:root{
  --bg:#071018;
  --panel:#101c28;
  --panel2:#132536;
  --ink:#eef7ff;
  --muted:#b5c9d8;
  --line:#29465c;
  --accent:#e3342f;
  --accent2:#ffbd4a;
  --blue:#5cc8ff;
  --good:#57d68d;
  --warn:#ffd166;
  --shadow:0 18px 55px rgba(0,0,0,.35);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:Inter,Segoe UI,Roboto,Arial,sans-serif;
  color:var(--ink);
  background:
    radial-gradient(circle at top left,rgba(227,52,47,.24),transparent 34rem),
    radial-gradient(circle at top right,rgba(92,200,255,.20),transparent 28rem),
    linear-gradient(180deg,#050a0f,#071018 35%,#0b1320);
  line-height:1.65;
}
a{color:#8bddff;text-decoration:none}
a:hover{text-decoration:underline}
.skip{position:absolute;left:-999px;top:auto}
.skip:focus{left:1rem;top:1rem;background:#fff;color:#000;padding:.65rem;border-radius:.5rem;z-index:99}
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(7,16,24,.92);
  backdrop-filter:blur(12px);
  border-bottom:1px solid rgba(255,255,255,.08);
}
.nav-wrap{max-width:1180px;margin:0 auto;padding:.9rem 1rem;display:flex;gap:1rem;align-items:center;justify-content:space-between;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:.75rem;color:var(--ink);font-weight:900;letter-spacing:.02em}
.brand-badge{display:inline-grid;place-items:center;width:42px;height:42px;border-radius:12px;background:linear-gradient(135deg,var(--accent),#8c1619);box-shadow:0 0 0 2px rgba(255,255,255,.09) inset;color:#fff;font-weight:1000}
.brand span{display:block;font-size:.8rem;color:var(--muted);font-weight:700;letter-spacing:.08em;text-transform:uppercase}
.nav-links{display:flex;gap:.6rem;flex-wrap:wrap}
.nav-links a,.pill{border:1px solid rgba(255,255,255,.12);background:rgba(255,255,255,.055);padding:.55rem .78rem;border-radius:999px;color:var(--ink);font-size:.92rem}
.hero{max-width:1180px;margin:0 auto;padding:4.2rem 1rem 2rem;display:grid;grid-template-columns:minmax(0,1.3fr) minmax(280px,.7fr);gap:1.5rem;align-items:stretch}
.hero-card,.lesson-card,.toc-card,.resource-card{background:linear-gradient(180deg,rgba(19,37,54,.94),rgba(16,28,40,.94));border:1px solid rgba(255,255,255,.12);border-radius:24px;box-shadow:var(--shadow)}
.hero-card{padding:2rem}
.eyebrow{color:var(--accent2);font-size:.82rem;font-weight:900;text-transform:uppercase;letter-spacing:.14em;margin:0 0 .5rem}
h1{font-size:clamp(2.1rem,5vw,4.7rem);line-height:.98;margin:.25rem 0 1rem;letter-spacing:-.04em}
.subtitle{font-size:1.18rem;color:var(--muted);max-width:70ch}
.notice{border-left:5px solid var(--accent2);background:rgba(255,189,74,.10);padding:1rem;border-radius:16px;margin:1.25rem 0;color:#fff3d5}
.hero-side{padding:1.4rem;display:flex;flex-direction:column;gap:1rem;justify-content:center}
.stat{padding:1rem;border-radius:18px;background:rgba(255,255,255,.055);border:1px solid rgba(255,255,255,.08)}
.stat strong{display:block;font-size:1.5rem;color:#fff}
.stat span{display:block;color:var(--muted);font-size:.94rem}
main{max-width:1180px;margin:0 auto;padding:1rem 1rem 4rem}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(255px,1fr));gap:1rem}
.lesson-link{display:block;background:linear-gradient(180deg,rgba(19,37,54,.95),rgba(11,20,31,.95));border:1px solid rgba(255,255,255,.11);border-radius:20px;padding:1rem;color:var(--ink);min-height:230px;box-shadow:var(--shadow)}
.lesson-link:hover{transform:translateY(-2px);text-decoration:none;border-color:rgba(92,200,255,.6)}
