/* ═══════════════════════════════════════════════════════════
   PrimeStrider Blog — Design System
   ═══════════════════════════════════════════════════════════ */

/* ── Reset & base ──────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --color-bg:          #f8fafc;
  --color-surface:     #ffffff;
  --color-border:      #e2e8f0;
  --color-text:        #1e293b;
  --color-muted:       #64748b;
  --color-heading:     #0f172a;
  --color-primary:     #3b82f6;
  --color-primary-dk:  #2563eb;
  --color-crypto:      #f59e0b;
  --color-stocks:      #10b981;
  --color-macro:       #8b5cf6;
  --color-finance:     #3b82f6;
  --font-body:        'Inter', system-ui, sans-serif;
  --font-display:     'Playfair Display', Georgia, serif;
  --radius:            12px;
  --radius-sm:         8px;
  --shadow-sm:         0 1px 3px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.04);
  --shadow-md:         0 4px 12px rgba(0,0,0,.08), 0 2px 4px rgba(0,0,0,.04);
  --shadow-lg:         0 10px 30px rgba(0,0,0,.1);
  --transition:        180ms ease;
  --max-width:         1200px;
}

html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
ul { list-style: none; }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 12px 24px;
  border-radius: 8px;
  font-weight: 600;
  font-size: .9375rem;
  transition: all var(--transition);
  cursor: pointer;
  border: none;
  white-space: nowrap;
}
.btn-primary  { background: var(--color-primary); color: #fff; }
.btn-primary:hover { background: var(--color-primary-dk); transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn-outline  { background: transparent; color: var(--color-primary); border: 2px solid var(--color-primary); }
.btn-outline:hover { background: var(--color-primary); color: #fff; }
.btn-white    { background: #fff; color: var(--color-primary-dk); }
.btn-white:hover { background: #f0f6ff; transform: translateY(-1px); }
.btn--full    { width: 100%; justify-content: center; }

/* ── Header ────────────────────────────────────────────────── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: 24px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.1rem;
  color: var(--color-heading);
  flex-shrink: 0;
}
.logo-text strong { color: var(--color-primary); }
.logo-blog-tag {
  background: var(--color-primary);
  color: #fff;
  font-size: .625rem;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  padding: 2px 7px;
  border-radius: 4px;
  vertical-align: middle;
  margin-left: 2px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-link {
  padding: 8px 14px;
  border-radius: 8px;
  font-weight: 500;
  font-size: .9375rem;
  color: var(--color-muted);
  transition: all var(--transition);
}
.nav-link:hover { color: var(--color-heading); background: var(--color-bg); }

.nav-cta {
  margin-left: 8px;
  padding: 9px 18px;
  background: var(--color-primary);
  color: #fff;
  border-radius: 8px;
  font-weight: 600;
  font-size: .875rem;
  transition: all var(--transition);
}
.nav-cta:hover { background: var(--color-primary-dk); transform: translateY(-1px); box-shadow: var(--shadow-md); }

.nav-mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}
.nav-mobile-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-heading);
  border-radius: 2px;
  transition: all var(--transition);
}

/* ── Hero ──────────────────────────────────────────────────── */
.hero {
  background: linear-gradient(135deg, #0f172a 0%, #1e3a5f 50%, #0f172a 100%);
  padding: 80px 0;
  overflow: hidden;
  position: relative;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 30% 50%, rgba(59,130,246,.2) 0%, transparent 60%),
              radial-gradient(ellipse at 80% 20%, rgba(139,92,246,.15) 0%, transparent 50%);
}

.hero-inner {
  position: relative;
  max-width: 700px;
  margin: 0 auto;
  text-align: center;
}

.hero-badge {
  display: inline-block;
  background: rgba(59,130,246,.2);
  color: #93c5fd;
  border: 1px solid rgba(59,130,246,.3);
  border-radius: 100px;
  padding: 6px 16px;
  font-size: .8125rem;
  font-weight: 600;
  letter-spacing: .04em;
  text-transform: uppercase;
  margin-bottom: 24px;
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  font-weight: 800;
  color: #fff;
  line-height: 1.15;
  margin-bottom: 16px;
}

