/* Site chrome: header, footer, landing page, status badges and placeholder pages.
   Uses the colour tokens defined in reader.css, so light and dark themes follow automatically. */

:root{--pro:#7a4fd0;--pro-soft:#efe8fb;--ok:#2f7d4f;--ok-soft:#e3f1e8;--dev:#a8491a;--dev-soft:#f8e9df;--soon:#5d6b73;--soon-soft:#eceff0}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){--pro:#b393f2;--pro-soft:#261b3b;--ok:#6cc391;--ok-soft:#14281c;--dev:#e59a64;--dev-soft:#2e1d12;--soon:#9aa7ae;--soon-soft:#1f2527}}
:root[data-theme="dark"]{--pro:#b393f2;--pro-soft:#261b3b;--ok:#6cc391;--ok-soft:#14281c;--dev:#e59a64;--dev-soft:#2e1d12;--soon:#9aa7ae;--soon-soft:#1f2527}

/* ------------------------------------------------------------- header -- */
.site-header{display:flex;align-items:center;gap:18px;padding:12px 28px;border-bottom:1px solid var(--rule);
  background:var(--surface);font-family:var(--sans);font-size:13.5px;position:relative;z-index:20}
.brand{display:inline-flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink)}
.brand-mark svg{width:28px;height:28px;display:block}
.brand-mark rect{fill:var(--accent)}
.brand-mark path{fill:none;stroke:var(--paper);stroke-width:3;stroke-linecap:round;stroke-linejoin:round}
.brand-mark circle{fill:var(--w)}
.brand-name{font-weight:650;font-size:15.5px;letter-spacing:-.01em}
.site-nav{display:flex;gap:4px;margin-left:auto;flex-wrap:wrap}
.site-nav a{color:var(--ink-2);text-decoration:none;padding:7px 11px;border-radius:6px;display:inline-flex;align-items:center;gap:6px}
.site-nav a:hover{background:var(--surface-2);color:var(--ink)}
.site-nav a[aria-current=page]{color:var(--ink);background:var(--accent-soft)}
.theme-toggle{width:34px;height:34px;padding:0;border-radius:50%;font-size:15px;display:grid;place-items:center}
@media(max-width:720px){
  .site-header{flex-wrap:wrap;padding:10px 16px;gap:8px}
  .site-nav{order:3;width:100%;margin-left:0;overflow-x:auto;flex-wrap:nowrap;gap:2px}
  .site-nav a{white-space:nowrap;padding:6px 9px}
  .theme-toggle{margin-left:auto}
}

/* ------------------------------------------------------- badges/tags -- */
.pro-badge{display:inline-block;font-family:var(--sans);font-size:9.5px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;
  line-height:1;padding:3px 6px;border-radius:100px;color:#fff;background:linear-gradient(135deg,var(--pro),#c2569b);vertical-align:middle}
.status-badge{display:inline-flex;align-items:center;gap:5px;font-family:var(--sans);font-size:10.5px;font-weight:600;letter-spacing:.04em;
  padding:2px 8px;border-radius:100px;white-space:nowrap;vertical-align:middle;line-height:1.5}
.status-badge::before{content:"";width:6px;height:6px;border-radius:50%;background:currentColor}
.status-available{color:var(--ok);background:var(--ok-soft)}
.status-in-development{color:var(--dev);background:var(--dev-soft)}
.status-planned{color:var(--soon);background:var(--soon-soft)}
.status-in-development::before{animation:pulse 2.4s ease-in-out infinite}
@keyframes pulse{50%{opacity:.35}}
.lesson-tag,.nav-tag{font-family:var(--sans);font-size:9.5px;font-weight:600;letter-spacing:.06em;text-transform:uppercase;
  color:var(--dev);background:var(--dev-soft);padding:1px 6px;border-radius:100px;white-space:nowrap}
.nav-tag{vertical-align:1px}
nav#lessons h2{display:flex;align-items:center;justify-content:space-between;gap:6px}
nav#lessons h2 a{color:inherit;text-decoration:none;padding:0;display:inline;font-size:inherit;border-radius:0}
nav#lessons h2 a:hover{color:var(--accent);background:none}
nav#lessons h2 .status-badge{font-size:9px;letter-spacing:.02em;text-transform:none}
nav#lessons a.nav-placeholder{font-style:italic;color:var(--ink-3);border:1px dashed var(--rule)}

