/* ===================================
   Grameena Vayanasala Kumbalangad
   Main Stylesheet
   =================================== */

/* ===== CSS Custom Properties ===== */
:root {
  /* Kerala-Inspired Color Palette */
  --color-primary: #2d5016;        /* Deep forest green */
  --color-primary-light: #4a7c2c;  /* Lighter green */
  --color-primary-dark: #1a3009;   /* Darker green */
  
  --color-secondary: #8b6914;      /* Golden earth tone */
  --color-secondary-light: #b8941f;
  --color-secondary-dark: #5c4609;
  
  --color-accent: #c85a3a;         /* Terracotta */
  --color-accent-light: #e07456;
  
  --color-bg-primary: #fdfbf7;     /* Warm ivory */
  --color-bg-secondary: #f5f1e8;   /* Light beige */
  --color-bg-dark: #2a2a2a;
  
  --color-text-primary: #2a2a2a;
  --color-text-secondary: #5a5a5a;
  --color-text-light: #ffffff;
  
  --color-border: #d4cdb8;
  --color-border-light: #e8e4d8;
  
  --color-success: #4a7c2c;
  --color-warning: #f39c12;
  --color-error: #c0392b;
  --color-info: #3498db;
  
  /* Typography */
  --font-primary: 'Poppins', 'Noto Sans Malayalam', sans-serif;
  --font-secondary: 'Merriweather', 'Noto Serif Malayalam', serif;
  
  --font-size-xs: 0.75rem;    /* 12px */
  --font-size-sm: 0.875rem;   /* 14px */
  --font-size-base: 1rem;     /* 16px */
  --font-size-lg: 1.125rem;   /* 18px */
  --font-size-xl: 1.25rem;    /* 20px */
  --font-size-2xl: 1.5rem;    /* 24px */
  --font-size-3xl: 2rem;      /* 32px */
  --font-size-4xl: 2.5rem;    /* 40px */
  --font-size-5xl: 3rem;      /* 48px */
  
  /* Spacing */
  --spacing-xs: 0.25rem;   /* 4px */
  --spacing-sm: 0.5rem;    /* 8px */
  --spacing-md: 1rem;      /* 16px */
  --spacing-lg: 1.5rem;    /* 24px */
  --spacing-xl: 2rem;      /* 32px */
  --spacing-2xl: 3rem;     /* 48px */
  --spacing-3xl: 4rem;     /* 64px */
  
  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.15);
  
  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;
  
  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-base: 250ms ease-in-out;
  --transition-slow: 350ms ease-in-out;
  
  /* Layout */
  --container-max-width: 1200px;
  --header-height: 80px;
}

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

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

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

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

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-base);
}

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

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-secondary);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
  color: var(--color-primary-dark);
}

h1 { font-size: var(--font-size-5xl); }
h2 { font-size: var(--font-size-4xl); }
h3 { font-size: var(--font-size-3xl); }
h4 { font-size: var(--font-size-2xl); }
h5 { font-size: var(--font-size-xl); }
h6 { font-size: var(--font-size-lg); }

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

/* ===== Layout ===== */
.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.section {
  padding: var(--spacing-3xl) 0;
}

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

/* ===== Header & Navigation ===== */
.header {
  position: sticky;
  top: 0;
  background-color: var(--color-bg-primary);
  box-shadow: var(--shadow-md);
  z-index: 1000;
  height: var(--header-height);
}

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

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

.logo-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: var(--font-size-2xl);
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: var(--spacing-xl);
  align-items: center;
}

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

.nav-link:hover,
.nav-link.active {
  color: var(--color-primary);
  background-color: var(--color-bg-secondary);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-sm);
}

.nav-toggle span {
  width: 25px;
  height: 3px;
  background-color: var(--color-primary);
  border-radius: var(--radius-full);
  transition: all var(--transition-base);
}

/* ===== Hero Section ===== */
.hero {
  background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 100%);
  color: var(--color-text-light);
  padding: var(--spacing-3xl) 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: 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: 0.3;
}

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

.hero h1 {
  color: var(--color-text-light);
  font-size: var(--font-size-5xl);
  margin-bottom: var(--spacing-md);
}

