/* IBM Plex and Inter, SIL Open Font License 1.1; self-hosted so no visitor data goes to a font CDN. */
@font-face {
  font-family: 'IBM Plex Mono';
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url(fonts/ibm-plex-mono-500-latin-ext.woff2) format('woff2');
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C4, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
@font-face {
  font-family: 'IBM Plex Mono';
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url(fonts/ibm-plex-mono-500-latin.woff2) format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'IBM Plex Mono';
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url(fonts/ibm-plex-mono-600-latin-ext.woff2) format('woff2');
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C4, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
@font-face {
  font-family: 'IBM Plex Mono';
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url(fonts/ibm-plex-mono-600-latin.woff2) format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'IBM Plex Mono';
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url(fonts/ibm-plex-mono-700-latin-ext.woff2) format('woff2');
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C4, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
@font-face {
  font-family: 'IBM Plex Mono';
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url(fonts/ibm-plex-mono-700-latin.woff2) format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'IBM Plex Sans';
  font-style: italic;
  font-weight: 400;
  font-stretch: 100%;
  font-display: swap;
  src: url(fonts/ibm-plex-sans-400-italic-latin-ext.woff2) format('woff2');
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C4, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
@font-face {
  font-family: 'IBM Plex Sans';
  font-style: italic;
  font-weight: 400;
  font-stretch: 100%;
  font-display: swap;
  src: url(fonts/ibm-plex-sans-400-italic-latin.woff2) format('woff2');
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}
@font-face {
  font-family: 'IBM Plex Sans';
  font-style: normal;
  font-weight: 400;
  font-stretch: 100%;
  font-display: swap;
  src: url(fonts/ibm-plex-sans-400-latin-ext.woff2) format('woff2');
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}
@font-face {
  font-family: 'IBM Plex Sans';
  font-style: normal;
  font-weight: 400;
  font-stretch: 100%;
  font-display: swap;
  src: url(fonts/ibm-plex-sans-400-latin.woff2) format('woff2');
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}
@font-face {
  font-family: 'IBM Plex Sans';
  font-style: normal;
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  font-stretch: 100%;
  font-display: swap;
  src: url(fonts/ibm-plex-sans-500-latin-ext.woff2) format('woff2');
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}
@font-face {
  font-family: 'IBM Plex Sans';
  font-style: normal;
  font-weight: 500;
  font-stretch: 100%;
  font-display: swap;
  src: url(fonts/ibm-plex-sans-500-latin.woff2) format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'IBM Plex Sans';
  font-style: normal;
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  font-stretch: 100%;
  font-display: swap;
  src: url(fonts/ibm-plex-sans-600-latin-ext.woff2) format('woff2');
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C4, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
@font-face {
  font-family: 'IBM Plex Sans';
  font-style: normal;
  font-weight: 600;
  font-stretch: 100%;
  font-display: swap;
  src: url(fonts/ibm-plex-sans-600-latin.woff2) format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'IBM Plex Sans';
  font-style: normal;
  font-weight: 700;
  font-stretch: 100%;
  font-display: swap;
  src: url(fonts/ibm-plex-sans-700-latin-ext.woff2) format('woff2');
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C4, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
@font-face {
  font-family: 'IBM Plex Sans';
  font-style: normal;
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  font-stretch: 100%;
  font-display: swap;
  src: url(fonts/ibm-plex-sans-700-latin.woff2) format('woff2');
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}
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  font-family: 'IBM Plex Sans Condensed';
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  font-weight: 600;
  font-display: swap;
  src: url(fonts/ibm-plex-sans-condensed-600-latin-ext.woff2) format('woff2');
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@font-face {
  font-family: 'IBM Plex Sans Condensed';
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  font-display: swap;
  src: url(fonts/ibm-plex-sans-condensed-600-latin.woff2) format('woff2');
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  font-family: 'IBM Plex Sans Condensed';
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  font-display: swap;
  src: url(fonts/ibm-plex-sans-condensed-700-latin-ext.woff2) format('woff2');
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@font-face {
  font-family: 'IBM Plex Sans Condensed';
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  font-weight: 700;
  font-display: swap;
  src: url(fonts/ibm-plex-sans-condensed-700-latin.woff2) format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, 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: 500;
  font-display: swap;
  src: url(fonts/inter-500-latin-ext.woff2) format('woff2');
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C4, U+2113, U+2C60-2C7F, U+A720-A7FF;
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@font-face {
  font-family: 'Inter';
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  font-weight: 500;
  font-display: swap;
  src: url(fonts/inter-500-latin.woff2) format('woff2');
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}
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 800;
  font-display: swap;
  src: url(fonts/inter-800-latin-ext.woff2) format('woff2');
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  src: url(fonts/inter-800-latin.woff2) format('woff2');
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}
/* NetDiagrams site styles.
   Layout idea: pages are drawn like a network drawing. Grid paper behind heroes,
   sections fenced by dashed zone outlines, labels styled as cable tags, Purdue bands as dividers. */
:root{
  --navy:#0F2747; --navy-2:#0B1B33; --ink:#0F2747; --muted:#52627A; --line:#D8DFEA; --line-strong:#7D8DA5;
  --bg:#FFFFFF; --bg-soft:#F3F6FA; --grid:rgba(15,39,71,.07);
  --blue:#2F6FED; --blue-ink:#1D4FC4; --blue-soft:#E8F0FF; --blue-2:#4C8DFF;
  --amber:#FFB020; --amber-ink:#5A3A00; --amber-soft:#FFF3DA;
  --green-ink:#11703F; --green-soft:#E5F6EC; --red:#C2410C;
  --band-1:#1E3F6E; --band-2:#24497F; --band-3:#2A5AB8; --band-4:#2F6FED;
  --radius:10px; --shadow:0 1px 2px rgba(15,39,71,.06),0 10px 28px rgba(15,39,71,.10);
  --display:"IBM Plex Sans Condensed","Arial Narrow",Arial,sans-serif;
  --font:"IBM Plex Sans",ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}
body{margin:0;font-family:var(--font);color:var(--ink);background:var(--bg);font-size:17px;line-height:1.6;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:var(--blue-ink)}
:focus-visible{outline:3px solid var(--amber);outline-offset:2px}
.wrap{max-width:1140px;margin:0 auto;padding-inline:20px}
.narrow{max-width:780px}
h1,h2,h3{font-family:var(--display);line-height:1.1;letter-spacing:-.01em;margin:0 0 .45em;text-wrap:balance}
h1{font-size:clamp(38px,5.4vw,62px);font-weight:700}
h2{font-size:clamp(30px,3.8vw,42px);font-weight:700}
h3,.h3{font-size:22px;font-weight:700}
p{margin:0 0 1em}
code{font-family:var(--mono);font-size:.88em}
.lead{font-size:20px;color:var(--muted)}
.muted{color:var(--muted)}
.center{text-align:center}
section{padding-block:84px}
.soft{background:var(--bg-soft)}
.dark{background:var(--navy-2);color:#fff}
.dark .muted,.dark .lead{color:#B4C4DA}
.dark a:not(.btn):not(.card){color:#CFE0FF}

