:root {
  color-scheme: light dark;
  --bg: #0f172a;
  --panel: #1e293b;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --accent: #3b82f6;
  --danger: #ef4444;
  --border: #334155;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

header {
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--border);
}

header h1 {
  margin: 0;
  font-size: 1.25rem;
}

main {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 2rem 1rem;
}

#entry-screen {
  width: 100%;
  max-width: 360px;
}

#entry-form {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  background: var(--panel);
  padding: 1.5rem;
  border-radius: 0.5rem;
  border: 1px solid var(--border);
}

#entry-form label {
  font-size: 0.85rem;
  color: var(--muted);
}

#entry-form input {
  padding: 0.5rem;
  border-radius: 0.25rem;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font-size: 1rem;
}

#entry-form button {
  margin-top: 0.5rem;
  padding: 0.6rem;
  border: none;
  border-radius: 0.25rem;
  background: var(--accent);
  color: white;
  font-size: 1rem;
  cursor: pointer;
}

#entry-form button:hover {
  opacity: 0.9;
}

.error {
  color: var(--danger);
  margin-top: 0.75rem;
}

#loading-screen {
  text-align: center;
  color: var(--muted);
}

#lab-screen {
  width: 100%;
  max-width: 480px;
  text-align: center;
}

.lab-instructions {
  color: var(--muted);
  margin-bottom: 1.5rem;
}

.lab-links {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.open-button {
  padding: 0.75rem 1rem;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  border-radius: 0.5rem;
  cursor: pointer;
  font-size: 1rem;
}

.open-button:hover {
  border-color: var(--accent);
}

.lab-actions {
  display: flex;
  justify-content: center;
  gap: 0.75rem;
}

.reset-button {
  padding: 0.5rem 1rem;
  border: 1px solid var(--danger);
  background: transparent;
  color: var(--danger);
  border-radius: 0.25rem;
  cursor: pointer;
}

.reset-button:hover {
  background: var(--danger);
  color: white;
}

.end-button {
  padding: 0.5rem 1rem;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--muted);
  border-radius: 0.25rem;
  cursor: pointer;
}

.end-button:hover {
  border-color: var(--text);
  color: var(--text);
}

#reset-message {
  color: var(--muted);
  margin-top: 0.75rem;
}

[hidden] {
  display: none !important;
}