/* ============================================
   Linkgaze Blog — Shared Styles
   ============================================ */

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

:root {
  --color-bg: #ffffff;
  --color-text: #1a1a2e;
  --color-text-secondary: #4a4a68;
  --color-primary: #3b82f6;
  --color-primary-dark: #2563eb;
  --color-primary-light: #dbeafe;
  --color-border: #e5e7eb;
  --color-surface: #f9fafb;
  --color-code-bg: #f3f4f6;
  --color-callout-bg: #fefce8;
  --color-callout-border: #facc15;
  --color-warning-bg: #fef2f2;
  --color-warning-border: #f87171;
  --color-success: #22c55e;
  --color-error: #ef4444;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'Fira Code', 'SF Mono', 'Cascadia Code', monospace;
  --max-width: 720px;
  --max-width-wide: 1280px;
  --radius: 8px;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
}

html {
  font-size: 17px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

/* --- Site Header / Nav --- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}

.site-header__inner {
  max-width: var(--max-width-wide);
  margin: 0 auto;
  padding: 0.85rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.site-header__logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.site-header__logo-icon {
  width: 2rem;
  height: 2rem;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  border-radius: 0.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
}

.site-header__nav {
  display: flex;
  align-items: center;
  gap: 1.75rem;
}

.site-header__nav a {
  color: var(--color-text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.15s;
}

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

.site-header__cta {
  background: var(--color-primary) !important;
  color: #fff !important;
  padding: 0.45rem 1.1rem !important;
  border-radius: 6px;
  font-weight: 600 !important;
  transition: background 0.15s !important;
}

.site-header__cta:hover {
  background: var(--color-primary-dark) !important;
}

/* --- Blog Listing Page --- */
.blog-hero {
  text-align: center;
  padding: 4rem 1.5rem 3rem;
  background: linear-gradient(135deg, var(--color-primary-light) 0%, #eff6ff 100%);
}

.blog-hero h1 {
  font-size: 2.5rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--color-text);
  margin-bottom: 0.75rem;
}

.blog-hero p {
  font-size: 1.15rem;
  color: var(--color-text-secondary);
  max-width: 540px;
  margin: 0 auto;
}

.blog-grid {
  max-width: var(--max-width-wide);
  margin: 0 auto;
  padding: 3rem 1.5rem 5rem;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 2rem;
}

.blog-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: box-shadow 0.2s, transform 0.2s;
  display: flex;
  flex-direction: column;
}

.blog-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.blog-card__img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  background: linear-gradient(135deg, #93c5fd 0%, #60a5fa 100%);
  display: block;
}

img.blog-card__img {
  border-radius: var(--radius) var(--radius) 0 0;
}

.blog-card__body {
  padding: 1.5rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.blog-card__meta {
  display: flex;
  gap: 1rem;
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  margin-bottom: 0.75rem;
}

.blog-card__title {
  font-size: 1.2rem;
  font-weight: 700;
  line-height: 1.35;
  margin-bottom: 0.5rem;
  letter-spacing: -0.01em;
}

.blog-card__title a {
  color: var(--color-text);
  text-decoration: none;
  transition: color 0.15s;
}

.blog-card__title a:hover {
  color: var(--color-primary);
}

.blog-card__excerpt {
  color: var(--color-text-secondary);
  font-size: 0.92rem;
  line-height: 1.6;
  flex: 1;
}

.blog-card__read-more {
  display: inline-block;
  margin-top: 1rem;
  color: var(--color-primary);
  font-weight: 600;
  font-size: 0.9rem;
  text-decoration: none;
  transition: gap 0.15s;
}

.blog-card__read-more:hover {
  text-decoration: underline;
}

/* --- Article Page --- */
.article-header {
  text-align: center;
  padding: 3.5rem 1.5rem 2.5rem;
  background: linear-gradient(135deg, var(--color-primary-light) 0%, #eff6ff 100%);
}

.article-header__breadcrumb {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  margin-bottom: 1.25rem;
}

.article-header__breadcrumb a {
  color: var(--color-primary);
  text-decoration: none;
}