/* ------------------------------------------------------- view switch -- */
body.view-site .layout{display:none}
body.view-site #guRail{display:none}
#landing,#page{font-family:var(--sans);overflow-x:clip}

/* ------------------------------------------------------- lesson banner -- */
.lesson-banner{max-width:680px;display:flex;gap:12px;align-items:flex-start;margin:0 0 26px;padding:12px 14px;border-radius:8px;
  background:var(--dev-soft);border:1px solid color-mix(in srgb,var(--dev) 30%,var(--rule));font-family:var(--sans);font-size:13px;line-height:1.5;color:var(--ink)}
.lesson-banner p{margin:0}
.lesson-banner .status-badge{background:var(--paper);flex:none;margin-top:1px}

/* -------------------------------------------------------------- landing -- */
.section,.band{padding:84px 28px}
.band{background:var(--surface);border-block:1px solid var(--rule)}
.section > *,.band > *{max-width:1140px;margin-inline:auto}
.eyebrow{font-family:var(--sans);font-size:11.5px;font-weight:600;letter-spacing:.14em;text-transform:uppercase;color:var(--accent);margin:0 0 12px}
.section-head{text-align:center;max-width:720px;margin-bottom:40px}
.section-head h2,.pro-copy h2,.about h2{font-family:var(--serif);font-weight:600;font-size:clamp(28px,4vw,40px);line-height:1.12;letter-spacing:-.018em;margin:0 0 14px;text-wrap:balance}
.section-head p:last-child{color:var(--ink-2);font-size:16px;line-height:1.6;margin:0}
.fine{font-size:12.5px;color:var(--ink-3);line-height:1.55}

.hero{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,1fr);gap:56px;align-items:center;max-width:1196px;margin:0 auto;padding:84px 28px 72px;position:relative}
.hero::before{content:"";position:absolute;inset:-40px -20vw auto;height:560px;z-index:-1;pointer-events:none;
  background:radial-gradient(520px 300px at 18% 30%,color-mix(in srgb,var(--accent) 14%,transparent),transparent 70%),
             radial-gradient(420px 260px at 85% 40%,color-mix(in srgb,var(--w) 13%,transparent),transparent 70%)}
.hero h1{font-family:var(--serif);font-weight:700;font-size:clamp(40px,6.4vw,72px);line-height:1.02;letter-spacing:-.03em;margin:0 0 22px;text-wrap:balance}
.hero h1 em{font-style:italic;color:var(--accent)}
.lede{font-family:var(--serif);font-size:clamp(17px,1.8vw,20px);line-height:1.55;color:var(--ink-2);margin:0 0 30px;max-width:36em}
.cta-row{display:flex;gap:12px;flex-wrap:wrap;margin:0 0 30px}
.btn{display:inline-flex;align-items:center;gap:8px;font-family:var(--sans);font-size:14px;font-weight:600;padding:12px 20px;border-radius:8px;text-decoration:none;
  border:1px solid var(--rule);transition:transform .15s ease,box-shadow .15s ease,background .15s ease}
.btn:hover{transform:translateY(-1px);box-shadow:var(--shadow)}
.btn-primary{background:var(--accent);border-color:var(--accent);color:var(--paper)}
.btn-ghost{background:var(--paper);color:var(--ink)}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent)}
.stats{display:flex;flex-wrap:wrap;gap:12px 34px;margin:0 0 18px;padding:18px 0 0;border-top:1px solid var(--rule)}
.stats div{display:flex;flex-direction:column}
.stats dt{font-family:var(--serif);font-size:30px;font-weight:700;line-height:1.1;letter-spacing:-.02em;font-variant-numeric:tabular-nums}
.stats dd{margin:0;font-size:12.5px;color:var(--ink-3)}
.hero-figure{margin:0;border:1px solid var(--rule);border-radius:14px;background:var(--paper);box-shadow:var(--shadow);overflow:hidden}
.hero-art{display:block;width:100%;height:auto}
.hero-art .g{stroke:var(--grid);stroke-width:1}
.hero-art .ax{stroke:var(--axis);stroke-width:1.4}
.hero-art .par{fill:color-mix(in srgb,var(--w) 12%,transparent);stroke:none}
.hero-art .dash{stroke:var(--ink-3);stroke-width:1.2;stroke-dasharray:4 5;fill:none}
.hero-art .su,.hero-art .sv,.hero-art .sw{stroke-width:3.4;fill:none;stroke-linecap:round;stroke-dasharray:400;stroke-dashoffset:400;animation:draw 1.1s ease-out forwards}
.hero-art .su{stroke:var(--u)}.hero-art .sv{stroke:var(--v);animation-delay:.35s}.hero-art .sw{stroke:var(--w);animation-delay:.8s}
.hero-art .fu{fill:var(--u)}.hero-art .fv{fill:var(--v)}.hero-art .fw{fill:var(--w)}
.hero-art text{font-family:var(--serif);font-style:italic;font-size:19px;font-weight:600}
.hero-art .tu{fill:var(--u)}.hero-art .tv{fill:var(--v)}.hero-art .tw{fill:var(--w)}
.hero-art .o{fill:var(--ink)}
@keyframes draw{to{stroke-dashoffset:0}}
.hero-caption{margin:0;padding:12px 16px;border-top:1px solid var(--rule);font-size:12.5px;color:var(--ink-3);background:var(--surface)}

