/* =========================================================
   Noescio — one stylesheet for the whole site.
   Change a colour or a font here and every page follows.
   ========================================================= */

/* ---------- 1. Design tokens ---------- */
:root{
  --background:#fbf9f5;
  --surface-lowest:#ffffff;
  --surface-low:#f5f3ef;
  --surface-variant:#e4e2de;
  --primary:#002440;
  --primary-container:#123a5c;
  --secondary:#974800;
  --secondary-container:#fc9349;
  --on-surface-variant:#42474e;
  --outline:#73777f;
  --outline-variant:#c3c7cf;
  --radius-lg:0.5rem;
  --radius-xl:0.75rem;

  /* simulation energy colours */
  --e-kinetic:#2e9e5b;
  --e-potential:#2a78d6;
  --e-thermal:#e0752a;
  --e-total:#5d6b7a;
}

/* ---------- 2. Base ---------- */
*{box-sizing:border-box}
body{margin:0;background:var(--background);color:var(--primary);
  font-family:"Hanken Grotesk",system-ui,-apple-system,sans-serif;
  font-size:16px;line-height:24px;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
.mono{font-family:"JetBrains Mono",ui-monospace,monospace;font-size:12px;
  line-height:16px;font-weight:500;letter-spacing:0.02em}

/* ---------- 3. Header, menu and footer (every page) ---------- */
  /* ---- site chrome, shared with the homepage ---- */
  .inner{max-width:1280px;margin:0 auto;padding:0 32px}
  .topbar{background:#fff;border-bottom:1px solid rgba(115,119,127,0.25)}
  .topbar .inner{display:flex;align-items:center;justify-content:space-between;height:56px}
  .brand{font-size:24px;line-height:32px;font-weight:600;letter-spacing:-0.01em;
    display:flex;align-items:center;gap:8px;color:#002440}
  .logo{width:28px;height:28px;display:block}
  .signin{background:#974800;color:#fff;border:0;border-radius:9999px;
    padding:8px 22px;font-family:inherit;font-size:14px;font-weight:500;cursor:pointer;transition:background .2s}
  .signin:hover{background:#7d3c00}
  .navbar{background:#fff;border-bottom:1px solid rgba(115,119,127,0.25)}
  .navbar .inner{display:flex;gap:32px;overflow-x:auto;scrollbar-width:none}
  .navbar .inner::-webkit-scrollbar{display:none}
  .navbar a{padding:11px 0;font-size:14px;font-weight:500;color:#42474e;text-decoration:none;
    border-bottom:2px solid transparent;white-space:nowrap;display:flex;align-items:center;gap:8px;transition:color .2s}
  .navbar a:hover{color:#974800}
  .navbar a.on{color:#974800;font-weight:700;border-bottom-color:#974800}
  .navbar svg{width:16px;height:16px;stroke:currentColor;fill:none;stroke-width:1.7}
  .crumb{font-size:12.5px;color:#6b7d90;margin:0 0 4px}
  .crumb a{color:#974800;text-decoration:none}
  .crumb a:hover{text-decoration:underline}
  .pagehead{margin:0 0 14px}
  .pagehead h1{font-size:32px;line-height:40px;font-weight:600;letter-spacing:-0.01em;color:#002440;margin:0 0 6px}
  .pagehead p{margin:0;color:#42474e;font-size:15px;max-width:70ch}
  .sitefoot{background:#e4e2de;border-top:1px solid #c3c7cf;padding:18px 0 24px;
    color:#42474e;font-size:13.5px;margin-top:26px}
  .sitefoot .inner{display:flex;justify-content:space-between;gap:18px;flex-wrap:wrap;align-items:center}
  .sitefoot a{color:#974800;text-decoration:none;margin-left:20px}
  @media(max-width:900px){
    .inner{padding:0 16px}
    .navbar .inner{gap:20px}
    .pagehead h1{font-size:24px;line-height:32px}
  }


