/* CSS Variables for Themes */
:root {
  --bg-color: #f4f7fa;
  --text-color: #333;
  --card-bg: #fff;
  --nav-bg: #007bff;
  --nav-text: #fff;
  --button-bg: #007bff;
  --button-hover: #0056b3;
  --input-bg: #fff;
  --input-border: #ccc;
  --shadow: rgba(0, 0, 0, 0.1);
  --gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --transition: all 0.3s ease;
}

[data-theme="dark"] {
  --bg-color: #0a0a0a;
  --text-color: #ffffff;
  --card-bg: #1a1a1a;
  --nav-bg: #2a2a2a;
  --nav-text: #ffffff;
  --button-bg: #444;
  --button-hover: #666;
  --input-bg: #222;
  --input-border: #444;
  --shadow: rgba(255, 255, 255, 0.15);
  --gradient: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
}

/* Ensure all text is white in dark mode */
[data-theme="dark"] * {
  color: var(--text-color) !important;
}

/* Global Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: var(--bg-color);
  color: var(--text-color);
  line-height: 1.6;
  transition: var(--transition);
  padding-bottom: 80px; /* Add padding to account for fixed footer */
}

h1, h2, h3, h4 {
  margin-bottom: 1rem;
  color: var(--text-color);
}

p {
  margin-bottom: 1rem;
}

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

a:hover {
  text-decoration: underline;
}

/* Navigation */
nav {
  background: var(--gradient);
  padding: 1rem 0;
  box-shadow: 0 2px 10px var(--shadow);
}

nav ul {
  list-style: none;
  display: flex;
  justify-content: center;
  gap: 2rem;
}

nav a {
  color: var(--nav-text);
  font-weight: bold;
  padding: 0.5rem 1rem;
  border-radius: 5px;
  transition: var(--transition);
}

nav a:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: translateY(-2px);
}

/* Theme Toggle */
.theme-toggle {
  position: fixed;
  top: 20px;
  right: 20px;
  background: var(--button-bg);
  color: var(--nav-text);
  border: none;
  padding: 0.5rem 1rem;
  border-radius: 50px;
  cursor: pointer;
  font-size: 1rem;
  transition: var(--transition);
  box-shadow: 0 4px 15px var(--shadow);
  z-index: 1000;
}

.theme-toggle:hover {
  background: var(--button-hover);
  transform: scale(1.05);
}

/* Home Page */
.home-page {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem;
}

.home-page header {
  text-align: center;
  margin-bottom: 3rem;
  animation: fadeInUp 1s ease-out;
}

.home-page h1 {
  font-size: 3rem;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 1rem;
}

/* Make the title white in dark mode */
[data-theme="dark"] .home-page h1 {
  -webkit-text-fill-color: var(--text-color) !important;
  background: none !important;
  color: var(--text-color) !important;
}

.search-section {
  margin: 2rem 0;
}

#search-input {
  width: 100%;
  max-width: 400px;
  padding: 0.75rem;
  border: 2px solid var(--input-border);
  border-radius: 25px;
  background: var(--input-bg);
  color: var(--text-color);
  font-size: 1rem;
  transition: var(--transition);
}

#search-input:focus {
  outline: none;
  border-color: var(--nav-bg);
  box-shadow: 0 0 10px rgba(0, 123, 255, 0.3);
}

/* Diseases Grid */
.diseases-grid {
  margin-bottom: 3rem;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
}

.disease-item {
  background: var(--card-bg);
  padding: 1.5rem;
  border-radius: 10px;
  box-shadow: 0 4px 15px var(--shadow);
  cursor: pointer;
  transition: var(--transition);
  animation: fadeInUp 0.8s ease-out;
}

.disease-item:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 25px var(--shadow);
}

.disease-item.selected {
  border: 3px solid var(--nav-bg);
  background: var(--gradient);
  color: var(--nav-text);
}

.disease-item h3 {
  margin-bottom: 0.5rem;
  font-size: 1.25rem;
}

/* Disease Details */
.disease-details {
  display: flex;
  gap: 2rem;
  flex-wrap: wrap;
}

