/* ==============================================================================
   Regular Petcare - Design System & Master Stylesheet
   Modern Editorial Theme | High Performance | Zero Framework Bloat
   ============================================================================== */

@import url('https://fonts.googleapis.com/css2?family=EB+Garamond:ital,wght@0,400..800;1,400..800&family=Mulish:wght@300;400;500;600;700;800;900&family=Nunito+Sans:wght@300;400;600;700;800&display=swap');

:root {
  --ink: #191C1A;
  --ink-secondary: #4A4F4B;
  --muted: #737873;
  --paper: #F6F7F5;
  --card: #FFFFFF;
  --rule: #E3E4DF;
  --spruce: #1D6E63;
  --spruce-tint: #E8F1EF;
  --spruce-dark: #145048;
  --warm: #C2610F;
  --warm-tint: #FBF0E4;
  --warm-dark: #9E4D09;
  
  --font-serif: 'EB Garamond', Georgia, serif;
  --font-sans: 'Nunito Sans', 'Mulish', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  --container-max: 1140px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --shadow-subtle: 0 2px 8px rgba(25, 28, 26, 0.05);
  --shadow-card: 0 4px 16px rgba(25, 28, 26, 0.08);
  --transition: all 0.2s ease-in-out;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  background-color: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

a:hover {
  color: var(--spruce-dark);
}

a:focus-visible, button:focus-visible, input:focus-visible {
  outline: 2px solid var(--spruce);
  outline-offset: 3px;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-serif);
  color: var(--ink);
  line-height: 1.25;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.serif { font-family: var(--font-serif); }
.sans { font-family: var(--font-sans); }
.mono { font-family: var(--font-mono); }

.wrap {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

/* ==============================================================================
   Skip Link (Accessibility)
   ============================================================================== */
.skip-link {
  position: absolute;
  top: -40px;
  left: 10px;
  background: var(--ink);
  color: #fff;
  padding: 8px 16px;
  z-index: 1000;
  border-radius: var(--radius-sm);
  transition: top 0.2s ease;
}
.skip-link:focus {
  top: 10px;
}

/* ==============================================================================
   Site Header & Sticky Navigation
   ============================================================================== */
header.site-header {
  background: var(--card);
  border-bottom: 1px solid var(--rule);
  position: sticky;
  top: 0;
  z-index: 99;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 24px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--ink);
}

.brand-mark {
  width: 14px;
  height: 14px;
  border-radius: 3px;
  background: linear-gradient(135deg, var(--spruce), var(--warm));
  display: inline-block;
  flex-shrink: 0;
}

.brand-name {
  font-family: var(--font-serif);
  font-size: 1.45rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--ink);
  white-space: nowrap;
}

.brand-name span {
  color: var(--spruce);
}

nav.main-nav {
  display: flex;
  align-items: center;
  gap: 20px;
}

nav.main-nav a {
  font-size: 0.93rem;
  font-weight: 600;
  color: var(--ink-secondary);
  padding: 8px 4px;
  position: relative;
}

nav.main-nav a:hover, nav.main-nav a.active {
  color: var(--ink);
}

nav.main-nav a.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--warm);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

.search-form {
  position: relative;
}

.search-input {
  background: var(--paper);
  border: 1px solid var(--rule);
  border-radius: var(--radius-sm);
  padding: 7px 12px 7px 32px;
  font-size: 0.88rem;
  color: var(--ink);
  width: 180px;
  transition: var(--transition);
}

.search-input:focus {
  width: 230px;
  background: #fff;
  border-color: var(--spruce);
}

.search-icon {
  position: absolute;
  left: 10px;
  top: 50%;
  transform: translateY(-50%);
  width: 14px;
  height: 14px;
  fill: var(--muted);
  pointer-events: none;
}

/* Mobile Menu Button */
.hamburger-btn {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  color: var(--ink);
}

.hamburger-btn svg {
  width: 24px;
  height: 24px;
}

/* Mobile Drawer */
.mobile-drawer {
  display: none;
  background: var(--card);
  border-top: 1px solid var(--rule);
  padding: 20px 24px;
}