/* ---------- 4. Home page ---------- */
/* rows 3 and 4 */
.row{padding:28px 0;border-bottom:1px solid rgba(195,199,207,0.5)}
.row .inner{display:grid;grid-template-columns:1fr 1.25fr;gap:40px;align-items:center}
.row.flip .inner{grid-template-columns:1.25fr 1fr}
.row.flip .copy{order:2}
.row.flip .homecard{order:1}

h1,h2{font-size:32px;line-height:40px;font-weight:600;letter-spacing:-0.01em;
  color:var(--primary);margin:0 0 12px}
.copy p{color:var(--on-surface-variant);margin:0 0 10px;font-size:16px;line-height:24px;max-width:42ch}
.copy p:last-child{margin-bottom:0}

.homecard{background:var(--surface-lowest);border:1px solid var(--surface-variant);
  border-radius:var(--radius-xl);padding:14px;
  box-shadow:0 10px 15px -3px rgba(0,36,64,0.05),0 4px 6px -2px rgba(0,36,64,0.02)}
.split{display:grid;grid-template-columns:1fr 190px;gap:16px;align-items:start}
canvas{width:100%;height:auto;display:block;touch-action:none;border-radius:var(--radius-lg)}
#sim{cursor:grab}#sim:active{cursor:grabbing}

.rlabel{display:flex;justify-content:space-between;color:var(--outline);margin-bottom:4px;gap:8px}
.rlabel b{color:var(--primary);font-weight:500;white-space:nowrap;min-width:38px;text-align:right}
.track{height:4px;background:var(--surface-variant);border-radius:9999px;overflow:hidden;margin-bottom:10px}
.fill{height:100%;width:0;border-radius:9999px}
.fill.ke{background:var(--secondary-container)}
.fill.pe{background:var(--primary-container)}
.ctrl{margin-bottom:11px}
.ctrl label{display:flex;justify-content:space-between;color:var(--outline);margin-bottom:4px}
.ctrl label b{color:var(--primary);font-weight:500;min-width:52px;text-align:right}
input[type=range]{width:100%;margin:0;accent-color:var(--secondary)}
.note{color:var(--on-surface-variant);font-size:12px;line-height:17px;margin:10px 0 0;
  border-top:1px solid var(--surface-variant);padding-top:9px;
  min-height:60px}
.note b{color:var(--primary);font-weight:600}
.hint{color:var(--outline);margin:5px 0 0;text-align:center;transition:opacity .4s}
.hint.gone{opacity:0}
.eqline{display:flex;justify-content:space-between;gap:10px;margin-top:8px;color:var(--outline)}
.eqline b{color:var(--primary);font-weight:500}


@media(max-width:880px){
  .row{padding:22px 0}
  .row .inner,.row.flip .inner{grid-template-columns:1fr;gap:20px}
  .row.flip .copy{order:1}.row.flip .homecard{order:2}
  .split{grid-template-columns:1fr;gap:12px}
  .inner{padding:0 20px}
  .navbar .inner{gap:20px}
  h1,h2{font-size:24px;line-height:32px}
  .note{min-height:77px}
}


/* ---------- 5. Simulations index ---------- */
.head{padding-top:30px;padding-bottom:20px}
.head h1{font-size:32px;line-height:40px;font-weight:600;letter-spacing:-0.01em;margin:0 0 8px}
.head p{margin:0;color:var(--on-surface-variant);max-width:66ch}

.filters{display:flex;gap:8px;flex-wrap:wrap;padding-bottom:20px}
.chip{border:1px solid var(--outline-variant);background:var(--surface-lowest);
  border-radius:9999px;padding:6px 15px;font-size:13.5px;font-weight:500;
  color:var(--on-surface-variant);cursor:pointer;transition:.15s}
.chip:hover{border-color:var(--secondary);color:var(--secondary)}
.chip.on{background:var(--secondary);border-color:var(--secondary);color:#fff}

