@import url(fonts.css);

:root{
  --bg:#F5F2EA; --surface:#FFFFFF; --sunk:#ECE7DB; --ink:#1F2420; --muted:#5B625B; --line:#DCD5C5;
  --accent:#B8441A; --accent-soft:#F9E3D6; --accent-ink:#FFFFFF; --forest:#2E5A43; --forest-soft:#E1EDE5;
  --danger:#A52A1F; --danger-soft:#FBE4E1; --warn:#7A5200; --warn-soft:#FFF1CC; --tip:#2A6644; --tip-soft:#E2F1E7;
  --note:#285A86; --note-soft:#E3EEF8; --topbar:#1F2420; --topbar-ink:#F5F2EA;
  --shadow:0 1px 2px rgba(31,36,32,.06),0 8px 24px rgba(31,36,32,.07);
  --head:"Barlow Condensed","Arial Narrow","Roboto Condensed",system-ui,sans-serif;
  --body:"Source Sans 3","Segoe UI",system-ui,-apple-system,sans-serif;
  --r:12px; --side:268px;
  color-scheme:light;
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){
    --bg:#121512; --surface:#1A1E1A; --sunk:#232823; --ink:#E9E6DD; --muted:#A3AA9F; --line:#323830;
    --accent:#FF8A4C; --accent-soft:#3A2418; --accent-ink:#1A0E05; --forest:#8CCBA4; --forest-soft:#1E2E24;
    --danger:#FF8A80; --danger-soft:#3A1D1A; --warn:#F2C35B; --warn-soft:#332A12; --tip:#8CCBA4; --tip-soft:#1C2E22;
    --note:#8DBCEB; --note-soft:#18283A; --topbar:#0B0D0B; --topbar-ink:#E9E6DD;
    --shadow:0 1px 2px rgba(0,0,0,.4),0 8px 24px rgba(0,0,0,.3);
    color-scheme:dark;
  }
}
:root[data-theme="dark"]{
  --bg:#121512; --surface:#1A1E1A; --sunk:#232823; --ink:#E9E6DD; --muted:#A3AA9F; --line:#323830;
  --accent:#FF8A4C; --accent-soft:#3A2418; --accent-ink:#1A0E05; --forest:#8CCBA4; --forest-soft:#1E2E24;
  --danger:#FF8A80; --danger-soft:#3A1D1A; --warn:#F2C35B; --warn-soft:#332A12; --tip:#8CCBA4; --tip-soft:#1C2E22;
  --note:#8DBCEB; --note-soft:#18283A; --topbar:#0B0D0B; --topbar-ink:#E9E6DD;
  --shadow:0 1px 2px rgba(0,0,0,.4),0 8px 24px rgba(0,0,0,.3);
  color-scheme:dark;
}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-padding-top:76px}
body{margin:0;background:var(--bg);color:var(--ink);font:17px/1.6 var(--body);overflow-x:hidden}
img{max-width:100%;height:auto}
a{color:var(--accent);text-underline-offset:2px}
a:hover{text-decoration-thickness:2px}
h1,h2,h3,h4{font-family:var(--head);font-weight:700;line-height:1.1;letter-spacing:.005em;text-wrap:balance;margin:0}
:focus-visible{outline:3px solid var(--accent);outline-offset:2px}
button{font:inherit;color:inherit;cursor:pointer}
.ic{width:1.15em;height:1.15em;flex:none;vertical-align:-.18em}
.skip{position:absolute;left:-999px;top:8px;background:var(--surface);padding:8px 12px;z-index:100}
.skip:focus{left:8px}
.hint{color:var(--muted);font-size:.92rem}
.ghost{display:inline-flex;align-items:center;gap:8px;border:1px solid var(--line);background:var(--surface);border-radius:999px;padding:6px 14px;font-weight:600;font-size:.9rem;color:var(--ink);text-decoration:none}
.ghost:hover{border-color:var(--accent)}
.btn{display:inline-flex;align-items:center;gap:8px;border:0;background:var(--accent);color:var(--accent-ink);border-radius:999px;padding:10px 20px;font-weight:700;text-decoration:none;font-size:1rem}
.btn:hover{filter:brightness(1.08)}
.btn.alt{background:var(--surface);color:var(--ink);border:1px solid var(--line)}

