/* ══════════════════════════════════════════════════════════════════════════════
   PULSEBYTE — ARTICLE STYLESHEET (article.css)
   Dedicated responsive styles for Pulsebyte technical breakdown articles.
   Compatible with standalone articles, static generated pages, and embedded feeds.
   ══════════════════════════════════════════════════════════════════════════════ */

/* ══ 1. DESIGN TOKENS ══ */
:root {
  --bg: #f8fafc;
  --bg2: #f1f5f9;
  --panel: #ffffff;
  --ink: #0f172a;
  --ink2: #475569;
  --ink3: #94a3b8;
  --line: #e2e8f0;
  --line-strong: #cbd5e1;
  --acc: #6366f1;
  --acc-h: #4f46e5;
  --acc-soft: #eef2ff;
  --acc-ink: #ffffff;
  --hot: #f59e0b;
  --sh-sm: 0 1px 3px rgba(0, 0, 0, 0.05), 0 1px 2px rgba(0, 0, 0, 0.03);
  --sh: 0 4px 14px rgba(0, 0, 0, 0.06), 0 1px 3px rgba(0, 0, 0, 0.04);
  --sh-lg: 0 12px 32px rgba(0, 0, 0, 0.1), 0 4px 10px rgba(0, 0, 0, 0.05);
  --r-sm: 6px;
  --r: 10px;
  --r-lg: 16px;
  --r-xl: 20px;
  --hdr: 64px;
}

[data-theme="dark"] {
  --bg: #090d16;
  --bg2: #0f172a;
  --panel: #111827;
  --ink: #f8fafc;
  --ink2: #94a3b8;
  --ink3: #64748b;
  --line: #1e293b;
  --line-strong: #334155;
  --acc: #818cf8;
  --acc-h: #a5b4fc;
  --acc-soft: #1e1b4b;
  --acc-ink: #090d16;
  --hot: #fbbf24;
  --sh-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
  --sh: 0 4px 16px rgba(0, 0, 0, 0.45);
  --sh-lg: 0 14px 40px rgba(0, 0, 0, 0.6);
}

/* ══ 2. BASE RESETS ══ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-padding-top: calc(var(--hdr) + 16px);
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--ink);
  font: 15.5px/1.7 "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

img {
  display: block;
  max-width: 100%;
}

a {
  color: var(--acc);
  text-decoration: none;
  transition: color 0.15s ease;
}

a:hover {
  text-decoration: underline;
}

/* ══ 3. HEADER ══ */
header,
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--hdr);
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 max(20px, calc(50vw - 620px));
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: "Bricolage Grotesque", -apple-system, sans-serif;
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--ink);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.logo:hover {
  text-decoration: none;
}

.logo-mark {
  width: 32px;
  height: 32px;
  border-radius: 9px;
  background: linear-gradient(135deg, var(--acc), #a855f7);
  display: grid;
  place-items: center;
  box-shadow: var(--sh-sm);
  flex-shrink: 0;
}

.hdr-right,
.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 8px 14px;
  border-radius: var(--r);
  font-size: 13.5px;
  font-weight: 600;
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--ink);
  cursor: pointer;
  transition: all 0.15s ease;
  text-decoration: none;
  line-height: 1.2;
}

.btn:hover {
  background: var(--bg2);
  border-color: var(--line-strong);
  text-decoration: none;
}

.btn.p {
  background: var(--acc);
  color: var(--acc-ink);
  border-color: var(--acc);
}

.btn.p:hover {
  background: var(--acc-h);
  border-color: var(--acc-h);
  color: var(--acc-ink);
}

.btn.sm {
  padding: 6px 12px;
  font-size: 12.5px;
}

.theme-toggle {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--r);
  padding: 7px 11px;
  cursor: pointer;
  color: var(--ink);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  transition: all 0.15s;
}

.theme-toggle:hover {
  background: var(--bg2);
  border-color: var(--line-strong);
}

/* ══ 4. ARTICLE LAYOUT (Supports both .article-wrap and .page-body) ══ */
.article-wrap,
.page-body {
  max-width: 1240px;
  margin: 0 auto;
  padding: 36px 20px 80px;
  flex: 1;
  width: 100%;
}

.article-layout,
.layout-2col {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
  align-items: start;
}

@media (min-width: 1024px) {
  .article-layout,
  .layout-2col {
    grid-template-columns: minmax(0, 1fr) 340px;
  }
}

.article-main-col {
  min-width: 0;
}

.article-sidebar-col {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

@media (min-width: 1024px) {
  .article-sidebar-col {
    position: sticky;
    top: 84px;
  }
}

/* ══ 5. NAVIGATION & HEADER ROW ══ */
.art-back-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
  gap: 12px;
  flex-wrap: wrap;
}

.art-back-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--ink2);
  background: var(--panel);
  border: 1px solid var(--line);
  padding: 7px 14px;
  border-radius: var(--r);
  text-decoration: none;
  transition: all 0.15s ease;
  box-shadow: var(--sh-sm);
}

