/* ─── TradingBot Blog — Design System ─────────────────────────────────────── */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:          #07070c;
  --surface:     #111118;
  --surface-2:   #1a1a24;
  --border:      rgba(255,255,255,.07);
  --border-2:    rgba(255,255,255,.12);
  --text:        #f2f2f7;
  --text-2:      #9898b8;
  --text-3:      #5c5c78;
  --accent:      #6366f1;
  --accent-h:    #818cf8;
  --accent-2:    #a855f7;
  --green:       #22c55e;
  --red:         #f43f5e;
  --yellow:      #f59e0b;
  --font:        'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --serif:       'Georgia', 'Times New Roman', 'Noto Serif', serif;
  --max:         740px;
  --max-wide:    1160px;
  --r:           12px;
}

html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent-h); text-decoration: none; }
a:hover { color: #fff; }
img { max-width: 100%; display: block; }

/* ── Nav ──────────────────────────────────────────────────────────────────── */
.blog-nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(7,7,12,.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: var(--max-wide);
  margin: 0 auto;
  padding: 0 24px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.nav-logo {
  display: flex; align-items: center; gap: 10px;
  font-weight: 800; font-size: 17px; color: var(--text);
  text-decoration: none; letter-spacing: -.3px;
}
.nav-logo svg { color: var(--accent); }
.nav-logo-badge {
  font-size: 9px; font-weight: 800; letter-spacing: .7px;
  background: linear-gradient(135deg,var(--accent),var(--accent-2));
  color: #fff; padding: 2px 6px; border-radius: 4px;
  text-transform: uppercase;
}
.nav-links {
  display: flex; align-items: center; gap: 4px; list-style: none;
}
.nav-links a {
  color: var(--text-2); font-size: 14px; font-weight: 500;
  padding: 6px 12px; border-radius: 8px;
  transition: all .15s;
}
.nav-links a:hover { color: var(--text); background: rgba(255,255,255,.06); }
.nav-cta {
  background: var(--accent);
  color: #fff !important;
  padding: 8px 18px !important;
  border-radius: 8px !important;
  font-weight: 600 !important;
  transition: all .15s !important;
}
.nav-cta:hover { background: var(--accent-h) !important; color: #fff !important; transform: translateY(-1px); }

/* ── Hero (index) ─────────────────────────────────────────────────────────── */
.blog-hero {
  background: radial-gradient(ellipse 80% 50% at 50% -10%, rgba(99,102,241,.25) 0%, transparent 70%),
              var(--bg);
  padding: 100px 24px 80px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.blog-hero::before {
  content: '';
  position: absolute; inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%236366f1' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  pointer-events: none;
}
.hero-eyebrow {
  display: inline-flex; align-items: center; gap: 6px;
  background: rgba(99,102,241,.12);
  border: 1px solid rgba(99,102,241,.25);
  color: var(--accent-h);
  font-size: 12px; font-weight: 600; letter-spacing: .5px;
  padding: 5px 14px; border-radius: 20px;
  margin-bottom: 20px; text-transform: uppercase;
}
.blog-hero h1 {
  font-size: clamp(36px, 6vw, 64px);
  font-weight: 800; line-height: 1.1;
  letter-spacing: -.5px;
  max-width: 700px; margin: 0 auto 20px;
  background: linear-gradient(135deg, #fff 40%, rgba(255,255,255,.55));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.blog-hero p {
  font-size: 18px; color: var(--text-2);
  max-width: 500px; margin: 0 auto 36px;
  line-height: 1.7;
}
.hero-search {
  max-width: 420px; margin: 0 auto;
  display: flex; gap: 0;
  background: var(--surface);
  border: 1px solid var(--border-2);
  border-radius: 12px; overflow: hidden;
  transition: border-color .2s;
}
.hero-search:focus-within { border-color: var(--accent); }
.hero-search input {
  flex: 1; background: none; border: none; outline: none;
  color: var(--text); font-size: 14px; padding: 14px 18px;
  font-family: var(--font);
}
.hero-search input::placeholder { color: var(--text-3); }
.hero-search button {
  background: var(--accent); border: none; cursor: pointer;
  color: #fff; font-size: 13px; font-weight: 600;
  padding: 0 20px; transition: background .15s;
}
.hero-search button:hover { background: var(--accent-h); }