/* top bar */
.top{position:sticky;top:0;z-index:30;display:flex;align-items:center;gap:14px;height:62px;padding:0 16px;background:var(--topbar);color:var(--topbar-ink)}
.brand{display:flex;align-items:center;gap:10px;color:inherit;text-decoration:none;font-family:var(--head);font-size:1.45rem;font-weight:600;letter-spacing:.02em;white-space:nowrap}
.brand b{color:#FF8A4C;font-weight:700}
.menu-btn{display:none;flex-direction:column;justify-content:center;gap:4px;width:40px;height:40px;border:0;background:transparent;border-radius:8px;padding:9px}
.menu-btn span{display:block;height:2px;background:var(--topbar-ink);border-radius:2px}
.search{position:relative;flex:1;max-width:460px;margin-left:auto}
.search .sic{position:absolute;left:12px;top:50%;transform:translateY(-50%);color:#9AA196;pointer-events:none}
.search input{width:100%;height:40px;border-radius:999px;border:1px solid #3A413A;background:#2A302A;color:#F5F2EA;padding:0 14px 0 38px;font:inherit;font-size:.95rem}
.search input::placeholder{color:#9AA196}
.results{position:absolute;top:46px;left:0;right:0;background:var(--surface);color:var(--ink);border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--shadow);max-height:70vh;overflow:auto;padding:6px}
.results a{display:block;padding:9px 12px;border-radius:8px;text-decoration:none;color:var(--ink)}
.results a:hover,.results a.sel{background:var(--sunk)}
.results strong{display:block;font-size:.98rem}
.results small{display:block;color:var(--muted);font-size:.84rem;line-height:1.35}
.results mark{background:var(--accent-soft);color:inherit;border-radius:3px}
.results .none{padding:12px;color:var(--muted)}
.net{font-size:.78rem;font-weight:700;letter-spacing:.06em;text-transform:uppercase;padding:4px 10px;border-radius:999px;white-space:nowrap}
.net.on{background:#24402F;color:#A9E2BD}
.net.off{background:#4A2A16;color:#FFC59E}
.theme-btn{border:0;background:transparent;color:var(--topbar-ink);width:40px;height:40px;border-radius:8px;display:grid;place-items:center}
.theme-btn:hover,.menu-btn:hover{background:#2A302A}

/* shell */
.shell{display:grid;grid-template-columns:var(--side) minmax(0,1fr);min-height:calc(100vh - 62px)}
.side{position:sticky;top:62px;height:calc(100vh - 62px);overflow:auto;border-right:1px solid var(--line);padding:18px 12px 40px;background:var(--bg)}
.navgroup{margin-bottom:16px}
.navgroup h2{font-size:.78rem;font-family:var(--body);font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);margin:0 10px 6px}
.navgroup ul{list-style:none;margin:0;padding:0}
.navgroup a{display:flex;align-items:center;gap:10px;padding:6px 10px;border-radius:8px;text-decoration:none;color:var(--ink);font-size:.95rem;line-height:1.3}
.navgroup a:hover{background:var(--sunk)}
.navgroup a[aria-current]{background:var(--accent-soft);color:var(--accent);font-weight:700}
.navgroup .ic{color:var(--muted)}
.navgroup a[aria-current] .ic{color:var(--accent)}
main{min-width:0}

/* hero */
.hero{padding:44px 40px 36px;background:var(--forest);color:#F5F2EA;position:relative}
.hero.has-img{background-color:#1F2420;background-size:cover;background-position:center;min-height:300px;display:flex;align-items:flex-end}
.hero.has-img::before{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(15,18,15,.15) 0%,rgba(15,18,15,.55) 45%,rgba(15,18,15,.9) 100%)}
.hero-in{position:relative;max-width:820px}
.kicker{margin:0 0 6px;font-weight:700;font-size:.82rem;letter-spacing:.12em;text-transform:uppercase;color:#FFB48A}
.hero h1{font-size:clamp(2.3rem,5vw,3.6rem)}
.lede{font-size:1.18rem;margin:10px 0 0;max-width:62ch;color:#E9E6DD}
.hero-credit{position:absolute;right:12px;bottom:8px;font-size:.72rem;color:rgba(245,242,234,.75);max-width:60%;text-align:right}
.hero-credit a{color:inherit}