.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;padding-bottom:40px}
.card{background:var(--surface-lowest);border:1px solid var(--surface-variant);
  border-radius:12px;overflow:hidden;display:flex;flex-direction:column;
  box-shadow:0 10px 15px -3px rgba(0,36,64,.05),0 4px 6px -2px rgba(0,36,64,.02);
  transition:transform .18s, box-shadow .18s}
.card:hover{transform:translateY(-3px);box-shadow:0 18px 28px -8px rgba(0,36,64,.14)}
.card.soon{opacity:.62;pointer-events:none}
.thumb{aspect-ratio:16/9;display:block;position:relative;overflow:hidden;
  background:linear-gradient(180deg,#eceae4,#f7f5f0);
  border-bottom:1px solid var(--surface-variant)}
.thumb img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;display:block}
.thumb svg{position:absolute;inset:0;width:100%;height:100%}
.body{padding:14px 15px 16px}
.tagrow{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:8px}
.tag{background:#f2efe9;color:var(--on-surface-variant);border-radius:6px;padding:2px 8px}
.tag.free{background:#e6f0e2;color:#3f6b38}
.card h2{font-size:18px;line-height:24px;font-weight:600;margin:0 0 5px;letter-spacing:-0.01em}
.card p{margin:0;color:var(--on-surface-variant);font-size:14px;line-height:20px}


@media(max-width:1000px){.grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:640px){
  .grid{grid-template-columns:1fr}
  .inner{padding:0 16px}
  .navbar .inner{gap:20px}
  .head h1{font-size:24px;line-height:32px}
}


/* ---------- 6. Simulation pages ----------
   Layout on wide screens: a navy title band across the top, the
   simulation on the left (it stays in view while you scroll), and
   the control and reading panels stacked in a column on the right.
   Below 1100px everything stacks: band, simulation, panels.
   Rules are scoped under .page so they win over the small
   per-page <style> blocks inside each simulation.               */

  .page{max-width:1320px; margin:0 auto; padding:20px 32px 10px}
  .page > .crumb{margin:0 0 10px; font-size:13.5px}

  /* title band */
  .page .pagehead{position:relative; overflow:hidden; margin:0 0 20px;
    padding:26px 32px 28px; border-radius:18px; color:#fff;
    background:
      radial-gradient(circle at 88% 18%, rgba(252,147,73,.28), rgba(252,147,73,0) 42%),
      radial-gradient(circle at 8% 120%, rgba(42,120,214,.30), rgba(42,120,214,0) 45%),
      linear-gradient(135deg,#123a5c 0%,#002440 70%);
    box-shadow:0 24px 40px -24px rgba(0,36,64,.55)}
  .page .pagehead::after{content:""; position:absolute; inset:0; pointer-events:none;
    background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),
                     linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
    background-size:28px 28px;
    -webkit-mask-image:linear-gradient(90deg,transparent 35%,#000 100%);
            mask-image:linear-gradient(90deg,transparent 35%,#000 100%)}
  .page .pagehead > *{position:relative; z-index:1}
  .page .pagehead h1{color:#fff; font-size:38px; line-height:46px; font-weight:700;
    letter-spacing:-0.015em; margin:0 0 10px}
  .page .pagehead p{color:#d3e0eb; font-size:17px; line-height:28px; max-width:70ch; margin:0}
  .page .pagehead p b,.page .pagehead p strong{color:#fff}

  .eyebrow{display:flex; align-items:center; flex-wrap:wrap; gap:10px; margin:0 0 12px;
    font-family:"JetBrains Mono",ui-monospace,monospace; font-size:12.5px; line-height:18px;
    letter-spacing:.06em; text-transform:uppercase; color:#fcb07a}
  .eyebrow .simtag{color:#fc9349; border:1px solid rgba(252,147,73,.55);
    background:rgba(252,147,73,.14); border-radius:9999px; padding:3px 11px}
  .eyebrow .freetag{color:#2f5429; background:#dff0d8; border-radius:9999px; padding:3px 11px}

  /* the simulation itself */
  .simmain{min-width:0}
  .simstage{position:relative; height:min(62vh,560px);
    border:1px solid #d8dde3; border-radius:16px; overflow:hidden; background:#cfe8f7;
    box-shadow:0 22px 40px -22px rgba(0,36,64,.35), 0 2px 6px rgba(0,36,64,.05)}
  .simstage #cv{position:absolute; inset:0; width:100%; height:100%; display:block; touch-action:none; cursor:crosshair}

