/* ============================================
   FARMER ADVISOR - DESIGN SYSTEM
   Mobile-First, Farmer-Friendly Design
   ============================================ */

/* === FONTS === */
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+Telugu:wght@400;500;600;700&family=Noto+Sans+Devanagari:wght@400;500;600;700&family=Inter:wght@400;500;600;700&display=swap');

/* === CSS VARIABLES === */
:root {
  /* Crop-themed Green Colors */
  --color-bg-primary: #E8F5E9;
  --color-bg-secondary: #C8E6C9;
  --color-bg-white: #FFFFFF;
  --color-bg-light: #F1F8E9;
  
  /* Earthy Accents */
  --color-primary: #4CAF50;
  --color-primary-dark: #388E3C;
  --color-primary-light: #81C784;
  --color-secondary: #8BC34A;
  --color-accent: #FFC107;
  --color-accent-dark: #FFA000;
  
  /* Semantic Colors */
  --color-success: #66BB6A;
  --color-warning: #FFA726;
  --color-danger: #EF5350;
  --color-info: #42A5F5;
  
  /* Text Colors */
  --color-text-primary: #1B5E20;
  --color-text-secondary: #33691E;
  --color-text-muted: #558B2F;
  --color-text-light: #FFFFFF;
  
  /* Shadows & Borders */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.12);
  --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.15);
  --border-radius-sm: 8px;
  --border-radius-md: 12px;
  --border-radius-lg: 16px;
  --border-radius-xl: 24px;
  
  /* Spacing */
  --space-xs: 8px;
  --space-sm: 12px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  
  /* Typography */
  --font-family-telugu: 'Noto Sans Telugu', sans-serif;
  --font-family-hindi: 'Noto Sans Devanagari', sans-serif;
  --font-family-english: 'Inter', sans-serif;
  --font-size-xs: 14px;
  --font-size-sm: 16px;
  --font-size-md: 18px;
  --font-size-lg: 20px;
  --font-size-xl: 24px;
  --font-size-2xl: 32px;
  --font-size-3xl: 40px;
  
  /* Touch Targets */
  --min-touch-size: 44px;
  --button-height: 56px;
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
  --transition-slow: 350ms ease;
}

/* === RESET & BASE === */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  font-family: var(--font-family-telugu);
  font-size: var(--font-size-md);
  line-height: 1.6;
  color: var(--color-text-primary);
  background-color: var(--color-bg-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Language-specific fonts */
body[lang="te"] {
  font-family: var(--font-family-telugu);
}

body[lang="hi"] {
  font-family: var(--font-family-hindi);
}

body[lang="en"] {
  font-family: var(--font-family-english);
}

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

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

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* === TYPOGRAPHY === */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--space-md);
  color: var(--color-text-primary);
}

h1 {
  font-size: var(--font-size-3xl);
}

h2 {
  font-size: var(--font-size-2xl);
}

h3 {
  font-size: var(--font-size-xl);
}

h4 {
  font-size: var(--font-size-lg);
}

p {
  margin-bottom: var(--space-md);
}

/* === LAYOUT === */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.section {
  padding: var(--space-xl) 0;
}

.section-lg {
  padding: var(--space-2xl) 0;
}

/* === HEADER === */
.header {
  background-color: var(--color-bg-white);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 1000;
  padding: var(--space-md) 0;
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-md);
}

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

.logo-icon {
  width: 40px;
  height: 40px;
  font-size: 32px;
}

.tagline {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-top: 4px;
}

/* Language Switcher */
.language-switcher {
  display: flex;
  gap: var(--space-xs);
  background-color: var(--color-bg-light);
  padding: 4px;
  border-radius: var(--border-radius-lg);
}

.lang-btn {
  padding: var(--space-xs) var(--space-md);
  border-radius: var(--border-radius-md);
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
  min-width: 50px;
  text-align: center;
}

.lang-btn:hover {
  background-color: var(--color-bg-secondary);
}

.lang-btn.active {
  background-color: var(--color-primary);
  color: var(--color-text-light);
}

/* === BUTTONS === */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-lg);
  min-height: var(--button-height);
  border-radius: var(--border-radius-md);
  font-size: var(--font-size-md);
  font-weight: 600;
  text-align: center;
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-sm);
  cursor: pointer;
}

.btn:active {
  transform: scale(0.98);
}

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

.btn-primary:hover {
  background-color: var(--color-primary-dark);
  box-shadow: var(--shadow-md);
}

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

.btn-secondary:hover {
  background-color: #7CB342;
  box-shadow: var(--shadow-md);
}

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

.btn-accent:hover {
  background-color: var(--color-accent-dark);
  box-shadow: var(--shadow-md);
}

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

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

.btn-large {
  min-height: 64px;
  font-size: var(--font-size-lg);
  padding: var(--space-lg) var(--space-xl);
}

.btn-icon {
  font-size: 24px;
}

/* === CARDS === */
.card {
  background-color: var(--color-bg-white);
  border-radius: var(--border-radius-lg);
  padding: var(--space-lg);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
}

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

.card-image {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: var(--border-radius-md);
  margin-bottom: var(--space-md);
}

.card-title {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-bottom: var(--space-sm);
  color: var(--color-text-primary);
}

.card-text {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  line-height: 1.5;
}

/* === GRID === */
.grid {
  display: grid;
  gap: var(--space-lg);
}

.grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

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

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

/* === HERO SECTION === */
.hero {
  text-align: center;
  padding: var(--space-2xl) 0;
  background: linear-gradient(135deg, var(--color-bg-secondary) 0%, var(--color-bg-light) 100%);
}

