@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@600;700&family=Open+Sans:wght@400;600&display=swap');

:root {
  /* Dark Gradient Background */
  --bg-gradient-start: #141E30;
  --bg-gradient-end: #243B55;
  
  /* Text Colors */
  --text-color-main: #ecf0f1;
  --text-color-card: #333;
  --header-color-main: #fff;
  --header-color-card: #2c3e50;
  --container-bg: #fff;
  
  /* Accents */
  --accent-color: #f1c40f;
  --accent-color-card: #d35400;
  --nav-link-color: #fff;
  --nav-link-hover: #f1c40f;
}

body {
  margin: 0;
  padding: 0;
  font-family: 'Open Sans', sans-serif;
  background: linear-gradient(135deg, var(--bg-gradient-start), var(--bg-gradient-end));
  color: var(--text-color-main);
  min-height: 100vh;
  line-height: 1.6;
}

.container {
  max-width: 900px;
  margin: 40px auto;
  background: var(--container-bg);
  padding: 40px;
  border-radius: 12px;
  box-shadow: 0 15px 35px rgb(0 0 0 / 10%);
  color: var(--text-color-card);
}

h1, h2, h3, h4, h5, h6 {
  font-family: Montserrat, sans-serif;
  border-left: 4px solid var(--header-color-card);
  padding-left: 15px;
  margin-top: 40px;
}

header h1 {
  margin: 0;
  font-size: 2rem;
  letter-spacing: 1px;
}


.container h1, .container h2, .container h3, .container h4, .container h5, .container h6 {
  color: var(--header-color-card);
}


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

.container a {
  color: var(--accent-color-card);
  font-weight: 600;
}

a:hover {
  text-decoration: underline;
}

/* Header */
header {
  padding: 20px 40px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: rgb(0 0 0 / 20%);
  box-shadow: 0 2px 4px rgb(0 0 0 / 10%);
  margin-bottom: 40px;
}

/* Navigation */
.navigation-menu {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  gap: 30px;
}

.navigation-menu li a {
  color: var(--nav-link-color);
  font-weight: 600;
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.navigation-menu li a:hover {
  color: var(--nav-link-hover);
  text-decoration: none;
}

/* Hamburger */
.hamburger {
  display: none;
  cursor: pointer;
  background: none;
  border: none;
  padding: 10px;
}

.hamburger span {
  display: block;
  width: 25px;
  height: 3px;
  margin: 5px auto;
  background-color: var(--header-color-main);
  transition: all 0.3s ease-in-out;
}

/* Mobile Responsive */
@media (width <= 768px) {
  .hamburger {
    display: block;
  }

  .navigation-menu {
    position: fixed;
    left: -100%;
    top: 70px;
    flex-direction: column;
    background-color: var(--bg-gradient-end);
    width: 100%;
    text-align: center;
    transition: 0.3s;
    box-shadow: 0 10px 27px rgb(0 0 0 / 5%);
    z-index: 100;
    padding-bottom: 20px;
  }

  .navigation-menu.is-active {
    left: 0;
  }

  .navigation-menu li {
    margin: 20px 0;
  }
}