  /* "Try this" prompts under the simulation */
  .page .tips{display:flex; flex-wrap:wrap; align-items:center; gap:8px; margin:14px 0 0;
    font-size:14px; line-height:20px; color:#33404f}
  .page .tips::before{content:"Try this"; font-family:"JetBrains Mono",ui-monospace,monospace;
    font-size:12px; letter-spacing:.08em; text-transform:uppercase; font-weight:600;
    color:#fff; background:#974800; border-radius:9999px; padding:6px 12px}
  .page .tips span{background:#fff; border:1px solid #e4e2de; border-radius:9999px; padding:6px 13px}
  .page .tips b{font-weight:700; color:#974800}

  /* transport bar: play, reset, status */
  .dock{margin-top:14px}
  .page .dock .panel{display:flex; align-items:center; gap:10px; flex-wrap:wrap;
    padding:12px 14px; font-size:14.5px; color:#33404f}
  .dock .sep{width:1px; height:24px; background:rgba(15,27,38,.14)}
  .dock .spacer{flex:1}

  /* control and reading panels */
  .panels{display:grid; grid-template-columns:repeat(auto-fit,minmax(300px,1fr)); gap:16px; margin-top:16px}

  .panel{background:#fff; border:1px solid #e4e2de; border-radius:16px; padding:18px 18px;
    box-shadow:0 12px 22px -14px rgba(0,36,64,.18)}
  .page .panel{font-size:14.5px; line-height:22px; color:#33404f}
  .page .panel p{font-size:14.5px; line-height:23px}
  .page .panel h2{display:flex; align-items:center; gap:9px; margin:0 0 14px;
    font-size:13px; line-height:18px; font-weight:700; letter-spacing:.09em;
    text-transform:uppercase; color:#974800}
  .page .panel h2::before{content:""; width:9px; height:9px; border-radius:3px;
    background:#fc9349; flex:none}

  /* energy bars */
  .bar-row{display:grid; grid-template-columns:78px 1fr 70px; align-items:center; gap:10px; margin-bottom:8px}
  .bar-row:last-of-type{margin-bottom:0}
  .bar-row.total{margin-top:10px; padding-top:10px; border-top:1px solid rgba(15,27,38,.12)}
  .page .bar-label{display:flex; align-items:center; gap:7px; font-size:13.5px; color:#33404f}
  .swatch{width:10px; height:10px; border-radius:3px; flex:none}
  .bar-track{height:14px; background:rgba(15,27,38,.07); border-radius:5px; overflow:hidden}
  .bar-fill{height:100%; width:0; border-radius:5px; transition:width .08s linear}
  .page .bar-val{font-size:13.5px; text-align:right; font-variant-numeric:tabular-nums; color:#0f1b26; font-weight:600}

  /* read-outs */
  .ro-row{display:grid; grid-template-columns:repeat(auto-fit,minmax(84px,1fr)); gap:8px; margin-top:12px;
    padding-top:12px; border-top:1px solid rgba(15,27,38,.12)}
  .page .ro{background:#f6f4ef; border:1px solid #ece9e2; border-radius:11px; padding:8px 11px}
  .page .ro .k{font-size:11px; letter-spacing:.06em; text-transform:uppercase; color:#5d6b7a}
  .page .ro .v{font-size:16.5px; line-height:24px; font-weight:700; font-variant-numeric:tabular-nums; color:#002440}

  select{width:100%; padding:9px 11px; font:inherit; font-size:14.5px; border-radius:10px;
    border:1px solid rgba(15,27,38,.18); background:#fff; color:#0f1b26}
  .checks{display:flex; flex-direction:column; gap:8px; margin-top:12px}
  .page .checks label{display:flex; align-items:flex-start; gap:9px; font-size:14px; line-height:20px; color:#33404f; cursor:pointer}
  .checks input{margin:3px 0 0; accent-color:#974800}

  .field{margin-top:14px}
  .field:first-child{margin-top:0}
  .page .field label{display:flex; justify-content:space-between; gap:8px; font-size:14px; line-height:20px; color:#42474e; margin-bottom:7px}
  .page .field label b{color:#002440; font-weight:700; font-size:14.5px; font-variant-numeric:tabular-nums}
  input[type=range]{width:100%; margin:0; accent-color:#974800}
  .page input[type=range]{accent-color:#974800; height:22px}

