/* EP Trade Blog — shared stylesheet
   Reuses the dashboard's dark navy/indigo palette (see frontend/index.html's
   :root vars) for brand consistency, but tuned for reading: wider line
   height, capped measure, larger type scale — the dashboard's CSS is
   optimized for dense data, this is optimized for a paragraph of prose. */

:root {
  --bg:        #04060c;
  --panel:     #0b1020;
  --panel-2:   #10172b;
  --border:    #1f2a44;
  --text:      #e6e9f2;
  --text-dim:  #8892b0;
  --text-dim-2:#5b657f;
  --accent:    #6366f1;
  --accent-2:  #818cf8;
  --green:     #22c55e;
  --red:       #ef4444;
  --amber:     #f59e0b;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, sans-serif;
  line-height: 1.6;
}

a { color: var(--accent-2); text-decoration: none; }
a:hover { text-decoration: underline; }

.site-header {
  border-bottom: 1px solid var(--border);
  padding: 18px 24px;
}
.site-header .wrap {
  max-width: 1040px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.site-header .logo {
  font-weight: 800;
  font-size: 18px;
  letter-spacing: -0.01em;
  color: var(--text);
}
.site-header .logo span { color: var(--accent-2); }
.site-header nav a {
  color: var(--text-dim);
  font-size: 14px;
  margin-left: 20px;
}
.site-header nav a:hover { color: var(--text); }

main { max-width: 1040px; margin: 0 auto; padding: 48px 24px 80px; }

/* Article */
article.post { max-width: 720px; margin: 0 auto; }
.post-kicker {
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 12px;
  font-weight: 700;
  color: var(--accent-2);
  margin-bottom: 14px;
}
.post h1 {
  font-size: clamp(28px, 4vw, 40px);
  line-height: 1.15;
  margin: 0 0 14px;
  letter-spacing: -0.01em;
}
.post .dek {
  font-size: 18px;
  color: var(--text-dim);
  margin-bottom: 20px;
  line-height: 1.5;
}
.post .meta {
  font-size: 13px;
  color: var(--text-dim-2);
  margin-bottom: 40px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border);
}
.post h2 {
  font-size: 24px;
  margin: 44px 0 16px;
  letter-spacing: -0.01em;
}
.post h3 {
  font-size: 19px;
  margin: 32px 0 12px;
}
.post p { font-size: 17px; color: var(--text); margin: 0 0 18px; }
.post ul, .post ol { font-size: 17px; margin: 0 0 18px; padding-left: 22px; }
.post li { margin-bottom: 8px; }
.post strong { color: #fff; }
.post blockquote {
  margin: 28px 0;
  padding: 4px 0 4px 20px;
  border-left: 3px solid var(--accent);
  color: var(--text-dim);
  font-style: italic;
}
.callout {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 18px 20px;
  margin: 28px 0;
  font-size: 15px;
  color: var(--text-dim);
}
.callout strong { color: var(--text); }
.callout.crosslink { border-color: rgba(99,102,241,0.4); background: linear-gradient(180deg, rgba(99,102,241,0.08), var(--panel)); }
.disclaimer {
  font-size: 13px;
  color: var(--text-dim-2);
  border-top: 1px solid var(--border);
  margin-top: 48px;
  padding-top: 20px;
}

/* FAQ accordion */
.faq-section { max-width: 720px; margin: 0 auto 40px; }
.faq-section h2 { font-size: 22px; margin: 0 0 16px; letter-spacing: -0.01em; }
.faq-item {
  border: 1px solid var(--border);
  border-radius: 10px;
  margin-bottom: 10px;
  background: var(--panel);
  overflow: hidden;
}
.faq-item summary {
  padding: 16px 20px;
  font-size: 15.5px;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+";
  font-size: 20px;
  color: var(--accent-2);
  font-weight: 400;
  flex-shrink: 0;
}
.faq-item[open] summary::after { content: "\2212"; }
.faq-item[open] summary { border-bottom: 1px solid var(--border); }
.faq-item .faq-answer { padding: 16px 20px 20px; font-size: 15px; color: var(--text-dim); line-height: 1.6; }
.faq-answer p { margin: 0 0 12px; font-size: 15px; color: var(--text-dim); }
.faq-answer p:last-child { margin-bottom: 0; }
.faq-answer a { color: var(--accent-2); }

/* Numbered step guide (Getting Started) */
.steps { max-width: 720px; margin: 0 auto; counter-reset: step; }
.step {
  display: flex;
  gap: 18px;
  margin-bottom: 32px;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--border);
}
.step:last-child { border-bottom: none; }
.step-num {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--panel-2);
  border: 1px solid var(--accent);
  color: var(--accent-2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 15px;
}
.step-body h3 { margin: 2px 0 10px; font-size: 19px; }
.step-body p { font-size: 15.5px; color: var(--text); margin: 0 0 12px; line-height: 1.6; }
.step-body ul { font-size: 15px; margin: 0 0 12px; padding-left: 20px; color: var(--text-dim); }
.step-body li { margin-bottom: 6px; }
.step-body code {
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1px 6px;
  font-size: 13.5px;
  color: var(--accent-2);
}

/* Blog index / listing */
.blog-hero { max-width: 720px; margin: 0 auto 48px; }
.blog-hero h1 { font-size: clamp(30px, 4.5vw, 44px); margin: 0 0 12px; letter-spacing: -0.01em; }
.blog-hero p { font-size: 18px; color: var(--text-dim); max-width: 60ch; }

.post-list { max-width: 760px; margin: 0 auto; display: flex; flex-direction: column; gap: 4px; }
.post-card {
  display: block;
  padding: 22px 24px;
  border: 1px solid var(--border);
  border-radius: 12px;
  margin-bottom: 14px;
  background: var(--panel);
  transition: border-color .15s ease, transform .15s ease;
}
.post-card:hover { border-color: var(--accent); text-decoration: none; transform: translateY(-1px); }
.post-card .cat { font-size: 11.5px; text-transform: uppercase; letter-spacing: .07em; color: var(--accent-2); font-weight: 700; margin-bottom: 8px; }
.post-card h2 { font-size: 20px; margin: 0 0 8px; color: var(--text); letter-spacing: -0.01em; }
.post-card p { font-size: 14.5px; color: var(--text-dim); margin: 0; line-height: 1.55; }

.site-footer {
  border-top: 1px solid var(--border);
  padding: 32px 24px;
  margin-top: 40px;
}
.site-footer .wrap {
  max-width: 1040px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 13px;
  color: var(--text-dim-2);
}
.site-footer a { color: var(--text-dim); }

@media (max-width: 640px) {
  main { padding: 32px 18px 60px; }
  .post p, .post ul, .post ol { font-size: 16px; }
}