/* Grid paper, used behind heroes like a draw.io canvas */
.gridpaper{background-color:var(--bg);background-image:linear-gradient(var(--grid) 1px,transparent 1px),linear-gradient(90deg,var(--grid) 1px,transparent 1px);background-size:24px 24px;background-position:-1px -1px}

/* Cable tag: the label style for eyebrows */
.cable{display:inline-flex;align-items:center;gap:8px;font-family:var(--mono);font-size:12.5px;font-weight:600;letter-spacing:.06em;text-transform:uppercase;
  color:var(--ink);background:#fff;border:1.5px solid var(--ink);border-left:7px solid var(--amber);border-radius:4px;padding:3px 9px;margin-bottom:16px;line-height:1.3}
.cable.blue{border-left-color:var(--blue)}
.cable.green{border-left-color:#1F9D57}
.dark .cable{background:transparent;color:#fff;border-color:rgba(255,255,255,.55);border-left-color:var(--amber)}
.tag{display:inline-block;font-family:var(--mono);font-size:12px;font-weight:600;padding:2px 8px;border-radius:4px;background:var(--blue-soft);color:var(--blue-ink);margin-bottom:10px;letter-spacing:.02em}
.tag.free{background:var(--green-soft);color:var(--green-ink)}
.tag.soon{background:var(--amber-soft);color:var(--amber-ink)}

/* Zone outline: a dashed boundary with a label sitting on the line */
.zone{position:relative;border:2px dashed #93AEE0;border-radius:16px;padding:40px 32px 32px}
.zone-label{position:absolute;top:-13px;left:24px;background:var(--bg);font-family:var(--mono);font-size:12.5px;font-weight:600;letter-spacing:.06em;text-transform:uppercase;color:var(--blue-ink);padding:2px 10px}
.soft .zone-label{background:var(--bg-soft)}
.zone.amber{border-color:#E9B45A}.zone.amber .zone-label{color:var(--amber-ink)}
.zone.green{border-color:#7CC59C}.zone.green .zone-label{color:var(--green-ink)}
@media(max-width:620px){.zone{padding:32px 18px 20px}}

