/* TradingPit Learn — shared styles */
:root {
  --bg:        #0d1117;
  --bg2:       #161b22;
  --bg3:       #1a1f2e;
  --border:    #30363d;
  --text:      #e5e7eb;
  --text2:     #9ca3af;
  --text3:     #64748b;
  --accent:    #2DD4BF;
  --gold:      #F5C451;
  --green:     #22C55E;
  --red:       #EF4444;
  --purple:    #A78BFA;
  --orange:    #F97316;
  --blue:      #60A5FA;
  --diag-bg:   #1a1a2e;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Top nav */
.tp-nav {
  background: var(--bg2);
  border-bottom: 1px solid var(--border);
  padding: 14px 28px;
  display: flex; align-items: center; gap: 28px;
  position: sticky; top: 0; z-index: 100;
}
.tp-nav-logo {
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  font-size: 18px; font-weight: 700;
  color: var(--gold); text-decoration: none; letter-spacing: 1px;
}
.tp-nav-logo:hover { text-decoration: none; color: var(--gold); }
.tp-nav-links { display: flex; gap: 24px; flex: 1; }
.tp-nav-links a {
  color: var(--text2); font-size: 14px; font-weight: 500;
  text-decoration: none;
}
.tp-nav-links a:hover, .tp-nav-links a.active { color: var(--text); }
.tp-nav-cta {
  background: var(--accent); color: var(--bg);
  padding: 7px 14px; border-radius: 4px;
  font-size: 13px; font-weight: 600;
}
.tp-nav-cta:hover { background: #5eead4; text-decoration: none; }

/* Layout — 3-column desktop, single-column mobile */
.tp-layout {
  display: grid;
  grid-template-columns: 240px 1fr 220px;
  gap: 32px;
  max-width: 1280px;
  margin: 0 auto;
  padding: 24px;
}
.tp-sidebar {
  position: sticky; top: 70px;
  align-self: start;
  max-height: calc(100vh - 90px);
  overflow-y: auto;
  padding-right: 8px;
}
.tp-sidebar h3 {
  font-size: 11px; text-transform: uppercase; letter-spacing: 1.5px;
  color: var(--text3); margin: 18px 0 8px;
}
.tp-sidebar ul {
  list-style: none; margin: 0; padding: 0;
}
.tp-sidebar li { margin: 0; }
.tp-sidebar a {
  display: block; padding: 6px 10px;
  color: var(--text2); font-size: 13px;
  border-radius: 4px;
  text-decoration: none;
  border-left: 2px solid transparent;
}
.tp-sidebar a:hover { background: var(--bg2); color: var(--text); }
.tp-sidebar a.active {
  color: var(--accent); border-left-color: var(--accent);
  background: var(--bg2);
}

/* Right TOC */
.tp-toc {
  position: sticky; top: 70px;
  align-self: start;
  font-size: 13px;
}
.tp-toc h4 {
  font-size: 11px; text-transform: uppercase; letter-spacing: 1.5px;
  color: var(--text3); margin: 0 0 10px;
}
.tp-toc ul { list-style: none; margin: 0; padding: 0; }
.tp-toc a {
  display: block; padding: 4px 10px;
  color: var(--text2);
  border-left: 2px solid var(--border);
  text-decoration: none;
  font-size: 12px;
}
.tp-toc a:hover { color: var(--text); border-left-color: var(--accent); }

/* Article body */
.tp-article {
  min-width: 0;
  max-width: 760px;
}
.tp-breadcrumbs {
  font-size: 12px; color: var(--text3);
  margin-bottom: 24px;
}
.tp-breadcrumbs a { color: var(--text3); }
.tp-breadcrumbs a:hover { color: var(--text2); }
.tp-breadcrumbs span:not(:last-child)::after { content: "›"; padding: 0 6px; color: var(--text3); }

.tp-article h1 {
  font-size: 36px; line-height: 1.2;
  margin: 0 0 12px; color: var(--text);
  font-weight: 700; letter-spacing: -0.5px;
}
.tp-article .tp-meta {
  font-size: 13px; color: var(--text3);
  margin-bottom: 28px;
}
.tp-article h2 {
  font-size: 26px; margin: 40px 0 14px;
  font-weight: 700; color: var(--text); letter-spacing: -0.3px;
}
.tp-article h3 {
  font-size: 19px; margin: 28px 0 10px;
  font-weight: 600; color: var(--text);
}
.tp-article p { margin: 0 0 16px; }
.tp-article ul, .tp-article ol { margin: 0 0 18px; padding-left: 24px; }
.tp-article li { margin: 4px 0; }
.tp-article strong { color: var(--text); font-weight: 600; }
.tp-article code {
  background: var(--bg2); border: 1px solid var(--border);
  padding: 1px 5px; border-radius: 3px;
  font-family: ui-monospace, Menlo, monospace; font-size: 14px;
  color: var(--gold);
}
.tp-article blockquote {
  border-left: 3px solid var(--accent);
  margin: 24px 0; padding: 6px 18px;
  color: var(--text2); background: var(--bg2);
  border-radius: 0 4px 4px 0;
}

