:root {
  color-scheme: dark;
  --bg: #0d1117;
  --panel: #161b22;
  --panel-border: #30363d;
  --text: #e6edf3;
  --muted: #9ea7b3;
  --accent: #e8b84b;
  --success: #3fb950;
  --error: #f85149;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: radial-gradient(circle at top right, rgba(232, 184, 75, 0.15), transparent 45%), var(--bg);
  color: var(--text);
}

.page {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 20px;
}

.panel {
  width: min(680px, 100%);
  border: 1px solid var(--panel-border);
  background: var(--panel);
  border-radius: 14px;
  padding: 20px;
  display: grid;
  gap: 16px;
}

h1 {
  margin: 0;
  font-size: 1.6rem;
}

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

.mode-tabs {
  display: flex;
  gap: 4px;
  background: #0f141b;
  border: 1px solid var(--panel-border);
  border-radius: 10px;
  padding: 4px;
}

.mode-tab {
  flex: 1;
  background: transparent;
  color: var(--muted);
  border: none;
  border-radius: 7px;
  padding: 8px 12px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 150ms ease, color 150ms ease;
}

.mode-tab.is-active,
.mode-tab[aria-selected="true"] {
  background: var(--accent);
  color: #131313;
}

.pairing-form {
  display: grid;
  gap: 12px;
}

label {
  display: grid;
  gap: 6px;
  font-size: 0.95rem;
}

input,
textarea,
button {
  width: 100%;
  border-radius: 10px;
  border: 1px solid var(--panel-border);
  background: #0f141b;
  color: var(--text);
  padding: 11px 12px;
  font-size: 1rem;
}

textarea {
  resize: vertical;
}

button {
  background: var(--accent);
  color: #131313;
  font-weight: 700;
  cursor: pointer;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.7;
}

.pairing-status {
  margin: 0;
  min-height: 24px;
  color: var(--muted);
}

.pairing-status.success {
  color: var(--success);
}

.pairing-status.error {
  color: var(--error);
}

@media (max-width: 600px) {
  .panel {
    padding: 16px;
  }

  h1 {
    font-size: 1.3rem;
  }
}