/* Purdue bands, used as a divider */
.bands{display:grid;grid-template-columns:repeat(4,1fr);height:30px;font-family:var(--mono);font-size:11px;font-weight:600;color:#fff;letter-spacing:.05em}
.bands span{display:flex;align-items:center;padding-left:12px;white-space:nowrap;overflow:hidden}
.bands span:nth-child(1){background:var(--band-1)}.bands span:nth-child(2){background:var(--band-2)}
.bands span:nth-child(3){background:var(--band-3)}.bands span:nth-child(4){background:var(--band-4)}

/* Header */
.site-header{position:sticky;top:env(safe-area-inset-top,0px);z-index:20;background:rgba(255,255,255,.94);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.site-header .wrap{display:flex;align-items:center;gap:28px;height:64px}
.logo{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);font-family:Inter,var(--font);font-size:21px;font-weight:500;letter-spacing:-.02em}
.logo b{font-weight:800}
.logo svg{width:32px;height:32px;flex:none}
.nav{display:flex;gap:22px;margin-left:auto;align-items:center}
.nav a{text-decoration:none;color:var(--ink);font-weight:500;font-size:15px}
.nav a:hover{color:var(--blue-ink)}
@media(max-width:760px){.site-header .wrap{height:auto;flex-wrap:wrap;padding-block:10px;gap:8px 16px}.nav{width:100%;margin-left:0;gap:16px;overflow-x:auto}.nav a{white-space:nowrap;font-size:14px}.nav .btn{margin-left:auto}}

/* Buttons: amber buys, blue is free */
.btn{display:inline-flex;align-items:center;gap:8px;padding:13px 22px;border-radius:8px;font-weight:700;text-decoration:none;font-size:16px;border:0;cursor:pointer;font-family:var(--font);line-height:1.2}
.btn-buy{background:var(--amber);color:#2B1C00}
.btn-buy:hover{background:#F29D00}
.btn-free{background:var(--blue);color:#fff}
.btn-free:hover{background:#1F5BD6}
.btn-ghost{background:transparent;color:var(--ink);box-shadow:inset 0 0 0 2px var(--line-strong)}
.dark .btn-ghost{color:#fff;box-shadow:inset 0 0 0 2px rgba(255,255,255,.5)}
.btn-sm{padding:9px 16px;font-size:14px}
.btn-row{display:flex;gap:12px;flex-wrap:wrap;margin:24px 0 12px}

/* Hero */
.hero{padding-block:72px 64px;border-bottom:1px solid var(--line)}
.hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:56px;align-items:center}
.hero-grid>*{min-width:0}
@media(max-width:900px){.hero-grid{grid-template-columns:1fr}}
.subtitle{font-family:var(--display);font-size:26px;font-weight:600;color:var(--ink);margin:0 0 4px}
.tagline{font-style:italic;color:var(--muted)}
.outcome{font-size:19px;font-weight:600;margin:18px 0 0;padding-left:14px;border-left:4px solid var(--amber)}
.ticks{list-style:none;padding:0;margin:20px 0}
.ticks li{padding-left:26px;position:relative;margin:8px 0}
.ticks li:before{content:"";position:absolute;left:4px;top:.32em;width:6px;height:12px;border:solid var(--blue);border-width:0 3px 3px 0;transform:rotate(45deg)}
.dark .ticks li:before{border-color:var(--blue-2)}
.chips{display:flex;gap:8px;flex-wrap:wrap;margin-top:10px}
.chips span{font-family:var(--mono);font-size:12.5px;color:var(--muted);background:#fff;border:1px solid var(--line);padding:2px 9px;border-radius:4px}
.dark .chips span{background:transparent;border-color:rgba(255,255,255,.25);color:#B4C4DA}

/* Book mockup */
.book{perspective:1600px;display:flex;justify-content:center}
.book .cover{width:min(340px,80vw);aspect-ratio:2/3;max-width:100%;transform:rotateY(-18deg) rotateX(3deg);border-radius:4px 10px 10px 4px;box-shadow:24px 30px 60px rgba(11,27,51,.35);overflow:hidden;position:relative}
.book .cover svg{width:100%;height:100%;display:block}
.dark .book .cover{outline:1px solid rgba(255,255,255,.18)}
.hero-stack{position:relative;padding:10px 0 30px}
.hero-stack{min-height:440px}
.hero-stack .shot{position:absolute;left:0;top:0;width:88%;transform:rotate(-2deg);border:1px solid var(--line);border-radius:8px;box-shadow:var(--shadow);background:#fff}
.hero-stack .shot figcaption{font-family:var(--mono);font-size:11px;color:var(--muted);padding:6px 10px;border-top:1px solid var(--line)}
.hero-stack .book{position:relative;justify-content:flex-end;padding-top:150px;padding-right:2%}
.hero-stack .book .cover{width:min(230px,52vw)}
@media(max-width:900px){.hero-stack{min-height:0}.hero-stack .book{padding-top:120px}}

