/* ── Variables ── */

:root {
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-tertiary: #334155;
  --bg-hover: #475569;
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --border: #334155;
  --accent: #22c55e;
  --accent-hover: #16a34a;
  --accent-subtle: rgba(34, 197, 94, 0.1);
  --danger: #ef4444;
  --warning: #f59e0b;
  --info: #3b82f6;
  --radius: 8px;
  --radius-lg: 12px;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  --font-mono: 'SF Mono', 'Fira Code', 'JetBrains Mono', monospace;
  --max-width: 1200px;
  --content-width: 720px;
  --transition: 0.2s ease;
}

/* ── Reset ── */

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  font-size: 16px;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--accent-hover);
}

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

/* ── Layout ── */

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.container--narrow {
  max-width: var(--content-width);
}

.main-content {
  flex: 1;
  padding: 3rem 0;
}

/* ── Header ── */

.site-header {
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(12px);
  background: rgba(30, 41, 59, 0.92);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.site-logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: -0.02em;
}

.site-logo:hover {
  color: var(--accent-hover);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.site-nav a {
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color var(--transition);
  position: relative;
}

.site-nav a:hover {
  color: var(--text-primary);
}

.site-nav a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width var(--transition);
}

.site-nav a:hover::after {
  width: 100%;
}

/* ── Footer ── */

.site-footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  padding: 2.5rem 0;
  margin-top: auto;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-brand {
  font-weight: 600;
  color: var(--accent);
  font-size: 1rem;
}

.footer-copy {
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* ── Breadcrumb ── */

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

.breadcrumb a {
  color: var(--text-muted);
}

.breadcrumb a:hover {
  color: var(--accent);
}

.breadcrumb__sep {
  color: var(--text-muted);
  opacity: 0.5;
}

/* ── Blog Post ── */

.blog-post {
  padding: 1rem 0;
}

.post-header {
  margin-bottom: 3rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--border);
}

.post-title {
  font-size: 2.5rem;
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.03em;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.post-meta {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.post-date {
  color: var(--text-muted);
}

.post-body {
  margin-bottom: 3rem;
}

.post-footer {
  padding-top: 2rem;
  border-top: 1px solid var(--border);
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
}

.back-link:hover {
  color: var(--accent);
}

.post-image {
  border-radius: var(--radius-lg);
  margin: 1.5rem 0;
}

/* ── Prose (Rendered Markdown) ── */

.prose h1 {
  font-size: 2rem;
  font-weight: 800;
  margin: 2.5rem 0 1rem;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.prose h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 2rem 0 0.75rem;
  line-height: 1.3;
  letter-spacing: -0.01em;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
}

.prose h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin: 1.75rem 0 0.5rem;
  line-height: 1.4;
}

.prose h4 {
  font-size: 1.1rem;
  font-weight: 600;
  margin: 1.5rem 0 0.5rem;
  color: var(--text-secondary);
}

.prose p {
  margin-bottom: 1.25rem;
  color: var(--text-secondary);
  line-height: 1.8;
}

.prose strong {
  color: var(--text-primary);
  font-weight: 600;
}

.prose em {
  font-style: italic;
}

.prose a {
  color: var(--accent);
  text-decoration: underline;
  text-decoration-color: rgba(34, 197, 94, 0.3);
  text-underline-offset: 3px;
  transition: text-decoration-color var(--transition);
}

.prose a:hover {
  text-decoration-color: var(--accent);
}

.prose ul,
.prose ol {
  margin: 0 0 1.25rem 1.5rem;
  color: var(--text-secondary);
}

.prose ul {
  list-style-type: disc;
}

.prose ol {
  list-style-type: decimal;
}

.prose li {
  margin-bottom: 0.5rem;
  line-height: 1.7;
}

.prose li::marker {
  color: var(--accent);
}

.prose blockquote {
  border-left: 3px solid var(--accent);
  padding: 0.75rem 1.25rem;
  margin: 1.5rem 0;
  background: var(--accent-subtle);
  border-radius: 0 var(--radius) var(--radius) 0;
  color: var(--text-secondary);
}

.prose blockquote p {
  margin-bottom: 0;
}

.prose code {
  background: var(--bg-tertiary);
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.875em;
  color: var(--accent);
}

.prose pre {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  padding: 1.25rem;
  border-radius: var(--radius);
  overflow-x: auto;
  margin: 1.5rem 0;
  line-height: 1.6;
}

