:root {
  --primary: #2C3E50;
  --primary-dark: #1A252F;
  --accent: #E74C3C;
  --accent-hover: #C0392B;
  --bg-primary: #FFFFFF;
  --bg-secondary: #ECF0F1;
  --bg-card: #fff;
  --text-primary: #2C3E50;
  --text-secondary: #7F8C8D;
  --border-color: #BDC3C7;
  --font-heading: 'Lato', sans-serif;
  --font-body: 'Open Sans', sans-serif;
  --font-label: 'Montserrat', sans-serif;
  --border-width: 3px;
  --shadow-primary: 4px 4px 0px #000;
  --radius: 0px;
}

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

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

body {
  font-family: var(--font-body);
  font-size: 18px;
  line-height: 1.7;
  color: var(--text-primary);
  background: var(--bg-primary);
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1rem;
}

h1 {
  font-size: 44px;
  font-weight: 700;
}

h2 {
  font-size: 36px;
  font-weight: 700;
}

h3 {
  font-size: 28px;
  font-weight: 600;
}

h4 {
  font-size: 24px;
  font-weight: 600;
}

h5 {
  font-size: 20px;
  font-weight: 600;
}

h6 {
  font-size: 18px;
  font-weight: 600;
}

p {
  margin-bottom: 1.5rem;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: all 0.3s ease;
}

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

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

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.row {
  display: flex;
  flex-wrap: wrap;
  margin: 0 -15px;
}

.col {
  padding: 0 15px;
}

.col-1 { flex: 0 0 8.333%; }
.col-2 { flex: 0 0 16.666%; }
.col-3 { flex: 0 0 25%; }
.col-4 { flex: 0 0 33.333%; }
.col-6 { flex: 0 0 50%; }
.col-8 { flex: 0 0 66.666%; }
.col-9 { flex: 0 0 75%; }
.col-12 { flex: 0 0 100%; }

.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; }
.mb-5 { margin-bottom: 3rem; }

.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; }

.py-1 { padding: 0.5rem 0; }
.py-2 { padding: 1rem 0; }
.py-3 { padding: 1.5rem 0; }
.py-4 { padding: 2rem 0; }
.py-5 { padding: 3rem 0; }

.px-1 { padding: 0 0.5rem; }
.px-2 { padding: 0 1rem; }
.px-3 { padding: 0 1.5rem; }
.px-4 { padding: 0 2rem; }
.px-5 { padding: 0 3rem; }

.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.8s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 768px) {
  .container {
    padding: 0 15px;
  }
  
  .col-4, .col-6, .col-8 {
    flex: 0 0 100%;
  }
  
  h1 {
    font-size: 32px;
  }
  
  h2 {
    font-size: 28px;
  }
  
  body {
    font-size: 16px;
  }
}

@media (max-width: 480px) {
  h1 {
    font-size: 28px;
  }
  
  h2 {
    font-size: 24px;
  }
}