/* Grids */
.grid{display:grid;gap:20px}
.grid>*{min-width:0}
.g2{grid-template-columns:repeat(2,1fr)}.g3{grid-template-columns:repeat(3,1fr)}.g4{grid-template-columns:repeat(4,1fr)}
@media(max-width:900px){.g3,.g4{grid-template-columns:repeat(2,1fr)}}
@media(max-width:620px){.g2,.g3,.g4{grid-template-columns:1fr}}
.section-head{max-width:740px;margin:0 auto 44px;text-align:center}

/* Cards are for things you click */
a.card{display:block;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;text-decoration:none;color:var(--ink);transition:transform .15s,box-shadow .15s,border-color .15s}
a.card:hover{transform:translateY(-2px);box-shadow:var(--shadow);border-color:#93AEE0}
a.card h3,a.card .h3{margin-bottom:6px}
a.card p{color:var(--muted);margin:0}
a.card .go{display:inline-block;margin-top:12px;font-weight:700;color:var(--blue-ink)}

/* Plain lists for outcomes and steps */
.outcomes{display:grid;grid-template-columns:repeat(2,1fr);gap:28px 48px;list-style:none;padding:0;margin:0}
@media(max-width:720px){.outcomes{grid-template-columns:1fr}}
.outcomes li{padding-left:22px;border-left:3px solid var(--blue)}
.outcomes strong{display:block;font-family:var(--display);font-size:21px;margin-bottom:4px}
.outcomes span{color:var(--muted)}
.steps{counter-reset:s;display:grid;grid-template-columns:repeat(3,1fr);gap:32px;list-style:none;padding:0;margin:0}
@media(max-width:820px){.steps{grid-template-columns:1fr}}
.steps li{counter-increment:s}
.steps li:before{content:counter(s);display:inline-flex;width:34px;height:34px;align-items:center;justify-content:center;font-family:var(--mono);font-weight:700;border:2px solid var(--ink);border-radius:50%;margin-bottom:12px}
.steps strong{display:block;font-family:var(--display);font-size:21px;margin-bottom:4px}
.steps span{color:var(--muted)}

/* Before and after */
.ba{display:grid;grid-template-columns:1fr 1fr;gap:28px;align-items:start}
.ba>*{min-width:0}
@media(max-width:820px){.ba{grid-template-columns:1fr}}
.ba figure{margin:0}
.ba .frame{border:1px solid var(--line);border-radius:10px;overflow:hidden;background:#fff;box-shadow:var(--shadow)}
.ba .frame svg{display:block;width:100%;height:auto}
.ba .frame img{aspect-ratio:16/10;object-fit:cover;width:100%}
.ba figcaption{margin-top:12px;font-size:15px;color:var(--muted)}
.ba figcaption strong{color:var(--ink)}

/* Memo (the incident report hook) */
.memo{background:#fff;border:1px solid var(--line);border-left:5px solid var(--red);border-radius:8px;padding:22px 26px;font-size:15px;box-shadow:var(--shadow)}
.memo .h{font-family:var(--mono);font-weight:700;letter-spacing:.03em}
.memo ul{margin:8px 0 0;padding-left:20px}

/* Gallery with lightbox */
.gallery{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
@media(max-width:900px){.gallery{grid-template-columns:repeat(2,1fr)}}
@media(max-width:560px){.gallery{grid-template-columns:1fr}}
.gallery button{all:unset;box-sizing:border-box;cursor:zoom-in;display:block;background:#fff;border:1px solid var(--line);border-radius:10px;overflow:hidden;transition:box-shadow .15s,border-color .15s}
.gallery button:hover{box-shadow:var(--shadow);border-color:#93AEE0}
.gallery button:focus-visible{outline:3px solid var(--amber);outline-offset:2px}
.gallery img{aspect-ratio:16/10;object-fit:cover;width:100%}
.gallery .cap{display:block;font-size:14px;color:var(--muted);padding:10px 12px}
.gallery .cap b{font-family:var(--mono);font-size:12px;color:var(--ink);margin-right:6px}
dialog.lightbox{border:0;padding:0;width:min(96vw,1600px);max-height:92vh;background:#fff;border-radius:10px;box-shadow:0 30px 80px rgba(0,0,0,.5)}
dialog.lightbox::backdrop{background:rgba(11,27,51,.82)}
dialog.lightbox .scroll{max-height:calc(92vh - 50px);overflow:auto}
dialog.lightbox img{width:100%;max-width:none}
dialog.lightbox .bar{display:flex;justify-content:space-between;align-items:center;gap:16px;padding:10px 14px;font-size:14px;border-top:1px solid var(--line)}
dialog.lightbox button{font:inherit;font-weight:700;background:var(--ink);color:#fff;border:0;border-radius:6px;padding:6px 12px;cursor:pointer}

