/* Main CSS for Tek Index Website */

/* Global Styles */
:root {
  --primary-color: #0047AB; /* Tek Index blue from logo */
  --secondary-color: #004080;
  --accent-color: #f8f9fa;
  --text-color: #333333;
  --light-text: #ffffff;
  --dark-text: #212529;
  --border-color: #dee2e6;
  --shadow-color: rgba(0, 0, 0, 0.1);
  --transition-speed: 0.3s;
  --container-width: 1200px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Roboto', Arial, sans-serif;
  line-height: 1.6;
  color: var(--text-color);
  background-color: #ffffff;
  overflow-x: hidden;
}

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

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

.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 20px;
}

.btn {
  display: inline-block;
  padding: 10px 25px;
  background-color: var(--primary-color);
  color: var(--light-text);
  border: none;
  border-radius: 4px;
  cursor: pointer;
  transition: background-color var(--transition-speed) ease;
  font-weight: 500;
  text-align: center;
}

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

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

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

/* Section Styles */
section {
  padding: 80px 0;
}

.section-title {
  font-size: 2.5rem;
  margin-bottom: 1.5rem;
  color: var(--dark-text);
  text-align: center;
  position: relative;
}

.section-title:after {
  content: '';
  display: block;
  width: 80px;
  height: 4px;
  background-color: var(--primary-color);
  margin: 15px auto 0;
}

.section-subtitle {
  font-size: 1.2rem;
  text-align: center;
  margin-bottom: 3rem;
  color: #666;
}

/* Hero Banner */
.hero-banner {
  position: relative;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  color: var(--light-text);
  text-align: center;
  padding: 150px 0;
  margin-bottom: 40px;
}

.hero-banner::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
}

.hero-title {
  font-size: 3.5rem;
  margin-bottom: 1rem;
  font-weight: 700;
}

.hero-subtitle {
  font-size: 1.5rem;
  margin-bottom: 2rem;
  font-weight: 300;
}

/* Grid System */
.row {
  display: flex;
  flex-wrap: wrap;
  margin: 0 -15px;
}

.col {
  padding: 0 15px;
  flex: 1;
}

.col-1 { flex: 0 0 8.33%; max-width: 8.33%; }
.col-2 { flex: 0 0 16.66%; max-width: 16.66%; }
.col-3 { flex: 0 0 25%; max-width: 25%; }
.col-4 { flex: 0 0 33.33%; max-width: 33.33%; }
.col-5 { flex: 0 0 41.66%; max-width: 41.66%; }
.col-6 { flex: 0 0 50%; max-width: 50%; }
.col-7 { flex: 0 0 58.33%; max-width: 58.33%; }
.col-8 { flex: 0 0 66.66%; max-width: 66.66%; }
.col-9 { flex: 0 0 75%; max-width: 75%; }
.col-10 { flex: 0 0 83.33%; max-width: 83.33%; }
.col-11 { flex: 0 0 91.66%; max-width: 91.66%; }
.col-12 { flex: 0 0 100%; max-width: 100%; }

/* Card Styles */
.card {
  background-color: #fff;
  border-radius: 8px;
  box-shadow: 0 4px 8px var(--shadow-color);
  overflow: hidden;
  margin-bottom: 30px;
  transition: transform var(--transition-speed) ease, box-shadow var(--transition-speed) ease;
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 16px var(--shadow-color);
}

.card-img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.card-body {
  padding: 20px;
}

.card-title {
  font-size: 1.5rem;
  margin-bottom: 10px;
  color: var(--dark-text);
}

.card-text {
  color: #666;
  margin-bottom: 15px;
}

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

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }
.mt-5 { margin-top: 3rem; }

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }
.mb-5 { margin-bottom: 3rem; }

.p-1 { padding: 0.5rem; }
.p-2 { padding: 1rem; }
.p-3 { padding: 1.5rem; }
.p-4 { padding: 2rem; }
.p-5 { padding: 3rem; }

.center-button {
  text-align: center;
}

/* Responsive Styles */
@media (max-width: 992px) {
  .section-title {
    font-size: 2rem;
  }
  
  .hero-title {
    font-size: 2.8rem;
  }
  
  .hero-subtitle {
    font-size: 1.3rem;
  }
  
  .hero-banner {
    padding: 120px 0;
  }
}

@media (max-width: 768px) {
  .col-md-1 { flex: 0 0 8.33%; max-width: 8.33%; }
  .col-md-2 { flex: 0 0 16.66%; max-width: 16.66%; }
  .col-md-3 { flex: 0 0 25%; max-width: 25%; }
  .col-md-4 { flex: 0 0 33.33%; max-width: 33.33%; }
  .col-md-5 { flex: 0 0 41.66%; max-width: 41.66%; }
  .col-md-6 { flex: 0 0 50%; max-width: 50%; }
  .col-md-7 { flex: 0 0 58.33%; max-width: 58.33%; }
  .col-md-8 { flex: 0 0 66.66%; max-width: 66.66%; }
  .col-md-9 { flex: 0 0 75%; max-width: 75%; }
  .col-md-10 { flex: 0 0 83.33%; max-width: 83.33%; }
  .col-md-11 { flex: 0 0 91.66%; max-width: 91.66%; }
  .col-md-12 { flex: 0 0 100%; max-width: 100%; }
  
  .section-title {
    font-size: 1.8rem;
  }
  
  .hero-title {
    font-size: 2.2rem;
  }
  
  .hero-subtitle {
    font-size: 1.1rem;
  }
  
  .hero-banner {
    padding: 100px 0;
  }
}

@media (max-width: 576px) {
  .col-sm-1 { flex: 0 0 8.33%; max-width: 8.33%; }
  .col-sm-2 { flex: 0 0 16.66%; max-width: 16.66%; }
  .col-sm-3 { flex: 0 0 25%; max-width: 25%; }
  .col-sm-4 { flex: 0 0 33.33%; max-width: 33.33%; }
  .col-sm-5 { flex: 0 0 41.66%; max-width: 41.66%; }
  .col-sm-6 { flex: 0 0 50%; max-width: 50%; }
  .col-sm-7 { flex: 0 0 58.33%; max-width: 58.33%; }
  .col-sm-8 { flex: 0 0 66.66%; max-width: 66.66%; }
  .col-sm-9 { flex: 0 0 75%; max-width: 75%; }
  .col-sm-10 { flex: 0 0 83.33%; max-width: 83.33%; }
  .col-sm-11 { flex: 0 0 91.66%; max-width: 91.66%; }
  .col-sm-12 { flex: 0 0 100%; max-width: 100%; }
  
  .section-title {
    font-size: 1.6rem;
  }
  
  .hero-title {
    font-size: 1.8rem;
  }
  
  .hero-subtitle {
    font-size: 1rem;
  }
  
  .hero-banner {
    padding: 80px 0;
  }
}