:root {
  --bg: #f2f2f2;
  --text: #222;
  --panel: #fff;
  --button: #ddd;
  --button-hover: #ccc;
  --button-text: #000;
}

body.dark {
  --bg: #121212;
  --text: #f8f8f8;
  --panel: #1e1e1e;
  --button: #2e2e2e;
  --button-hover: #3d3d3d;
  --button-text: #fff;
}

body {
  font-family: Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  margin: 0;
  padding: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}

#app {
  text-align: center;
  background: var(--panel);
  padding: 30px;
  border-radius: 12px;
  box-shadow: 0 4px 8px rgba(0,0,0,0.1);
  width: 320px;
}

h1 {
  margin-bottom: 20px;
}

button {
  display: block;
  width: 100%;
  margin: 8px 0;
  padding: 10px;
  background: var(--button);
  border: none;
  border-radius: 6px;
  cursor: pointer;
  color: var(--button-text);
  font-size: 15px;
  transition: background 0.2s;
}

button:hover {
  background: var(--button-hover);
}

.hidden {
  display: none;
}

.save-slot {
  background: var(--panel);
  border: 1px solid var(--button-hover);
  padding: 8px;
  border-radius: 8px;
  margin: 6px 0;
}

label {
  display: flex;
  justify-content: space-between;
  margin: 6px 0;
}