/* Annotated screenshot (tool page) */
.annot{position:relative;border:1px solid var(--line);border-radius:10px;overflow:hidden;box-shadow:var(--shadow);background:#fff}
.pin{position:absolute;transform:translate(-50%,-50%);width:30px;height:30px;border-radius:50%;background:var(--amber);color:#2B1C00;font-family:var(--mono);font-weight:700;display:flex;align-items:center;justify-content:center;box-shadow:0 0 0 4px rgba(255,176,32,.35)}
.legend{list-style:none;padding:0;margin:0;display:grid;gap:16px}
.legend li{display:grid;grid-template-columns:30px 1fr;gap:12px;align-items:start}
.legend b{width:30px;height:30px;border-radius:50%;background:var(--amber);font-family:var(--mono);display:flex;align-items:center;justify-content:center}

/* TOC */
.toc{list-style:none;padding:0;margin:0;border-top:1px solid var(--line)}
.toc li{display:grid;grid-template-columns:64px 1fr auto;gap:14px;padding:16px 4px;border-bottom:1px solid var(--line);align-items:baseline}
.toc li>*{min-width:0}
.toc .n{font-family:var(--mono);font-weight:700;color:var(--blue-ink);font-size:14px;font-variant-numeric:tabular-nums}
.toc .t{font-weight:700}
.toc .d{display:block;color:var(--muted);font-size:15px;font-weight:400}
.toc a{font-size:13px;font-weight:700;text-decoration:none;white-space:nowrap}
@media(max-width:520px){.toc li{grid-template-columns:52px 1fr}.toc a{grid-column:2}}

/* Quotes from the book */
.quotes{display:grid;grid-template-columns:repeat(2,1fr);gap:32px 40px}
@media(max-width:720px){.quotes{grid-template-columns:1fr}}
.quote{margin:0;font-family:var(--display);font-size:25px;font-weight:600;line-height:1.3}
.quote cite{display:block;margin-top:10px;font-family:var(--mono);font-size:12px;font-style:normal;font-weight:600;color:var(--muted);letter-spacing:.04em;text-transform:uppercase}

/* Placeholder slots, preview builds only */
.slot{border:2px dashed #E9B45A;background:var(--amber-soft);border-radius:12px;padding:20px 22px;color:var(--amber-ink);font-size:15px}
.slot strong{display:block;font-family:var(--mono);font-size:12.5px;letter-spacing:.06em;text-transform:uppercase;margin-bottom:6px}

/* Author */
.author{display:grid;grid-template-columns:120px 1fr;gap:24px;align-items:start}
.author>*{min-width:0}
.author .photo{width:120px;height:120px;border-radius:50%;background:var(--bg-soft);border:2px dashed var(--line-strong);object-fit:cover}
@media(max-width:560px){.author{grid-template-columns:1fr}}

/* Pricing */
.price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;align-items:stretch}
.price-grid>*{min-width:0}
@media(max-width:900px){.price-grid{grid-template-columns:1fr}}
.price{background:#fff;border:1px solid var(--line);border-radius:14px;padding:28px;display:flex;flex-direction:column;position:relative}
.price.featured{border:2px solid var(--ink);box-shadow:var(--shadow)}
.price>.btn:last-child{margin-top:auto}  /* buttons line up across cards whatever the text length */
.price .flag{position:absolute;top:-14px;left:24px;margin:0}
.price .amt{font-family:var(--display);font-size:48px;font-weight:700;margin:6px 0 2px}
.price ul{list-style:none;padding:0;margin:18px 0 24px;flex:1}
.price li{padding:6px 0 6px 24px;position:relative;font-size:15px}
.price li:before{content:"";position:absolute;left:5px;top:9px;width:6px;height:12px;border:solid var(--blue);border-width:0 3px 3px 0;transform:rotate(45deg)}
.price .note{font-size:13px;color:var(--muted);margin:0 0 16px}
.guarantee{display:flex;gap:18px;align-items:center;max-width:720px;margin:36px auto 0;padding:20px 24px;border-radius:12px;background:#fff;border:2px dashed var(--line-strong)}
.guarantee svg{flex:none;width:48px;height:48px}

/* FAQ */
.faq details{border-bottom:1px solid var(--line);padding:18px 0}
.faq summary{font-weight:700;cursor:pointer;list-style:none;display:flex;justify-content:space-between;gap:16px}
.faq summary::-webkit-details-marker{display:none}
.faq summary:after{content:"+";color:var(--blue-ink);font-family:var(--mono);font-size:22px;line-height:1}
.faq details[open] summary:after{content:"–"}
.faq details p{margin:10px 0 0;color:var(--muted)}

