:root {
  --primary-color: #2e2a5e; /* Dark blue from the IA logo */
  --background-color: #ffffff;
  --text-color: #333333;
  --header-color: #222222;
  --accent-color: #5bbad5;
  --section-padding: 4rem 2rem;
}

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

html, body {
  height: 100%;
}

body {
  font-family: 'Arial', sans-serif;
  line-height: 1.6;
  color: var(--text-color);
  background-color: var(--background-color);
  display: flex;
  flex-direction: column;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 15px;
}

header {
  background-color: var(--background-color);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  padding: 1.5rem 0;
  position: fixed;
  width: 100%;
  top: 0;
  z-index: 100;
}

.logo {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--primary-color);
  text-decoration: none;
  display: flex;
  align-items: center;
}

.logo-img {
  height: 40px;
  width: 40px;
  margin-right: 10px;
  border-radius: 4px;
}

.hero {
  padding: var(--section-padding);
  padding-top: 8rem;
}

.hero .container {
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero h1 {
  font-size: 3rem;
  margin-bottom: 1rem;
  color: var(--header-color);
}

.hero p {
  font-size: 1.2rem;
  max-width: 600px;
  margin: 0 auto 2rem;
}

@media (min-width: 768px) {
  .hero p {
    margin: 0 0 2rem;
  }
}

.hero-image {
  display: flex;
  justify-content: center;
  max-width: 100%;
}

.hero-img {
  max-width: 100%;
  height: auto;
  border-radius: 8px;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
  display: block; /* Prevent layout shift */
}

@media (min-width: 768px) {
  .hero-img {
    max-width: 450px;
  }
}

.btn {
  display: inline-block;
  background-color: var(--primary-color);
  color: white;
  padding: 0.8rem 1.8rem;
  border-radius: 5px;
  text-decoration: none;
  font-weight: 600;
  transition: background-color 0.3s;
}

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

main {
  flex: 1 0 auto; /* This makes main grow to fill available space */
}

footer {
  background-color: var(--primary-color);
  color: white;
  text-align: center;
  padding: 2rem 0;
  margin-top: auto; /* Push footer to bottom when content is short */
  flex-shrink: 0; /* Prevent footer from shrinking */
}