/* ── Category strip ───────────────────────────────────────────────────────── */
.category-strip {
  border-bottom: 1px solid var(--border);
  padding: 0 24px;
}
.category-strip-inner {
  max-width: var(--max-wide); margin: 0 auto;
  display: flex; gap: 4px; overflow-x: auto;
  scrollbar-width: none;
}
.category-strip-inner::-webkit-scrollbar { display: none; }
.cat-btn {
  background: none; border: none; cursor: pointer;
  color: var(--text-2); font-size: 13px; font-weight: 500;
  padding: 14px 16px; white-space: nowrap;
  border-bottom: 2px solid transparent;
  transition: all .15s;
  font-family: var(--font);
}
.cat-btn:hover { color: var(--text); }
.cat-btn.active { color: var(--accent-h); border-bottom-color: var(--accent); }

/* ── Article grid ─────────────────────────────────────────────────────────── */
.blog-grid-wrap {
  max-width: var(--max-wide); margin: 0 auto;
  padding: 56px 24px 80px;
}
.featured-row {
  display: grid; grid-template-columns: 1.4fr 1fr;
  gap: 24px; margin-bottom: 48px;
}
.article-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}
.article-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r);
  overflow: hidden;
  transition: all .2s;
  display: flex; flex-direction: column;
}
.article-card:hover {
  border-color: var(--border-2);
  transform: translateY(-3px);
  box-shadow: 0 12px 40px rgba(0,0,0,.4);
}
.card-thumb {
  aspect-ratio: 16/9;
  display: flex; align-items: center; justify-content: center;
  font-size: 40px;
  position: relative; overflow: hidden;
}
.card-thumb-featured { aspect-ratio: 16/9; }

.card-body { padding: 20px; flex: 1; display: flex; flex-direction: column; gap: 10px; }
.card-tag {
  display: inline-block;
  font-size: 10px; font-weight: 700; letter-spacing: .6px; text-transform: uppercase;
  padding: 3px 8px; border-radius: 4px;
  align-self: flex-start;
}
.tag-strategy  { background: rgba(99,102,241,.15);  color: #818cf8; }
.tag-beginner  { background: rgba(34,197,94,.12);   color: #4ade80; }
.tag-analysis  { background: rgba(245,158,11,.12);  color: #fbbf24; }
.tag-tech      { background: rgba(168,85,247,.15);  color: #c084fc; }
.tag-market    { background: rgba(244,63,94,.12);   color: #fb7185; }
.tag-automation{ background: rgba(6,182,212,.12);   color: #22d3ee; }

.card-title {
  font-size: 18px; font-weight: 700; line-height: 1.3;
  color: var(--text); transition: color .15s;
}
.article-card:hover .card-title { color: var(--accent-h); }
.card-title-featured { font-size: 24px; }
.card-excerpt {
  font-size: 13.5px; color: var(--text-2); line-height: 1.6;
  display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical;
  overflow: hidden;
}
.card-meta {
  display: flex; align-items: center; gap: 10px;
  font-size: 12px; color: var(--text-3);
  margin-top: auto; padding-top: 8px;
}
.card-meta-dot { width: 2px; height: 2px; background: var(--text-3); border-radius: 50%; }
.card-read-more {
  font-size: 12px; font-weight: 600; color: var(--accent-h);
  margin-top: auto; padding-top: 6px;
  display: flex; align-items: center; gap: 4px;
}
.card-read-more::after { content: '→'; transition: transform .15s; }
.article-card:hover .card-read-more::after { transform: translateX(3px); }

/* Gradient themes per post */
.grad-1 { background: linear-gradient(135deg, #1e1b4b, #312e81); }
.grad-2 { background: linear-gradient(135deg, #1a0533, #4a044e); }
.grad-3 { background: linear-gradient(135deg, #052e16, #14532d); }
.grad-4 { background: linear-gradient(135deg, #0f172a, #1e3a5f); }
.grad-5 { background: linear-gradient(135deg, #1c1917, #44403c); }
.grad-6 { background: linear-gradient(135deg, #0f2027, #203a43, #2c5364); }
.grad-7 { background: linear-gradient(135deg, #1a1f35, #2d1b69); }
.grad-8 { background: linear-gradient(135deg, #2d1515, #7f1d1d); }
.grad-9 { background: linear-gradient(135deg, #0d2137, #0a4a5e); }
.grad-10{ background: linear-gradient(135deg, #14002a, #1e0a3c); }

