/* =========================================================================
   A1 ARENA — the public reading pages.

   Deliberately separate from styles.css. These pages have no app shell, no
   JavaScript and no sign-in, and a student may arrive on one straight from
   a search result on a weak connection. Keeping them off the 45KB app
   stylesheet means the page paints immediately.

   Same palette as the app, so arriving in the app afterwards feels like the
   same place.
   ========================================================================= */
:root {
  --bg: #06120d;
  --card: #0e2118;
  --card2: #12291f;
  --soft: #12291f;
  --soft2: #0a1c14;
  --line: #1d3b2c;
  --ink: #eaf6ef;
  --ink2: #a8c4b4;
  --ink3: #8aa89a;
  --green: #22c55e;
  --gold: #fbbf24;
  --read: 1.04rem;
  --read-lh: 1.7;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  overflow-wrap: break-word;
}
a { color: var(--green); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ---------------------------------------------------------------- header */
header.site {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 16px;
  border-bottom: 1px solid var(--line);
  background: rgba(8, 20, 15, .9);
  position: sticky;
  top: 0;
  backdrop-filter: blur(10px);
  z-index: 10;
}
header.site .brand {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  color: var(--ink);
  font-weight: 700;
}
header.site .brand:hover { text-decoration: none; }
.mark {
  display: grid;
  place-items: center;
  width: 30px; height: 30px;
  border-radius: 9px;
  background: #0d2b1f;
  border: 1px solid var(--line);
  color: var(--gold);
  font-size: .78rem;
  font-weight: 800;
  letter-spacing: .03em;
}
header.site .cta {
  padding: 8px 14px;
  border-radius: 10px;
  background: var(--green);
  color: #04150c;
  font-weight: 650;
  font-size: .88rem;
  white-space: nowrap;
}
header.site .cta:hover { text-decoration: none; filter: brightness(1.08); }

/* ----------------------------------------------------------------- main */
main {
  max-width: 44rem;
  margin: 0 auto;
  padding: 22px 16px 56px;
}

.crumbs { font-size: .82rem; color: var(--ink2); margin-bottom: 18px; }
.crumbs i { font-style: normal; margin: 0 7px; color: var(--ink3); }
.crumbs span { color: var(--ink2); }

h1 {
  font-size: 1.72rem;
  line-height: 1.22;
  letter-spacing: -.012em;
  margin: 0 0 8px;
}
h2 {
  font-size: 1.1rem;
  margin: 34px 0 12px;
  letter-spacing: -.005em;
}
.kicker {
  margin: 0 0 20px;
  font-size: .84rem;
  color: var(--gold);
  letter-spacing: .03em;
}
.lede {
  font-size: 1.1rem;
  line-height: 1.6;
  color: var(--ink2);
  padding-left: 14px;
  border-left: 3px solid var(--gold);
  margin: 0 0 26px;
}
p { margin: 0 0 14px; font-size: var(--read); line-height: var(--read-lh); }

ul.points { padding-left: 20px; margin: 0; }
ul.points li {
  margin-bottom: 11px;
  font-size: var(--read);
  line-height: var(--read-lh);
}
ul.points li::marker { color: var(--green); }

/* --------------------------------------------------------------- panels */
.panel {
  margin: 22px 0;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--soft);
}
.panel h2 {
  margin: 0 0 12px;
  font-size: .74rem;
  letter-spacing: .09em;
  text-transform: uppercase;
  color: var(--gold);
}
.panel dl { margin: 0; }
.panel dt { font-weight: 700; margin-top: 13px; }
.panel dt:first-child { margin-top: 0; }
.panel dd { margin: 3px 0 0; color: var(--ink2); line-height: var(--read-lh); }

ul.formulae { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
ul.formulae code {
  display: block;
  padding: 8px 11px;
  background: var(--soft2);
  border: 1px solid var(--line);
  border-radius: 8px;
  font-size: .94rem;
  overflow-x: auto;
}

.worked + .worked { margin-top: 16px; padding-top: 16px; border-top: 1px dashed var(--line); }
.worked .wq { font-weight: 600; margin: 0 0 9px; }
.worked ol { margin: 0 0 9px; padding-left: 1.25rem; color: var(--ink2); }
.worked ol li { margin: 6px 0; line-height: var(--read-lh); }
.worked .wa { margin: 0; }
.worked .wa strong { color: var(--green); }

.trap {
  margin: 22px 0;
  padding: 14px 16px;
  border-radius: 12px;
  background: rgba(251, 191, 36, .09);
  border: 1px solid rgba(251, 191, 36, .3);
}
.trap h2 { margin: 0 0 7px; font-size: .74rem; letter-spacing: .09em; text-transform: uppercase; color: var(--gold); }
.trap p { margin: 0; }
.panel.tip { background: rgba(251, 191, 36, .07); border-color: rgba(251, 191, 36, .26); }

.extract { background: var(--soft2); border-color: rgba(251, 191, 36, .26); }
.verse {
  white-space: pre-wrap;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.06rem;
  line-height: 1.72;
  margin: 0;
  color: var(--ink);
}

/* ---------------------------------------------------------------- cards */
ul.cards { list-style: none; margin: 0 0 10px; padding: 0; display: grid; gap: 10px; }
@media (min-width: 620px) { ul.cards { grid-template-columns: 1fr 1fr; } }
ul.cards a {
  display: block;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: linear-gradient(180deg, var(--card), var(--card2));
  color: var(--ink);
  height: 100%;
}
ul.cards a:hover { text-decoration: none; border-color: var(--green); }
ul.cards strong { display: block; font-size: 1rem; line-height: 1.3; margin-bottom: 4px; }
ul.cards span { display: block; color: var(--ink2); font-size: .86rem; line-height: 1.45; }

/* ------------------------------------------------------------------ cta */
.cta-box {
  margin: 36px 0 10px;
  padding: 20px;
  border: 1px solid var(--green);
  border-radius: 14px;
  background: rgba(34, 197, 94, .07);
}
.cta-box h2 { margin: 0 0 8px; font-size: 1.08rem; color: var(--ink); text-transform: none; letter-spacing: 0; }
.cta-box p { color: var(--ink2); margin-bottom: 15px; }
.btn {
  display: inline-block;
  padding: 11px 20px;
  border-radius: 11px;
  background: var(--green);
  color: #04150c;
  font-weight: 700;
}
.btn:hover { text-decoration: none; filter: brightness(1.08); }

nav.more { margin-top: 34px; }
nav.more ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 7px; }
nav.more li a { font-size: .95rem; }

/* --------------------------------------------------------------- footer */
footer.site {
  border-top: 1px solid var(--line);
  padding: 22px 16px 34px;
  text-align: center;
  color: var(--ink2);
}
footer.site p { font-size: .86rem; margin: 0 0 7px; }
footer.site strong { color: var(--ink); }