/* =============================================
   CatHealth Hub - Main Stylesheet
   A warm, friendly cat health & wellness website
   ============================================= */

/* ---------------------------------------------
   CSS Variables / Design Tokens
   --------------------------------------------- */
:root {
  /* Primary Colors */
  --color-primary: #E67E22;
  --color-secondary: #F39C12;
  --color-accent: #D35400;
  
  /* Background Colors */
  --bg-warm: #FEF9F3;
  --bg-white: #FFFFFF;
  --bg-alt: #FDF2E9;
  
  /* Text Colors */
  --text-primary: #2C3E50;
  --text-secondary: #7F8C8D;
  --text-light: #FFFFFF;
  
  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(230, 126, 34, 0.1);
  --shadow-md: 0 4px 16px rgba(230, 126, 34, 0.15);
  --shadow-lg: 0 8px 32px rgba(230, 126, 34, 0.2);
  --shadow-warm: 0 4px 20px rgba(211, 84, 0, 0.12);
  
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  
  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  
  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.4s ease;
  
  /* Typography */
  --font-family: 'Segoe UI', Roboto, Arial, Helvetica, sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-warm);
  min-height: 100vh;
}

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

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

ul, ol {
  list-style: none;
}

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

/* ---------------------------------------------
   Typography
   --------------------------------------------- */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.3;
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
}

h1 {
  font-size: 2.5rem;
}

h2 {
  font-size: 2rem;
}

h3 {
  font-size: 1.5rem;
}

h4 {
  font-size: 1.25rem;
}

p {
  margin-bottom: var(--spacing-md);
  color: var(--text-secondary);
}

p:last-child {
  margin-bottom: 0;
}

/* ---------------------------------------------
   Utility Classes
   --------------------------------------------- */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.text-center {
  text-align: center;
}

.text-primary {
  color: var(--color-primary);
}

.mt-2 {
  margin-top: var(--spacing-md);
}

.mt-4 {
  margin-top: var(--spacing-xl);
}

/* ---------------------------------------------
   Header & Navigation
   --------------------------------------------- */
.header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: var(--bg-white);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-normal);
}

.header:hover {
  box-shadow: var(--shadow-md);
}

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-md) 0;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.logo::before {
  content: '🐱';
  font-size: 1.75rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--spacing-xl);
}

.nav-links li a {
  font-weight: 500;
  color: var(--text-primary);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.nav-links li a:hover {
  color: var(--color-primary);
  background-color: rgba(230, 126, 34, 0.08);
}

/* Hamburger Menu */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  cursor: pointer;
  padding: var(--spacing-sm);
  background: none;
  border: none;
  z-index: 1001;
}

.hamburger span {
  display: block;
  width: 25px;
  height: 3px;
  background-color: var(--color-primary);
  border-radius: 2px;
  transition: all var(--transition-normal);
}

.hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.active span:nth-child(2) {
  opacity: 0;
}

.hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -6px);
}

/* ---------------------------------------------
   Hero Section
   --------------------------------------------- */
.hero {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 50%, var(--color-accent) 100%);
  color: var(--text-light);
  padding: var(--spacing-2xl) 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  opacity: 0.5;
}

.hero .container {
  position: relative;
  z-index: 1;
}

.hero h1 {
  color: var(--text-light);
  font-size: 3rem;
  margin-bottom: var(--spacing-lg);
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.hero p {
  color: rgba(255, 255, 255, 0.9);
  font-size: 1.25rem;
  max-width: 600px;
  margin: 0 auto var(--spacing-xl);
}

/* ---------------------------------------------
   Buttons
   --------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-md) var(--spacing-xl);
  font-family: var(--font-family);
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition-normal);
  text-align: center;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  background-color: var(--color-primary);
  color: var(--text-light);
  border-color: var(--color-primary);
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
  box-shadow: var(--shadow-md);
  color: var(--text-light);
}

.btn-outline {
  background-color: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.btn-outline:hover {
  background-color: var(--color-primary);
  color: var(--text-light);
}

/* ---------------------------------------------
   Sections
   --------------------------------------------- */
.section {
  padding: var(--spacing-2xl) 0;
}

.section-alt {
  background-color: var(--bg-alt);
}

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-2xl);
}

.section-header h2 {
  position: relative;
  display: inline-block;
  margin-bottom: var(--spacing-md);
}

.section-header h2::after {
  content: '';
  position: absolute;
  bottom: -8px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
  border-radius: 2px;
}

.section-header p {
  max-width: 600px;
  margin: var(--spacing-lg) auto 0;
  color: var(--text-secondary);
}

/* ---------------------------------------------
   Card Grid & Cards
   --------------------------------------------- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-xl);
}

.card {
  background-color: var(--bg-white);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-warm);
  transition: all var(--transition-normal);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

/* Article Cards */
.article-card {
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.article-card-content {
  padding: var(--spacing-lg);
  flex: 1;
  display: flex;
  flex-direction: column;
}