.feature-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px}
.feature{background:var(--paper);border:1px solid var(--rule);border-radius:12px;padding:24px 22px}
.feature h3{font-family:var(--sans);font-size:15.5px;font-weight:600;margin:14px 0 8px}
.feature p{margin:0;font-size:13.5px;line-height:1.6;color:var(--ink-2)}
.ico{width:38px;height:38px;padding:8px;border-radius:9px;background:var(--accent-soft);stroke:var(--accent);fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}

.roadmap{display:flex;justify-content:center;flex-wrap:wrap;gap:8px;margin-bottom:18px}
.chip{display:inline-flex;align-items:center;gap:8px;border-radius:100px;padding:6px 12px;font-size:12.5px}
.chip > span:last-child{font-family:var(--mono);color:var(--ink-3)}
.chip[aria-pressed=true]{border-color:var(--accent);background:var(--accent-soft);color:var(--ink)}
.dev-note{max-width:820px;margin:0 auto 34px;padding:14px 18px;border-radius:10px;border:1px dashed color-mix(in srgb,var(--dev) 45%,var(--rule));
  background:color-mix(in srgb,var(--dev-soft) 60%,transparent);font-size:13.5px;line-height:1.6;color:var(--ink-2);text-align:center}
.dev-note strong{color:var(--ink)}
.track-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:14px}
.track-card{display:flex;gap:14px;padding:18px;border:1px solid var(--rule);border-radius:12px;background:var(--paper);text-decoration:none;color:var(--ink);
  transition:border-color .15s ease,transform .15s ease,box-shadow .15s ease;position:relative}
.track-card:hover{border-color:var(--accent);transform:translateY(-2px);box-shadow:var(--shadow)}
.track-card.is-planned{background:repeating-linear-gradient(135deg,var(--paper) 0 10px,var(--surface) 10px 20px);border-style:dashed}
.track-num{font-family:var(--mono);font-size:13px;font-weight:600;color:var(--accent);padding-top:2px}
.track-body{display:flex;flex-direction:column;gap:6px;min-width:0}
.track-title{font-weight:600;font-size:15px;line-height:1.3}
.track-blurb{font-size:13px;line-height:1.5;color:var(--ink-2)}
.track-meta{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-top:auto;padding-top:6px}
.track-count{font-size:12px;color:var(--ink-3)}

