/* learn.css — shared styles for the Paperex Learn section (educational content pages).
   Standalone from the trading terminal: readable long-form layout, same dark palette. */
:root {
  --bg: #070a0e;
  --panel: #0f141a;
  --panel-2: #151b23;
  --line: #1d242d;
  --line-2: #2a323d;
  --txt: #e2e8f0;
  --muted: #8a94a1;
  --up: #16c784;
  --down: #ea3943;
  --gold: #e8b339;
  --gold-soft: rgba(232, 179, 57, .14);
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans KR", sans-serif;
  --mono: "SF Mono", ui-monospace, "JetBrains Mono", Menlo, Consolas, monospace;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0; background: var(--bg); color: var(--txt);
  font-family: var(--sans); font-size: 16px; line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--gold); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ── top nav ── */
.lnav {
  position: sticky; top: 0; z-index: 10;
  display: flex; align-items: center; gap: 16px;
  padding: 12px 22px; background: rgba(10, 13, 18, .9); backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.lbrand { display: flex; align-items: center; gap: 9px; font-weight: 800; font-size: 18px; color: var(--txt); }
.lbrand i { color: var(--gold); font-style: normal; }
.lbrand .mark {
  width: 26px; height: 26px; border-radius: 7px; display: grid; place-items: center;
  background: linear-gradient(135deg, var(--gold), #b9831f); color: #0b0e11; font-weight: 900; font-size: 15px;
}
.lnav .spacer { flex: 1; }
.lnav a.navlink { color: var(--muted); font-size: 14px; font-weight: 600; }
.lnav a.navlink:hover { color: var(--txt); text-decoration: none; }
.lnav a.cta {
  background: var(--gold); color: #0b0e11; font-weight: 700; font-size: 13.5px;
  padding: 8px 14px; border-radius: 7px;
}
.lnav a.cta:hover { filter: brightness(1.06); text-decoration: none; }

/* ── layout ── */
.wrap { max-width: 820px; margin: 0 auto; padding: 0 22px; }
.crumbs { font-size: 13px; color: var(--muted); margin: 26px 0 8px; }
.crumbs a { color: var(--muted); } .crumbs a:hover { color: var(--txt); }

article h1, .hero h1 { font-size: 34px; line-height: 1.2; margin: 10px 0 14px; letter-spacing: -.02em; }
article h2 { font-size: 23px; margin: 38px 0 12px; letter-spacing: -.01em; }
article h3 { font-size: 18px; margin: 26px 0 8px; }
article p, article li { color: #cdd6e0; }
article ul, article ol { padding-left: 22px; }
article li { margin: 6px 0; }
.lead { font-size: 18px; color: var(--muted); margin: 0 0 24px; }
.tag { display: inline-block; font-size: 12px; font-weight: 700; text-transform: uppercase; letter-spacing: .05em;
  color: var(--gold); background: var(--gold-soft); padding: 3px 9px; border-radius: 5px; }
strong { color: #fff; }
code { font-family: var(--mono); font-size: 14px; background: var(--panel-2); border: 1px solid var(--line);
  padding: 1px 6px; border-radius: 4px; color: var(--gold); }
.callout {
  border: 1px solid var(--line-2); background: var(--panel); border-left: 3px solid var(--gold);
  border-radius: 8px; padding: 14px 16px; margin: 22px 0; font-size: 15px; color: #cdd6e0;
}
.callout b { color: var(--gold); }
hr { border: 0; border-top: 1px solid var(--line); margin: 34px 0; }

/* ── hero / hub ── */
.hero { text-align: center; padding: 54px 22px 10px; }
.hero .lead { max-width: 640px; margin: 0 auto 8px; }
.grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 16px; margin: 30px 0 10px;
}
.card {
  display: block; background: var(--panel); border: 1px solid var(--line); border-radius: 12px;
  padding: 20px; transition: border-color .15s, transform .15s, background .15s;
}
.card:hover { border-color: var(--gold); background: var(--panel-2); text-decoration: none; transform: translateY(-2px); }
.card h3 { margin: 0 0 7px; font-size: 17px; color: var(--txt); }
.card p { margin: 0; font-size: 14px; color: var(--muted); line-height: 1.55; }

/* ── glossary ── */
.gterm { border-bottom: 1px solid var(--line); padding: 18px 0; }
.gterm dt { font-weight: 800; font-size: 17px; color: var(--txt); margin-bottom: 5px; }
.gterm dd { margin: 0; color: #cdd6e0; }

/* ── related + cta ── */
.related { margin: 40px 0 0; }
.related h2 { font-size: 17px; color: var(--muted); text-transform: uppercase; letter-spacing: .05em; }
.trybox {
  margin: 44px 0; padding: 28px; text-align: center;
  background: radial-gradient(120% 100% at 50% 0%, rgba(232,179,57,.10), transparent 60%), var(--panel);
  border: 1px solid var(--line-2); border-radius: 14px;
}
.trybox h2 { margin: 0 0 6px; font-size: 22px; }
.trybox p { margin: 0 0 16px; color: var(--muted); }
.trybox a.cta {
  display: inline-block; background: var(--gold); color: #0b0e11; font-weight: 800; font-size: 15px;
  padding: 12px 22px; border-radius: 9px;
}
.trybox a.cta:hover { filter: brightness(1.06); text-decoration: none; }

/* ── footer ── */
footer.lfoot {
  margin-top: 50px; border-top: 1px solid var(--line); padding: 26px 22px; color: var(--muted); font-size: 13px;
}
footer.lfoot .wrap { display: flex; flex-wrap: wrap; gap: 14px 22px; align-items: center; }
footer.lfoot a { color: var(--muted); } footer.lfoot a:hover { color: var(--txt); }
footer.lfoot .disc { flex: 1 1 100%; line-height: 1.5; margin-top: 8px; }

@media (max-width: 560px) {
  body { font-size: 15px; }
  article h1, .hero h1 { font-size: 27px; }
  .lnav { padding: 10px 14px; gap: 10px; }
  .lnav .navlink.opt { display: none; }
}