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

body {
  font-family: 'Inter', Arial, sans-serif;
  margin: 0;
  padding: 0;
  background: linear-gradient(135deg, #181c24 0%, #232a34 100%);
  color: #e3e8ee;
  min-height: 100vh;
}
nav {
  background: #232a34;
  box-shadow: 0 2px 8px rgba(0,0,0,0.15);
  padding: 0.5em 0;
  position: sticky;
  top: 0;
  z-index: 100;
}
nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
}
nav ul li {
  margin: 0 1em;
}
nav ul li a {
  color: #e3e8ee;
  text-decoration: none;
  font-weight: 600;
  padding: 0.5em 1em;
  border-radius: 6px;
  transition: background 0.2s, color 0.2s, box-shadow 0.2s;
  letter-spacing: 0.5px;
  display: inline-block;
}
nav ul li a:hover, nav ul li a:focus {
  background: linear-gradient(90deg, #0078d7 0%, #00c6fb 100%);
  color: #fff;
  box-shadow: 0 2px 8px rgba(0,120,215,0.15);
}
main {
  max-width: 900px;
  margin: 3em auto 2em auto;
  background: rgba(30, 34, 44, 0.98);
  padding: 2.5em 2em;
  border-radius: 18px;
  box-shadow: 0 4px 32px rgba(0,0,0,0.18);
  position: relative;
}
h1, h2, h3 {
  color: #00c6fb;
  font-weight: 600;
  margin-top: 0;
  letter-spacing: 1px;
}
h1 {
  font-size: 2.5em;
  margin-bottom: 0.5em;
}
h2 {
  font-size: 1.5em;
  margin-top: 1.5em;
}
section {
  margin-bottom: 2em;
  background: rgba(36, 41, 54, 0.92);
  border-radius: 12px;
  padding: 1.5em 1.2em;
  box-shadow: 0 2px 12px rgba(0,198,251,0.04);
}
ul, ol {
  padding-left: 1.5em;
}
li {
  margin-bottom: 0.5em;
}
a {
  color: #00c6fb;
  transition: color 0.2s;
}
a:hover, a:focus {
  color: #0078d7;
}
address {
  font-style: normal;
  color: #b0b8c9;
  margin-top: 1em;
}
@media (max-width: 900px) {
  main {
    padding: 1.2em 0.5em;
  }
}
@media (max-width: 600px) {
  main {
    padding: 0.7em 0.2em;
  }
  nav ul {
    flex-direction: column;
    align-items: center;
  }
  nav ul li {
    margin: 0.5em 0;
  }
  h1 {
    font-size: 2em;
  }
  h2 {
    font-size: 1.1em;
  }
  section {
    padding: 1em 0.5em;
  }
}
::-webkit-scrollbar {
  width: 8px;
  background: #f5f7fa;
}
::-webkit-scrollbar-thumb {
  background: #754ffe;
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: #5a3fd8;
}
.card.bg-white {
  background: #fff !important;
  color: #212529 !important;
}