:root {
  --bg: #0f1419;
  --surface: #1a2332;
  --border: #2d3a4d;
  --text: #e6edf3;
  --text-muted: #8b949e;
  --primary: #3b82f6;
  --primary-hover: #2563eb;
  --success: #22c55e;
  --error: #ef4444;
}

* {
  box-sizing: border-box;
}

body {
  font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  margin: 0;
  min-height: 100vh;
  line-height: 1.5;
}

#app {
  max-width: 560px;
  margin: 0 auto;
  padding: 2rem 1rem;
}

.header {
  margin-bottom: 2rem;
}

.header h1 {
  font-size: 1.75rem;
  font-weight: 600;
  margin: 0 0 0.25rem 0;
}

.subtitle {
  color: var(--text-muted);
  margin: 0 0 1rem 0;
  font-size: 0.95rem;
}

#login-error.error {
  color: var(--error);
  margin: 0.5rem 0 1rem 0;
  font-size: 0.9rem;
}

.header .btn-ghost {
  position: absolute;
  top: 1rem;
  right: 1rem;
}

#login-section {
  text-align: center;
  padding: 3rem 1rem;
}

#login-section p {
  margin-bottom: 1.5rem;
  color: var(--text-muted);
}

.btn {
  display: inline-block;
  padding: 0.6rem 1.2rem;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 500;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: background 0.15s;
}

.btn-primary {
  background: var(--primary);
  color: white;
}

.btn-primary:hover {
  background: var(--primary-hover);
}

.btn-primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.btn-ghost {
  background: transparent;
  color: var(--text-muted);
}

.btn-ghost:hover {
  color: var(--text);
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}

.card h2 {
  font-size: 1.15rem;
  margin: 0 0 1rem 0;
}

.field {
  margin-bottom: 1rem;
}

.field label {
  display: block;
  font-weight: 500;
  margin-bottom: 0.35rem;
  font-size: 0.9rem;
}

.field input[type="date"],
.field input[type="email"],
.field input[type="text"] {
  width: 100%;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg);
  color: var(--text);
  font-size: 1rem;
}

.checkbox-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.5rem;
}

.checkbox {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: normal;
  cursor: pointer;
}

.hint {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 0.35rem;
}

#run-btn {
  margin-top: 0.5rem;
}

.result {
  font-size: 0.95rem;
}

.result.success {
  border-color: var(--success);
}

.result.error {
  border-color: var(--error);
}

.result pre {
  margin: 0.5rem 0 0 0;
  padding: 0.75rem;
  background: var(--bg);
  border-radius: 6px;
  overflow: auto;
  font-size: 0.85rem;
}