.prose pre code {
  background: none;
  padding: 0;
  border-radius: 0;
  font-size: 0.875rem;
  color: var(--text-primary);
}

.prose hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 2.5rem 0;
}

.prose img {
  border-radius: var(--radius-lg);
  margin: 1.5rem 0;
}

.prose table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: 0.9rem;
}

.prose th,
.prose td {
  padding: 0.75rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

.prose th {
  font-weight: 600;
  color: var(--text-primary);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.prose td {
  color: var(--text-secondary);
}

.prose tr:hover td {
  background: rgba(51, 65, 85, 0.3);
}

/* ── Collection / Blog Index ── */

.collection-header {
  margin-bottom: 2.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
}

.collection-title {
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 0.25rem;
}

.collection-count {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.post-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 1.5rem;
}

/* ── Post Card ── */

.post-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color var(--transition), transform var(--transition);
}

.post-card:hover {
  border-color: var(--bg-hover);
  transform: translateY(-2px);
}

.post-card__image {
  aspect-ratio: 16 / 9;
  overflow: hidden;
}

.post-card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition);
}

.post-card:hover .post-card__image img {
  transform: scale(1.03);
}

.post-card__content {
  padding: 1.25rem 1.5rem 1.5rem;
}

.post-card__category {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  background: var(--accent-subtle);
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  margin-bottom: 0.75rem;
}

.post-card__title {
  font-size: 1.15rem;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 0.5rem;
}

.post-card__title a {
  color: var(--text-primary);
  transition: color var(--transition);
}

.post-card__title a:hover {
  color: var(--accent);
}

.post-card__excerpt {
  color: var(--text-muted);
  font-size: 0.875rem;
  line-height: 1.6;
  margin-bottom: 0.75rem;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.post-card__meta {
  display: flex;
  align-items: center;
  gap: 1rem;
  color: var(--text-muted);
  font-size: 0.8rem;
}

/* ── Page Sections ── */

.page-section {
  margin-bottom: 3rem;
}

.page-section:last-child {
  margin-bottom: 0;
}

/* ── Responsive ── */

@media (max-width: 768px) {
  .header-inner {
    height: 56px;
  }

  .site-nav {
    gap: 1.25rem;
  }

  .site-nav a {
    font-size: 0.85rem;
  }

  .post-title {
    font-size: 1.75rem;
  }

  .prose h1 {
    font-size: 1.5rem;
  }

  .prose h2 {
    font-size: 1.25rem;
  }

  .post-grid {
    grid-template-columns: 1fr;
  }

  .collection-title {
    font-size: 1.5rem;
  }

  .footer-inner {
    flex-direction: column;
    gap: 0.5rem;
    text-align: center;
  }

  .container {
    padding: 0 1rem;
  }

  .main-content {
    padding: 2rem 0;
  }
}

@media (max-width: 480px) {
  .site-nav {
    gap: 0.75rem;
  }

  .post-title {
    font-size: 1.5rem;
  }

  .post-card__content {
    padding: 1rem 1.25rem 1.25rem;
  }
}


/* Component Styles */
/* Component: Hero Section */
.hero { text-align: center; padding: 5rem 2rem; background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-primary) 100%); border-bottom: 1px solid var(--border); } .hero__title { font-size: 3rem; font-weight: 800; letter-spacing: -0.03em; margin-bottom: 1rem; background: linear-gradient(135deg, var(--text-primary), var(--accent)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; } .hero__subtitle { font-size: 1.25rem; color: var(--text-secondary); max-width: 600px; margin: 0 auto; line-height: 1.6; } @media (max-width: 768px) { .hero { padding: 3rem 1rem; } .hero__title { font-size: 2rem; } }

/* Component: Post Card */
.post-card { border: 1px solid var(--border); border-radius: 8px; padding: 1.5rem; } .post-card h3 { margin: 0 0 0.5rem; } .excerpt { color: var(--text-secondary); } .meta { font-size: 0.875rem; opacity: 0.7; }

/* Component: Post Grid */
.post-grid-section { padding: 2rem 0; } .post-grid-section__heading { font-size: 1.75rem; font-weight: 700; margin-bottom: 1.5rem; letter-spacing: -0.02em; }

