filter-bar{display:block}.filter-bar>div{margin:12px 0}.page-intro{padding-top:32px}.learning-path{gap:14px}.recipe-body h2{font-size:22px}.notebook h1{font-size:29px}.notebook h2{font-size:24px}.notebook p,.notebook li{font-size:15px}.notebook pre{font-size:11px}.reader-toc{display:none}.site-footer{margin-top:44px}.viewer-wrap{max-width:100%}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}
@media print{.site-header,.site-footer,.reader-toc,.filter-bar,.actions{display:none}.wrap{width:100%}.article-layout{display:block}.notebook pre{max-height:none;white-space:pre-wrap}.output{overflow:visible}.output>img{max-height:18cm;object-fit:contain}.code-cell{break-inside:avoid}body{background:white}}

/* Brand surfaces match Vibeit Studio's product page. Scientific figures keep their native colors. */
body{background:var(--bg);color:var(--text)}
a{color:var(--accent)}a:hover{color:var(--accent-2)}
.site-header{background:var(--bg);border-color:var(--line)}
.nav{margin-block:12px;min-height:56px;padding:10px 18px;background:rgba(16,16,20,.66);border:1px solid var(--line);border-radius:999px;backdrop-filter:blur(18px) saturate(160%)}
.brand{color:var(--text)}.nav-links a{color:var(--muted)}.nav-links a[aria-current]{color:var(--accent)}
.language-link{border-color:var(--line-2);border-radius:999px}
.eyebrow{color:var(--accent)}.hero h1{background:linear-gradient(100deg,var(--accent),var(--accent-2));background-clip:text;-webkit-background-clip:text;color:transparent}
.hero p,.facts,.page-intro p{color:var(--muted)}
.button{background:linear-gradient(100deg,var(--accent),var(--accent-2));color:var(--accent-ink)!important;border-color:transparent;border-radius:999px;box-shadow:0 6px 24px rgba(90,169,255,.18)}
.button:hover{background:linear-gradient(100deg,var(--accent),var(--accent-2));box-shadow:0 8px 28px rgba(90,169,255,.3)}
.button.secondary{background:var(--surface);color:var(--text)!important;border-color:var(--line-2);box-shadow:none}
.hero figure,.discipline-card,.recipe-card{background:var(--glass);border-color:var(--glass-line);border-radius:20px}
.hero figure img{border-radius:9px;background:white}.recipe-image{background:white;border-color:var(--glass-line)}
.status{background:rgba(90,169,255,.12);color:var(--accent);border:1px solid rgba(90,169,255,.2);border-radius:999px}
.status.pending{background:var(--surface-2);color:var(--muted);border-color:var(--line)}
.discipline-number{color:var(--faint)}.learning-path strong{color:var(--accent)}
.filter-bar input,.filter-bar select{background:var(--surface);color:var(--text);border-color:var(--line-2)}
.filter-bar input::placeholder{color:var(--faint)}
.note,.notebook blockquote{background:rgba(90,169,255,.08);border-color:var(--accent);color:var(--text)}
.notebook pre{background:var(--surface);border-color:var(--line);color:var(--text)}
.notebook pre.source-code{background:#101014;border-color:var(--line-2)}
.output{background:var(--surface);color:var(--text)}.output pre{background:var(--surface);color:var(--text)}
.output>img{background:white;border-radius:5px}.output th{background:var(--surface-2)}
.output-html span[style*="background:"]{color:#132033}
.notebook .output-html div[style*="font:"]>p{color:var(--muted)}
.reader-toc .button{color:var(--accent-ink)}.skip{background:var(--surface)}
@media(max-width:640px){.nav{border-radius:20px;margin-block:8px;padding:12px}.nav-links{gap:12px}}
@media print{body{background:white;color:#111}.notebook pre,.output{background:#f5f5f5;color:#111}.hero h1{background:none;color:#111}}

.cell-prompt{color:var(--muted)}
.skip{z-index:80}
.notebook h2,.notebook h3{scroll-margin-top:84px}
.reader-toc{top:80px}

/* Fixed course guidance uses the product's blue/cyan note cards. */
/* Fit interactive structure canvases to the reader column before WebGL initializes. */
.output-html [id^="3dmolviewer_"]{width:100%!important;max-width:640px}
.callout{margin:24px 0;padding:18px 22px;border:1px solid rgba(90,169,255,.24);border-inline-start:3px solid var(--accent);border-radius:12px;background:rgba(90,169,255,.07);color:var(--text);min-width:0;break-inside:avoid}
.callout-heading{display:flex;align-items:center;gap:9px;margin-bottom:10px;color:var(--accent-2);font-size:14px;line-height:1.5}
.callout-heading svg{width:19px;height:19px;flex:none}
.callout-content p,.notebook .callout-content p{margin:0;font-size:15px;line-height:1.85;overflow-wrap:anywhere;color:var(--text)}
.callout-content p+p{margin-top:12px}
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@media(max-width:640px){.callout{padding:16px;margin:20px 0}.callout-content p,.notebook .callout-content p{font-size:14px}}
@media print{.callout{background:#f3f7fb;border-color:#aac5e0;color:#111}.callout-heading{color:#235c88}.callout-content p,.notebook .callout-content p{color:#111}.callout-content code{background:#e9eef5}}

/* Stories and figures stay visible; readers can open code and technical notes when ready. */
.advanced-note,.code-disclosure{margin:16px 0;border:1px solid var(--line-2);border-radius:10px;padding:12px 16px;background:var(--surface)}
.advanced-note summary,.code-disclosure summary{cursor:pointer;color:var(--accent-2);font-size:14px;line-height:1.7;overflow-wrap:anywhere}
.advanced-note[open] summary,.code-disclosure[open] summary{margin-bottom:12px}
.notebook .advanced-note p,.notebook .advanced-note li{font-size:14px;color:var(--muted)}
.code-disclosure .source-code{margin-bottom:0}
.principle-sketch{margin:22px 0;padding:16px;background:#fff;border:1px solid #d6dfe8;border-radius:14px;color:#243445;max-width:100%}
.principle-sketch img{display:block;width:100%;max-width:720px;height:auto;margin:0 auto}
.principle-sketch figcaption{font-size:14px;line-height:1.8;margin-top:12px;color:#243445}
@media(max-width:640px){.principle-sketch{padding:10px}.principle-sketch figcaption{font-size:13px}}
.note-ref{font-size:.65em;margin-left:3px}.note-ref-link{text-decoration:none}
.reading-footnotes{margin-top:32px;padding-top:16px;border-top:1px solid var(--line)}
.notebook .reading-footnotes h2{font-size:16px;margin:0 0 12px;color:var(--muted)}
.notebook .reading-footnotes p{font-size:12px;line-height:1.75;color:var(--muted);margin:8px 0;scroll-margin-top:88px}