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

:root {
  --bg-primary: hsl(220, 20%, 8%);
  --bg-secondary: hsl(220, 18%, 12%);
  --bg-card: hsl(220, 16%, 15%);
  --text-primary: hsl(0, 0%, 95%);
  --text-secondary: hsl(0, 0%, 70%);
  --accent: hsl(210, 100%, 55%);
  --accent-hover: hsl(210, 100%, 65%);
  --border: hsl(220, 15%, 20%);
  --header-bg: hsla(220, 20%, 8%, 0.95);
}

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  line-height: 1.6;
  overflow-x: hidden;
}

#topheader {
  height: 64px;
  position: fixed;
  background: var(--header-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  z-index: 100;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
}

#logo {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
}

#logo-icon {
  font-size: 1.5em;
}

#topTitle {
  font-size: 1.1em;
  font-weight: 700;
  color: var(--text-primary);
}

.nav {
  display: flex;
  gap: 24px;
}

.nav a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9em;
  font-weight: 500;
  transition: color 0.2s;
}

.nav a:hover {
  color: var(--text-primary);
}

footer {
  border-top: 1px solid var(--border);
  padding: 32px 24px;
  background: var(--bg-secondary);
}

#footer-content {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

#footer-content p {
  color: var(--text-secondary);
  font-size: 0.85em;
}

#footer-links {
  display: flex;
  gap: 20px;
}

#footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.85em;
  transition: color 0.2s;
}

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

@media (max-width: 600px) {
  #topheader {
    padding: 0 16px;
  }

  #footer-content {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }
}