/* Forms */
.signup{display:flex;gap:10px;flex-wrap:wrap;margin-top:16px}
.signup input[type=email]{flex:1 1 220px;min-width:0;padding:13px 16px;border-radius:8px;border:1.5px solid var(--line-strong);font:inherit;font-size:16px;background:#fff;color:var(--ink)}
.dark .signup input[type=email]{border-color:rgba(255,255,255,.4);background:rgba(255,255,255,.06);color:#fff}
.dark .signup input::placeholder{color:#9FB2CC}
.fine{font-size:13px;color:var(--muted);margin-top:8px}
.dark .fine{color:#9FB2CC}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

/* Callout band */
.band{display:grid;grid-template-columns:1.4fr 1fr;gap:32px;align-items:center}
.band>*{min-width:0}
@media(max-width:820px){.band{grid-template-columns:1fr}}
.disclose{font-size:13px;color:var(--muted)}

/* Terminal */
.term{background:var(--navy-2);color:#E3ECFF;border-radius:10px;padding:18px 20px;font-family:var(--mono);font-size:14px;line-height:1.7;overflow-x:auto;white-space:pre;box-shadow:var(--shadow)}
.term .p{color:var(--amber)}.term .c{color:#8DA2C2}

/* Article (free chapters) */
.article-hero{padding-block:56px 32px;border-bottom:1px solid var(--line)}
.article-hero h1{font-size:clamp(32px,4.6vw,50px)}
.article-grid{display:grid;grid-template-columns:250px minmax(0,1fr);gap:56px;padding-block:48px 80px}
@media(max-width:980px){.article-grid{grid-template-columns:minmax(0,1fr)}.side{display:none}}
.side .stick{position:sticky;top:88px;max-height:calc(100vh - 110px);overflow:auto;font-size:14px}
.side ul{list-style:none;padding:0;margin:8px 0 0}
.side li{margin:6px 0}
.side li.l3{padding-left:12px;font-size:13px}
.side a{color:var(--muted);text-decoration:none}
.side a:hover{color:var(--blue-ink)}
.side .mini{margin-top:24px;padding:16px;border:2px dashed #93AEE0;border-radius:10px}
.side .mini p{margin:0;font-weight:600}
.side .mini .signup{flex-direction:column;margin-top:10px}
.side .mini .signup input,.side .mini .btn{width:100%;flex:none;justify-content:center;font-size:14px;padding:10px 12px}
.side .mini .fine{display:none}
.prose{max-width:740px}
.prose h2{font-size:32px;margin-top:2em}
.prose h3{font-size:23px;margin-top:1.6em}
.prose img{border:1px solid var(--line);border-radius:10px;margin:24px 0 6px}
.prose table{border-collapse:collapse;width:100%;font-size:15px;margin:20px 0;display:block;overflow-x:auto}
.prose th,.prose td{border:1px solid var(--line);padding:8px 10px;text-align:left;vertical-align:top}
.prose th{background:var(--bg-soft)}
.prose blockquote{margin:24px 0;padding:16px 20px;border-left:4px solid var(--blue);background:var(--blue-soft);border-radius:0 10px 10px 0}
.prose blockquote p:last-child{margin:0}
.prose pre{background:var(--navy-2);color:#E3ECFF;padding:16px 18px;border-radius:10px;overflow-x:auto;font-size:14px;line-height:1.55}
.prose code{background:var(--bg-soft);padding:1px 5px;border-radius:4px}
.prose pre code{background:none;padding:0;color:inherit}
.prose hr{border:0;border-top:1px solid var(--line);margin:40px 0}
.gate{margin:40px 0;padding:34px 24px 22px}
.inline-cta{margin:48px 0 0;padding:28px;border-radius:14px;background:var(--navy-2);color:#fff;display:grid;grid-template-columns:120px 1fr;gap:24px;align-items:center}
.inline-cta>*{min-width:0}
.inline-cta .book .cover{width:120px;transform:none;box-shadow:0 10px 24px rgba(0,0,0,.35)}
.inline-cta h3{color:#fff}
.inline-cta p{color:#B4C4DA;margin:0 0 6px}
@media(max-width:620px){.inline-cta{grid-template-columns:1fr}}

/* Quiz */
.q-part{margin:40px 0 10px}
.q{display:flex;gap:14px;padding:14px 16px;border:1px solid var(--line);border-radius:10px;margin:10px 0;cursor:pointer;background:#fff}
.q:hover{border-color:#93AEE0}
.q input{width:22px;height:22px;flex:none;margin-top:2px;accent-color:var(--blue)}
.q small{display:block;color:var(--muted);font-family:var(--mono);font-size:12px;margin-top:2px}
.q-abc{border:0;padding:0;margin:26px 0 0;min-width:0}.q-abc legend{padding:0;margin-bottom:6px}.q-abc legend small{display:block;color:var(--muted);font-family:var(--mono);font-size:12px;margin-top:2px}.q-abc .q{margin:6px 0}
.scorebar{position:sticky;bottom:0;background:var(--navy-2);color:#fff;padding-block:8px calc(8px + env(safe-area-inset-bottom,0px));z-index:10}
.scorebar .wrap{display:flex;gap:14px;align-items:baseline;font-family:var(--mono)}
.scorebar .s{font-size:18px;font-weight:700}
.scorebar .tier{font-weight:600;color:var(--amber);font-size:15px}

