/* ============================================
   GridSutra — Shared Styles
   File: gridsutra-shared.css
   Location: /wp-content/themes/astra/
============================================ */

/* ── RESET FOR ASTRA CONFLICTS ── */
.gs-header, .gs-header *, .gs-blog *, .gs-single *, .gs-category * {
  box-sizing: border-box;
}

.gs-header a, .gs-blog a, .gs-single a, .gs-category a {
  text-decoration: none;
}

/* ── CSS VARIABLES ── */
:root {
  --gs-bg:        #FFFFFF;
  --gs-surface:   #F5F5F7;
  --gs-border:    rgba(0,0,0,0.08);
  --gs-accent:    #0A84FF;
  --gs-accent-dim:rgba(10,132,255,0.10);
  --gs-text:      #1D1D1F;
  --gs-text-2:    #515154;
  --gs-text-3:    #86868B;
  --gs-radius:    14px;
  --gs-shadow:    0 2px 20px rgba(0,0,0,0.07);
}

/* ══════════════════════════════════════
   HEADER
══════════════════════════════════════ */
.gs-header {
  position: fixed;
  top: 16px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 9999;
  width: calc(100% - 80px);
  max-width: 1000px;
}

.gs-nav {
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px 0 16px;
  background: rgba(255,255,255,0.85);
  backdrop-filter: blur(24px) saturate(2);
  -webkit-backdrop-filter: blur(24px) saturate(2);
  border: 1px solid rgba(0,0,0,0.09);
  border-radius: 16px;
  box-shadow: 0 4px 24px rgba(0,0,0,0.07), 0 1px 2px rgba(0,0,0,0.04);
}

.gs-logo {
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: -0.4px;
  color: var(--gs-text);
  font-family: 'Inter', -apple-system, sans-serif;
}

.gs-logo-icon {
  width: 30px; height: 30px;
  background: var(--gs-accent);
  border-radius: 8px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: 1fr 1fr;
  gap: 3px;
  padding: 6px;
  box-shadow: 0 2px 8px rgba(10,132,255,0.35);
  flex-shrink: 0;
}

.gs-logo-icon span {
  background: white;
  border-radius: 2px;
  display: block;
}

.gs-logo-icon span:first-child { grid-column: span 2; }

.gs-nav-links {
  display: flex;
  align-items: center;
  gap: 2px;
  list-style: none;
  margin: 0; padding: 0;
}

.gs-nav-links a {
  font-size: 13px;
  font-weight: 500;
  color: var(--gs-text-2);
  padding: 6px 12px;
  border-radius: 8px;
  transition: color 0.2s, background 0.2s;
  font-family: 'Inter', -apple-system, sans-serif;
  display: block;
}

.gs-nav-links a:hover { color: var(--gs-text); background: rgba(0,0,0,0.05); }
.gs-nav-links a.active { color: var(--gs-accent); }

.gs-nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 600;
  color: white;
  background: var(--gs-accent);
  padding: 7px 16px;
  border-radius: 10px;
  transition: transform 0.2s, box-shadow 0.2s;
  box-shadow: 0 2px 8px rgba(10,132,255,0.3);
  font-family: 'Inter', -apple-system, sans-serif;
  white-space: nowrap;
}

.gs-nav-cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(10,132,255,0.4);
  color: white;
}

/* Mobile menu button */
.gs-mobile-menu {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
  border-radius: 8px;
}

.gs-mobile-menu span {
  display: block;
  width: 18px; height: 2px;
  background: var(--gs-text);
  border-radius: 2px;
  transition: all 0.2s;
}

/* Mobile dropdown */
.gs-mobile-dropdown {
  display: none;
  flex-direction: column;
  gap: 2px;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(24px);
  border: 1px solid var(--gs-border);
  border-radius: 16px;
  margin-top: 8px;
  padding: 12px;
  box-shadow: 0 8px 30px rgba(0,0,0,0.12);
}

.gs-mobile-dropdown a {
  font-size: 14px;
  font-weight: 500;
  color: var(--gs-text-2);
  padding: 10px 14px;
  border-radius: 10px;
  transition: background 0.15s, color 0.15s;
  font-family: 'Inter', -apple-system, sans-serif;
  display: block;
}