.article-card h3 {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-sm);
  transition: color var(--transition-fast);
}

.article-card:hover h3 {
  color: var(--color-primary);
}

.article-card p {
  flex: 1;
  font-size: 0.95rem;
}

.read-more {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  margin-top: var(--spacing-md);
  color: var(--color-primary);
  font-weight: 600;
  transition: all var(--transition-fast);
}

.read-more:hover {
  gap: var(--spacing-sm);
  color: var(--color-accent);
}

.read-more::after {
  content: '→';
  transition: transform var(--transition-fast);
}

.article-card:hover .read-more::after {
  transform: translateX(4px);
}

/* Tool Cards */
.tool-card {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.tool-icon {
  width: 80px;
  height: 80px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
  margin-bottom: var(--spacing-lg);
  box-shadow: var(--shadow-sm);
}

.tool-name {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
}

.tool-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* ---------------------------------------------
   Page Content & Articles
   --------------------------------------------- */
.page-content {
  max-width: 800px;
  margin: 0 auto;
  padding: var(--spacing-2xl) var(--spacing-lg);
}

.article-body {
  background-color: var(--bg-white);
  border-radius: var(--radius-lg);
  padding: var(--spacing-2xl);
  box-shadow: var(--shadow-warm);
}

.article-body h2 {
  margin-top: var(--spacing-xl);
  color: var(--color-primary);
}

.article-body h3 {
  margin-top: var(--spacing-lg);
  color: var(--color-accent);
}

.article-body p {
  margin-bottom: var(--spacing-lg);
  line-height: 1.8;
}

.article-body ul, .article-body ol {
  margin-bottom: var(--spacing-lg);
  padding-left: var(--spacing-xl);
}

.article-body li {
  margin-bottom: var(--spacing-sm);
  position: relative;
  padding-left: var(--spacing-md);
  color: var(--text-secondary);
}

.article-body li::before {
  content: '🐾';
  position: absolute;
  left: -8px;
  font-size: 0.75rem;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-lg);
  padding: var(--spacing-lg) 0;
  border-bottom: 1px solid rgba(230, 126, 34, 0.1);
  margin-bottom: var(--spacing-xl);
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.article-meta span {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

/* ---------------------------------------------
   Article Navigation (Sticky)
   --------------------------------------------- */
.article-nav {
  position: sticky;
  top: 70px;
  z-index: 100;
  background-color: var(--bg-white);
  border-bottom: 1px solid rgba(230, 126, 34, 0.1);
  box-shadow: var(--shadow-sm);
}

.article-nav-inner {
  display: flex;
  justify-content: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md) 0;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.article-nav a {
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--radius-md);
  font-weight: 500;
  white-space: nowrap;
  transition: all var(--transition-fast);
  color: var(--text-secondary);
  background-color: var(--bg-alt);
}

.article-nav a:hover, .article-nav a.active {
  background-color: var(--color-primary);
  color: var(--text-light);
}

/* ---------------------------------------------
   Tool Panel & Forms
   --------------------------------------------- */
.tool-panel {
  background-color: var(--bg-white);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-warm);
  margin-bottom: var(--spacing-xl);
}

.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-group label {
  display: block;
  margin-bottom: var(--spacing-sm);
  font-weight: 500;
  color: var(--text-primary);
}

input[type="text"],
input[type="email"],
input[type="number"],
input[type="date"],
select,
textarea {
  width: 100%;
  padding: var(--spacing-md);
  font-family: var(--font-family);
  font-size: 1rem;
  border: 2px solid rgba(230, 126, 34, 0.2);
  border-radius: var(--radius-md);
  background-color: var(--bg-white);
  transition: all var(--transition-fast);
}

input:focus,
select:focus,
textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(230, 126, 34, 0.15);
}

textarea {
  min-height: 120px;
  resize: vertical;
}

input::placeholder,
textarea::placeholder {
  color: var(--text-secondary);
  opacity: 0.7;
}

/* ---------------------------------------------
   FAQ Accordion
   --------------------------------------------- */
.faq-item {
  background-color: var(--bg-white);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-md);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.faq-question {
  width: 100%;
  padding: var(--spacing-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: none;
  border: none;
  font-family: var(--font-family);
  font-size: 1.1rem;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
  color: var(--text-primary);
  transition: all var(--transition-fast);
}

.faq-question:hover {
  color: var(--color-primary);
}

.faq-question::after {
  content: '+';
  font-size: 1.5rem;
  font-weight: 300;
  color: var(--color-primary);
  transition: transform var(--transition-fast);
}

.faq-item.active .faq-question::after {
  transform: rotate(45deg);
}

.faq-item.active .faq-question {
  color: var(--color-primary);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-normal), padding var(--transition-normal);
}

