:root {
  --accent: #2563eb;
  --border: #e2e8f0;
  --text: #1e293b;
  --text-muted: #64748b;
  --bg-card: #f8fafc;
  --bg-card-hover: #f1f5f9;
  --danger: #dc2626;
}

* {
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  margin: 0;
  padding: 14px;
  font-size: 13px;
  color: var(--text);
}

#signIn,
#retry {
  display: block;
  width: 100%;
  margin-bottom: 10px;
  padding: 8px 12px;
  font-size: 13px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: white;
  cursor: pointer;
  transition: background-color 0.15s ease, border-color 0.15s ease;
}

#signIn:hover,
#retry:hover {
  background: var(--bg-card-hover);
  border-color: var(--accent);
}

#addJoint {
  display: block;
  width: 100%;
  margin-bottom: 12px;
  padding: 7px 10px;
  font-size: 13px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: white;
  color: var(--text);
  cursor: pointer;
}

.empty-state {
  color: var(--text-muted);
  font-style: italic;
}

.mate-card {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
  margin-bottom: 10px;
  background: var(--bg-card);
  transition: border-color 0.15s ease;
}

.mate-card:hover {
  border-color: var(--accent);
}

.mate-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}

.mate-title {
  font-weight: 600;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.remove-button {
  border: none;
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 13px;
  line-height: 1;
  padding: 2px 6px;
  border-radius: 4px;
  transition: color 0.15s ease, background-color 0.15s ease;
}

.remove-button:hover {
  color: var(--danger);
  background: rgba(220, 38, 38, 0.08);
}

.mate-track {
  display: flex;
  align-items: center;
  gap: 8px;
}

.mate-limit {
  color: var(--text-muted);
  font-size: 11px;
  min-width: 2.5em;
  text-align: center;
}

.mate-track input[type="range"] {
  flex: 1;
  accent-color: var(--accent);
}

.mate-number {
  width: 3.6em;
  flex: none;
  padding: 4px 6px;
  font-size: 13px;
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
}

.mate-number:focus {
  outline: none;
  border-color: var(--accent);
}

.mate-status {
  display: block;
  min-height: 1.2em;
  margin-top: 4px;
  font-size: 11px;
  color: var(--danger);
}