/* THE AMERICAN STORY — shared shell (Academy history wing)
   Palette: warm night + parchment. Fonts: Fraunces (display) + Space Grotesk (body). */
:root{
  --bg:#0e0c14; --bg2:#161022;
  --fg:#f4eee2; --muted:#a99c88;
  --amber:#f5b544; --clay:#e2725b; --sage:#8ecf9e; --sky:#7fd1e8; --violet:#a78bfa;
  --line:rgba(214,182,134,.20);
  --panel:rgba(24,19,34,.78);
  --maxw:960px;
  --hd:"Fraunces",Georgia,serif;
  --bd:"Space Grotesk",system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--fg);font-family:var(--bd);line-height:1.62;overflow-x:hidden;
  font-size:clamp(16px,1.05vw + 13px,19px)}
h1,h2,h3{font-family:var(--hd);letter-spacing:.005em;line-height:1.12;font-weight:600}
a{color:var(--amber)}
button{font-family:var(--bd);cursor:pointer}
img,svg{max-width:100%}

/* ---------- backdrop ---------- */
#glow{position:fixed;inset:-15% -10% auto -10%;height:130vh;z-index:-1;pointer-events:none;opacity:.85;
  background:
    radial-gradient(58% 40% at 16% 18%, rgba(245,181,68,.13), transparent 62%),
    radial-gradient(52% 40% at 84% 26%, rgba(226,114,91,.13), transparent 62%),
    radial-gradient(48% 38% at 52% 76%, rgba(127,209,232,.09), transparent 62%);
  animation:drift 36s ease-in-out infinite alternate}
@keyframes drift{from{transform:translate3d(-2%,-1%,0)}to{transform:translate3d(3%,2%,0) scale(1.05)}}
@media(prefers-reduced-motion:reduce){#glow{animation:none}}

/* ---------- top bar ---------- */
header.bar{position:sticky;top:0;z-index:40;display:flex;align-items:center;gap:10px;
  padding:9px clamp(12px,3vw,26px);background:rgba(14,12,20,.92);backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line)}
.bar .brand{font-family:var(--hd);font-size:clamp(13px,2.4vw,16px);letter-spacing:.02em;display:flex;
  align-items:center;gap:10px;flex:1;min-width:0;color:var(--fg);text-decoration:none;font-weight:600}
.bar .brand .glyph{width:26px;height:26px;flex:0 0 auto}
.bar .brand small{display:block;font-family:var(--bd);font-size:9.5px;letter-spacing:.26em;
  color:var(--muted);margin-top:1px;text-transform:uppercase}
.iconbtn{width:38px;height:38px;border-radius:12px;border:1px solid var(--line);background:var(--panel);
  color:var(--fg);font-size:16px;display:grid;place-items:center;transition:border-color .2s,transform .12s;flex:0 0 auto}
.iconbtn:active{transform:scale(.92)}
.iconbtn:hover{border-color:var(--amber)}
#progress{position:fixed;top:0;left:0;height:3px;width:0;z-index:60;
  background:linear-gradient(90deg,var(--amber),var(--clay),var(--sky));box-shadow:0 0 12px rgba(245,181,68,.5)}

/* ---------- layout ---------- */
main{max-width:var(--maxw);margin:0 auto;padding:0 clamp(14px,4vw,26px) 100px}
.wide{max-width:1120px}
section{margin:clamp(46px,8vw,86px) 0;scroll-margin-top:72px}
.eyebrow{font-size:11px;letter-spacing:.34em;text-transform:uppercase;color:var(--amber);font-weight:600}
h2{font-size:clamp(26px,4.6vw,42px);margin:12px 0 14px}
h3{font-size:clamp(19px,2.6vw,25px);margin:26px 0 8px}
p{margin:0 0 16px}
.lead{font-size:1.08em;color:#e9e0cf}
.muted{color:var(--muted)}
.card{border:1px solid var(--line);border-radius:20px;background:var(--panel);padding:clamp(18px,3vw,28px)}
.grid{display:grid;gap:16px}
.g2{grid-template-columns:repeat(auto-fit,minmax(260px,1fr))}
.g3{grid-template-columns:repeat(auto-fit,minmax(210px,1fr))}