/* ── Article page ─────────────────────────────────────────────────────────── */
.post-hero {
  padding: 80px 24px 60px;
  background: radial-gradient(ellipse 70% 60% at 50% -5%, rgba(99,102,241,.2) 0%, transparent 65%);
  text-align: center;
}
.post-tag {
  display: inline-block;
  font-size: 11px; font-weight: 700; letter-spacing: .7px; text-transform: uppercase;
  padding: 4px 12px; border-radius: 4px; margin-bottom: 20px;
}
.post-hero h1 {
  font-size: clamp(28px, 5vw, 48px);
  font-weight: 800; line-height: 1.15;
  letter-spacing: -.3px;
  max-width: var(--max); margin: 0 auto 16px;
  background: linear-gradient(135deg, #fff 50%, rgba(255,255,255,.6));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.post-excerpt {
  font-size: 18px; color: var(--text-2);
  max-width: 580px; margin: 0 auto 28px;
  line-height: 1.7;
}
.post-meta {
  display: flex; align-items: center; justify-content: center;
  gap: 16px; flex-wrap: wrap;
  font-size: 13px; color: var(--text-3);
}
.post-meta-author {
  display: flex; align-items: center; gap: 8px;
  color: var(--text-2);
}
.post-meta-avatar {
  width: 28px; height: 28px; border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  display: flex; align-items: center; justify-content: center;
  font-size: 12px; font-weight: 700; color: #fff;
}
.post-meta-sep { color: var(--border-2); }

/* ── Article layout ───────────────────────────────────────────────────────── */
.post-layout {
  max-width: var(--max-wide); margin: 0 auto;
  padding: 0 24px 80px;
  display: grid;
  grid-template-columns: minmax(0, var(--max)) 280px;
  gap: 48px;
  justify-content: center;
}
.post-content {
  min-width: 0;
}
.post-content h2 {
  font-size: 24px; font-weight: 700; margin: 40px 0 16px;
  color: var(--text); letter-spacing: -.2px;
  border-left: 3px solid var(--accent);
  padding-left: 16px;
}
.post-content h3 {
  font-size: 19px; font-weight: 600; margin: 32px 0 12px;
  color: var(--text);
}
.post-content p {
  font-family: var(--serif);
  font-size: 17px; line-height: 1.85;
  color: var(--text-2); margin-bottom: 22px;
}
.post-content strong { color: var(--text); font-weight: 600; }
.post-content em { color: var(--text-2); font-style: italic; }
.post-content a { color: var(--accent-h); border-bottom: 1px solid rgba(129,140,248,.3); }
.post-content a:hover { color: #fff; border-bottom-color: #fff; }
.post-content ul, .post-content ol {
  margin: 4px 0 22px 1.4em;
}
.post-content li {
  font-family: var(--serif);
  font-size: 17px; line-height: 1.8; color: var(--text-2);
  margin-bottom: 8px;
}
.post-content li strong { color: var(--text); }

/* Callout blocks */
.callout {
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: 0 8px 8px 0;
  padding: 16px 20px; margin: 28px 0;
}
.callout-warn { border-left-color: var(--yellow); }
.callout-good { border-left-color: var(--green); }
.callout-bad  { border-left-color: var(--red); }
.callout p { margin: 0; font-family: var(--font); font-size: 15px; color: var(--text-2); }
.callout strong { color: var(--text); }

/* Data table */
.data-table {
  width: 100%; border-collapse: collapse;
  margin: 24px 0; font-size: 14px;
}
.data-table th {
  text-align: left; padding: 10px 14px;
  border-bottom: 1px solid var(--border-2);
  color: var(--text-3); font-weight: 600;
  font-size: 11px; text-transform: uppercase; letter-spacing: .5px;
}
.data-table td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--border);
  color: var(--text-2); font-family: var(--font);
}
.data-table tr:last-child td { border-bottom: none; }

/* Pull quote */
.pull-quote {
  font-size: 22px; font-weight: 700; line-height: 1.4;
  color: var(--text); font-family: var(--font);
  border-left: 3px solid var(--accent-2);
  padding: 4px 0 4px 20px; margin: 36px 0;
  background: none;
}