.article-header__breadcrumb a:hover {
  text-decoration: underline;
}

.article-header h1 {
  font-size: 2.35rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.2;
  max-width: 680px;
  margin: 0 auto 1rem;
}

.article-header__image {
  display: block;
  max-width: 760px;
  width: 100%;
  height: auto;
  margin: 1.5rem auto;
  border-radius: var(--radius);
  object-fit: cover;
}

.article-header__meta {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
  font-size: 0.88rem;
  color: var(--color-text-secondary);
}

.article-header__meta span {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
}

/* --- Article Content --- */
.article {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2.5rem 1.5rem 4rem;
}

.article h2 {
  font-size: 1.55rem;
  font-weight: 750;
  letter-spacing: -0.02em;
  margin: 2.5rem 0 0.75rem;
  padding-top: 1rem;
  border-top: 1px solid var(--color-border);
  color: var(--color-text);
}

.article h2:first-child {
  border-top: none;
  margin-top: 0;
  padding-top: 0;
}

.article h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin: 1.75rem 0 0.5rem;
  color: var(--color-text);
}

.article h4 {
  font-size: 1.05rem;
  font-weight: 600;
  margin: 1.25rem 0 0.4rem;
}

.article p {
  margin-bottom: 1rem;
  color: var(--color-text);
}

.article a {
  color: var(--color-primary);
  text-decoration: underline;
  text-decoration-color: rgba(59, 130, 246, 0.3);
  text-underline-offset: 2px;
  transition: text-decoration-color 0.15s;
}

.article a:hover {
  text-decoration-color: var(--color-primary);
}

.article strong {
  font-weight: 650;
}

.article ul,
.article ol {
  margin: 0.5rem 0 1rem 1.25rem;
}

.article li {
  margin-bottom: 0.35rem;
  padding-left: 0.25rem;
}

.article li::marker {
  color: var(--color-primary);
}

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

.article img {
  max-width: 100%;
  border-radius: var(--radius);
  margin: 1rem 0;
}

/* --- Tables --- */
.table-wrap {
  overflow-x: auto;
  margin: 1rem 0 1.5rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}

.article table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.article thead {
  background: var(--color-surface);
}

.article th {
  text-align: left;
  font-weight: 650;
  padding: 0.7rem 1rem;
  border-bottom: 2px solid var(--color-border);
  white-space: nowrap;
}

.article td {
  padding: 0.6rem 1rem;
  border-bottom: 1px solid var(--color-border);
}

.article tbody tr:last-child td {
  border-bottom: none;
}

.article tbody tr:hover {
  background: var(--color-surface);
}

/* --- Code Blocks --- */
.article code {
  font-family: var(--font-mono);
  font-size: 0.85em;
  background: var(--color-code-bg);
  padding: 0.15em 0.4em;
  border-radius: 4px;
}

.article pre {
  background: #1e1e2e;
  color: #cdd6f4;
  padding: 1.25rem 1.5rem;
  border-radius: var(--radius);
  overflow-x: auto;
  margin: 1rem 0 1.5rem;
  font-size: 0.85rem;
  line-height: 1.65;
}

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

.article pre .comment {
  color: #6c7086;
}

.article pre .keyword {
  color: #cba6f7;
}

.article pre .string {
  color: #a6e3a1;
}

/* --- Callout Boxes --- */
.callout {
  padding: 1rem 1.25rem;
  border-radius: var(--radius);
  margin: 1rem 0 1.5rem;
  font-size: 0.92rem;
  line-height: 1.6;
}

.callout--tip {
  background: var(--color-callout-bg);
  border-left: 4px solid var(--color-callout-border);
}

.callout--warning {
  background: var(--color-warning-bg);
  border-left: 4px solid var(--color-warning-border);
}

.callout strong {
  display: inline;
}

/* --- Link Comparison --- */
.link-compare {
  margin: 1rem 0 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.link-compare__bad,
.link-compare__good {
  padding: 0.75rem 1rem;
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  word-break: break-all;
}

.link-compare__bad {
  background: #fef2f2;
  border: 1px solid #fecaca;
}

.link-compare__good {
  background: #f0fdf4;
  border: 1px solid #bbf7d0;
}

/* --- Checklist --- */
.checklist {
  list-style: none;
  margin: 0.5rem 0 1.5rem 0;
  padding: 0;
}