  .btnrow{display:flex; gap:8px; flex-wrap:wrap}
  button{font:inherit; font-size:14px; padding:8px 15px; border-radius:10px; cursor:pointer;
    border:1px solid rgba(15,27,38,.18); background:#fff; color:#0f1b26; transition:.15s}
  button:hover{border-color:#974800; color:#974800}
  button.primary{background:#974800; color:#fff; border-color:#974800; min-width:86px; font-weight:600}
  button.primary:hover{background:#7d3c00; border-color:#7d3c00; color:#fff}
  button.seg{padding:7px 12px; font-size:13.5px}
  button.seg[aria-pressed="true"]{background:#002440; color:#fff; border-color:#002440}
  .hint{font-size:13.5px; color:#5d6b7a; margin-top:10px; line-height:1.55}
  .page .hint{font-size:13.5px; line-height:21px; color:#42474e}

  /* wide screens: simulation left, panels right */
  @media (min-width:1100px){
    .page{display:grid; grid-template-columns:minmax(0,1fr) 400px; column-gap:22px; align-items:start}
    .page > .crumb, .page > .pagehead{grid-column:1 / -1}
    .page > .simmain{grid-column:1; position:sticky; top:16px}
    .page > .panels{grid-column:2; display:flex; flex-direction:column; gap:16px; margin-top:0}
    .page > .panels > .panel{width:100%}
  }

  @media (max-width:900px){
    .page{padding:14px 16px}
    .page .pagehead{padding:20px 18px 22px; border-radius:14px; margin-bottom:16px}
    .page .pagehead h1{font-size:28px; line-height:34px}
    .page .pagehead p{font-size:15.5px; line-height:25px}
    .simstage{height:50vh}
    .panels{grid-template-columns:1fr; gap:12px}
    .page .tips{font-size:13.5px}
  }


/* ---------- 7. Session pages ---------- */
/* Paste this block at the end of assets/style.css. One paste, and every
   session page in /sessions/ is styled. Nothing else to do per page.      */

  .session{max-width:760px;margin:0 auto;padding:22px 32px 10px}
  .session .meta{display:flex;gap:6px;flex-wrap:wrap;margin:10px 0 14px}
  .session .meta span{background:#f2efe9;color:var(--on-surface-variant);border-radius:6px;
    padding:3px 9px;font-family:"JetBrains Mono",ui-monospace,monospace;font-size:11.5px}
  .session .meta span.free{background:#e6f0e2;color:#3f6b38}

  .session h1{font-size:30px;line-height:38px;font-weight:600;letter-spacing:-.01em;margin:0 0 8px}
  .session .lede{font-size:17px;line-height:26px;color:#41536a;margin:0 0 4px}

  .session h2{font-size:21px;line-height:29px;font-weight:600;margin:30px 0 9px;letter-spacing:-.01em}
  .session p{font-size:16px;line-height:26px;color:#33404f;margin:0 0 13px}
  .session strong{color:#002440;font-weight:600}
  .session ul{margin:0 0 14px;padding-left:20px;color:#33404f}
  .session li{margin-bottom:6px;line-height:25px}

  /* ---- illustrations ---- */
  .fig{margin:4px 0 20px}
  .fig svg{display:block;width:100%;height:auto;border:1px solid var(--surface-variant);
    border-radius:12px;background:#fff;
    box-shadow:0 10px 15px -3px rgba(0,36,64,.04),0 4px 6px -2px rgba(0,36,64,.02)}
  .figcap{font-size:12.5px;line-height:19px;color:var(--outline);margin:8px 2px 0}
  .figcap b{color:var(--on-surface-variant);font-weight:600}

  /* a quiet aside: examples, curiosity boxes, cautions */
  .aside{background:var(--surface-low);border-left:3px solid var(--secondary-container);
    border-radius:0 10px 10px 0;padding:13px 16px;margin:0 0 16px}
  .aside h3{margin:0 0 6px;font-size:12px;font-weight:700;letter-spacing:.07em;
    text-transform:uppercase;color:var(--secondary)}
  .aside p:last-child{margin-bottom:0}