/* Diagrams */
.tp-diagram {
  background: var(--diag-bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 20px;
  margin: 28px 0;
  text-align: center;
}
.tp-diagram svg { width: 100%; max-width: 700px; height: auto; }
.tp-diagram figcaption {
  font-size: 13px; color: var(--text2);
  margin-top: 12px; font-style: italic;
}

/* FAQ */
.tp-faq {
  margin: 32px 0; padding: 24px;
  background: var(--bg2); border: 1px solid var(--border);
  border-radius: 6px;
}
.tp-faq h2 { margin-top: 0; font-size: 22px; }
.tp-faq details {
  border-bottom: 1px solid var(--border); padding: 12px 0;
}
.tp-faq details:last-child { border-bottom: none; }
.tp-faq summary {
  font-weight: 600; cursor: pointer;
  color: var(--text); font-size: 15px;
  padding: 4px 0;
}
.tp-faq summary:hover { color: var(--accent); }
.tp-faq details[open] summary { color: var(--accent); }
.tp-faq details p { margin: 10px 0 6px; color: var(--text2); }

/* CTA */
.tp-cta-box {
  background: linear-gradient(135deg, #1a1f2e 0%, #161b22 100%);
  border: 1px solid var(--accent);
  border-radius: 8px;
  padding: 28px;
  margin: 36px 0;
  text-align: center;
}
.tp-cta-box h3 {
  margin: 0 0 8px;
  font-size: 22px; color: var(--accent);
}
.tp-cta-box p { color: var(--text2); margin: 0 0 18px; }
.tp-cta-btn {
  display: inline-block;
  background: var(--accent); color: var(--bg) !important;
  padding: 12px 28px; border-radius: 6px;
  font-weight: 700; font-size: 15px; letter-spacing: 0.3px;
  text-decoration: none;
}
.tp-cta-btn:hover { background: #5eead4; text-decoration: none; }

/* Related links */
.tp-related {
  margin-top: 48px; padding-top: 28px;
  border-top: 1px solid var(--border);
}
.tp-related h3 { font-size: 16px; color: var(--text2); margin-bottom: 12px; }
.tp-related ul { list-style: none; padding: 0; }
.tp-related li { margin: 6px 0; }

/* Hub page */
.tp-hub-hero {
  text-align: center; padding: 48px 24px; margin-bottom: 32px;
  border-bottom: 1px solid var(--border);
}
.tp-hub-hero h1 { font-size: 42px; margin: 0 0 12px; }
.tp-hub-hero p { font-size: 18px; color: var(--text2); max-width: 640px; margin: 0 auto; }
.tp-hub-categories {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px; margin: 32px 0;
}
.tp-hub-cat {
  background: var(--bg2); border: 1px solid var(--border);
  border-radius: 8px; padding: 24px;
}
.tp-hub-cat h2 {
  font-size: 18px; margin: 0 0 12px;
  color: var(--accent); letter-spacing: 0.3px;
}
.tp-hub-cat ul { list-style: none; padding: 0; margin: 0; }
.tp-hub-cat li { padding: 6px 0; border-bottom: 1px solid var(--border); }
.tp-hub-cat li:last-child { border-bottom: none; }
.tp-hub-cat a { display: block; color: var(--text); font-weight: 500; }
.tp-hub-cat a:hover { color: var(--accent); text-decoration: none; }
.tp-hub-cat a small { display: block; font-weight: 400; color: var(--text3); font-size: 12px; margin-top: 2px; }

/* Footer */
.tp-footer {
  border-top: 1px solid var(--border);
  margin-top: 56px; padding: 28px 24px;
  text-align: center; font-size: 13px; color: var(--text3);
}

/* Mobile */
.tp-menu-toggle { display: none; }
@media (max-width: 1024px) {
  .tp-toc { display: none; }
  .tp-layout { grid-template-columns: 220px 1fr; }
}
@media (max-width: 768px) {
  .tp-nav { padding: 12px 16px; gap: 16px; }
  .tp-nav-links { display: none; }
  .tp-layout { grid-template-columns: 1fr; gap: 16px; padding: 16px; }
  .tp-sidebar {
    position: static; max-height: none;
    background: var(--bg2); border: 1px solid var(--border);
    border-radius: 6px; padding: 16px;
  }
  .tp-article h1 { font-size: 28px; }
  .tp-article h2 { font-size: 22px; }
  .tp-hub-hero h1 { font-size: 32px; }
}