/* CropPulse Professional Stylesheet */

/* CSS Variables for consistent theming */
:root {
  --primary-color: #2e7d32;
  --primary-light: #43a047;
  --primary-dark: #1b5e20;
  --secondary-color: #66bb6a;
  --accent-color: #4caf50;
  --background-color: #f8f9fa;
  --surface-color: #ffffff;
  --text-primary: #212529;
  --text-secondary: #6c757d;
  --text-light: #ffffff;
  --border-color: #dee2e6;
  --shadow-light: 0 2px 4px rgba(0,0,0,0.1);
  --shadow-medium: 0 4px 8px rgba(0,0,0,0.15);
  --shadow-heavy: 0 8px 16px rgba(0,0,0,0.2);
  --border-radius: 8px;
  --border-radius-large: 12px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font-family: 'Inter', 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
}

/* Reset and Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.2;
  margin-bottom: 1rem;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

p {
  margin-bottom: 1rem;
  color: var(--text-secondary);
}

/* Header Styles */
header {
  background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
  color: var(--text-light);
  padding: 1rem 2rem;
  box-shadow: var(--shadow-medium);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-content {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.5rem;
  font-weight: 700;
  text-decoration: none;
  color: var(--text-light);
}

.logo img {
  width: 40px;
  height: 40px;
  border-radius: 50%;
}

nav {
  display: flex;
  gap: 2rem;
  align-items: center;
}

nav a {
  color: var(--text-light);
  text-decoration: none;
  font-weight: 500;
  padding: 0.5rem 1rem;
  border-radius: var(--border-radius);
  transition: var(--transition);
  position: relative;
}

nav a:hover {
  background-color: rgba(255, 255, 255, 0.1);
  transform: translateY(-1px);
}

/* Main Content */
main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem;
  min-height: calc(100vh - 200px);
}

/* Hero Section */
.hero {
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: var(--text-light);
  text-align: center;
  padding: 4rem 2rem;
  border-radius: var(--border-radius-large);
  margin-bottom: 3rem;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="25" cy="25" r="1" fill="rgba(255,255,255,0.1)"/><circle cx="75" cy="75" r="1" fill="rgba(255,255,255,0.1)"/><circle cx="50" cy="10" r="0.5" fill="rgba(255,255,255,0.05)"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
  opacity: 0.3;
}

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

.hero h1 {
  font-size: 3rem;
  margin-bottom: 1rem;
  text-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

.hero p {
  font-size: 1.25rem;
  margin-bottom: 2rem;
  color: rgba(255, 255, 255, 0.9);
}

/* Button Styles */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--accent-color);
  color: var(--text-light);
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: var(--border-radius);
  font-size: 1rem;
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: var(--shadow-light);
}

.btn:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-medium);
}

.btn:active {
  transform: translateY(0);
}

.btn-secondary {
  background: transparent;
  color: var(--primary-color);
  border: 2px solid var(--primary-color);
}

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

.btn-large {
  padding: 1rem 2rem;
  font-size: 1.125rem;
}

/* Card Components */
.card {
  background: var(--surface-color);
  border-radius: var(--border-radius-large);
  padding: 2rem;
  box-shadow: var(--shadow-light);
  border: 1px solid var(--border-color);
  transition: var(--transition);
}

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

.card-header {
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border-color);
}

.card-title {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.card-subtitle {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* Form Styles */
.form-group {
  margin-bottom: 1.5rem;
}

.form-label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
  color: var(--text-primary);
}

.form-input {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 2px solid var(--border-color);
  border-radius: var(--border-radius);
  font-size: 1rem;
  transition: var(--transition);
  background: var(--surface-color);
}

.form-input:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(67, 160, 71, 0.1);
}

.form-input::placeholder {
  color: var(--text-secondary);
}

/* Grid Layouts */
.grid {
  display: grid;
  gap: 2rem;
}

.grid-2 { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); }
.grid-4 { grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); }

