:root {
  --font: 'Roboto', sans-serif;
  --bg: #ecf0f1;
  --surface: #ffffff;
  --primary: #2C3E50;
  --accent: #E67E22;
  --text: #333333;
  --text-light: #555555;
}
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
body {
  font-family: var(--font);
  background-color: var(--bg);
  color: var(--text);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}
.header {
  background-color: var(--primary);
  color: var(--surface);
  display: flex;
  align-items: center;
  padding: 1rem 2rem;
}
.logo {
  font-size: 1.5rem;
  font-weight: 700;
}
.container {
  display: flex;
  flex: 1;
  padding: 2rem;
  gap: 2rem;
}
.sidebar {
  width: 250px;
}
.sidebar h2 {
  margin-bottom: 1rem;
  font-weight: 500;
}
.scenario-list {
  list-style: none;
}
.scenario-list li {
  margin-bottom: 0.75rem;
}
.scenario-btn {
  width: 100%;
  background: var(--surface);
  border: 1px solid var(--primary);
  border-radius: 0.5rem;
  padding: 0.5rem 1rem;
  text-align: left;
  cursor: pointer;
  font-weight: 500;
  transition: background 0.3s, color 0.3s;
}
.scenario-btn:hover {
  background: var(--primary);
  color: var(--surface);
}
.scenario-btn.active {
  background: var(--accent) !important;
  color: var(--surface) !important;
  border-color: var(--accent) !important;
  box-shadow: 0 0 0 3px rgba(230,126,34,0.5);
}
.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}
.card {
  background: var(--surface);
  border-radius: 0.5rem;
  padding: 1.5rem;
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
}
.options button {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--text-light);
  border-radius: 0.5rem;
  padding: 0.75rem 1rem;
  margin-top: 0.75rem;
  cursor: pointer;
  transition: background 0.3s, color 0.3s;
}
.options button:hover {
  background: var(--accent);
  color: var(--surface);
}
.btn {
  border: none;
  border-radius: 0.5rem;
  padding: 0.75rem 1.5rem;
  cursor: pointer;
  font-size: 1rem;
  font-weight: 500;
}
.btn.primary {
  background: var(--accent);
  color: var(--surface);
}
.btn.secondary {
  background: var(--primary);
  color: var(--surface);
  margin-top: 1rem;
}
.hidden {
  display: none !important;
}
.results {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.5);
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 1rem;
}
.result-card {
  width: 100%;
  max-width: 400px;
  text-align: center;
}
.footer {
  background: var(--primary);
  color: var(--surface);
  text-align: center;
  padding: 1rem;
}