.gs-mobile-dropdown a:hover { background: var(--gs-surface); color: var(--gs-text); }

.gs-mobile-cta {
  background: var(--gs-accent) !important;
  color: white !important;
  text-align: center;
  margin-top: 6px;
  font-weight: 600 !important;
}

.gs-mobile-dropdown.open { display: flex; }

/* ══════════════════════════════════════
   PAGE WRAPPER (push content below fixed header)
══════════════════════════════════════ */
.gs-page-wrap {
  padding-top: 90px;
  min-height: 100vh;
  background: var(--gs-bg);
  font-family: 'Inter', -apple-system, sans-serif;
  color: var(--gs-text);
  -webkit-font-smoothing: antialiased;
}

/* ══════════════════════════════════════
   BLOG INDEX PAGE
══════════════════════════════════════ */
.gs-blog-hero {
  padding: 60px 40px 50px;
  max-width: 1100px;
  margin: 0 auto;
}

.gs-blog-eyebrow {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.8px;
  text-transform: uppercase;
  color: var(--gs-accent);
  display: block;
  margin-bottom: 12px;
}

.gs-blog-hero h1 {
  font-size: clamp(32px, 5vw, 52px);
  font-weight: 700;
  letter-spacing: -2px;
  line-height: 1.1;
  color: var(--gs-text);
  margin-bottom: 14px;
}

.gs-blog-hero p {
  font-size: 16px;
  color: var(--gs-text-2);
  max-width: 480px;
  line-height: 1.7;
}

/* Category filter */
.gs-category-filter {
  display: flex;
  gap: 8px;
  padding: 0 40px 40px;
  max-width: 1100px;
  margin: 0 auto;
  flex-wrap: wrap;
}

.gs-cat-btn {
  font-size: 13px;
  font-weight: 500;
  color: var(--gs-text-2);
  background: var(--gs-surface);
  border: 1px solid var(--gs-border);
  border-radius: 20px;
  padding: 6px 16px;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.2s;
  font-family: 'Inter', -apple-system, sans-serif;
}

.gs-cat-btn:hover, .gs-cat-btn.active {
  background: var(--gs-accent);
  color: white;
  border-color: var(--gs-accent);
}

/* Posts grid */
.gs-posts-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  padding: 0 40px 80px;
  max-width: 1100px;
  margin: 0 auto;
}

.gs-post-card {
  background: white;
  border: 1px solid var(--gs-border);
  border-radius: var(--gs-radius);
  overflow: hidden;
  transition: transform 0.3s, box-shadow 0.3s, border-color 0.3s;
  box-shadow: var(--gs-shadow);
}

.gs-post-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 40px rgba(0,0,0,0.10);
  border-color: rgba(10,132,255,0.2);
}

.gs-post-thumb {
  height: 180px;
  background: linear-gradient(135deg, #EEF5FF, #E4EFFF);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.gs-post-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.gs-post-thumb-placeholder {
  color: var(--gs-accent);
  opacity: 0.3;
}

.gs-post-thumb-placeholder svg { width: 48px; height: 48px; }

.gs-post-body { padding: 22px; }

.gs-post-cat {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.8px;
  text-transform: uppercase;
  color: var(--gs-accent);
  margin-bottom: 8px;
  display: block;
}

.gs-post-card h2 {
  font-size: 16px;
  font-weight: 600;
  letter-spacing: -0.3px;
  line-height: 1.5;
  color: var(--gs-text);
  margin-bottom: 10px;
}

.gs-post-card p {
  font-size: 13px;
  color: var(--gs-text-3);
  line-height: 1.65;
  margin-bottom: 0;
}

.gs-post-meta {
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--gs-border);
  font-size: 12px;
  color: var(--gs-text-3);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.gs-read-more {
  font-size: 12px;
  font-weight: 600;
  color: var(--gs-accent);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: gap 0.2s;
}

.gs-post-card:hover .gs-read-more { gap: 7px; }

/* No posts */
.gs-no-posts {
  text-align: center;
  padding: 80px 40px;
  color: var(--gs-text-3);
  grid-column: span 3;
}