.checklist li {
  position: relative;
  padding: 0.35rem 0 0.35rem 1.75rem;
}

.checklist li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.55rem;
  width: 16px;
  height: 16px;
  border: 2px solid var(--color-border);
  border-radius: 3px;
}

/* --- CTA Section --- */
.cta-section {
  background: linear-gradient(135deg, var(--color-primary-light) 0%, #dbeafe 100%);
  border-radius: var(--radius);
  padding: 2rem 2rem 2.25rem;
  margin: 2.5rem 0 1rem;
  text-align: center;
}

.cta-section h2 {
  border: none !important;
  margin-top: 0 !important;
  padding-top: 0 !important;
  font-size: 1.45rem;
  margin-bottom: 0.75rem;
}

.cta-section p {
  color: var(--color-text-secondary);
  max-width: 520px;
  margin: 0 auto 1rem;
  font-size: 0.95rem;
}

.cta-section ul {
  list-style: none;
  margin: 0 0 1.25rem;
  padding: 0;
  /* display: flex; */
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem 1.5rem;
  font-size: 0.92rem;
  color: var(--color-text-secondary);
}

.cta-section ul li::before {
  content: '\2713';
  color: var(--color-success);
  font-weight: 700;
  margin-right: 0.4rem;
}

.cta-btn {
  display: inline-block;
  background: var(--color-primary);
  color: #fff;
  padding: 0.75rem 2rem;
  border-radius: 8px;
  font-weight: 700;
  font-size: 1rem;
  text-decoration: none;
  transition: background 0.15s, transform 0.1s;
}

.article .cta-btn {
  color: #fff;
  text-decoration: none;
}

.cta-btn:hover,
.article .cta-btn:hover {
  background: var(--color-primary-dark);
  transform: translateY(-1px);
  color: #fff;
  text-decoration: none;
}

/* --- Related Posts --- */
.related-posts {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem 4rem;
}

.related-posts h2 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 1.25rem;
}

.related-posts__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}

.related-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.25rem;
  text-decoration: none;
  color: var(--color-text);
  transition: box-shadow 0.2s, transform 0.15s;
}

.related-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.related-card__title {
  font-weight: 650;
  font-size: 0.95rem;
  margin-bottom: 0.35rem;
  line-height: 1.35;
}

.related-card__desc {
  color: var(--color-text-secondary);
  font-size: 0.82rem;
  line-height: 1.5;
}

/* --- Site Footer --- */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding: 2rem 1.5rem;
  text-align: center;
  font-size: 0.85rem;
  color: var(--color-text-secondary);
}

.site-footer a {
  color: var(--color-primary);
  text-decoration: none;
}

.site-footer a:hover {
  text-decoration: underline;
}

/* --- Responsive --- */
@media (max-width: 768px) {
  html {
    font-size: 16px;
  }

  .blog-hero h1 {
    font-size: 1.85rem;
  }

  .blog-hero p {
    font-size: 1rem;
  }

  .blog-grid {
    grid-template-columns: 1fr;
    padding: 2rem 1rem 3rem;
  }

  .article-header h1 {
    font-size: 1.65rem;
  }

  .article-header {
    padding: 2.5rem 1rem 2rem;
  }

  .article {
    padding: 2rem 1rem 3rem;
  }

  .article h2 {
    font-size: 1.35rem;
  }

  .article pre {
    padding: 1rem;
    font-size: 0.8rem;
    border-radius: 6px;
  }

  .cta-section {
    padding: 1.5rem 1.25rem 1.75rem;
  }

  .related-posts__grid {
    grid-template-columns: 1fr;
  }

  .site-header__nav {
    gap: 1rem;
  }

  .site-header__nav .nav-hide-mobile {
    display: none;
  }
}

@media (max-width: 480px) {
  .blog-hero {
    padding: 3rem 1rem 2rem;
  }

  .blog-hero h1 {
    font-size: 1.6rem;
  }

  .article-header h1 {
    font-size: 1.45rem;
  }

  .article-header__meta {
    flex-direction: column;
    gap: 0.25rem;
  }
}