.hero-tagline {
  font-size: var(--font-size-xl);
  margin-bottom: var(--spacing-xl);
  opacity: 0.95;
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: var(--spacing-2xl);
  margin-top: var(--spacing-2xl);
  flex-wrap: wrap;
}

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

.stat-number {
  font-size: var(--font-size-4xl);
  font-weight: 700;
  color: var(--color-secondary-light);
  display: block;
}

.stat-label {
  font-size: var(--font-size-sm);
  opacity: 0.9;
}

/* ===== Buttons ===== */
.btn {
  display: inline-block;
  padding: var(--spacing-md) var(--spacing-xl);
  font-family: var(--font-primary);
  font-size: var(--font-size-base);
  font-weight: 600;
  text-align: center;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
}

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

.btn-primary:hover {
  background-color: var(--color-primary-light);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

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

.btn-secondary:hover {
  background-color: var(--color-secondary-light);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

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

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

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

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

.btn-group {
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

/* ===== Cards ===== */
.card {
  background-color: var(--color-text-light);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: var(--spacing-xl);
  transition: all var(--transition-base);
}

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

.card-header {
  margin-bottom: var(--spacing-lg);
}

.card-title {
  font-size: var(--font-size-2xl);
  margin-bottom: var(--spacing-sm);
}

.card-body {
  color: var(--color-text-secondary);
}

.card-footer {
  margin-top: var(--spacing-lg);
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--color-border-light);
}

/* ===== Grid System ===== */
.grid {
  display: grid;
  gap: var(--spacing-xl);
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

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

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

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: var(--spacing-md);
  font-family: var(--font-primary);
  font-size: var(--font-size-base);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: var(--color-text-light);
  transition: all var(--transition-base);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(45, 80, 22, 0.1);
}

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

/* ===== Search & Filter ===== */
.search-bar {
  position: relative;
  margin-bottom: var(--spacing-xl);
}

.search-input {
  width: 100%;
  padding: var(--spacing-md) var(--spacing-md) var(--spacing-md) 3rem;
  font-size: var(--font-size-lg);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
}

.search-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: var(--shadow-lg);
}

.search-icon {
  position: absolute;
  left: var(--spacing-md);
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-secondary);
  font-size: var(--font-size-xl);
}

.filter-group {
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
  margin-bottom: var(--spacing-xl);
}

.filter-btn {
  padding: var(--spacing-sm) var(--spacing-lg);
  background-color: var(--color-bg-secondary);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-base);
  font-weight: 500;
}

.filter-btn:hover,
.filter-btn.active {
  background-color: var(--color-primary);
  color: var(--color-text-light);
  border-color: var(--color-primary);
}

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

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-2xl);
  margin-bottom: var(--spacing-xl);
}

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

.footer-section p,
.footer-section a {
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: var(--spacing-sm);
}

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

.footer-bottom {
  text-align: center;
  padding-top: var(--spacing-lg);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.6);
}

.social-links {
  display: flex;
  gap: var(--spacing-md);
  margin-top: var(--spacing-md);
}

.social-link {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-full);
  transition: all var(--transition-base);
}

.social-link:hover {
  background-color: var(--color-secondary);
  transform: translateY(-3px);
}

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

.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }

.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }

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

/* ===== Responsive Design ===== */
@media (max-width: 768px) {
  :root {
    --font-size-5xl: 2rem;
    --font-size-4xl: 1.75rem;
    --font-size-3xl: 1.5rem;
  }
  
  .nav-menu {
    position: fixed;
    top: var(--header-height);
    left: -100%;
    width: 100%;
    height: calc(100vh - var(--header-height));
    background-color: var(--color-bg-primary);
    flex-direction: column;
    align-items: flex-start;
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-xl);
    transition: left var(--transition-base);
    gap: var(--spacing-md);
  }
  
  .nav-menu.active {
    left: 0;
  }
  
  .nav-toggle {
    display: flex;
  }
  
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }
  
  .hero-stats {
    gap: var(--spacing-lg);
  }
  
  .btn-group {
    flex-direction: column;
  }
  
  .btn {
    width: 100%;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 var(--spacing-md);
  }
  
  .section {
    padding: var(--spacing-2xl) 0;
  }
}