/* topic page */
.page{max-width:900px;padding:22px 40px 60px;display:grid;grid-template-columns:minmax(0,1fr);gap:0}
.pagebar{display:flex;justify-content:flex-end;margin-bottom:6px}
.toc{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:14px 18px;margin:0 0 24px}
.toc h2{font-size:1rem;font-family:var(--body);text-transform:uppercase;letter-spacing:.08em;color:var(--muted);margin-bottom:6px}
.toc ol{margin:0;padding-left:1.3em;columns:2;column-gap:28px}
.toc li{break-inside:avoid;font-size:.95rem;padding:1px 0}
.prose{max-width:72ch}
.prose h2{font-size:2rem;margin:40px 0 10px;padding-top:10px;border-top:2px solid var(--line)}
.prose > h2:first-child{margin-top:0;border-top:0;padding-top:0}
.prose h3{font-size:1.4rem;margin:28px 0 6px}
.prose p,.prose ul,.prose ol{margin:0 0 14px}
.prose li{margin:4px 0}
.prose strong{font-weight:700}
.prose hr{border:0;border-top:1px solid var(--line);margin:28px 0}
.prose code{background:var(--sunk);padding:1px 5px;border-radius:4px;font-size:.9em}
.tablewrap{overflow-x:auto;margin:0 0 18px;border:1px solid var(--line);border-radius:var(--r);background:var(--surface)}
table{border-collapse:collapse;width:100%;font-size:.95rem;font-variant-numeric:tabular-nums}
th,td{padding:9px 12px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
th{background:var(--sunk);font-weight:700;font-size:.85rem;letter-spacing:.03em}
tr:last-child td{border-bottom:0}

/* callouts (markdown admonitions) */
.admonition{border-radius:var(--r);padding:14px 18px 4px;margin:0 0 18px;border-left:5px solid var(--note);background:var(--note-soft)}
.admonition-title{font-family:var(--head);font-weight:700;font-size:1.2rem;letter-spacing:.02em;margin:0 0 6px!important;color:var(--note)}
.admonition.danger{border-color:var(--danger);background:var(--danger-soft)}
.admonition.danger .admonition-title{color:var(--danger)}
.admonition.warning{border-color:var(--warn);background:var(--warn-soft)}
.admonition.warning .admonition-title{color:var(--warn)}
.admonition.tip{border-color:var(--tip);background:var(--tip-soft)}
.admonition.tip .admonition-title{color:var(--tip)}
.admonition.local{border-color:var(--accent);background:var(--accent-soft)}
.admonition.local .admonition-title{color:var(--accent)}

/* figures */
.fig{margin:6px 0 22px}
.fig img{display:block;width:100%;border-radius:var(--r);aspect-ratio:16/9;object-fit:cover;background:var(--sunk)}
.fig.tall img{aspect-ratio:4/3}
.fig figcaption{font-size:.9rem;color:var(--muted);margin-top:6px;line-height:1.4}
.credit{display:block;font-size:.75rem;opacity:.85}
.credit a{color:inherit}
.diagram{margin:6px 0 22px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:16px}
.diagram svg{display:block;width:100%;height:auto}
.diagram figcaption{font-size:.9rem;color:var(--muted);margin-top:8px}

/* checklists */
.checklist{list-style:none;padding:0!important}
.chk label{display:flex;gap:10px;align-items:flex-start;padding:6px 10px;border-radius:8px;cursor:pointer}
.chk label:hover{background:var(--sunk)}
.chk input{width:20px;height:20px;margin:3px 0 0;accent-color:var(--forest);flex:none}
.chk input:checked + span{color:var(--muted);text-decoration:line-through;text-decoration-color:var(--line)}
.checkhead{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}
.progress{font-size:.85rem;font-weight:700;color:var(--forest);background:var(--forest-soft);padding:3px 10px;border-radius:999px}

/* videos */
.watch{margin-top:36px;padding-top:18px;border-top:2px solid var(--line)}
.watch h2{font-size:2rem}
.vgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:16px;margin:12px 0 22px}
.vcard{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;display:flex;flex-direction:column}
.vthumb{position:relative;border:0;padding:0;aspect-ratio:16/9;background:linear-gradient(135deg,#2E5A43,#1F2420);display:block;width:100%;overflow:hidden}
.vthumb img{width:100%;height:100%;object-fit:cover;display:block}
.vplay{position:absolute;inset:0;display:grid;place-items:center}
.vplay .ic{width:54px;height:54px;padding:14px;border-radius:50%;background:rgba(184,68,26,.92);color:#fff;fill:#fff}
.vlen{position:absolute;right:8px;bottom:8px;background:rgba(0,0,0,.75);color:#fff;font-size:.75rem;font-weight:700;padding:1px 6px;border-radius:4px}
.vcard iframe{width:100%;aspect-ratio:16/9;border:0;display:block}
.vmeta{padding:10px 12px 12px;display:grid;gap:2px}
.vtitle{color:var(--ink);font-weight:700;text-decoration:none;line-height:1.3;font-size:.98rem}
.vtitle:hover{color:var(--accent)}
.vch{color:var(--muted);font-size:.84rem}
.voff{padding:14px;font-size:.9rem;color:#F5F2EA;position:absolute;inset:0;display:grid;place-items:center;text-align:center;background:rgba(15,18,15,.85)}