.faq-item.active .faq-answer {
  max-height: 500px;
}

.faq-answer-inner {
  padding: 0 var(--spacing-lg) var(--spacing-lg);
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ---------------------------------------------
   Footer
   --------------------------------------------- */
.footer-links {
  display: flex;
  justify-content: center;
  gap: var(--spacing-xl);
  flex-wrap: wrap;
  padding: var(--spacing-xl) 0;
  border-top: 1px solid rgba(230, 126, 34, 0.1);
}

.footer-links a {
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

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

footer {
  background-color: var(--bg-alt);
  text-align: center;
  padding: var(--spacing-xl) 0;
}

footer p {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

/* ---------------------------------------------
   Animations
   --------------------------------------------- */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInScale {
  from {
    opacity: 0;
    transform: scale(0.95);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

.card {
  animation: fadeIn var(--transition-slow) ease-out forwards;
}

.article-card, .tool-card {
  opacity: 0;
  animation: fadeInUp 0.5s ease-out forwards;
}

/* Staggered animation for card grids */
.card-grid .card:nth-child(1) { animation-delay: 0.1s; }
.card-grid .card:nth-child(2) { animation-delay: 0.2s; }
.card-grid .card:nth-child(3) { animation-delay: 0.3s; }
.card-grid .card:nth-child(4) { animation-delay: 0.4s; }
.card-grid .card:nth-child(5) { animation-delay: 0.5s; }
.card-grid .card:nth-child(6) { animation-delay: 0.6s; }

/* ---------------------------------------------
   Responsive Design (Mobile)
   --------------------------------------------- */
@media (max-width: 768px) {
  /* Typography adjustments */
  h1 {
    font-size: 2rem;
  }
  
  h2 {
    font-size: 1.75rem;
  }
  
  h3 {
    font-size: 1.25rem;
  }
  
  .hero h1 {
    font-size: 2.25rem;
  }
  
  .hero p {
    font-size: 1.1rem;
  }
  
  /* Navigation */
  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 80%;
    max-width: 320px;
    height: 100vh;
    flex-direction: column;
    justify-content: flex-start;
    padding-top: 80px;
    background-color: var(--bg-white);
    box-shadow: var(--shadow-lg);
    transition: right var(--transition-normal);
    gap: 0;
  }
  
  .nav-links.active {
    right: 0;
  }
  
  .nav-links li {
    width: 100%;
    border-bottom: 1px solid rgba(230, 126, 34, 0.1);
  }
  
  .nav-links li a {
    display: block;
    padding: var(--spacing-lg);
  }
  
  .hamburger {
    display: flex;
  }
  
  /* Card Grid - Tablet */
  .card-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
  }
  
  /* Sections */
  .section {
    padding: var(--spacing-xl) 0;
  }
  
  .section-header {
    margin-bottom: var(--spacing-xl);
  }
  
  /* Article Navigation */
  .article-nav {
    top: 60px;
  }
  
  .article-nav-inner {
    justify-content: flex-start;
    padding: var(--spacing-sm) var(--spacing-md);
  }
  
  /* Page Content */
  .page-content {
    padding: var(--spacing-xl) var(--spacing-md);
  }
  
  .article-body {
    padding: var(--spacing-lg);
  }
  
  /* Tool Panel */
  .tool-panel {
    padding: var(--spacing-lg);
  }
  
  /* Footer */
  .footer-links {
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
  }
}

@media (max-width: 480px) {
  /* Card Grid - Mobile Single Column */
  .card-grid {
    grid-template-columns: 1fr;
  }
  
  /* Typography */
  h1 {
    font-size: 1.75rem;
  }
  
  .hero h1 {
    font-size: 1.875rem;
  }
  
  /* Buttons */
  .btn {
    width: 100%;
    padding: var(--spacing-md);
  }
  
  /* Form groups */
  .form-group {
    margin-bottom: var(--spacing-md);
  }
  
  /* FAQ */
  .faq-question {
    padding: var(--spacing-md);
    font-size: 1rem;
  }
  
  .faq-answer-inner {
    padding: 0 var(--spacing-md) var(--spacing-md);
  }
}

/* ---------------------------------------------
   Additional Utility Classes
   --------------------------------------------- */
.hidden {
  display: none !important;
}

.visible {
  display: block !important;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Smooth scroll offset for sticky header */
html {
  scroll-padding-top: 80px;
}

/* Overlay for mobile menu */
.nav-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: 998;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}

.nav-overlay.active {
  opacity: 1;
  visibility: visible;
}

/* Tool link overlay - makes entire card clickable */
.tool-link-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

/* Make entire tool card clickable */
article.tool-card a {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2;
    display: block;
}

/* Ensure card content is above the link overlay */
article.tool-card > *:not(a) {
    position: relative;
    z-index: 3;
}

/* Ensure CTA button inside card is clickable */
article.tool-card .cta-button,
article.tool-card .read-more {
    position: relative;
    z-index: 4;
}