:root {
  --bg-primary: #0f172a;
  --bg-card: #1e293b;
  --accent-color: #38bdf8;
  --accent-hover: #0284c7;
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --border-color: #334155;
  --success-color: #22c55e;
  --radius: 12px;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-main);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

header {
  background-color: rgba(30, 41, 59, 0.9);
  backdrop-filter: blur(8px);
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid var(--border-color);
}

.nav-container {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem;
}

.logo {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--accent-color);
  text-decoration: none;
}

.nav-links {
  display: flex;
  gap: 12px;
  list-style: none;
  overflow-x: auto;
  padding-bottom: 4px;
}

.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-weight: 500;
  padding: 6px 12px;
  border-radius: 20px;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.nav-links a:hover, .nav-links a.active {
  color: var(--text-main);
  background-color: var(--border-color);
}

main {
  flex: 1;
  max-width: 1100px;
  width: 100%;
  margin: 0 auto;
  padding: 20px 16px;
}

footer {
  background-color: var(--bg-card);
  border-top: 1px solid var(--border-color);
  text-align: center;
  padding: 20px 16px;
  margin-top: 40px;
  color: var(--text-muted);
  font-size: 0.9rem;
}

footer a {
  color: var(--accent-color);
  text-decoration: none;
}