  /* link out to a simulation */
  .simlink{display:flex;align-items:center;gap:14px;background:#002440;color:#fff;
    border-radius:12px;padding:15px 18px;margin:0 0 20px;text-decoration:none}
  .simlink:hover{background:#123a5c}
  .simlink .ic{width:38px;height:38px;flex:none;border-radius:9999px;background:rgba(252,147,73,.18);
    display:flex;align-items:center;justify-content:center;font-size:19px}
  .simlink b{display:block;font-size:15px;font-weight:600;margin-bottom:2px}
  .simlink span{font-size:13px;color:#c3d3e2;line-height:19px}

  /* ask-before-you-explain box */
  .think{background:#fff;border:1px solid var(--surface-variant);border-radius:12px;
    padding:15px 17px;margin:0 0 18px;
    box-shadow:0 10px 15px -3px rgba(0,36,64,.04),0 4px 6px -2px rgba(0,36,64,.02)}
  .think .tq{font-weight:600;color:#002440;margin:0 0 10px}
  .think .rbtn{font:inherit;font-size:13px;font-weight:500;padding:7px 16px;border-radius:9999px;
    border:1px solid var(--outline-variant);background:#fff;color:var(--secondary);cursor:pointer}
  .think .rbtn:hover{border-color:var(--secondary)}
  .think .rtext{display:none;margin-top:11px;padding-top:11px;
    border-top:1px solid var(--surface-variant);color:#33404f;line-height:25px}

  /* small interactive widgets inside a session */
  .widget{background:#fff;border:1px solid var(--surface-variant);border-radius:14px;
    padding:17px 19px;margin:0 0 20px;
    box-shadow:0 10px 15px -3px rgba(0,36,64,.05),0 4px 6px -2px rgba(0,36,64,.02)}
  .widget h3{margin:0 0 12px;font-size:12px;font-weight:700;letter-spacing:.07em;
    text-transform:uppercase;color:var(--secondary)}
  .widget .wrow{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin-bottom:12px}
  .widget .wbtn{font:inherit;font-size:13px;padding:8px 15px;border-radius:9999px;
    border:1px solid var(--outline-variant);background:#fff;color:#41536a;cursor:pointer}
  .widget .wbtn[aria-pressed="true"]{background:var(--secondary);border-color:var(--secondary);color:#fff}
  .widget label{display:flex;justify-content:space-between;font-size:13px;color:#5d7186;margin-bottom:5px}
  .widget label b{color:#002440;font-weight:600;font-family:"JetBrains Mono",monospace}
  .widget input[type=range]{width:100%;margin:0;accent-color:var(--secondary)}
  .wout{border-top:1px solid var(--surface-variant);padding-top:13px;margin-top:13px}
  .wout .big{font-size:25px;line-height:32px;font-weight:700;color:#002440;font-variant-numeric:tabular-nums}
  .wout .sub{font-size:13.5px;line-height:20px;margin-top:5px;color:var(--on-surface-variant)}
  .wout .sub.bad{color:#c0392b;font-weight:600}
  .wout .sub.good{color:#3f6b38;font-weight:600}

  /* the question set */
  .qz{background:#fff;border:1px solid var(--surface-variant);border-radius:14px;
    padding:20px 22px;margin:34px 0 10px;
    box-shadow:0 10px 15px -3px rgba(0,36,64,.05),0 4px 6px -2px rgba(0,36,64,.02)}
  .qzhead{margin:0 0 4px!important;font-size:19px}
  .qzsub{color:var(--outline);font-size:14px;margin:0 0 6px}

  .q{border-top:1px solid var(--surface-variant);padding:16px 0 4px}
  .q:first-of-type{border-top:0;padding-top:8px}
  .qp{margin:0 0 10px;font-weight:500;color:#002440;line-height:25px}
  .qn{display:inline-block;min-width:22px;color:var(--outline)}
  .qhint{font-size:12px;color:var(--outline);margin:-6px 0 9px 22px}