.mobile-drawer.open {
  display: block;
}

.mobile-drawer nav {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 20px;
}

.mobile-drawer nav a {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--ink);
}

/* ==============================================================================
   AdSense Containers (Reserved CLS Space)
   ============================================================================== */
.ad-slot {
  margin: 28px auto;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: #FAFAFA;
  border: 1px dashed var(--rule);
  border-radius: var(--radius-sm);
  position: relative;
  overflow: hidden;
}

.ad-label {
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 4px;
}

.ad-slot-leaderboard {
  min-height: 90px;
  width: 100%;
  max-width: 728px;
}

.ad-slot-inarticle {
  min-height: 250px;
  width: 100%;
  max-width: 650px;
  margin: 36px auto;
}

.ad-slot-sidebar {
  min-height: 250px;
  width: 100%;
  max-width: 300px;
}

/* ==============================================================================
   Hero Section
   ============================================================================== */
.hero-section {
  padding: 64px 0 32px;
}

.eyebrow {
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--warm);
  margin-bottom: 12px;
  display: inline-block;
}

.hero-title {
  font-size: 3.25rem;
  line-height: 1.08;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
  max-width: 22ch;
}

.hero-lede {
  font-size: 1.25rem;
  line-height: 1.6;
  color: var(--ink-secondary);
  max-width: 60ch;
  margin-bottom: 28px;
}

.byline-badge {
  display: flex;
  align-items: center;
  gap: 14px;
}

.author-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--spruce-tint);
  color: var(--spruce);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1rem;
  flex-shrink: 0;
  border: 1px solid rgba(29, 110, 99, 0.2);
}

.byline-text .author-name {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--ink);
}

.byline-text .author-credential {
  font-size: 0.82rem;
  color: var(--muted);
}

.hero-gradient-bar {
  margin-top: 48px;
  height: 4px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--spruce) 0%, #4E8E63 35%, #B8892A 70%, var(--warm) 100%);
}

.hero-gradient-labels {
  display: flex;
  justify-content: space-between;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted);
  margin-top: 8px;
}

/* ==============================================================================
   Editorial Hubs Grid
   ============================================================================== */
.section-pad {
  padding: 56px 0;
}

.kicker {
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 18px;
}

.section-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 24px;
  border-bottom: 2px solid var(--rule);
  padding-bottom: 12px;
}

.section-head h2 {
  font-size: 1.85rem;
}

.section-head a {
  font-size: 0.9rem;
  font-weight: 700;
}

.hubs-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.hub-card {
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: var(--radius-md);
  padding: 28px 24px 24px;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.hub-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-subtle);
  border-color: #D0D2CC;
}

.hub-num {
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--warm);
  margin-bottom: 10px;
}

.hub-card h3 {
  font-size: 1.35rem;
  margin-bottom: 10px;
}

.hub-card p {
  font-size: 0.92rem;
  color: var(--ink-secondary);
  line-height: 1.55;
  margin-bottom: 16px;
  flex-grow: 1;
}

.hub-footer {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--spruce);
  padding-top: 14px;
  border-top: 1px solid var(--rule);
}

/* ==============================================================================
   Latest Guides / Blog Stream
   ============================================================================== */
.stream-container {
  display: flex;
  flex-direction: column;
}

.post-row {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 28px;
  padding: 28px 0;
  border-top: 1px solid var(--rule);
  align-items: center;
}

.post-row:last-child {
  border-bottom: 1px solid var(--rule);
}

.post-thumb {
  width: 100%;
  height: 155px;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--spruce-tint);
  position: relative;
}

.post-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.post-row:hover .post-thumb img {
  transform: scale(1.03);
}

.post-badge {
  position: absolute;
  top: 10px;
  left: 10px;
  background: rgba(25, 28, 26, 0.85);
  color: #fff;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 4px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  backdrop-filter: blur(4px);
}

.post-info h3 {
  font-size: 1.45rem;
  margin-bottom: 8px;
  line-height: 1.3;
}