.hero-subtitle {
  font-size: 1.125rem;
  color: #94a3b8;
  margin-bottom: 36px;
  max-width: 520px;
  margin-left: auto;
  margin-right: auto;
}

.hero-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ── Categories bar ────────────────────────────────────────── */
.categories-bar {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: 12px 0;
}

.category-nav {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.cat-pill {
  padding: 6px 16px;
  border-radius: 100px;
  font-size: .875rem;
  font-weight: 500;
  color: var(--color-muted);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  transition: all var(--transition);
}
.cat-pill:hover { color: var(--color-heading); border-color: var(--color-primary); }
.cat-pill--active { background: var(--color-primary); color: #fff; border-color: var(--color-primary); }
.cat-pill--crypto:hover, .cat-pill--crypto.cat-pill--active  { background: var(--color-crypto); border-color: var(--color-crypto); color: #fff; }
.cat-pill--stocks:hover, .cat-pill--stocks.cat-pill--active  { background: var(--color-stocks); border-color: var(--color-stocks); color: #fff; }
.cat-pill--macro:hover,  .cat-pill--macro.cat-pill--active   { background: var(--color-macro);  border-color: var(--color-macro);  color: #fff; }

/* ── Category badges ───────────────────────────────────────── */
.cat-badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 100px;
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .04em;
  text-transform: uppercase;
}
.cat-badge--crypto  { background: #fef3c7; color: #92400e; }
.cat-badge--stocks  { background: #d1fae5; color: #065f46; }
.cat-badge--macro   { background: #ede9fe; color: #4c1d95; }
.cat-badge--finance { background: #dbeafe; color: #1e40af; }
.cat-badge--lg  { font-size: .875rem; padding: 6px 16px; }
.cat-badge--xs  { font-size: .6875rem; padding: 2px 8px; }

/* ── Articles section ──────────────────────────────────────── */
.articles-section {
  padding: 48px 0 64px;
}

/* Featured article */
.article-featured {
  margin-bottom: 48px;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  background: linear-gradient(135deg, #0f172a, #1e3a5f);
  transition: box-shadow var(--transition), transform var(--transition);
}
.article-featured:hover { box-shadow: var(--shadow-lg); transform: translateY(-2px); }
.article-featured-link { display: block; color: inherit; }
.article-featured-body { padding: 48px; }
.article-featured-title {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3vw, 2.25rem);
  color: #fff;
  line-height: 1.25;
  margin: 16px 0 16px;
}
.article-featured-excerpt { color: #94a3b8; font-size: 1.05rem; margin-bottom: 24px; max-width: 600px; }
.article-read-more { color: #60a5fa; font-weight: 600; font-size: .9375rem; }
.article-featured .article-date,
.article-featured .article-read-time { color: #64748b; }

/* Grid */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 24px;
}
.articles-grid--full {
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
}

.article-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: all var(--transition);
}
.article-card:hover { border-color: var(--color-primary); box-shadow: var(--shadow-md); transform: translateY(-2px); }
.article-card-link { display: block; height: 100%; color: inherit; }
.article-card-body { padding: 24px; display: flex; flex-direction: column; gap: 12px; height: 100%; }
.article-card-title {
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--color-heading);
  line-height: 1.35;
  flex-grow: 1;
}
.article-card-excerpt { font-size: .875rem; color: var(--color-muted); line-height: 1.6; }
.article-card-footer { display: flex; justify-content: space-between; align-items: center; margin-top: auto; }
.article-read-more-sm { font-size: .8125rem; font-weight: 600; color: var(--color-primary); }

/* Meta shared */
.article-meta { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.article-date { font-size: .8125rem; color: var(--color-muted); }
.article-read-time { font-size: .8125rem; color: var(--color-muted); }
.article-read-time::before { content: '·'; margin-right: 8px; }

/* ── Pagination ────────────────────────────────────────────── */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-top: 48px;
}
.pagination-btn {
  padding: 10px 20px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  font-weight: 600;
  color: var(--color-primary);
  transition: all var(--transition);
}
.pagination-btn:hover { background: var(--color-primary); color: #fff; border-color: var(--color-primary); }
.pagination-info { color: var(--color-muted); font-size: .875rem; }