.lesson-number{display:inline-block;color:#071018;background:var(--accent2);font-weight:1000;border-radius:999px;padding:.12rem .55rem;font-size:.78rem;margin-bottom:.7rem}
.lesson-link h2{font-size:1.2rem;line-height:1.18;margin:.2rem 0 .5rem}
.lesson-link p{color:var(--muted);margin:.35rem 0}
.tags{display:flex;gap:.35rem;flex-wrap:wrap;margin-top:.8rem}
.tag{font-size:.76rem;color:#dff7ff;border:1px solid rgba(92,200,255,.25);background:rgba(92,200,255,.08);padding:.18rem .48rem;border-radius:999px}
.searchbar{display:flex;gap:.7rem;flex-wrap:wrap;margin:1.5rem 0}
.searchbar input{flex:1;min-width:250px;border:1px solid rgba(255,255,255,.16);background:#08131d;color:var(--ink);padding:.9rem 1rem;border-radius:14px;font-size:1rem}
.searchbar button{border:0;background:var(--accent);color:white;font-weight:900;padding:.9rem 1rem;border-radius:14px;cursor:pointer}
.lesson-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:1rem;align-items:start}
.lesson-hero{padding:2.4rem 0 1rem}
.lesson-hero h1{font-size:clamp(2rem,4.5vw,4rem)}
.lesson-card{padding:1.35rem;margin-bottom:1rem}
.lesson-card h2{margin-top:0;font-size:1.55rem;line-height:1.15}
.lesson-card h3{margin-bottom:.25rem;color:#fff}
ul,ol{padding-left:1.35rem}
li{margin:.38rem 0}
.callout{border:1px solid rgba(255,189,74,.35);background:rgba(255,189,74,.08)}
.redflag{border:1px solid rgba(227,52,47,.45);background:rgba(227,52,47,.12)}
.good{border:1px solid rgba(87,214,141,.35);background:rgba(87,214,141,.08)}
.side{position:sticky;top:88px;display:flex;flex-direction:column;gap:1rem}
.toc-card,.resource-card{padding:1rem}
.toc-card h2,.resource-card h2{font-size:1rem;margin:0 0 .5rem;color:#fff}
.toc-card a{display:block;padding:.35rem 0;border-bottom:1px solid rgba(255,255,255,.08);color:var(--muted)}
.quiz li strong{color:#fff}
.answer{color:#d9f8df;background:rgba(87,214,141,.09);padding:.65rem;border-radius:12px;margin-top:.4rem}
.footer{border-top:1px solid rgba(255,255,255,.1);background:#050a0f;color:var(--muted);padding:2rem 1rem;text-align:center}
.footer a{margin:0 .45rem;display:inline-block}
.print-link{display:inline-block;margin-top:.8rem;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.14);padding:.65rem .85rem;border-radius:12px;color:#fff}
@media (max-width:860px){.hero{grid-template-columns:1fr;padding-top:2.4rem}.lesson-layout{grid-template-columns:1fr}.side{position:static}.nav-wrap{align-items:flex-start}.nav-links{width:100%}}
@media print{body{background:#fff;color:#000}.site-header,.side,.footer,.searchbar,.print-link{display:none}.lesson-card,.hero-card{box-shadow:none;border:1px solid #ddd;background:#fff;color:#000}.lesson-layout{display:block}a{color:#000}}
.readaloud{position:fixed;right:16px;bottom:16px;z-index:80;display:flex;align-items:center;gap:8px;flex-wrap:wrap;max-width:min(460px,calc(100vw - 32px));padding:10px 12px;border:1px solid rgba(255,255,255,.14);border-radius:18px;background:rgba(7,16,24,.94);box-shadow:var(--shadow);backdrop-filter:blur(12px)}
.readaloud strong{font-size:.82rem;color:#fff}
.readaloud span{font-size:.78rem;color:var(--muted)}
.readaloud button{border:1px solid rgba(255,255,255,.14);background:rgba(255,255,255,.08);color:#fff;border-radius:999px;padding:.38rem .65rem;font-weight:900;cursor:pointer}
.readaloud button:hover{background:rgba(255,255,255,.14)}
@media (max-width:700px){.readaloud{left:10px;right:10px;bottom:10px;justify-content:center}.readaloud strong,.readaloud span{width:100%;text-align:center}}
@media print{.readaloud{display:none}}