/* library cards */
.pdfcard{display:flex;gap:14px;align-items:flex-start;padding:14px 16px;border:1px solid var(--line);border-radius:var(--r);background:var(--surface);text-decoration:none;color:var(--ink);margin:0 0 12px}
.pdfcard:hover{border-color:var(--accent)}
.pdfcard .ic{width:28px;height:28px;color:var(--accent);margin-top:2px}
.pdfcard strong{display:block;font-size:1.05rem}
.pdfcard small{display:block;color:var(--muted);font-size:.85rem}

/* prev / next */
.pn{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:40px}
.pn a{display:block;padding:14px 16px;border:1px solid var(--line);border-radius:var(--r);background:var(--surface);text-decoration:none;color:var(--ink);font-weight:700;font-family:var(--head);font-size:1.25rem}
.pn a:hover{border-color:var(--accent)}
.pn small{display:block;font-family:var(--body);font-size:.78rem;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);font-weight:700}
.pn .next{text-align:right;grid-column:2}

/* home */
.home-hero{position:relative;color:#F5F2EA;background:#1F2420 center/cover no-repeat;padding:70px 40px 54px;min-height:440px;display:flex;align-items:flex-end}
.home-hero::before{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(12,14,12,.92) 0%,rgba(12,14,12,.7) 55%,rgba(12,14,12,.3) 100%)}
.home-hero .hero-in{max-width:700px}
.home-hero h1{font-size:clamp(2.6rem,6vw,4.4rem)}
.cta{display:flex;gap:12px;flex-wrap:wrap;margin-top:22px}
.section{padding:34px 40px 10px;max-width:1240px}
.section > h2{font-size:2.1rem;margin-bottom:4px}
.section > p.hint{margin:0 0 16px;font-size:1rem}
.quick{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:14px;margin-top:-34px;position:relative;padding:0 40px;max-width:1240px}
.qcard{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:16px 18px;box-shadow:var(--shadow);text-decoration:none;color:var(--ink);display:grid;gap:4px}
.qcard:hover{border-color:var(--accent)}
.qcard .ic{width:28px;height:28px;color:var(--accent)}
.qcard strong{font-family:var(--head);font-size:1.35rem}
.qcard span{color:var(--muted);font-size:.92rem;line-height:1.4}
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:16px}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;text-decoration:none;color:var(--ink);display:flex;flex-direction:column}
.card:hover{border-color:var(--accent);box-shadow:var(--shadow)}
.card img{width:100%;aspect-ratio:16/9;object-fit:cover;display:block;background:var(--sunk)}
.card .noimg{aspect-ratio:16/9;display:grid;place-items:center;background:var(--forest-soft);color:var(--forest)}
.card .noimg .ic{width:46px;height:46px}
.card div.txt{padding:12px 16px 16px;display:grid;gap:4px}
.card strong{font-family:var(--head);font-size:1.35rem;display:flex;gap:8px;align-items:center}
.card strong .ic{color:var(--accent)}
.card span{color:var(--muted);font-size:.92rem;line-height:1.45}
.band{margin:30px 40px 10px;border-radius:16px;background:var(--forest);color:#F5F2EA;padding:26px 28px;display:grid;grid-template-columns:minmax(0,1fr) auto;gap:20px;align-items:center;max-width:1160px}
.band h2{font-size:1.9rem}
.band p{margin:6px 0 0;color:#DCE8E0}
.band .btn{background:#FF8A4C;color:#1A0E05}

