* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
  color: #102631;
  background: linear-gradient(180deg, #eff5ff 0%, #f7fbff 45%, #ffffff 100%);
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 1rem;
  background: #103a67;
  color: #fff;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.brand-logo {
  width: 42px;
  height: 42px;
  background: #ffffff;
  border-radius: 8px;
  padding: 4px;
}

.auth-controls {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  flex-wrap: wrap;
}

.tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  background: #d6e5f8;
  border-bottom: 1px solid #b8d1f2;
}

button {
  border: 1px solid #2b5886;
  background: #1a4d80;
  color: #fff;
  border-radius: 6px;
  padding: 0.45rem 0.8rem;
  cursor: pointer;
}

button:hover {
  background: #133f6a;
}

input {
  border: 1px solid #9db5c4;
  border-radius: 6px;
  padding: 0.45rem 0.55rem;
  min-width: 180px;
}

main {
  padding: 1rem;
}

.view {
  display: none;
}

.view.active {
  display: block;
}

.row {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: 0.6rem;
}

pre {
  white-space: pre-wrap;
  word-break: break-word;
  background: #0d2533;
  color: #d7f1ff;
  padding: 0.9rem;
  border-radius: 8px;
  min-height: 180px;
}

@media (max-width: 900px) {
  .topbar {
    flex-direction: column;
    align-items: flex-start;
  }
}