.post-info h3 a {
  color: var(--ink);
}

.post-info h3 a:hover {
  color: var(--spruce);
}

.post-info p {
  font-size: 0.95rem;
  color: var(--ink-secondary);
  line-height: 1.55;
  margin-bottom: 12px;
  max-width: 65ch;
}

.post-meta-line {
  font-size: 0.8rem;
  color: var(--muted);
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

/* ==============================================================================
   Trust / Verification Band
   ============================================================================== */
.trust-band {
  background: var(--card);
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  margin: 56px 0;
}

.trust-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
  padding: 48px 0;
}

.trust-item .t-kicker {
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--warm);
  margin-bottom: 8px;
}

.trust-item h4 {
  font-size: 1.15rem;
  margin-bottom: 8px;
}

.trust-item p {
  font-size: 0.9rem;
  color: var(--ink-secondary);
  line-height: 1.55;
}

/* ==============================================================================
   Newsletter / Checklist Capture
   ============================================================================== */
.newsletter-card {
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: var(--radius-lg);
  padding: 44px;
  margin: 40px 0;
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 48px;
  align-items: center;
}

.newsletter-card h2 {
  font-size: 2rem;
  margin-bottom: 10px;
}

.newsletter-card p {
  font-size: 0.95rem;
  color: var(--ink-secondary);
  line-height: 1.55;
}

.newsletter-form {
  display: flex;
  gap: 10px;
}

.newsletter-form input[type="email"] {
  flex: 1;
  background: var(--paper);
  border: 1px solid var(--rule);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  font-size: 0.95rem;
  color: var(--ink);
}

.newsletter-form button {
  background: var(--ink);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  padding: 12px 22px;
  font-size: 0.95rem;
  font-weight: 700;
  cursor: pointer;
  white-space: nowrap;
  transition: var(--transition);
}

.newsletter-form button:hover {
  background: var(--spruce);
}

.form-fineprint {
  font-size: 0.75rem;
  color: var(--muted);
  margin-top: 10px;
}

/* ==============================================================================
   Single Article Layout
   ============================================================================== */
.article-header {
  padding: 44px 0 24px;
  max-width: 820px;
  margin: 0 auto;
}

.breadcrumb-nav {
  font-size: 0.8rem;
  color: var(--muted);
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

.breadcrumb-nav a {
  color: var(--muted);
}
.breadcrumb-nav a:hover {
  color: var(--spruce);
}

.article-title {
  font-size: 2.85rem;
  line-height: 1.15;
  margin-bottom: 18px;
  letter-spacing: -0.025em;
}

.article-meta-box {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 0;
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  margin-bottom: 28px;
  flex-wrap: wrap;
  gap: 16px;
}

.article-author-info {
  display: flex;
  align-items: center;
  gap: 12px;
}

.article-lead-image {
  max-width: 860px;
  margin: 0 auto 36px;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-subtle);
}

.article-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 48px;
  max-width: var(--container-max);
  margin: 0 auto 60px;
}

.article-body {
  font-size: 1.08rem;
  line-height: 1.75;
  color: var(--ink);
  min-width: 0;
}

.article-body p {
  margin-bottom: 1.5em;
}

.article-body h2 {
  font-size: 1.85rem;
  margin: 1.8em 0 0.8em;
  padding-top: 0.5em;
  border-top: 1px solid var(--rule);
}

.article-body h3 {
  font-size: 1.4rem;
  margin: 1.4em 0 0.6em;
}

.article-body ul, .article-body ol {
  margin: 1em 0 1.5em 1.5em;
}

.article-body li {
  margin-bottom: 0.5em;
}

.article-body img {
  border-radius: var(--radius-sm);
  margin: 1.8em auto;
}

.article-body blockquote {
  border-left: 3px solid var(--spruce);
  padding: 12px 20px;
  background: var(--spruce-tint);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 1.8em 0;
  font-style: italic;
}

/* Table of Contents */
.toc-box {
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: var(--radius-md);
  padding: 24px;
  margin-bottom: 32px;
}