.hero-title {
  font-size: var(--font-size-2xl);
  margin-bottom: var(--space-md);
  color: var(--color-primary-dark);
}

.hero-subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-xl);
}

.hero-actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  max-width: 500px;
  margin: 0 auto;
}

/* === CROP GRID === */
.crop-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: var(--space-md);
  margin-top: var(--space-xl);
}

.crop-card {
  background-color: var(--color-bg-white);
  border-radius: var(--border-radius-lg);
  padding: var(--space-lg);
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-sm);
}

.crop-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  background-color: var(--color-bg-light);
}

.crop-icon {
  font-size: 64px;
  margin-bottom: var(--space-sm);
}

.crop-name {
  font-size: var(--font-size-md);
  font-weight: 600;
  color: var(--color-text-primary);
}

/* === AUDIO PLAYER === */
.audio-player {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  background-color: var(--color-bg-light);
  padding: var(--space-md);
  border-radius: var(--border-radius-md);
  margin: var(--space-md) 0;
}

.audio-btn {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background-color: var(--color-primary);
  color: var(--color-text-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  transition: all var(--transition-fast);
  flex-shrink: 0;
}

.audio-btn:hover {
  background-color: var(--color-primary-dark);
  transform: scale(1.1);
}

.audio-info {
  flex: 1;
}

.audio-title {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text-primary);
}

.audio-duration {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

/* === TABS === */
.tabs {
  display: flex;
  gap: var(--space-xs);
  border-bottom: 2px solid var(--color-bg-secondary);
  margin-bottom: var(--space-lg);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.tab-btn {
  padding: var(--space-md) var(--space-lg);
  font-size: var(--font-size-md);
  font-weight: 600;
  color: var(--color-text-muted);
  border-bottom: 3px solid transparent;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.tab-btn:hover {
  color: var(--color-primary);
}

.tab-btn.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
  animation: fadeIn var(--transition-normal);
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* === FORMS === */
.form-group {
  margin-bottom: var(--space-lg);
}

.form-label {
  display: block;
  font-size: var(--font-size-md);
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: var(--space-sm);
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: var(--space-md);
  font-size: var(--font-size-md);
  font-family: inherit;
  border: 2px solid var(--color-bg-secondary);
  border-radius: var(--border-radius-md);
  background-color: var(--color-bg-white);
  color: var(--color-text-primary);
  transition: all var(--transition-fast);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(76, 175, 80, 0.1);
}

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

.file-upload {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-xl);
  border: 2px dashed var(--color-bg-secondary);
  border-radius: var(--border-radius-md);
  background-color: var(--color-bg-light);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.file-upload:hover {
  border-color: var(--color-primary);
  background-color: var(--color-bg-secondary);
}

.file-upload-icon {
  font-size: 48px;
  color: var(--color-primary);
  margin-bottom: var(--space-sm);
}

.file-upload-text {
  font-size: var(--font-size-md);
  color: var(--color-text-secondary);
  text-align: center;
}

/* === WHATSAPP BUTTON === */
.whatsapp-float {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 64px;
  height: 64px;
  background-color: #25D366;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-lg);
  z-index: 999;
  transition: all var(--transition-normal);
  animation: pulse 2s infinite;
}

.whatsapp-float:hover {
  transform: scale(1.1);
  box-shadow: 0 8px 24px rgba(37, 211, 102, 0.4);
}

.whatsapp-icon {
  font-size: 36px;
  color: white;
}

@keyframes pulse {
  0%, 100% {
    box-shadow: 0 8px 16px rgba(37, 211, 102, 0.3);
  }
  50% {
    box-shadow: 0 8px 24px rgba(37, 211, 102, 0.5);
  }
}

/* === FOOTER === */
.footer {
  background-color: var(--color-primary-dark);
  color: var(--color-text-light);
  padding: var(--space-xl) 0 var(--space-lg);
  margin-top: var(--space-2xl);
}

.footer-content {
  display: grid;
  gap: var(--space-xl);
  margin-bottom: var(--space-lg);
}

.footer-section h3 {
  color: var(--color-text-light);
  margin-bottom: var(--space-md);
}

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

.footer-links li {
  margin-bottom: var(--space-sm);
}

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

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

.footer-bottom {
  text-align: center;
  padding-top: var(--space-lg);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-size: var(--font-size-sm);
}

/* === UTILITIES === */
.text-center {
  text-align: center;
}

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

.mb-sm {
  margin-bottom: var(--space-sm);
}

.mb-md {
  margin-bottom: var(--space-md);
}

.mb-lg {
  margin-bottom: var(--space-lg);
}

.mt-lg {
  margin-top: var(--space-lg);
}

.hidden {
  display: none !important;
}

/* === RESPONSIVE === */
@media (min-width: 768px) {
  :root {
    --font-size-2xl: 40px;
    --font-size-3xl: 48px;
  }
  
  .hero-actions {
    flex-direction: row;
    justify-content: center;
    max-width: 100%;
  }
  
  .crop-grid {
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  }
  
  .footer-content {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  }
}

@media (min-width: 1024px) {
  .container {
    padding: 0 var(--space-lg);
  }
  
  .section {
    padding: var(--space-2xl) 0;
  }
  
  .crop-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* === ACCESSIBILITY === */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Focus visible for keyboard navigation */
*:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
}