  .opts{display:flex;flex-direction:column;gap:7px;margin-left:22px}
  .opt{text-align:left;font:inherit;font-size:14.5px;line-height:21px;padding:9px 13px;
    border-radius:10px;border:1px solid var(--outline-variant);background:#fff;color:#33404f;
    cursor:pointer;transition:.12s}
  .opt:hover{border-color:var(--secondary)}
  .opt.sel{border-color:var(--secondary);background:#fdf4ec;color:#002440}
  .opt.right{border-color:#3f6b38;background:#eaf3e7;color:#2f5429}
  .opt.wrong{border-color:#c0392b;background:#fbeceb;color:#8e2b20}

  .fibrow{display:flex;align-items:center;gap:10px;margin-left:22px;flex-wrap:wrap}
  .fibrow input{font:inherit;font-size:14.5px;padding:9px 12px;border-radius:10px;
    border:1px solid var(--outline-variant);background:#fff;color:#002440;min-width:230px}
  .fibrow input:focus{outline:0;border-color:var(--secondary)}
  .fibrow input.right{border-color:#3f6b38;background:#eaf3e7}
  .fibrow input.wrong{border-color:#c0392b;background:#fbeceb}
  .fibans{font-size:12.5px;color:#8e2b20}

  .sortlist{display:flex;flex-direction:column;gap:8px;margin-left:22px}
  .sortitem{display:flex;align-items:center;justify-content:space-between;gap:12px;
    border:1px solid var(--outline-variant);border-radius:10px;padding:8px 10px 8px 13px;background:#fff}
  .sortitem .sl{font-size:14.5px;color:#33404f;line-height:20px}
  .sortitem .sb{display:flex;gap:5px;flex:none}
  .sortitem .sb button{font:inherit;font-size:12.5px;padding:6px 12px;border-radius:9999px;
    border:1px solid var(--outline-variant);background:#fff;color:#5d7186;cursor:pointer}
  .sortitem .sb button.sel{background:var(--secondary);border-color:var(--secondary);color:#fff}
  .sortitem.right{border-color:#3f6b38;background:#f4f9f2}
  .sortitem.wrong{border-color:#c0392b;background:#fdf4f3}

  .why{display:none;margin:11px 0 2px 22px;padding:11px 13px;background:var(--surface-low);
    border-radius:10px;font-size:14px;line-height:22px;color:#41536a}
  .why b{color:#002440}

  .qzfoot{display:flex;align-items:center;gap:14px;margin-top:20px;
    padding-top:16px;border-top:1px solid var(--surface-variant)}
  .qcheck{font:inherit;font-size:14px;font-weight:500;padding:10px 24px;border-radius:9999px;
    border:0;background:var(--secondary);color:#fff;cursor:pointer}
  .qcheck:hover{background:#7d3c00}
  .qscore{display:none;font-size:13px;color:var(--on-surface-variant)}
  .qscore.allright{color:#3f6b38;font-weight:600}
  .qznote{font-size:12.5px;color:var(--outline);margin:12px 0 0}

  /* previous / next session */
  .sessnav{display:flex;justify-content:space-between;gap:12px;margin:26px 0 8px;flex-wrap:wrap}
  .sessnav a{font-size:13.5px;color:var(--secondary);font-weight:500}
  .sessnav a:hover{text-decoration:underline}

  @media(max-width:900px){
    .session{padding:14px 16px 8px}
    .session h1{font-size:24px;line-height:32px}
    .session h2{font-size:19px;line-height:27px}
    .qz{padding:16px 15px}
    .opts,.fibrow,.sortlist,.why,.qhint{margin-left:0}
    .sortitem{flex-direction:column;align-items:flex-start;gap:8px}
  }
  
 /* ---------- 8. Class and unit pages ---------- */
/* Paste this block at the very END of assets/style.css.
   If an older section 8 is already there, replace it with this one.   */

  .head .crumb{margin:0 0 10px}

  .unitwrap{display:flex;flex-direction:column;gap:10px;padding-bottom:26px}

  .unit{background:var(--surface-lowest);border:1px solid var(--surface-variant);
    border-radius:12px;overflow:hidden;
    box-shadow:0 10px 15px -3px rgba(0,36,64,.04),0 4px 6px -2px rgba(0,36,64,.02)}
  .unit.empty{background:#faf9f6;box-shadow:none;opacity:.74}