/* ---------- hero ---------- */
.hero{text-align:center;padding:clamp(30px,7vw,64px) 0 6px}
.hero .kicker{font-size:11px;letter-spacing:.4em;text-transform:uppercase;color:var(--clay)}
.hero h1{font-size:clamp(34px,8vw,72px);margin:16px 0 0;
  background:linear-gradient(180deg,#fff8ea 8%,#f3d9a8 52%,#c99a63 100%);
  -webkit-background-clip:text;background-clip:text;color:transparent;-webkit-text-fill-color:transparent}
.hero .sub{max-width:640px;margin:18px auto 0;color:var(--muted);font-weight:300}

/* ---------- narration ---------- */
.speak{display:inline-flex;align-items:center;gap:8px;border:1px solid var(--line);background:rgba(245,181,68,.08);
  color:var(--amber);border-radius:999px;padding:10px 18px;min-height:40px;font-size:13.5px;font-weight:600;letter-spacing:.05em;
  transition:border-color .2s,background .2s,transform .12s}
.speak:hover{border-color:var(--amber)}
.speak:active{transform:scale(.96)}
.speak.playing{background:rgba(245,181,68,.2);border-color:var(--amber)}
.speak.playing .ico::after{content:"❚❚"}
.speak .ico::after{content:"▶"}
.speak[hidden]{display:none}

/* ---------- pills / chips ---------- */
.chips{display:flex;flex-wrap:wrap;gap:8px;margin:14px 0 0;padding:0;list-style:none}
.chip{font-size:12px;letter-spacing:.05em;border:1px solid var(--line);border-radius:999px;padding:5px 12px;
  color:var(--muted);background:rgba(255,255,255,.02)}

/* ---------- quiz ---------- */
.quiz .q{font-family:var(--hd);font-size:clamp(19px,2.6vw,24px);margin:0 0 16px}
.opts{display:grid;gap:10px}
.opt{text-align:left;border:1px solid var(--line);background:rgba(255,255,255,.03);color:var(--fg);
  border-radius:14px;padding:13px 16px;font-size:15.5px;transition:border-color .2s,background .2s,transform .12s}
.opt:hover:not(.locked){border-color:var(--amber);transform:translateX(3px)}
.opt.right{border-color:var(--sage);background:rgba(142,207,158,.14)}
.opt.wrong{border-color:var(--clay);background:rgba(226,114,91,.14)}
.fb{margin-top:14px;border-left:3px solid var(--amber);padding:8px 0 8px 14px;color:var(--muted);
  font-size:15px;display:none}
.fb.on{display:block;animation:fadeUp .35s ease both}
.qmeta{display:flex;justify-content:space-between;align-items:center;color:var(--muted);font-size:12px;
  letter-spacing:.16em;text-transform:uppercase;margin-bottom:14px}
@keyframes fadeUp{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}

/* ---------- reveal on scroll ---------- */
.rv{opacity:0;transform:translateY(22px);transition:opacity .7s ease,transform .7s cubic-bezier(.16,1,.3,1)}
.rv.in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){.rv{opacity:1;transform:none;transition:none}}

/* ---------- footer nav ---------- */
.nextnav{display:grid;gap:14px;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));margin-top:40px}
.nextnav a{display:block;border:1px solid var(--line);border-radius:18px;padding:18px 20px;text-decoration:none;
  color:var(--fg);background:var(--panel);transition:border-color .25s,transform .2s}
.nextnav a:hover{border-color:var(--amber);transform:translateY(-3px)}
.nextnav .lbl{font-size:11px;letter-spacing:.24em;text-transform:uppercase;color:var(--muted)}
.nextnav .ttl{font-family:var(--hd);font-size:19px;margin-top:6px}
footer.site{border-top:1px solid var(--line);margin-top:70px;padding:26px 0 0;color:var(--muted);font-size:13px;
  display:flex;flex-wrap:wrap;gap:14px;justify-content:space-between}
footer.site a{color:var(--muted);text-decoration:none}
footer.site a:hover{color:var(--amber)}