.art-back-btn:hover {
  background: var(--bg2);
  border-color: var(--line-strong);
  color: var(--ink);
  text-decoration: none;
}

/* Meta */
.art-meta-row {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 12px;
  font-size: 13px;
  color: var(--ink3);
}

.art-badge {
  font-size: 11.5px;
  font-weight: 700;
  background: var(--acc-soft);
  color: var(--acc);
  padding: 2px 8px;
  border-radius: 6px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  display: inline-block;
}

.reader-title {
  font-family: "Bricolage Grotesque", -apple-system, sans-serif;
  font-size: 2.3rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.22;
  margin: 12px 0 20px;
  color: var(--ink);
}

@media (max-width: 640px) {
  .reader-title {
    font-size: 1.8rem;
    margin: 10px 0 16px;
  }
}

.reader-tldr {
  background: var(--acc-soft);
  border-left: 4px solid var(--acc);
  padding: 16px 20px;
  border-radius: var(--r);
  font-size: 15.5px;
  line-height: 1.65;
  margin-bottom: 24px;
  color: var(--ink);
}

.reader-tags {
  display: flex;
  gap: 7px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}

.reader-tag {
  font-size: 12px;
  font-weight: 500;
  background: var(--bg2);
  border: 1px solid var(--line);
  padding: 2px 10px;
  border-radius: 999px;
  color: var(--ink2);
}

/* ══ 6. FEATURED PROJECT CARD ══ */
.reader-hero-img {
  width: 100%;
  max-height: 380px;
  aspect-ratio: 16/9;
  object-fit: cover;
  border-radius: var(--r-xl);
  border: 1px solid var(--line);
  margin-bottom: 20px;
  box-shadow: var(--sh);
}

.reader-project-banner {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 16px 20px;
  margin: 16px 0 28px;
  display: flex;
  gap: 16px;
  align-items: center;
  box-shadow: var(--sh-sm);
  flex-wrap: wrap;
}

.reader-project-avatar {
  width: 52px;
  height: 52px;
  border-radius: 12px;
  border: 1px solid var(--line);
  flex-shrink: 0;
  background: #0d1117;
  object-fit: cover;
}

.rpb-details {
  flex: 1;
  min-width: 240px;
}

.rpb-title {
  font-weight: 700;
  font-size: 15px;
  color: var(--ink);
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.rpb-desc {
  font-size: 13px;
  color: var(--ink2);
  margin-top: 4px;
  line-height: 1.5;
}

/* ══ 7. SOCIAL SHARING BAR ══ */
.share-bar {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 14px 18px;
  margin: 24px 0 32px;
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  box-shadow: var(--sh-sm);
}

.share-label {
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--ink3);
  margin-right: 4px;
}

.share-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 13px;
  border-radius: 999px;
  font-size: 12.5px;
  font-weight: 600;
  color: #ffffff;
  text-decoration: none;
  transition: transform 0.12s ease, opacity 0.12s ease;
  cursor: pointer;
  border: none;
  font-family: inherit;
  line-height: 1.3;
}

.share-btn:hover {
  transform: translateY(-1px);
  opacity: 0.92;
  text-decoration: none;
  color: #ffffff;
}

.sb-x { background: #000000; }
[data-theme="dark"] .sb-x { background: #ffffff; color: #000000; }
[data-theme="dark"] .sb-x:hover { color: #000000; }

.sb-linkedin { background: #0a66c2; }
.sb-telegram { background: #2aabee; }
.sb-reddit { background: #ff4500; }
.sb-facebook { background: #1877f2; }
.sb-copy {
  background: var(--bg2);
  color: var(--ink);
  border: 1px solid var(--line);
}
.sb-copy:hover {
  background: var(--line);
  color: var(--ink);
}

@media (max-width: 640px) {
  .share-bar { gap: 8px; padding: 12px 14px; }
  .share-btn { font-size: 11.5px; padding: 5px 10px; }
}

/* ══ 8. SPONSOR / ADVERTISEMENT BOXES ══ */
.sponsor-slot {
  background: linear-gradient(135deg, color-mix(in srgb, var(--acc) 8%, var(--panel)), var(--panel));
  border: 1px solid color-mix(in srgb, var(--acc) 30%, var(--line));
  border-radius: var(--r-lg);
  padding: 20px 24px;
  margin: 32px 0;
  position: relative;
  box-shadow: var(--sh-sm);
}

.sponsor-badge {
  display: inline-block;
  background: var(--acc-soft);
  color: var(--acc);
  font-size: 11px;
  font-weight: 800;
  padding: 2px 8px;
  border-radius: 5px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 8px;
}

.sponsor-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.sponsor-info {
  flex: 1;
  min-width: 260px;
}

.sponsor-title {
  font-family: "Bricolage Grotesque", -apple-system, sans-serif;
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 4px;
}