.card {
  background: var(--card-bg);
  padding: 1.5rem;
  border-radius: 10px;
  box-shadow: 0 4px 15px var(--shadow);
  flex: 1;
  min-width: 300px;
  animation: fadeInUp 1s ease-out;
}

.card h3, .card h4 {
  margin-bottom: 1rem;
  color: var(--nav-bg);
}

.card ul {
  list-style: none;
  padding-left: 1rem;
}

.card li {
  margin-bottom: 0.5rem;
  position: relative;
}

.card li::before {
  content: "✓";
  color: var(--nav-bg);
  font-weight: bold;
  position: absolute;
  left: -1.5rem;
}

/* Recipes Page */
.recipes-page {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem;
}

.recipes-page header {
  text-align: center;
  margin-bottom: 3rem;
  animation: fadeInUp 1s ease-out;
}

.filters {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}

#recipe-search, #disease-filter {
  padding: 0.75rem;
  border: 2px solid var(--input-border);
  border-radius: 25px;
  background: var(--input-bg);
  color: var(--text-color);
  font-size: 1rem;
  transition: var(--transition);
}

#recipe-search {
  flex: 1;
  min-width: 250px;
}

#disease-filter {
  min-width: 150px;
}

#recipe-search:focus, #disease-filter:focus {
  outline: none;
  border-color: var(--nav-bg);
  box-shadow: 0 0 10px rgba(0, 123, 255, 0.3);
}

/* Recipes Grid */
.recipes-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 2rem;
}

.recipe-card {
  background: var(--card-bg);
  padding: 1.5rem;
  border-radius: 10px;
  box-shadow: 0 4px 15px var(--shadow);
  transition: var(--transition);
  animation: fadeInUp 0.8s ease-out;
}

.recipe-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 25px var(--shadow);
}

.recipe-card h3 {
  margin-bottom: 1rem;
  color: var(--nav-bg);
}

.recipe-preview {
  margin-bottom: 1rem;
}

.recipe-details {
  border-top: 1px solid var(--input-border);
  padding-top: 1rem;
}

.recipe-details h4 {
  margin-bottom: 0.5rem;
  color: var(--nav-bg);
}

.recipe-details ul {
  list-style: none;
  padding-left: 1rem;
  margin-bottom: 1rem;
}

.recipe-details li {
  margin-bottom: 0.25rem;
  position: relative;
}

.recipe-details li::before {
  content: "•";
  color: var(--nav-bg);
  font-weight: bold;
  position: absolute;
  left: -1rem;
}

.instructions {
  list-style-type: decimal;
  padding-left: 1.5rem;
  margin-bottom: 1rem;
}

.instructions li {
  margin-bottom: 0.5rem;
  line-height: 1.4;
}

button {
  background: var(--button-bg);
  color: var(--nav-text);
  border: none;
  padding: 0.5rem 1rem;
  border-radius: 5px;
  cursor: pointer;
  font-size: 0.9rem;
  transition: var(--transition);
}

button:hover {
  background: var(--button-hover);
  transform: scale(1.05);
}

/* About and Sources Pages */
.about-page, .sources-page {
  max-width: 800px;
  margin: 0 auto;
  padding: 2rem;
  text-align: center;
  animation: fadeInUp 1s ease-out;
}

.sources-page ul {
  list-style: none;
  padding: 0;
}

.sources-page li {
  margin-bottom: 1rem;
}

.sources-page a {
  display: inline-block;
  padding: 0.5rem 1rem;
  background: var(--card-bg);
  border-radius: 5px;
  box-shadow: 0 2px 10px var(--shadow);
  transition: var(--transition);
}

.sources-page a:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 15px var(--shadow);
}

/* Footer */
footer {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  text-align: center;
  padding: 1rem;
  background: var(--card-bg);
  border-top: 1px solid var(--input-border);
  color: var(--text-color);
  opacity: 0.8;
  z-index: 100;
}

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

/* Responsive Design */
@media (max-width: 768px) {
  nav ul {
    flex-direction: column;
    gap: 1rem;
  }

  .home-page, .recipes-page {
    padding: 1rem;
  }

  .disease-details {
    flex-direction: column;
  }

  .filters {
    flex-direction: column;
    align-items: center;
  }

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

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