.gs-no-posts h3 { font-size: 20px; font-weight: 600; color: var(--gs-text-2); margin-bottom: 8px; }

/* ══════════════════════════════════════
   PAGINATION
══════════════════════════════════════ */
.gs-pagination {
  display: flex;
  justify-content: center;
  gap: 6px;
  padding: 0 40px 80px;
  max-width: 1100px;
  margin: 0 auto;
}

.gs-pagination .page-numbers {
  width: 36px; height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 600;
  border: 1px solid var(--gs-border);
  color: var(--gs-text-2);
  transition: all 0.2s;
  font-family: 'Inter', -apple-system, sans-serif;
  text-decoration: none;
  background: white;
  list-style: none;
}

.gs-pagination .page-numbers:hover {
  background: var(--gs-surface);
  color: var(--gs-text);
}

.gs-pagination .page-numbers.current {
  background: var(--gs-accent);
  color: white;
  border-color: var(--gs-accent);
}

.gs-pagination ul {
  display: flex;
  gap: 6px;
  list-style: none;
  margin: 0; padding: 0;
}

.gs-pagination li { list-style: none; }

/* ══════════════════════════════════════
   SINGLE POST PAGE
══════════════════════════════════════ */
.gs-single {
  max-width: 760px;
  margin: 0 auto;
  padding: 60px 40px 100px;
}

.gs-single-back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 500;
  color: var(--gs-accent);
  margin-bottom: 32px;
  transition: gap 0.2s;
}

.gs-single-back:hover { gap: 4px; }

.gs-single-cat {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.8px;
  text-transform: uppercase;
  color: var(--gs-accent);
  display: block;
  margin-bottom: 12px;
}

.gs-single h1 {
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 700;
  letter-spacing: -1.5px;
  line-height: 1.15;
  color: var(--gs-text);
  margin-bottom: 20px;
}

.gs-single-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 13px;
  color: var(--gs-text-3);
  margin-bottom: 36px;
  padding-bottom: 36px;
  border-bottom: 1px solid var(--gs-border);
}

.gs-single-meta-dot {
  width: 3px; height: 3px;
  border-radius: 50%;
  background: var(--gs-text-3);
}

.gs-single-thumb {
  width: 100%;
  height: 360px;
  object-fit: cover;
  border-radius: var(--gs-radius);
  margin-bottom: 40px;
  border: 1px solid var(--gs-border);
}

/* Post content typography */
.gs-single-content {
  font-size: 16px;
  line-height: 1.8;
  color: var(--gs-text-2);
}

.gs-single-content h2 {
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -0.8px;
  color: var(--gs-text);
  margin: 40px 0 16px;
}

.gs-single-content h3 {
  font-size: 19px;
  font-weight: 600;
  letter-spacing: -0.4px;
  color: var(--gs-text);
  margin: 32px 0 12px;
}

.gs-single-content p { margin-bottom: 20px; }

.gs-single-content ul, .gs-single-content ol {
  padding-left: 24px;
  margin-bottom: 20px;
}

.gs-single-content li { margin-bottom: 8px; }

.gs-single-content a { color: var(--gs-accent); }

.gs-single-content blockquote {
  border-left: 3px solid var(--gs-accent);
  padding: 16px 20px;
  background: var(--gs-surface);
  border-radius: 0 8px 8px 0;
  margin: 28px 0;
  font-style: italic;
  color: var(--gs-text);
}

.gs-single-content img {
  width: 100%;
  border-radius: 10px;
  margin: 24px 0;
  border: 1px solid var(--gs-border);
}

.gs-single-content code {
  background: var(--gs-surface);
  border: 1px solid var(--gs-border);
  border-radius: 4px;
  padding: 2px 7px;
  font-size: 14px;
  color: var(--gs-text);
}

/* Author box */
.gs-author-box {
  display: flex;
  gap: 16px;
  align-items: center;
  padding: 24px;
  background: var(--gs-surface);
  border-radius: var(--gs-radius);
  border: 1px solid var(--gs-border);
  margin-top: 60px;
}

.gs-author-avatar {
  width: 52px; height: 52px;
  border-radius: 50%;
  background: var(--gs-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 18px;
  font-weight: 700;
  flex-shrink: 0;
}

