/* ============================================
   BLOG CSS — RestoSuite AI
   ============================================ */

/* Reuse landing CSS variables inline in each HTML,
   this file handles blog-specific layout only. */

.blog-body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--bg-base);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ---- Article layout ---- */
.blog-article {
  max-width: 720px;
  margin: 0 auto;
  padding: 120px 24px 80px;
}

.blog-article h1 {
  font-size: 2.25rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.2;
  margin-bottom: 16px;
}

@media (min-width: 768px) {
  .blog-article h1 { font-size: 2.75rem; }
}

.blog-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  font-size: 0.875rem;
  color: var(--text-tertiary);
  margin-bottom: 32px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-light);
}

.blog-meta span {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

/* ---- Body text ---- */
.blog-content {
  font-size: 1.125rem;
  line-height: 1.8;
  color: var(--text-primary);
}

.blog-content p {
  margin-bottom: 1.5em;
}

.blog-content h2 {
  font-size: 1.625rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-top: 2.5em;
  margin-bottom: 0.75em;
  color: var(--text-primary);
}

.blog-content h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-top: 2em;
  margin-bottom: 0.5em;
  color: var(--text-primary);
}

.blog-content ul,
.blog-content ol {
  margin-bottom: 1.5em;
  padding-left: 1.5em;
}

.blog-content li {
  margin-bottom: 0.5em;
  line-height: 1.7;
}

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

.blog-content a {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color 0.15s ease;
}
.blog-content a:hover {
  color: var(--color-accent-hover);
}

/* ---- Code / formulas ---- */
.blog-content code,
.blog-content .formula {
  font-family: var(--font-mono);
  font-size: 0.95em;
  background: var(--bg-elevated);
  border: 1px solid var(--border-light);
  border-radius: 4px;
  padding: 2px 8px;
}

.formula-block {
  display: block;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 500;
  background: var(--bg-elevated);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  margin: 1.5em 0;
  color: var(--color-accent);
}

/* ---- Tables ---- */
.blog-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5em 0;
  font-size: 0.9375rem;
}

.blog-content thead th {
  text-align: left;
  font-weight: 600;
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
  padding: 12px 16px;
  border-bottom: 2px solid var(--border-default);
  background: var(--bg-elevated);
}

.blog-content tbody td {
  padding: 10px 16px;
  border-bottom: 1px solid var(--border-light);
  color: var(--text-secondary);
}

.blog-content tbody tr:hover {
  background: rgba(42, 63, 107, 0.15);
}

.blog-content tbody td:first-child {
  color: var(--text-primary);
  font-weight: 500;
}

/* ---- Blockquotes ---- */
.blog-content blockquote {
  border-left: 3px solid var(--color-accent);
  background: var(--bg-elevated);
  margin: 1.5em 0;
  padding: 16px 24px;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  font-style: italic;
  color: var(--text-secondary);
}

.blog-content blockquote strong {
  color: var(--color-accent);
  font-style: normal;
}

/* ---- TOC ---- */
.blog-toc {
  background: var(--bg-elevated);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 20px 24px;
  margin-bottom: 2em;
}

.blog-toc__title {
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-tertiary);
  margin-bottom: 12px;
}

.blog-toc ol {
  list-style: decimal;
  padding-left: 1.25em;
  margin: 0;
}

.blog-toc li {
  margin-bottom: 6px;
}

.blog-toc a {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.15s ease;
}

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

/* ---- CTA box ---- */
.blog-cta {
  background: linear-gradient(135deg, rgba(232,114,42,0.12), rgba(232,114,42,0.04));
  border: 1px solid rgba(232,114,42,0.25);
  border-radius: var(--radius-xl);
  padding: 32px;
  text-align: center;
  margin: 3em 0 1em;
}

.blog-cta h3 {
  font-size: 1.375rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.blog-cta p {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: 20px;
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
}

.blog-cta .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  border: none;
  border-radius: 10px;
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s ease;
  white-space: nowrap;
  background: var(--color-accent);
  color: #fff;
  box-shadow: 0 4px 16px rgba(232,114,42,0.3);
  text-decoration: none;
}

.blog-cta .btn:hover {
  background: var(--color-accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(232,114,42,0.4);
}