/* Features Section */
.features {
  margin: 4rem 0;
}

.feature-card {
  text-align: center;
  padding: 2rem;
  background: var(--surface-color);
  border-radius: var(--border-radius-large);
  box-shadow: var(--shadow-light);
  transition: var(--transition);
}

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

.feature-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
  display: block;
}

.feature-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.feature-description {
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Chat Interface */
.chat-container {
  background: var(--surface-color);
  border-radius: var(--border-radius-large);
  box-shadow: var(--shadow-light);
  overflow: hidden;
  height: 500px;
  display: flex;
  flex-direction: column;
}

.chat-header {
  background: var(--primary-color);
  color: var(--text-light);
  padding: 1rem;
  text-align: center;
  font-weight: 600;
}

.chat-messages {
  flex: 1;
  padding: 1rem;
  overflow-y: auto;
  background: #f8f9fa;
}

.message {
  margin-bottom: 1rem;
  padding: 0.75rem 1rem;
  border-radius: var(--border-radius);
  max-width: 80%;
}

.message.user {
  background: var(--primary-color);
  color: var(--text-light);
  margin-left: auto;
  text-align: right;
}

.message.bot {
  background: var(--surface-color);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.chat-input-container {
  padding: 1rem;
  background: var(--surface-color);
  border-top: 1px solid var(--border-color);
  display: flex;
  gap: 0.5rem;
}

.chat-input {
  flex: 1;
  padding: 0.75rem;
  border: 2px solid var(--border-color);
  border-radius: var(--border-radius);
  font-size: 1rem;
}

.chat-input:focus {
  outline: none;
  border-color: var(--primary-color);
}

/* Results Grid */
.results-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 1rem;
  margin: 2rem 0;
}

.result-block {
  aspect-ratio: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--border-radius);
  color: var(--text-light);
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.result-block:hover {
  transform: scale(1.05);
  box-shadow: var(--shadow-medium);
}

.result-block.healthy {
  background: linear-gradient(135deg, #4caf50, #66bb6a);
}

.result-block.warning {
  background: linear-gradient(135deg, #ff9800, #ffb74d);
  color: var(--text-primary);
}

.result-block.critical {
  background: linear-gradient(135deg, #f44336, #ef5350);
}

.result-tooltip {
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%);
  background: var(--text-primary);
  color: var(--text-light);
  padding: 0.5rem 1rem;
  border-radius: var(--border-radius);
  font-size: 0.875rem;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: var(--transition);
  z-index: 10;
}

.result-block:hover .result-tooltip {
  opacity: 1;
  transform: translateX(-50%) translateY(-4px);
}

/* Footer */
footer {
  background: var(--primary-dark);
  color: var(--text-light);
  text-align: center;
  padding: 2rem;
  margin-top: 4rem;
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
}

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

.footer-links a {
  color: var(--text-light);
  text-decoration: none;
  transition: var(--transition);
}

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

/* Responsive Design */
@media (max-width: 768px) {
  .header-content {
    flex-direction: column;
    gap: 1rem;
  }
  
  nav {
    gap: 1rem;
  }
  
  .hero h1 {
    font-size: 2rem;
  }
  
  .hero p {
    font-size: 1rem;
  }
  
  main {
    padding: 1rem;
  }
  
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }
  
  .results-grid {
    grid-template-columns: repeat(auto-fit, minmax(80px, 1fr));
  }
  
  .chat-container {
    height: 400px;
  }
}

@media (max-width: 480px) {
  .hero {
    padding: 2rem 1rem;
  }
  
  .hero h1 {
    font-size: 1.75rem;
  }
  
  .card {
    padding: 1.5rem;
  }
  
  .btn {
    padding: 0.625rem 1.25rem;
    font-size: 0.9rem;
  }
}

/* Loading States */
.loading {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 3px solid rgba(255,255,255,.3);
  border-radius: 50%;
  border-top-color: #fff;
  animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Utility Classes */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

.hidden { display: none; }
.visible { display: block; }

.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }

.w-full { width: 100%; }
.h-full { height: 100%; }