  .unithead{display:flex;align-items:flex-start;gap:14px;padding:15px 18px}
  .unit .unum{flex:none;width:34px;height:34px;border-radius:9px;background:var(--primary);
    color:#fff;display:flex;align-items:center;justify-content:center;
    font-size:14px;font-weight:500;line-height:1}
  .unit.empty .unum{background:var(--outline-variant);color:#5d7186}

  .utitle{display:block;min-width:0}
  .unit .unithead h2{margin:0 0 2px;font-size:18px;line-height:24px;font-weight:600;
    letter-spacing:-.01em;color:var(--primary)}
  .unit.empty .unithead h2{color:#5d7186;font-weight:500}
  .uline{display:block;font-size:13.5px;line-height:19px;
    color:var(--on-surface-variant);margin-bottom:5px}
  .umeta{display:block;color:var(--outline);font-size:11px;line-height:16px}

  .unitbody{border-top:1px solid var(--surface-variant);padding:2px 18px 10px}

  /* each session is its own row, one per line */
  .unit .sesrow{display:flex;align-items:flex-start;gap:12px;
    padding:12px 0;border-bottom:1px solid #f1efeb;text-decoration:none}
  .unit .sesrow:last-child{border-bottom:0}
  .unit .sesno{flex:none;min-width:30px;padding-top:2px;
    color:var(--secondary);font-size:12px;line-height:18px}
  .unit .sestext{display:block;min-width:0}
  .unit .sestext b{display:block;font-size:15px;font-weight:600;
    color:var(--primary);line-height:21px;margin-bottom:2px}
  .unit .sestext span{display:block;font-size:13px;line-height:19px;
    color:var(--on-surface-variant)}
  .unit .sesrow:hover{background:#fdfcfa}
  .unit .sesrow:hover .sestext b{color:var(--secondary)}

  @media(max-width:640px){
    .unithead{padding:13px 14px;gap:11px}
    .unitbody{padding:2px 14px 10px}
    .unit .unithead h2{font-size:16px;line-height:22px}
    .unit .sesno{min-width:26px}
  }
  /* ---- add these lines to the END of section 8 in assets/style.css ----
   (the empty-subject "coming soon" box)                                 */

  .comingsoon{display:flex;align-items:flex-start;gap:16px;
    background:var(--surface-low);border:1px solid var(--surface-variant);
    border-radius:12px;padding:20px 22px;max-width:620px}
  .comingsoon .csicon{font-size:26px;flex:none;line-height:1.2}
  .comingsoon b{display:block;font-size:16px;color:var(--primary);margin-bottom:4px}
  .comingsoon p{margin:0;font-size:14px;line-height:21px;color:var(--on-surface-variant)}
  .comingsoon a{color:var(--secondary);font-weight:500}
  .comingsoon a:hover{text-decoration:underline}
/* ---------- 9. Pagination (simulations and sessions lists) ---------- */
  .pager{display:flex;align-items:center;justify-content:center;gap:10px;
    flex-wrap:wrap;padding:0 0 44px;margin-top:-12px}
  .pg{font-size:14px;font-weight:500;padding:8px 16px;border-radius:9999px;
    border:1px solid var(--outline-variant);background:var(--surface-lowest);color:var(--secondary);transition:.15s}
  a.pg:hover{border-color:var(--secondary)}
  .pg.off{color:var(--outline-variant);cursor:default}
  .pgnums{display:flex;gap:6px}
  .pgn{min-width:38px;height:38px;display:inline-flex;align-items:center;justify-content:center;
    border-radius:9999px;font-size:14px;font-weight:500;color:var(--on-surface-variant);
    border:1px solid var(--outline-variant);background:var(--surface-lowest);transition:.15s}
  a.pgn:hover{border-color:var(--secondary);color:var(--secondary)}
  .pgn.on{background:var(--secondary);border-color:var(--secondary);color:#fff}
  @media(max-width:640px){ .pg{padding:7px 12px;font-size:13px} .pgn{min-width:34px;height:34px} }