:root {
  --primary: #0066cc;
  --accent: #e0f0ff;
  --text: #222;
  --bg: #f9f9f9;
  --border-radius: 0.5rem;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: "Segoe UI", sans-serif;
}

body {
  background-color: var(--bg);
  color: var(--text);
  padding: 1rem;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
}

.container {
  width: 100%;
  max-width: 600px;
  background-color: white;
  padding: 2rem;
  border-radius: var(--border-radius);
  box-shadow: 0 0 20px rgba(0, 0, 0, 0.05);
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

h1, h2 {
  color: var(--primary);
}

#current-activity {
  font-size: 1.2rem;
  padding: 1rem;
  background-color: var(--accent);
  border-radius: var(--border-radius);
  margin-top: 0.5rem;
}

#activity-list {
  list-style-type: none;
  margin-top: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

#activity-list li {
  padding: 0.6rem 1rem;
  background-color: #f0f0f0;
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: background 0.2s;
}

#activity-list li:hover {
  background-color: #dceeff;
}

input[type="text"] {
  width: 100%;
  padding: 0.6rem;
  font-size: 1rem;
  margin-top: 0.5rem;
  border: 1px solid #ccc;
  border-radius: var(--border-radius);
}

button {
  margin-top: 0.5rem;
  padding: 0.6rem 1.2rem;
  font-size: 1rem;
  background-color: var(--primary);
  color: white;
  border: none;
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: background 0.3s ease;
}

button:hover {
  background-color: #004a99;
}

footer {
  text-align: center;
  font-size: 0.9rem;
  color: #666;
  margin-top: 2rem;
}

#activity-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.activity-option {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.6rem 1rem;
  background-color: #f0f0f0;
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: background 0.2s;
}

.activity-option:hover {
  background-color: #e6f2ff;
}

.activity-option input[type="radio"] {
  accent-color: var(--primary);
  width: 1.2rem;
  height: 1.2rem;
}