.sponsor-desc {
  font-size: 13.5px;
  color: var(--ink2);
  line-height: 1.5;
}

.in-article-ad {
  margin: 28px 0;
}

/* ══ 9. ARTICLE CONTENT TYPOGRAPHY ══ */
.reader-content {
  line-height: 1.8;
  color: var(--ink);
  font-size: 16px;
}

.reader-content h2,
.reader-content h3 {
  font-family: "Bricolage Grotesque", -apple-system, sans-serif;
  font-size: 1.45rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 38px 0 14px;
  color: var(--ink);
  line-height: 1.3;
}

.reader-content h4 {
  font-family: "Bricolage Grotesque", -apple-system, sans-serif;
  font-size: 1.18rem;
  font-weight: 700;
  margin: 28px 0 10px;
  color: var(--ink);
}

.reader-content p {
  margin-bottom: 18px;
  color: var(--ink2);
  font-size: 15.5px;
  line-height: 1.8;
}

.reader-content ul,
.reader-content ol {
  padding-left: 24px;
  margin-bottom: 22px;
  color: var(--ink2);
}

.reader-content li {
  margin-bottom: 9px;
  line-height: 1.7;
}

.reader-content strong {
  color: var(--ink);
  font-weight: 700;
}

.reader-content a {
  color: var(--acc);
  text-decoration: underline;
  text-underline-offset: 3px;
  font-weight: 500;
}

.reader-content a:hover {
  color: var(--acc-h);
}

.reader-content code {
  background: var(--bg2);
  padding: 2px 7px;
  border-radius: 5px;
  font-family: "JetBrains Mono", Consolas, Menlo, monospace;
  font-size: 13.5px;
  color: var(--acc);
  border: 1px solid var(--line);
}

.reader-content pre {
  background: var(--bg2);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 18px 20px;
  margin: 24px 0;
  overflow-x: auto;
  font-family: "JetBrains Mono", Consolas, Menlo, monospace;
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--ink);
  box-shadow: var(--sh-sm);
}

.reader-content pre code {
  background: transparent;
  padding: 0;
  border-radius: 0;
  border: none;
  color: inherit;
  font-size: inherit;
}

.reader-content blockquote {
  background: var(--bg2);
  border-left: 4px solid var(--line-strong);
  padding: 16px 20px;
  border-radius: var(--r);
  margin: 24px 0;
  font-style: italic;
  color: var(--ink2);
  line-height: 1.65;
}

.reader-content hr {
  border: 0;
  border-top: 1px solid var(--line);
  margin: 36px 0;
}

.reader-content img {
  border-radius: var(--r-lg);
  border: 1px solid var(--line);
  margin: 24px 0;
  box-shadow: var(--sh-sm);
}

/* ══ 10. SIDEBAR CARDS & WIDGETS ══ */
.sidebar-box {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 18px 20px;
  box-shadow: var(--sh-sm);
}

.sidebar-box-title {
  font-family: "Bricolage Grotesque", -apple-system, sans-serif;
  font-size: 12.5px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--ink2);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 6px;
}

/* ══ 11. MORE ARTICLES SECTION ══ */
.more-sec {
  margin-top: 56px;
  padding-top: 36px;
  border-top: 1px solid var(--line);
}

.more-title {
  font-family: "Bricolage Grotesque", -apple-system, sans-serif;
  font-size: 1.4rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
  color: var(--ink);
}

.more-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
}

.more-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 18px;
  display: flex;
  flex-direction: column;
  text-decoration: none;
  transition: all 0.15s ease;
  box-shadow: var(--sh-sm);
}

.more-card:hover {
  border-color: var(--acc);
  transform: translateY(-2px);
  box-shadow: var(--sh);
  text-decoration: none;
}

.more-card h4 {
  font-family: "Bricolage Grotesque", -apple-system, sans-serif;
  font-size: 1rem;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 6px;
  line-height: 1.35;
}

.more-card p {
  font-size: 13px;
  color: var(--ink2);
  margin-bottom: 12px;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  line-height: 1.5;
}

.more-card span {
  font-size: 12px;
  color: var(--acc);
  font-weight: 600;
}

/* ══ 12. FOOTER ══ */
footer {
  border-top: 1px solid var(--line);
  background: var(--panel);
  padding: 36px 20px;
  text-align: center;
  font-size: 13px;
  color: var(--ink3);
  margin-top: auto;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 18px;
  flex-wrap: wrap;
  margin-bottom: 14px;
}

.footer-links a {
  color: var(--ink2);
  font-weight: 500;
}

.footer-links a:hover {
  color: var(--acc);
}

.footer-social {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-bottom: 16px;
}

.footer-social a {
  color: var(--ink2);
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 13px;
}

/* ══ 13. TOAST NOTIFICATION ══ */
#toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--ink);
  color: var(--bg);
  padding: 10px 20px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  box-shadow: var(--sh-lg);
  transition: transform 0.2s ease;
  z-index: 9999;
  pointer-events: none;
}

#toast.on {
  transform: translateX(-50%) translateY(0);
}