.toc-title {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.toc-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.toc-list li {
  margin-bottom: 8px;
  font-size: 0.92rem;
}

.toc-list li a {
  color: var(--ink-secondary);
  display: block;
}

.toc-list li a:hover {
  color: var(--spruce);
  text-decoration: underline;
}

/* Sidebar */
.article-sidebar {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.sidebar-card {
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: var(--radius-md);
  padding: 24px;
}

.sidebar-title {
  font-size: 1.15rem;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--rule);
}

/* Author Box at Bottom of Article */
.author-box {
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: var(--radius-md);
  padding: 28px;
  margin: 48px 0;
  display: flex;
  gap: 20px;
  align-items: flex-start;
}

.author-box-avatar {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: var(--spruce-tint);
  color: var(--spruce);
  font-size: 1.3rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.author-box-content h4 {
  font-size: 1.25rem;
  margin-bottom: 4px;
}

.author-box-content .role {
  font-size: 0.85rem;
  color: var(--warm);
  font-weight: 700;
  margin-bottom: 10px;
}

.author-box-content p {
  font-size: 0.92rem;
  color: var(--ink-secondary);
  line-height: 1.6;
}

/* Related Posts */
.related-posts-section {
  padding: 48px 0 24px;
  border-top: 1px solid var(--rule);
}

.posts-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 20px;
}

.grid-card {
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: var(--radius-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
}

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

.grid-card-thumb {
  height: 180px;
  background: var(--spruce-tint);
  overflow: hidden;
}

.grid-card-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.grid-card-body {
  padding: 20px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.grid-card-body .cat-badge {
  font-size: 0.7rem;
  font-weight: 800;
  color: var(--warm);
  text-transform: uppercase;
  margin-bottom: 8px;
}

.grid-card-body h3 {
  font-size: 1.2rem;
  line-height: 1.35;
  margin-bottom: 8px;
}

.grid-card-body p {
  font-size: 0.88rem;
  color: var(--ink-secondary);
  line-height: 1.5;
  margin-bottom: 12px;
  flex-grow: 1;
}

.grid-card-meta {
  font-size: 0.78rem;
  color: var(--muted);
  border-top: 1px solid var(--rule);
  padding-top: 10px;
}

/* ==============================================================================
   Footer
   ============================================================================== */
footer.site-footer {
  background: var(--card);
  border-top: 1px solid var(--rule);
  padding: 48px 0 32px;
  margin-top: 64px;
}

.footer-top {
  display: grid;
  grid-template-columns: 1.5fr repeat(3, 1fr);
  gap: 40px;
  margin-bottom: 40px;
}

.footer-brand p {
  font-size: 0.9rem;
  color: var(--ink-secondary);
  margin-top: 12px;
  max-width: 35ch;
}

.footer-col h5 {
  font-size: 0.95rem;
  font-family: var(--font-sans);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 14px;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 10px;
}

.footer-links a {
  color: var(--ink-secondary);
  font-size: 0.88rem;
}

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

.footer-bottom {
  border-top: 1px solid var(--rule);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.82rem;
  color: var(--muted);
  flex-wrap: wrap;
  gap: 16px;
}

/* ==============================================================================
   Responsive Queries
   ============================================================================== */
@media (max-width: 900px) {
  nav.main-nav, .search-form {
    display: none;
  }
  .hamburger-btn {
    display: block;
  }
  .hero-title {
    font-size: 2.4rem;
  }
  .hubs-grid, .trust-grid, .posts-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .newsletter-card {
    grid-template-columns: 1fr;
    gap: 24px;
    padding: 28px;
  }
  .article-layout {
    grid-template-columns: 1fr;
  }
  .article-title {
    font-size: 2.1rem;
  }
  .footer-top {
    grid-template-columns: 1fr;
    gap: 32px;
  }
}

@media (max-width: 640px) {
  .wrap {
    padding-left: 16px;
    padding-right: 16px;
  }
  .post-row {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .post-thumb {
    height: 190px;
  }
  .newsletter-form {
    flex-direction: column;
  }
  .author-box {
    flex-direction: column;
  }
}