/* Footer */
.site-footer{background:var(--navy-2);color:#B4C4DA;padding-block:0 32px;font-size:15px}
.site-footer .bands{margin-bottom:48px}
.site-footer .cols{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px}
@media(max-width:820px){.site-footer .cols{grid-template-columns:1fr 1fr}}
.site-footer h2{color:#fff;font-family:var(--mono);font-size:12.5px;letter-spacing:.06em;text-transform:uppercase;margin:0 0 12px}
.site-footer ul{list-style:none;padding:0;margin:0}
.site-footer li{margin:6px 0}
.site-footer a{color:#B4C4DA;text-decoration:none}
.site-footer a:hover{color:#fff}
.site-footer .logo{color:#fff}
.site-footer .legal{border-top:1px solid rgba(255,255,255,.12);margin-top:40px;padding-top:20px;font-size:13px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}

/* Responsive hardening: notches, rotation, short landscape screens, touch targets */
html{-webkit-text-size-adjust:100%;text-size-adjust:100%}
.wrap{padding-inline:max(20px,env(safe-area-inset-left)) max(20px,env(safe-area-inset-right))}
code{overflow-wrap:anywhere}
.site-footer li a,.site-footer .legal a,.toc a{display:inline-block;padding-block:4px}
dialog.lightbox{max-height:92dvh}
dialog.lightbox .scroll{max-height:calc(92dvh - 50px)}
@media(max-width:760px){
  .site-header .wrap{position:relative;padding-block:10px 0;row-gap:0}
  .nav{overflow:visible;flex-wrap:wrap;gap:0 20px}
  .nav a:not(.btn){padding-block:11px}
  .nav .btn{position:absolute;top:8px;right:max(20px,env(safe-area-inset-right));margin:0}
}
@media(max-width:360px){
  .logo{font-size:18px;gap:8px}.logo svg{width:28px;height:28px}
  .nav .btn{padding:9px 11px;font-size:13px}
  .nav{gap:0 14px}
}
@media(max-height:500px) and (orientation:landscape){
  .site-header{position:relative;top:0}
  .hero{padding-block:36px 32px}
  section{padding-block:52px}
}
@media(max-width:300px){.nav .btn{position:static;margin-left:0}}
.csv-list{columns:2;margin:14px 0 0;padding-left:20px;font-family:var(--mono);font-size:14px}
.csv-list a{display:inline-block;padding-block:4px}
@media(max-width:560px){.csv-list{columns:1}}
details.zone summary{cursor:pointer}
.prose td code{white-space:nowrap;overflow-wrap:normal}

/* Compact SegAudit note (the book is the product; this stays a small mention) */
.sa-note{position:relative;max-width:900px;margin:12px auto 48px;padding:30px 28px 24px;border:1.5px dashed var(--line-strong);border-radius:14px;
  display:grid;grid-template-columns:1fr auto;gap:14px 36px;align-items:center;font-size:15px;line-height:1.55;color:var(--muted)}
.sa-note .zone-label{left:20px;color:var(--ink)}
.sa-note p{margin:0}
.sa-note strong{color:var(--ink);font-weight:600}
.sa-link{font-family:var(--mono);font-size:12.5px;font-weight:600;letter-spacing:.05em;text-transform:uppercase;white-space:nowrap;
  color:var(--ink);text-decoration:none;border-bottom:1.5px solid var(--line-strong);padding-bottom:3px}
.sa-link:hover{color:var(--blue-ink);border-color:var(--blue-ink)}
@media(max-width:620px){.sa-note{grid-template-columns:1fr;padding:28px 18px 20px;margin-bottom:36px}.sa-link{justify-self:start}}

/* Tool page: template sheet to chapter map */
.sheet-map{list-style:none;padding:0;margin:20px 0 28px;border-top:1px solid rgba(255,255,255,.15)}
.sheet-map li{display:grid;grid-template-columns:40px minmax(0,1fr) minmax(0,1.4fr);gap:12px;padding:9px 0;border-bottom:1px solid rgba(255,255,255,.15);font-size:15px}
.sheet-map .sh{font-family:var(--mono);font-weight:600;color:var(--amber)}
.sheet-map .ch{color:#B4C4DA}
@media(max-width:520px){.sheet-map li{grid-template-columns:36px minmax(0,1fr)}.sheet-map .ch{grid-column:2}}

