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

/* CSS Variables */
:root {
  /* Primary - Nature Green */
  --color-primary: #2d5a27;
  --color-primary-dark: #1a3a17;
  --color-primary-light: #4a7c43;

  /* Bird accent - Teal spectrum */
  --color-bird: #00695c;
  --color-bird-light: #80cbc4;
  --color-bird-bg: #e0f7fa;

  /* Mammal accent - Earth tones */
  --color-mammal: #8b4513;
  --color-mammal-light: #deb887;
  --color-mammal-bg: #fef9e7;

  /* Fish accent - Ocean blue */
  --color-fish: #1565c0;
  --color-fish-light: #64b5f6;
  --color-fish-bg: #e3f2fd;

  /* Neutral */
  --color-bg: linear-gradient(135deg, #f0f5e8 0%, #e8f0e0 100%);
  --color-text: #333;
  --color-text-muted: #666;
  --color-text-light: #888;
  --color-card-bg: white;
  --color-card-shadow: rgba(0, 0, 0, 0.1);
  --color-border: #e0e0e0;

  /* Conservation status colors */
  --color-least-concern: #4caf50;
  --color-near-threatened: #ffeb3b;
  --color-vulnerable: #ff9800;
  --color-endangered: #f44336;
  --color-critically-endangered: #9c27b0;

  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;

  /* Typography */
  --font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.5rem;
  --font-size-2xl: 2rem;
  --font-size-3xl: 2.5rem;

  /* Borders */
  --border-radius: 12px;
  --border-radius-lg: 16px;
}

/* Base Styles */
html {
  font-size: 16px;
  line-height: 1.6;
}

body {
  font-family: var(--font-family);
  background: var(--color-bg);
  color: var(--color-text);
  min-height: 100vh;
}

a {
  color: inherit;
  text-decoration: none;
}

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

/* Header */
.header {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: white;
  padding: var(--spacing-xl) var(--spacing-lg);
  text-align: center;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.header h1 {
  font-size: var(--font-size-3xl);
  margin-bottom: var(--spacing-xs);
  font-weight: 700;
}

.header .subtitle {
  font-size: var(--font-size-lg);
  opacity: 0.9;
}

.header .breadcrumb {
  margin-bottom: var(--spacing-md);
  font-size: var(--font-size-sm);
  opacity: 0.9;
}

.header .breadcrumb a {
  text-decoration: underline;
  transition: opacity 0.2s;
}

.header .breadcrumb a:hover {
  opacity: 0.8;
}

.header .breadcrumb .separator {
  margin: 0 var(--spacing-xs);
}

/* Main Container */
.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: var(--spacing-lg);
}

/* Intro Section */
.intro {
  background: rgba(255, 255, 255, 0.9);
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--border-radius);
  margin-bottom: var(--spacing-lg);
  text-align: center;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
  box-shadow: 0 2px 10px var(--color-card-shadow);
}

/* Filter Bar */
.filter-bar {
  background: var(--color-card-bg);
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--border-radius);
  margin-bottom: var(--spacing-lg);
  box-shadow: 0 2px 10px var(--color-card-shadow);
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  align-items: flex-end;
}

.filter-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.filter-group label {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.button-group {
  display: flex;
  gap: 0;
  border-radius: var(--border-radius);
  overflow: hidden;
  border: 2px solid var(--color-border);
}

.button-group button {
  padding: var(--spacing-xs) var(--spacing-sm);
  border: none;
  background: white;
  cursor: pointer;
  font-size: var(--font-size-sm);
  font-weight: 500;
  transition: all 0.2s;
  min-width: 70px;
}

.button-group button:not(:last-child) {
  border-right: 1px solid var(--color-border);
}

.button-group button:hover {
  background: #f5f5f5;
}

.button-group button.active {
  background: var(--color-primary);
  color: white;
}

.button-group button.active.bird {
  background: var(--color-bird);
}

.button-group button.active.mammal {
  background: var(--color-mammal);
}

.button-group button.active.fish {
  background: var(--color-fish);
}

.filter-group select {
  padding: var(--spacing-xs) var(--spacing-sm);
  border: 2px solid var(--color-border);
  border-radius: var(--border-radius);
  font-size: var(--font-size-sm);
  background: white;
  cursor: pointer;
  min-width: 140px;
}

.filter-group select:focus {
  outline: none;
  border-color: var(--color-primary);
}

.filter-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-left: auto;
}

.clear-btn {
  padding: var(--spacing-xs) var(--spacing-sm);
  background: #f5f5f5;
  border: 2px solid var(--color-border);
  border-radius: var(--border-radius);
  cursor: pointer;
  font-size: var(--font-size-sm);
  transition: all 0.2s;
}

.clear-btn:hover {
  background: #e0e0e0;
}

.result-count {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  font-weight: 500;
}

/* Animal Grid */
.animal-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--spacing-lg);
}

/* Animal Card Link */
.animal-card-link {
  text-decoration: none;
  color: inherit;
  display: block;
}

/* Animal Card */
.animal-card {
  background: var(--color-card-bg);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  box-shadow: 0 4px 15px var(--color-card-shadow);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.animal-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.15);
}

.animal-card .animal-image {
  position: relative;
  height: 200px;
  overflow: hidden;
}

.animal-card .animal-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.animal-card:hover .animal-image img {
  transform: scale(1.05);
}