/* ── CTA Banner ────────────────────────────────────────────── */
.cta-banner {
  background: linear-gradient(135deg, var(--color-primary) 0%, #7c3aed 100%);
  padding: 60px 0;
  margin-top: 0;
}
.cta-banner-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
}
.cta-banner-text h2 {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2rem);
  color: #fff;
  margin-bottom: 8px;
}
.cta-banner-text p { color: rgba(255,255,255,.8); font-size: 1rem; }

/* ── Category hero ─────────────────────────────────────────── */
.category-hero {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: 40px 0 32px;
}
.category-hero-inner { margin-top: 20px; }
.category-hero-inner h1 {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  color: var(--color-heading);
  margin: 12px 0 10px;
}
.category-hero-inner p { color: var(--color-muted); font-size: 1rem; max-width: 560px; }

/* ── Article page ──────────────────────────────────────────── */
.article-page { padding: 40px 0 64px; }

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: .8125rem;
  color: var(--color-muted);
  margin-bottom: 32px;
}
.breadcrumb a { color: var(--color-primary); }
.breadcrumb a:hover { text-decoration: underline; }
.breadcrumb span[aria-hidden] { color: var(--color-border); }

.article-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 48px;
  align-items: start;
}

.article-header { margin-bottom: 36px; }
.article-title {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  color: var(--color-heading);
  line-height: 1.2;
  margin: 16px 0 20px;
}
.article-lead {
  font-size: 1.125rem;
  color: var(--color-muted);
  line-height: 1.7;
  margin-bottom: 20px;
}
.article-tags { display: flex; flex-wrap: wrap; gap: 8px; }

.article-disclaimer {
  border-radius: var(--radius-sm);
  padding: 14px 18px;
  font-size: .875rem;
  line-height: 1.6;
}
.article-disclaimer p { margin: 0; }
.article-disclaimer--ai {
  margin-bottom: 28px;
  background: #f1f5f9;
  border: 1px solid var(--color-border);
  border-left: 4px solid #94a3b8;
  color: var(--color-muted);
}
.article-disclaimer--ai strong { color: var(--color-heading); font-weight: 600; }
.article-disclaimer--legal {
  margin: 32px 0 0;
  background: #fffbeb;
  border: 1px solid #fde68a;
  border-left: 4px solid var(--color-crypto);
  color: #78350f;
}

.tag {
  display: inline-block;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  color: var(--color-muted);
  padding: 4px 10px;
  border-radius: 6px;
  font-size: .8125rem;
}

/* Prose — article body */
.prose { font-size: 1.0625rem; line-height: 1.8; color: var(--color-text); }
.prose p    { margin-bottom: 1.4em; }
.prose h2   { font-family: var(--font-display); font-size: 1.6rem; color: var(--color-heading); margin: 2.4em 0 .8em; line-height: 1.25; }
.prose h3   { font-size: 1.2rem; font-weight: 700; color: var(--color-heading); margin: 2em 0 .6em; }
.prose ul, .prose ol { margin-bottom: 1.4em; padding-left: 1.5em; }
.prose ul   { list-style: disc; }
.prose ol   { list-style: decimal; }
.prose li   { margin-bottom: .4em; }
.prose strong { font-weight: 700; color: var(--color-heading); }
.prose em   { font-style: italic; }
.prose a    { color: var(--color-primary); text-decoration: underline; }
.prose a:hover { color: var(--color-primary-dk); }
.prose blockquote {
  border-left: 4px solid var(--color-primary);
  padding: 16px 20px;
  margin: 1.6em 0;
  background: #f0f6ff;
  border-radius: 0 8px 8px 0;
  color: var(--color-muted);
  font-style: italic;
}
.prose code {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: .875em;
  font-family: monospace;
}

/* Article CTA box */
.article-cta-box {
  margin: 40px 0;
  background: linear-gradient(135deg, #eff6ff, #f0f4ff);
  border: 1px solid #bfdbfe;
  border-radius: var(--radius);
  padding: 28px;
}
.article-cta-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}
.article-cta-inner h3 { font-size: 1.125rem; font-weight: 700; color: var(--color-heading); margin-bottom: 6px; }
.article-cta-inner p  { color: var(--color-muted); font-size: .9375rem; }
.article-footer-tags  { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin-top: 32px; padding-top: 24px; border-top: 1px solid var(--color-border); }
.tags-label { font-size: .8125rem; font-weight: 600; color: var(--color-muted); }

