:root {
  color-scheme: dark;
  --bg: #0f172a;
  --panel: #111827;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --accent: #38bdf8;
  --border: #1f2937;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  background: radial-gradient(circle at top, #1e293b 0%, #0f172a 60%);
  color: var(--text);
}

.app {
  max-width: 900px;
  margin: 0 auto;
  padding: 32px 20px 48px;
  display: grid;
  gap: 24px;
}

.app__header h1 {
  margin: 0 0 8px;
  font-size: 2rem;
}

.app__header p {
  margin: 0;
  color: var(--muted);
}

.app__note {
  margin-top: 12px;
  font-size: 1.02rem;
  font-weight: 700;
  color: #ffffff;
  background: #0b1b3a;
  padding: 12px 16px;
  border-radius: 12px;
  display: block;
  width: 100%;
  box-shadow: 0 10px 24px rgba(15, 23, 42, 0.35);
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.terminal {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 20px;
  display: grid;
  gap: 16px;
}

.terminal__output {
  min-height: 280px;
  max-height: 420px;
  overflow-y: auto;
  padding: 16px;
  background: #0b1120;
  border-radius: 12px;
  border: 1px solid var(--border);
  font-family: "Cascadia Mono", "Consolas", monospace;
  font-size: 0.95rem;
  line-height: 1.5;
  white-space: pre-wrap;
}

.terminal__form {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 12px;
  align-items: center;
}

.terminal__prompt {
  font-family: "Cascadia Mono", "Consolas", monospace;
  color: var(--accent);
  font-weight: 600;
}

.terminal__input {
  width: 100%;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: #0b1120;
  color: var(--text);
  font-family: "Cascadia Mono", "Consolas", monospace;
  font-size: 0.95rem;
}

.terminal__button {
  padding: 10px 16px;
  border-radius: 10px;
  border: none;
  background: var(--accent);
  color: #0f172a;
  font-weight: 600;
  cursor: pointer;
}

.help {
  background: rgba(15, 23, 42, 0.7);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 20px;
}

.help h2 {
  margin-top: 0;
}

.help ul {
  margin: 0;
  padding-left: 18px;
  color: var(--muted);
}