.pro-wrap{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.05fr);gap:48px;align-items:center}
.pro-copy p{color:var(--ink-2);font-size:15px;line-height:1.65}
.pro-copy .eyebrow{color:var(--pro);display:flex;align-items:center;gap:8px}
.checks{list-style:none;padding:0;margin:18px 0;display:grid;gap:9px;font-size:14px}
.checks li{padding-left:26px;position:relative;line-height:1.5}
.checks li::before{content:"✓";position:absolute;left:0;top:0;width:18px;height:18px;border-radius:50%;display:grid;place-items:center;font-size:11px;font-weight:700;color:var(--pro);background:var(--pro-soft)}
.checks b{font-family:var(--mono);color:var(--accent)}
.plans{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.plan{background:var(--paper);border:1px solid var(--rule);border-radius:14px;padding:24px;display:flex;flex-direction:column}
.plan h3{margin:0;font-size:18px;display:flex;align-items:center;gap:8px}
.plan .price{margin:6px 0 16px;font-size:13px;color:var(--ink-3)}
.plan ul{list-style:none;margin:0 0 22px;padding:0;display:grid;gap:8px;font-size:13.5px;color:var(--ink-2)}
.plan li::before{content:"·";color:var(--accent);font-weight:700;margin-right:8px}
.plan .btn{margin-top:auto;justify-content:center}
.plan-pro{border:1.5px solid color-mix(in srgb,var(--pro) 60%,var(--rule));box-shadow:0 10px 40px color-mix(in srgb,var(--pro) 16%,transparent)}
.plan-pro .btn-primary{background:linear-gradient(135deg,var(--pro),#c2569b);border-color:transparent;color:#fff}

.about{display:grid;grid-template-columns:auto minmax(0,1fr);gap:36px;max-width:860px !important;align-items:start}
.avatar{width:120px;height:120px;border-radius:50%;display:grid;place-items:center;font-family:var(--serif);font-size:42px;font-weight:700;
  color:var(--paper);background:linear-gradient(135deg,var(--accent),color-mix(in srgb,var(--accent) 50%,var(--w)));box-shadow:var(--shadow)}
.about .role{margin:-6px 0 16px;color:var(--ink-3);font-size:14px}
.about p{font-size:15px;line-height:1.7;color:var(--ink-2)}

@media(max-width:980px){
  .hero{grid-template-columns:1fr;gap:36px;padding-top:56px}
  .feature-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .pro-wrap{grid-template-columns:1fr}
}
@media(max-width:600px){
  .section,.band{padding:56px 16px}
  .hero{padding:44px 16px 48px}
  .feature-grid,.plans{grid-template-columns:1fr}
  .about{grid-template-columns:1fr;gap:20px}
  .avatar{width:84px;height:84px;font-size:30px}
}