/* Sidebar */
.article-sidebar { display: flex; flex-direction: column; gap: 24px; position: sticky; top: 84px; }

.sidebar-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 24px;
}
.sidebar-card h4 { font-size: 1rem; font-weight: 700; color: var(--color-heading); margin-bottom: 12px; }

.sidebar-cta { background: linear-gradient(135deg, #0f172a, #1e3a5f); border-color: transparent; }
.sidebar-cta h4, .sidebar-cta p { color: #e2e8f0; }
.sidebar-cta p { font-size: .875rem; line-height: 1.6; margin-bottom: 16px; }

.sidebar-cta-points { margin-bottom: 20px; display: flex; flex-direction: column; gap: 6px; }
.sidebar-cta-points li { font-size: .875rem; color: #93c5fd; }

.related-list { display: flex; flex-direction: column; gap: 14px; }
.related-link { display: flex; flex-direction: column; gap: 6px; }
.related-link span:last-child { font-size: .9rem; font-weight: 500; color: var(--color-heading); line-height: 1.4; }
.related-link:hover span:last-child { color: var(--color-primary); }

/* ── Empty state ───────────────────────────────────────────── */
.empty-state {
  text-align: center;
  padding: 80px 24px;
  color: var(--color-muted);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
}

/* ── Error page ────────────────────────────────────────────── */
.error-page { padding: 120px 0; }
.error-inner { text-align: center; }
.error-inner h1 { font-family: var(--font-display); font-size: 6rem; color: var(--color-border); line-height: 1; margin-bottom: 16px; }
.error-inner p { color: var(--color-muted); font-size: 1.125rem; margin-bottom: 32px; }

/* ── Footer ────────────────────────────────────────────────── */
.site-footer {
  background: #0f172a;
  color: #94a3b8;
  padding: 60px 0 32px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 40px;
  margin-bottom: 48px;
}

.footer-brand .footer-logo { font-size: 1.125rem; color: #fff; display: block; margin-bottom: 12px; }
.footer-brand .footer-logo strong { color: var(--color-primary); }
.footer-brand p { font-size: .875rem; line-height: 1.6; }

.footer-col h4 { font-size: .875rem; font-weight: 700; color: #fff; margin-bottom: 16px; text-transform: uppercase; letter-spacing: .06em; }
.footer-col ul { display: flex; flex-direction: column; gap: 10px; }
.footer-col a { font-size: .9rem; color: #94a3b8; transition: color var(--transition); }
.footer-col a:hover { color: #fff; }

.footer-cta-box { background: rgba(255,255,255,.05); border: 1px solid rgba(255,255,255,.08); border-radius: var(--radius); padding: 24px; }
.footer-cta-box h4 { font-size: .9375rem; font-weight: 700; color: #fff; margin-bottom: 10px; }
.footer-cta-box p { font-size: .875rem; line-height: 1.6; margin-bottom: 20px; }

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.08);
  padding-top: 28px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  font-size: .8125rem;
  color: #475569;
}

/* ═══════════════════════════════════════════════════════════
   Responsive
   ═══════════════════════════════════════════════════════════ */
@media (max-width: 900px) {
  .article-layout { grid-template-columns: 1fr; }
  .article-sidebar { position: static; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-cta-box { grid-column: 1 / -1; }
}

@media (max-width: 680px) {
  .nav-links { display: none; }
  .nav--open .nav-links {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 64px;
    left: 0; right: 0;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    padding: 16px 24px;
    gap: 8px;
    box-shadow: var(--shadow-md);
  }
  .nav-mobile-toggle { display: flex; }
  .nav { position: relative; }

  .hero { padding: 56px 0; }
  .hero-actions { flex-direction: column; align-items: center; }
  .articles-grid { grid-template-columns: 1fr; }
  .article-featured-body { padding: 28px 24px; }
  .cta-banner-inner { flex-direction: column; text-align: center; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .article-cta-inner { flex-direction: column; }
}