/* Tips hub */
.tips-nav{display:flex;flex-wrap:wrap;gap:8px;margin-top:20px}
.tips-nav a{font-family:var(--mono);font-size:13px;font-weight:600;padding:8px 12px;border:1px solid var(--line-strong);border-radius:6px;background:#fff;color:var(--ink);text-decoration:none}
.tips-group{padding-block:48px 0}
.tips-group>h2{font-size:30px;margin:0 0 8px}
.tip{display:grid;grid-template-columns:minmax(0,1fr);gap:28px;padding:28px 0;border-bottom:1px solid var(--line)}
.tip.has-fig{grid-template-columns:minmax(0,1.25fr) minmax(0,1fr);align-items:start}
.tip h3{font-size:23px;margin:10px 0 8px}
.tip .tip-no{margin:0}
.tip-rule{font-family:var(--display);font-size:19px;font-weight:600;color:var(--ink);border-left:4px solid var(--amber);padding-left:14px;line-height:1.4}
.tip-more{font-size:15px;margin-bottom:0}
.tip-fig{display:block;padding:0;border:1px solid var(--line);border-radius:10px;overflow:hidden;background:#fff;cursor:zoom-in;box-shadow:var(--shadow)}
.tip-fig img{display:block;width:100%;height:auto}
.five{font-size:18px;line-height:1.9;margin:8px 0 12px}
@media(max-width:760px){.tip.has-fig{grid-template-columns:minmax(0,1fr)}}

/* Five-book catalog: jpg covers, card thumbnails, sale prices, buy-direct band */
.book .cover.jpg{aspect-ratio:5/8}
.book .cover img{width:100%;height:100%;display:block;object-fit:cover}
.book.thumb{justify-content:flex-start;margin-bottom:16px}
.book.thumb .cover{width:110px;transform:none;box-shadow:0 8px 20px rgba(11,27,51,.25)}
.price .amt s{font-size:24px;font-weight:500;color:var(--muted);margin-left:6px}
.price .sale{margin:0;font-family:var(--mono);font-size:12.5px;font-weight:600;color:#9A5B00;text-transform:uppercase;letter-spacing:.06em}
.direct{max-width:760px;margin:32px auto 0;background:#fff;border:1px dashed var(--line);border-radius:14px;padding:24px 28px}
.direct h3{margin-top:0}

.picks{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:10px;margin:18px 0 8px}
.pick{display:flex;gap:10px;align-items:center;border:1px solid var(--line);border-radius:10px;padding:10px 12px;cursor:pointer;font-size:15px}
.pick:has(input:checked){border-color:var(--blue);background:#E8F0FF}
.pick input{width:18px;height:18px;flex:none}
.pick-msg{min-height:1.4em;color:#B42318;font-size:14px;margin:0 0 8px}
/* checkout: our summary beside Paddle's inline frame */
.checkout{padding-block:28px 72px;min-height:70vh}
.co-back{margin:0 0 28px;font-size:15px}.co-back a{text-decoration:none;font-weight:600}
.co-grid{display:grid;grid-template-columns:minmax(0,.85fr) minmax(0,1fr);gap:40px;align-items:start}
.co-summary{background:#fff}
.co-items{list-style:none;margin:0;padding:0}
.co-items li{display:grid;grid-template-columns:56px 1fr auto;gap:14px;align-items:center;padding:12px 0;border-bottom:1px solid var(--line)}
.co-items li.muted{display:block}
.co-covers{position:relative;width:56px;height:84px}
.co-covers img{position:absolute;top:0;left:0;width:48px;height:auto;border-radius:3px;box-shadow:var(--shadow)}
.co-covers img:only-child{width:56px}
.co-covers img:nth-child(2){left:4px;top:4px}.co-covers img:nth-child(3){left:8px;top:8px}
.co-mark{width:56px;height:84px;border-radius:3px;background:var(--navy);display:block}
.co-items strong{display:block;line-height:1.3}.co-items .muted{font-size:14px;line-height:1.35;display:block;margin-top:2px}
.co-items b{font-variant-numeric:tabular-nums}
.co-totals{display:grid;grid-template-columns:1fr auto;gap:6px 0;margin:16px 0 20px;font-variant-numeric:tabular-nums}
.co-totals dt{color:var(--muted)}.co-totals dd{margin:0;padding-left:16px;text-align:right}
.co-totals .co-total{color:var(--ink);font-weight:700;font-size:20px;border-top:1px solid var(--line);padding-top:10px;margin-top:4px}
.co-ticks{font-size:15px;margin:0 0 12px}
.co-pay{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:8px;min-height:460px}
@media (max-width:860px){.co-grid{grid-template-columns:1fr;gap:28px}.checkout{padding-top:16px}}