/* ------------------------------------------------- track/legal pages -- */
.page-narrow{max-width:780px;margin:0 auto;padding:48px 28px 90px}
.page-narrow h1{font-family:var(--serif);font-weight:700;font-size:clamp(30px,4.6vw,46px);line-height:1.1;letter-spacing:-.02em;margin:0 0 14px;display:flex;align-items:center;gap:14px;flex-wrap:wrap}
.page-narrow h1 .status-badge{font-size:12px}
.page-narrow h2{font-family:var(--serif);font-weight:600;font-size:22px;margin:34px 0 10px}
.page-narrow p{font-size:15px;line-height:1.7;color:var(--ink-2)}
.crumbs{font-size:12.5px;color:var(--ink-3);margin-bottom:26px}
.crumbs a,.pager a{display:inline;padding:0;font-size:inherit;border-radius:0;background:none}
.crumbs a{color:var(--ink-3)}
.placeholder{margin:30px 0;padding:34px 30px;text-align:center;border:1.5px dashed color-mix(in srgb,var(--dev) 45%,var(--rule));border-radius:14px;
  background:repeating-linear-gradient(135deg,transparent 0 12px,color-mix(in srgb,var(--dev-soft) 55%,transparent) 12px 24px)}
.placeholder h2{margin:10px 0 10px;font-size:24px}
.placeholder p{max-width:560px;margin:0 auto 10px}
.placeholder.slim{text-align:left;padding:18px 22px;background:var(--dev-soft);border-style:solid;border-color:color-mix(in srgb,var(--dev) 25%,var(--rule))}
.placeholder.slim h2{margin:0 0 6px;font-size:18px}
.placeholder.slim p{margin:0;max-width:none;font-size:14px}
.placeholder.ok{background:var(--ok-soft);border-color:color-mix(in srgb,var(--ok) 25%,var(--rule))}
.placeholder-icon .ico{width:52px;height:52px;padding:11px;background:var(--dev-soft);stroke:var(--dev)}
.lesson-list{list-style:none;counter-reset:l;padding:0;margin:26px 0;border:1px solid var(--rule);border-radius:12px;overflow:hidden}
.lesson-list li{counter-increment:l;border-top:1px solid var(--rule)}
.lesson-list li:first-child{border-top:none}
.lesson-list a{display:flex;align-items:center;gap:12px;padding:15px 18px;text-decoration:none;color:var(--ink);font-size:15px}
.lesson-list a::before{content:counter(l,decimal-leading-zero);font-family:var(--mono);font-size:12px;color:var(--ink-3)}
.lesson-list a:hover{background:var(--surface)}
.lesson-list .lesson-title{flex:1;min-width:0}
.lesson-list .arrow{color:var(--accent)}
.pager{display:flex;justify-content:space-between;gap:16px;margin-top:40px;padding-top:20px;border-top:1px solid var(--rule);font-size:14px}
.legal h2{scroll-margin-top:20px}
@media(max-width:600px){.page-narrow{padding:32px 16px 70px}}

/* -------------------------------------------------------------- footer -- */
.site-footer{border-top:1px solid var(--rule);background:var(--surface);font-family:var(--sans);padding:52px 28px 28px;margin-top:0}
.footer-grid{max-width:1140px;margin:0 auto;display:grid;grid-template-columns:1.6fr repeat(3,1fr);gap:32px}
.footer-brand p{font-size:13px;color:var(--ink-3);line-height:1.6;max-width:28em;margin:12px 0 0}
.footer-grid h2{font-size:11px;font-weight:600;letter-spacing:.12em;text-transform:uppercase;color:var(--ink-3);margin:4px 0 12px}
.footer-grid div > a:not(.brand){display:block;font-size:13.5px;color:var(--ink-2);text-decoration:none;padding:4px 0}
.footer-grid div > a:not(.brand):hover{color:var(--accent)}
.footer-base{max-width:1140px;margin:38px auto 0;padding-top:20px;border-top:1px solid var(--rule);font-size:12px;color:var(--ink-3);line-height:1.6}
.footer-base p{margin:0 0 6px}
.footer-base strong{color:var(--ink-2)}
@media(max-width:760px){.footer-grid{grid-template-columns:1fr 1fr}.footer-brand{grid-column:1/-1}.site-footer{padding:40px 16px 24px}}

/* ------------------------------------------------- tutor Pro marking -- */
.gu-modal h2{display:flex;align-items:center;gap:8px}
.pro-callout{font-size:12.5px;line-height:1.55;color:var(--ink);background:var(--pro-soft);border:1px solid color-mix(in srgb,var(--pro) 30%,var(--rule));
  border-radius:8px;padding:10px 12px;margin:8px 0 12px}
.pro-callout a{color:var(--pro);font-weight:600}
button .pro-badge{margin-left:4px;font-size:8.5px;padding:2px 5px}
#tutor-connect{border-color:color-mix(in srgb,var(--pro) 40%,var(--rule))}
#tutor-connect:hover{border-color:var(--pro);color:var(--pro)}

@media (prefers-reduced-motion:reduce){.hero-art .su,.hero-art .sv,.hero-art .sw{stroke-dashoffset:0}.btn:hover,.track-card:hover{transform:none}}
@media print{.site-header,.site-footer,#landing{display:none}}