.blog-cta .blog-cta__note {
  font-size: 0.8125rem;
  color: var(--text-tertiary);
  margin-top: 12px;
  margin-bottom: 0;
}

/* ---- Emoji callouts ---- */
.blog-callout {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  background: var(--bg-elevated);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  margin: 1.5em 0;
}

.blog-callout__emoji {
  font-size: 1.5rem;
  flex-shrink: 0;
  line-height: 1.4;
}

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

/* ============================================
   BLOG INDEX — Card grid
   ============================================ */
.blog-index {
  max-width: 960px;
  margin: 0 auto;
  padding: 120px 24px 80px;
}

.blog-index__title {
  font-size: 2.25rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  text-align: center;
  margin-bottom: 8px;
}

.blog-index__subtitle {
  font-size: 1.0625rem;
  color: var(--text-secondary);
  text-align: center;
  margin-bottom: 48px;
}

.blog-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

@media (min-width: 640px) {
  .blog-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 960px) {
  .blog-grid { grid-template-columns: repeat(3, 1fr); }
}

.blog-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-xl);
  padding: 28px;
  display: flex;
  flex-direction: column;
  transition: all 0.2s ease;
  text-decoration: none;
  color: inherit;
  position: relative;
  overflow: hidden;
}

.blog-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--color-accent);
  transform: scaleX(0);
  transition: transform 0.3s ease;
  transform-origin: left;
}

.blog-card:hover {
  border-color: var(--border-default);
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.4);
}

.blog-card:hover::before {
  transform: scaleX(1);
}

.blog-card__emoji {
  font-size: 2rem;
  margin-bottom: 16px;
}

.blog-card__title {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 8px;
  line-height: 1.35;
}

.blog-card__desc {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.6;
  flex: 1;
  margin-bottom: 16px;
}

.blog-card__meta {
  font-size: 0.8125rem;
  color: var(--text-tertiary);
  display: flex;
  align-items: center;
  gap: 8px;
}

.blog-card__read {
  font-size: 0.875rem;
  color: var(--color-accent);
  font-weight: 500;
  margin-top: 12px;
}

/* ---- Header for blog pages ---- */
.blog-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(15,23,35,0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-light);
}

.blog-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.blog-header__logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.125rem;
  font-weight: 600;
  text-decoration: none;
  color: inherit;
}

.blog-header__logo span { font-weight: 700; }

.blog-header__logo-ai {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--color-accent);
  color: #fff;
  font-size: 0.6875rem;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 6px;
  margin-left: 2px;
}

.blog-header__nav {
  display: flex;
  align-items: center;
  gap: 24px;
}

.blog-header__nav a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.15s ease;
}

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

.blog-header__cta {
  display: none;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border: none;
  border-radius: 10px;
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  background: var(--color-accent);
  color: #fff;
  text-decoration: none;
  transition: all 0.15s ease;
}

.blog-header__cta:hover {
  background: var(--color-accent-hover);
}

@media (min-width: 768px) {
  .blog-header__cta { display: inline-flex; }
}

/* ---- Footer for blog ---- */
.blog-footer {
  border-top: 1px solid var(--border-light);
  padding: 40px 24px;
  text-align: center;
}

.blog-footer__inner {
  max-width: 720px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

.blog-footer__links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 20px;
}

.blog-footer__links a {
  font-size: 0.8125rem;
  color: var(--text-tertiary);
  text-decoration: none;
  transition: color 0.15s ease;
}

.blog-footer__links a:hover {
  color: var(--text-secondary);
}

.blog-footer__copy {
  font-size: 0.75rem;
  color: var(--text-tertiary);
}

/* ---- Responsive ---- */
@media (max-width: 640px) {
  .blog-article { padding-top: 96px; }
  .blog-index { padding-top: 96px; }
  .blog-article h1 { font-size: 1.75rem; }
  .blog-index__title { font-size: 1.75rem; }
  .blog-content { font-size: 1rem; }
  .blog-content h2 { font-size: 1.375rem; }
  .blog-content table { font-size: 0.8125rem; }
  .blog-content thead th,
  .blog-content tbody td { padding: 8px 10px; }
  .blog-cta { padding: 24px 20px; }
}