/* Component: Newsletter CTA */
.newsletter { text-align: center; padding: 3rem 2rem; background: var(--bg-secondary); border-radius: var(--radius-lg); border: 1px solid var(--border); margin-top: 1rem; } .newsletter__heading { font-size: 1.5rem; font-weight: 700; margin-bottom: 0.5rem; } .newsletter__desc { color: var(--text-secondary); margin-bottom: 1.5rem; } .newsletter__form { display: flex; gap: 0.75rem; max-width: 400px; margin: 0 auto; } .newsletter__input { flex: 1; padding: 0.6rem 1rem; border-radius: var(--radius); border: 1px solid var(--border); background: var(--bg-primary); color: var(--text-primary); font-size: 0.9rem; } .newsletter__btn { padding: 0.6rem 1.5rem; border-radius: var(--radius); border: none; background: var(--accent); color: #fff; font-weight: 600; cursor: pointer; transition: background var(--transition); } .newsletter__btn:hover { background: var(--accent-hover); } @media (max-width: 480px) { .newsletter__form { flex-direction: column; } }

/* Component: CTA Banner */
.cta-banner { text-align: center; padding: 4rem 2rem; background: linear-gradient(135deg, var(--bg-secondary) 0%, rgba(34, 197, 94, 0.08) 100%); border: 1px solid var(--border); border-radius: var(--radius-lg); margin: 1rem 0; }
.cta-banner__heading { font-size: 2rem; font-weight: 800; letter-spacing: -0.02em; margin-bottom: 0.75rem; }
.cta-banner__desc { color: var(--text-secondary); font-size: 1.1rem; max-width: 560px; margin: 0 auto 1.5rem; line-height: 1.6; }
.cta-banner__actions { display: flex; gap: 0.75rem; justify-content: center; flex-wrap: wrap; }
.cta-banner__btn { display: inline-flex; align-items: center; padding: 0.7rem 1.75rem; border-radius: var(--radius); font-weight: 600; font-size: 0.95rem; text-decoration: none; transition: all var(--transition); }
.cta-banner__btn--primary { background: var(--accent); color: #fff; }
.cta-banner__btn--primary:hover { background: var(--accent-hover); }
.cta-banner__btn--secondary { border: 1px solid var(--border); color: var(--text-secondary); background: transparent; }
.cta-banner__btn--secondary:hover { border-color: var(--accent); color: var(--accent); }
.cta-banner__btn--secondary:empty { display: none; }
@media (max-width: 768px) { .cta-banner { padding: 3rem 1rem; } .cta-banner__heading { font-size: 1.5rem; } }

/* Component: Feature Card */
.feature-card { background: var(--bg-secondary); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 1.5rem; transition: border-color var(--transition), transform var(--transition); }
.feature-card:hover { border-color: var(--bg-hover); transform: translateY(-2px); }
.feature-card__icon { font-size: 2rem; margin-bottom: 0.75rem; }
.feature-card__title { font-size: 1.1rem; font-weight: 700; margin-bottom: 0.5rem; line-height: 1.3; }
.feature-card__desc { color: var(--text-muted); font-size: 0.875rem; line-height: 1.6; }

/* Component: Feature Grid */
.feature-grid-section { padding: 2rem 0; }
.feature-grid-section__heading { font-size: 1.75rem; font-weight: 700; margin-bottom: 0.5rem; letter-spacing: -0.02em; }
.feature-grid-section__subheading { color: var(--text-muted); font-size: 1rem; margin-bottom: 1.5rem; line-height: 1.6; }
.feature-grid-section__subheading:empty { display: none; }
.feature-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 1.25rem; }
@media (max-width: 768px) { .feature-grid { grid-template-columns: 1fr; } }

/* Component: Stats Row */
.stats-row { display: flex; justify-content: center; gap: 3rem; padding: 3rem 2rem; background: var(--bg-secondary); border: 1px solid var(--border); border-radius: var(--radius-lg); text-align: center; }
.stats-row__item { flex: 1; max-width: 200px; }
.stats-row__item--optional:has(.stats-row__value:empty) { display: none; }
.stats-row__value { font-size: 2.5rem; font-weight: 800; color: var(--accent); letter-spacing: -0.02em; line-height: 1.2; margin-bottom: 0.25rem; }
.stats-row__value:empty { display: none; }
.stats-row__label { font-size: 0.8rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.06em; font-weight: 600; }
.stats-row__label:empty { display: none; }
@media (max-width: 768px) { .stats-row { flex-wrap: wrap; gap: 1.5rem; padding: 2rem 1rem; } .stats-row__item { flex-basis: 40%; } .stats-row__value { font-size: 2rem; } }