/* ── Sidebar ──────────────────────────────────────────────────────────────── */
.post-sidebar { padding-top: 4px; }
.sidebar-widget {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 20px; margin-bottom: 20px;
}
.sidebar-title {
  font-size: 11px; font-weight: 700; letter-spacing: .7px;
  text-transform: uppercase; color: var(--text-3);
  margin-bottom: 14px;
}
.related-item {
  display: flex; gap: 10px; padding: 10px 0;
  border-bottom: 1px solid var(--border);
}
.related-item:last-child { border-bottom: none; padding-bottom: 0; }
.related-num {
  font-size: 22px; font-weight: 800; color: var(--border-2);
  line-height: 1; flex-shrink: 0; min-width: 24px;
}
.related-link {
  font-size: 13px; font-weight: 500; color: var(--text-2);
  line-height: 1.4; transition: color .15s;
}
.related-link:hover { color: var(--text); }
.toc-list { list-style: none; }
.toc-item { padding: 6px 0; border-bottom: 1px solid var(--border); }
.toc-item:last-child { border-bottom: none; }
.toc-link { font-size: 13px; color: var(--text-2); transition: color .15s; }
.toc-link:hover { color: var(--accent-h); }

/* ── CTA block ────────────────────────────────────────────────────────────── */
.post-cta {
  background: linear-gradient(135deg, rgba(99,102,241,.12), rgba(168,85,247,.08));
  border: 1px solid rgba(99,102,241,.2);
  border-radius: 16px; padding: 36px; margin: 48px 0;
  text-align: center;
}
.post-cta h3 { font-size: 22px; font-weight: 700; margin-bottom: 10px; }
.post-cta p { font-size: 15px; color: var(--text-2); margin-bottom: 24px; font-family: var(--font); }
.cta-btn {
  display: inline-block;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff; font-weight: 700; font-size: 15px;
  padding: 14px 28px; border-radius: 10px;
  transition: all .2s; text-decoration: none;
  box-shadow: 0 4px 20px rgba(99,102,241,.35);
}
.cta-btn:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(99,102,241,.5); color: #fff; }
.cta-sub { font-size: 12px; color: var(--text-3); margin-top: 12px; font-family: var(--font); }

/* ── Footer ───────────────────────────────────────────────────────────────── */
.blog-footer {
  border-top: 1px solid var(--border);
  padding: 40px 24px;
  text-align: center;
}
.blog-footer p { font-size: 13px; color: var(--text-3); }
.blog-footer a { color: var(--text-2); }
.blog-footer a:hover { color: var(--text); }
.footer-links {
  display: flex; gap: 20px; justify-content: center;
  margin-bottom: 16px; flex-wrap: wrap;
}

/* ── Breadcrumb ───────────────────────────────────────────────────────────── */
.breadcrumb {
  max-width: var(--max-wide); margin: 0 auto;
  padding: 16px 24px 0;
  display: flex; gap: 6px; align-items: center;
  font-size: 12px; color: var(--text-3);
  list-style: none;
}
.breadcrumb li + li::before { content: '/'; margin-right: 6px; }
.breadcrumb a { color: var(--text-3); transition: color .15s; }
.breadcrumb a:hover { color: var(--text-2); }
.breadcrumb li:last-child { color: var(--text-2); }

/* ── Responsive ───────────────────────────────────────────────────────────── */
@media (max-width: 900px) {
  .post-layout { grid-template-columns: 1fr; }
  .post-sidebar { display: none; }
  .featured-row { grid-template-columns: 1fr; }
}
@media (max-width: 600px) {
  .blog-hero { padding: 60px 16px 48px; }
  .blog-hero h1 { font-size: 32px; }
  .blog-grid-wrap { padding: 32px 16px 60px; }
  .article-grid { grid-template-columns: 1fr; }
  .post-hero { padding: 48px 16px 40px; }
  .nav-links { display: none; }
}

/* ── Misc ─────────────────────────────────────────────────────────────────── */
.section-title {
  font-size: 11px; font-weight: 700; letter-spacing: .8px;
  text-transform: uppercase; color: var(--text-3);
  margin-bottom: 24px;
  display: flex; align-items: center; gap: 10px;
}
.section-title::after {
  content: ''; flex: 1; height: 1px; background: var(--border);
}
.divider { height: 1px; background: var(--border); margin: 48px 0; }