:root {
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  color: #111827;
  background: #f7f8fa;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
}

.topbar {
  display: flex;
  align-items: center;
  gap: 2rem;
  padding: 1rem 1.5rem;
  background: #ffffff;
  border-bottom: 1px solid #e5e7eb;
}

.brand {
  color: #111827;
  font-size: 1.2rem;
  font-weight: 700;
  text-decoration: none;
}

nav {
  display: flex;
  gap: 1rem;
  flex: 1;
}

nav a {
  color: #374151;
  text-decoration: none;
}

.session {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.9rem;
}

button,
.button {
  appearance: none;
  border: 1px solid #d1d5db;
  border-radius: 0.5rem;
  background: #ffffff;
  color: #111827;
  padding: 0.55rem 0.8rem;
  text-decoration: none;
  cursor: pointer;
}

main {
  max-width: 960px;
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1rem;
}

.card {
  background: #ffffff;
  border: 1px solid #e5e7eb;
  border-radius: 0.75rem;
  padding: 1.25rem;
}

.card h2 {
  margin-top: 0;
}

.muted {
  color: #6b7280;
}

.status {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

@media (max-width: 760px) {
  .topbar {
    align-items: flex-start;
    flex-direction: column;
    gap: 0.75rem;
  }

  nav,
  .session {
    width: 100%;
  }
}