/* Component: Text Block */
.text-block { padding: 2rem 0; max-width: var(--content-width); margin: 0 auto; }
.text-block__heading { font-size: 1.75rem; font-weight: 700; margin-bottom: 1.25rem; letter-spacing: -0.02em; }
.text-block__heading:empty { display: none; }

/* Component: Testimonial Card */
.testimonial-card { background: var(--bg-secondary); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 1.5rem; position: relative; }
.testimonial-card::before { content: "\201C"; position: absolute; top: 0.5rem; left: 1rem; font-size: 3rem; color: var(--accent); opacity: 0.3; line-height: 1; font-family: Georgia, serif; }
.testimonial-card__quote { color: var(--text-secondary); font-size: 0.95rem; line-height: 1.7; font-style: italic; margin-bottom: 1rem; padding-top: 1rem; }
.testimonial-card__author { border-top: 1px solid var(--border); padding-top: 0.75rem; }
.testimonial-card__name { font-weight: 600; font-size: 0.9rem; color: var(--text-primary); }
.testimonial-card__role { font-size: 0.8rem; color: var(--text-muted); }
.testimonial-card__role:empty { display: none; }

/* Component: Testimonial Section */
.testimonial-section { padding: 2rem 0; }
.testimonial-section__heading { font-size: 1.75rem; font-weight: 700; margin-bottom: 1.5rem; letter-spacing: -0.02em; }
.testimonial-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 1.25rem; }
@media (max-width: 768px) { .testimonial-grid { grid-template-columns: 1fr; } }

/* Component: Code Showcase */
.code-showcase { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; align-items: center; padding: 2rem 0; }
.code-showcase__heading { font-size: 1.5rem; font-weight: 700; margin-bottom: 0.75rem; letter-spacing: -0.02em; }
.code-showcase__heading:empty { display: none; }
.code-showcase__desc { color: var(--text-secondary); line-height: 1.7; font-size: 0.95rem; }
.code-showcase__desc:empty { display: none; }
.code-showcase__code { position: relative; background: var(--bg-secondary); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
.code-showcase__lang { position: absolute; top: 0.5rem; right: 0.75rem; font-size: 0.7rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.05em; font-weight: 600; }
.code-showcase__lang:empty { display: none; }
.code-showcase__code pre { padding: 1.25rem; margin: 0; overflow-x: auto; line-height: 1.6; }
.code-showcase__code code { font-family: var(--font-mono); font-size: 0.875rem; color: var(--text-primary); }
@media (max-width: 768px) { .code-showcase { grid-template-columns: 1fr; } }

/* Component: Logo Cloud */
.logo-cloud { text-align: center; padding: 2.5rem 2rem; }
.logo-cloud__heading { font-size: 0.8rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.08em; color: var(--text-muted); margin-bottom: 1.5rem; }
.logo-cloud__heading:empty { display: none; }
.logo-cloud__grid { display: flex; align-items: center; justify-content: center; gap: 3rem; flex-wrap: wrap; }
.logo-cloud__grid img { max-height: 36px; filter: grayscale(1) brightness(0.7); opacity: 0.6; transition: all var(--transition); }
.logo-cloud__grid img:hover { filter: none; opacity: 1; }
.logo-cloud__badge { display: inline-flex; align-items: center; gap: 0.5rem; padding: 0.4rem 1rem; background: var(--bg-secondary); border: 1px solid var(--border); border-radius: 999px; color: var(--text-secondary); font-size: 0.85rem; font-weight: 500; }
.logo-cloud__badge:hover { border-color: var(--accent); color: var(--accent); }
@media (max-width: 768px) { .logo-cloud__grid { gap: 1.5rem; } }

/* Component: Divider */
.section-divider { margin: 2rem auto; max-width: 200px; }
.section-divider--line { border-top: 1px solid var(--border); }
.section-divider--dots { text-align: center; border: none; }
.section-divider--dots::before { content: "\00B7\00A0\00A0\00B7\00A0\00A0\00B7"; font-size: 1.5rem; color: var(--text-muted); letter-spacing: 0.5em; }
.section-divider--space { border: none; height: 3rem; }