.gs-author-name { font-size: 14px; font-weight: 600; color: var(--gs-text); margin-bottom: 4px; }
.gs-author-bio  { font-size: 13px; color: var(--gs-text-3); line-height: 1.6; }

/* Related posts */
.gs-related {
  margin-top: 60px;
  padding-top: 40px;
  border-top: 1px solid var(--gs-border);
}

.gs-related h3 {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.5px;
  color: var(--gs-text);
  margin-bottom: 24px;
}

.gs-related-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.gs-related-card {
  background: white;
  border: 1px solid var(--gs-border);
  border-radius: var(--gs-radius);
  padding: 20px;
  transition: border-color 0.2s, transform 0.2s;
  box-shadow: var(--gs-shadow);
}

.gs-related-card:hover {
  border-color: rgba(10,132,255,0.2);
  transform: translateY(-2px);
}

.gs-related-cat { font-size: 11px; font-weight: 700; letter-spacing: 0.6px; text-transform: uppercase; color: var(--gs-accent); margin-bottom: 6px; display: block; }
.gs-related-card h4 { font-size: 14px; font-weight: 600; letter-spacing: -0.2px; line-height: 1.5; color: var(--gs-text); }

/* ══════════════════════════════════════
   CATEGORY PAGE
══════════════════════════════════════ */
.gs-cat-hero {
  padding: 60px 40px 40px;
  max-width: 1100px;
  margin: 0 auto;
}

.gs-cat-hero h1 {
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 700;
  letter-spacing: -1.5px;
  color: var(--gs-text);
  margin-bottom: 10px;
}

.gs-cat-hero p {
  font-size: 15px;
  color: var(--gs-text-2);
  max-width: 500px;
}

.gs-cat-count {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 600;
  color: var(--gs-accent);
  background: var(--gs-accent-dim);
  border: 1px solid rgba(10,132,255,0.2);
  padding: 4px 12px;
  border-radius: 20px;
  margin-bottom: 16px;
}

/* ══════════════════════════════════════
   FOOTER (shared)
══════════════════════════════════════ */
.gs-footer {
  border-top: 1px solid var(--gs-border);
  padding: 48px 40px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--gs-surface);
  font-family: 'Inter', -apple-system, sans-serif;
}

.gs-footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  font-weight: 700;
  color: var(--gs-text);
  letter-spacing: -0.3px;
}

.gs-footer-logo-icon {
  width: 26px; height: 26px;
  background: var(--gs-accent);
  border-radius: 7px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: 1fr 1fr;
  gap: 2px;
  padding: 5px;
  box-shadow: 0 2px 8px rgba(10,132,255,0.3);
}

.gs-footer-logo-icon span { background: white; border-radius: 1px; display: block; }
.gs-footer-logo-icon span:first-child { grid-column: span 2; }

.gs-footer-links { display: flex; gap: 4px; list-style: none; margin: 0; padding: 0; }
.gs-footer-links a { font-size: 13px; color: var(--gs-text-3); padding: 6px 12px; border-radius: 8px; transition: color 0.2s, background 0.2s; }
.gs-footer-links a:hover { color: var(--gs-text); background: rgba(0,0,0,0.05); }
.gs-footer-copy { font-size: 12px; color: var(--gs-text-3); }

/* ══════════════════════════════════════
   RESPONSIVE
══════════════════════════════════════ */
@media (max-width: 900px) {
  .gs-header { width: calc(100% - 32px); top: 10px; }
  .gs-nav-links, .gs-nav-cta { display: none; }
  .gs-mobile-menu { display: flex; }
  .gs-posts-grid { grid-template-columns: 1fr; padding: 0 20px 60px; }
  .gs-no-posts { grid-column: span 1; }
  .gs-blog-hero, .gs-category-filter { padding-left: 20px; padding-right: 20px; }
  .gs-single { padding: 40px 20px 80px; }
  .gs-related-grid { grid-template-columns: 1fr; }
  .gs-footer { flex-direction: column; gap: 24px; text-align: center; padding: 40px 20px; }
  .gs-cat-hero { padding: 40px 20px 30px; }
}