.type-badge {
  position: absolute;
  top: var(--spacing-sm);
  right: var(--spacing-sm);
  padding: 4px 12px;
  border-radius: 20px;
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: white;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.type-badge.bird {
  background: var(--color-bird);
}

.type-badge.mammal {
  background: var(--color-mammal);
}

.type-badge.fish {
  background: var(--color-fish);
}

.animal-info {
  padding: var(--spacing-md);
}

.animal-info h2 {
  font-size: var(--font-size-xl);
  color: var(--color-primary-dark);
  margin-bottom: var(--spacing-xs);
}

.animal-info .scientific-name {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-sm);
}

.animal-info .description {
  font-size: var(--font-size-sm);
  color: var(--color-text);
  line-height: 1.5;
  margin-bottom: var(--spacing-sm);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-footer {
  display: flex;
  justify-content: flex-start;
}

.conservation-badge {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 12px;
  font-size: 0.75rem;
  font-weight: 600;
  color: white;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

/* Empty State */
.empty-state {
  text-align: center;
  padding: var(--spacing-xl);
  color: var(--color-text-muted);
}

.empty-state h3 {
  font-size: var(--font-size-xl);
  margin-bottom: var(--spacing-sm);
}

/* Detail Page */
.detail-page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.detail-content {
  flex: 1;
}

.detail-hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

.detail-image {
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  box-shadow: 0 8px 30px var(--color-card-shadow);
}

.detail-image img {
  width: 100%;
  height: 400px;
  object-fit: cover;
}

.detail-info {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.detail-info h1 {
  font-size: var(--font-size-3xl);
  color: var(--color-primary-dark);
  margin-bottom: var(--spacing-xs);
}

.detail-info .scientific-name {
  font-size: var(--font-size-lg);
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-md);
}

.detail-badges {
  display: flex;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
}

.detail-info .description {
  font-size: var(--font-size-lg);
  line-height: 1.7;
  color: var(--color-text);
}

/* Quick Facts Grid */
.quick-facts {
  background: var(--color-card-bg);
  padding: var(--spacing-lg);
  border-radius: var(--border-radius-lg);
  margin-bottom: var(--spacing-xl);
  box-shadow: 0 4px 15px var(--color-card-shadow);
}

.quick-facts h2 {
  font-size: var(--font-size-xl);
  color: var(--color-primary-dark);
  margin-bottom: var(--spacing-md);
  text-align: center;
}

.facts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--spacing-md);
}

.fact-item {
  background: #f8f9fa;
  padding: var(--spacing-md);
  border-radius: var(--border-radius);
  text-align: center;
}

.fact-item .label {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: var(--spacing-xs);
}

.fact-item .value {
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--color-text);
}

/* Fun Fact Callout */
.fun-fact {
  background: linear-gradient(135deg, var(--color-primary-light) 0%, var(--color-primary) 100%);
  color: white;
  padding: var(--spacing-lg);
  border-radius: var(--border-radius-lg);
  margin-bottom: var(--spacing-xl);
  text-align: center;
}

.fun-fact h3 {
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-sm);
  opacity: 0.9;
}

.fun-fact p {
  font-size: var(--font-size-xl);
  font-weight: 500;
  line-height: 1.5;
}

/* Related Animals */
.related-section {
  margin-bottom: var(--spacing-xl);
}

.related-section h2 {
  font-size: var(--font-size-xl);
  color: var(--color-primary-dark);
  margin-bottom: var(--spacing-md);
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--spacing-md);
}

/* Footer */
.footer {
  background: linear-gradient(135deg, var(--color-primary-dark) 0%, #0d1f0a 100%);
  color: white;
  padding: var(--spacing-lg);
  text-align: center;
}

.footer p {
  margin-bottom: var(--spacing-xs);
}

.footer .attribution a {
  color: var(--color-bird-light);
  text-decoration: underline;
}

.footer .attribution a:hover {
  opacity: 0.8;
}

/* 404 Page */
.not-found {
  text-align: center;
  padding: var(--spacing-xl);
}

.not-found h1 {
  font-size: 4rem;
  color: var(--color-primary);
  margin-bottom: var(--spacing-sm);
}

.not-found p {
  font-size: var(--font-size-lg);
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-lg);
}

.not-found a {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-lg);
  background: var(--color-primary);
  color: white;
  border-radius: var(--border-radius);
  font-weight: 600;
  transition: background 0.2s;
}

.not-found a:hover {
  background: var(--color-primary-dark);
}

/* Responsive Design */
@media (max-width: 900px) {
  .detail-hero {
    grid-template-columns: 1fr;
  }

  .detail-image img {
    height: 300px;
  }

  .detail-info h1 {
    font-size: var(--font-size-2xl);
  }
}

@media (max-width: 768px) {
  .header h1 {
    font-size: var(--font-size-2xl);
  }

  .header .subtitle {
    font-size: var(--font-size-base);
  }

  .filter-bar {
    flex-direction: column;
    align-items: stretch;
  }

  .filter-group {
    width: 100%;
  }

  .button-group {
    width: 100%;
  }

  .button-group button {
    flex: 1;
  }

  .filter-group select {
    width: 100%;
  }

  .filter-actions {
    margin-left: 0;
    justify-content: space-between;
  }

  .animal-grid {
    grid-template-columns: 1fr;
  }

  .facts-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 480px) {
  .container {
    padding: var(--spacing-sm);
  }

  .facts-grid {
    grid-template-columns: 1fr;
  }
}