/* ------------------------------------------------- track landing pages -- */
.track-page{max-width:860px}
.track-overview{font-size:15.5px !important;line-height:1.75 !important;color:var(--ink) !important;margin:0 0 26px}
.track-facts{display:flex;flex-wrap:wrap;gap:12px;margin:0 0 18px}
.track-facts div{flex:1 1 150px;padding:14px 16px;border:1px solid var(--rule);border-radius:10px;background:var(--surface)}
.track-facts dt{font-family:var(--serif);font-size:26px;font-weight:700;line-height:1.1;font-variant-numeric:tabular-nums}
.track-facts dd{margin:2px 0 0;font-size:12.5px;color:var(--ink-3)}
.track-progress{margin:0 0 26px}
.track-progress .bar{display:flex;height:8px;border-radius:100px;background:var(--soon-soft);overflow:hidden}
.track-progress .bar span{display:block;height:100%}
.seg-published{background:var(--ok)}
.seg-early{background:var(--dev)}
.seg-planned{background:var(--soon-soft);border:1px solid var(--rule)}
.track-progress .legend{display:flex;flex-wrap:wrap;gap:6px 18px;margin-top:8px;font-size:12px;color:var(--ink-3)}
.track-progress .legend i{display:inline-block;width:9px;height:9px;border-radius:2px;margin-right:6px;vertical-align:-1px}
.builds-on{display:flex;flex-wrap:wrap;align-items:center;gap:6px;margin:4px 0 0}
.builds-on > span{font-size:11px;font-weight:600;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-3);margin-right:6px}
.chip-link{font-size:12.5px;text-decoration:none;color:var(--ink-2);border:1px solid var(--rule);border-radius:100px;padding:3px 10px;background:var(--paper)}
.chip-link:hover{border-color:var(--accent);color:var(--accent)}
.overview-box{margin:30px 0;padding:22px 24px 6px;border:1px solid var(--rule);border-radius:14px;background:var(--surface)}
.overview-box h2{margin:0 0 6px !important;font-size:19px !important}
.overview-box p{margin:0;font-size:14px !important}
.overview-box .lesson-list{background:var(--paper);margin:16px 0}
.module-map > h2{margin-top:44px !important}
.part{margin:26px 0 0}
.part h3{font-family:var(--serif);font-size:19px;font-weight:600;margin:0 0 4px;display:flex;align-items:baseline;gap:10px;flex-wrap:wrap}
.part-label{font-family:var(--sans);font-size:11px;font-weight:600;letter-spacing:.12em;text-transform:uppercase;color:var(--accent)}
.part-thesis{margin:0 0 12px !important;font-family:var(--serif);font-style:italic;font-size:15px !important;color:var(--ink-2)}
.modules{list-style:none;margin:0;padding:0;border:1px solid var(--rule);border-radius:12px;overflow:hidden}
.module{display:grid;grid-template-columns:62px minmax(0,1fr) auto;align-items:center;gap:12px;padding:12px 16px;border-top:1px solid var(--rule);font-size:14.5px}
.module:first-child{border-top:none}
.module-handle{font-family:var(--mono);font-size:12px;color:var(--ink-3)}
.module-title a{color:var(--ink);text-decoration:none;font-weight:500}
.module-title a:hover{color:var(--accent);text-decoration:underline}
.module.is-planned .module-title{color:var(--ink-2)}
.module.is-published{background:color-mix(in srgb,var(--ok-soft) 45%,transparent)}
.module-meta{display:flex;align-items:center;gap:10px}
.module-hours{font-family:var(--mono);font-size:11.5px;color:var(--ink-3)}
@media(max-width:600px){
  .module{grid-template-columns:48px minmax(0,1fr);row-gap:6px}
  .module-meta{grid-column:2}
}

/* ------------------------------------------------------------ feedback -- */
.toolbar-feedback{font-size:12.5px;margin-left:12px}
.dev-note a{font-weight:600}