/* tools */
.tool{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:18px 20px;margin:0 0 22px}
.tool h3{font-size:1.45rem;margin:0 0 4px}
.tool .row{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:12px;margin:12px 0}
.tool label{display:grid;gap:4px;font-size:.85rem;font-weight:700;color:var(--muted)}
.tool input,.tool select{font:inherit;font-size:1rem;color:var(--ink);background:var(--bg);border:1px solid var(--line);border-radius:8px;padding:8px 10px;width:100%}
.tool .out{background:var(--sunk);border-radius:10px;padding:12px 16px;margin-top:8px}
.tool .big{font-family:var(--head);font-size:2rem;font-weight:700;line-height:1.1}
.tool .stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px}
.tool .stats small{display:block;font-size:.8rem;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--muted)}
.loads{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:4px 16px;margin:10px 0}
.loads label{display:flex;gap:8px;align-items:center;font-weight:400;color:var(--ink);font-size:.95rem}
.loads input[type=checkbox]{width:18px;height:18px;accent-color:var(--accent)}
.loads em{color:var(--muted);font-style:normal;font-size:.85rem;margin-left:auto;white-space:nowrap}
.meter{height:10px;border-radius:999px;background:var(--line);overflow:hidden;margin:8px 0}
.meter i{display:block;height:100%;background:var(--tip);border-radius:999px;transition:width .3s}
.meter.warn i{background:var(--warn)}
.meter.bad i{background:var(--danger)}
.status{font-weight:700}
.status.ok{color:var(--tip)} .status.warn{color:var(--warn)} .status.bad{color:var(--danger)}

/* misc pages */
.prose-wide{max-width:900px;padding:22px 40px 60px}
.steps{counter-reset:s;list-style:none;padding:0}
.steps > li{counter-increment:s;position:relative;padding:4px 0 10px 52px;margin:0 0 8px}
.steps > li::before{content:counter(s);position:absolute;left:0;top:0;width:36px;height:36px;border-radius:50%;background:var(--accent);color:var(--accent-ink);display:grid;place-items:center;font-family:var(--head);font-weight:700;font-size:1.2rem}
.save-box{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:18px 20px;margin:0 0 20px}
.save-box .meter{max-width:420px}
.credits td,.credits th{font-size:.88rem}
.foot{border-top:1px solid var(--line);padding:20px 40px 40px;color:var(--muted);font-size:.9rem}
.foot p{margin:4px 0;max-width:900px}

@media (max-width:960px){
  .shell{grid-template-columns:minmax(0,1fr)}
  .menu-btn{display:flex}
  .side{position:fixed;left:0;top:62px;bottom:0;width:min(300px,86vw);height:auto;z-index:25;transform:translateX(-102%);transition:transform .2s;box-shadow:var(--shadow);background:var(--bg)}
  body.nav-open .side{transform:none}
  body.nav-open::after{content:"";position:fixed;inset:62px 0 0 0;background:rgba(0,0,0,.4);z-index:20}
}
@media (max-width:720px){
  body{font-size:16.5px}
  .top{gap:8px;padding:0 10px}
  .brand span{display:none}
  .net{display:none}
  .hero,.home-hero{padding:34px 16px 26px}
  .hero.has-img{min-height:240px}
  .home-hero{min-height:380px}
  .page,.prose-wide{padding:16px 16px 50px}
  .section{padding:28px 16px 6px}
  .quick{padding:0 16px;margin-top:-26px}
  .band{margin:26px 16px 6px;grid-template-columns:minmax(0,1fr);padding:22px 18px}
  .toc ol{columns:1}
  .prose h2{font-size:1.75rem}
  .pn{grid-template-columns:1fr}
  .pn .next{grid-column:1}
  .foot{padding:18px 16px 36px}
  .hero,.home-hero{flex-wrap:wrap}
  .hero-in{flex:1 1 100%}
  .hero-credit{position:static;display:block;max-width:none;text-align:left;margin-top:12px;flex:1 1 100%}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}

@media print{
  .top,.side,.foot,.pagebar,.pn,.watch,.skip,.vgrid,.tool,.toc{display:none!important}
  body{background:#fff;color:#000;font-size:11.5pt}
  .shell{display:block}
  .hero,.hero.has-img{background:none!important;color:#000;min-height:0;padding:0 0 8pt;border-bottom:2pt solid #000}
  .hero.has-img::before,.hero-credit{display:none}
  .hero .lede,.kicker{color:#333}
  .page,.prose-wide{padding:0;max-width:none}
  .prose{max-width:none}
  .prose h2{break-after:avoid;border-top:1pt solid #999}
  .fig{break-inside:avoid;max-width:60%}
  .admonition,.tablewrap,.diagram{break-inside:avoid}
  a{color:#000}
  .chk input{accent-color:#000}
  .print-chapter{break-before:page}
}