/* 1) Reset / global */
:root {
  --text-dark: #111;
  --text-light: #fff;
  --surface: #fff;
  --border: #ccc;
  --hover: #f5f5f5;
  --hover-item: #f0f0f0;
  --focus: #4a90e2;
  --shadow: 0 4px 10px rgba(0, 0, 0, 0.15);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: sans-serif;
  transition:
    background 0.3s,
    color 0.3s;
}

#status {
  text-align: center;
  min-height: 20px;
}

/* 2) Layout */
.theme-switcher {
  position: relative;
  display: inline-block;
}

/* 3) Components */
#theme-switcher-button {
  padding: 0.5rem 1rem;
  font-size: 1rem;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--surface);
  cursor: pointer;
  transition: background 0.15s ease;
}

#theme-switcher-button:hover {
  background: var(--hover);
}

#theme-switcher-button:focus {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
}

#theme-dropdown {
  position: absolute;
  margin-top: 0.5rem;
  background: var(--surface);
  color: var(--text-dark);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.25rem 0;
  min-width: 160px;
  box-shadow: var(--shadow);
}

#theme-dropdown li {
  list-style-type: none;
  cursor: pointer;
  padding: 0.5rem 1rem;
  transition: background 0.15s ease;
}

#theme-dropdown li:hover {
  background-color: var(--hover-item);
}

#theme-dropdown li:focus {
  outline: 2px solid var(--focus);
  outline-offset: -2px;
}

/* 4) Utility / state classes */
.theme-light {
  background: var(--surface);
  color: var(--text-dark);
}

.theme-dark {
  background: var(--text-dark);
  color: var(--text-light);
}

.theme-blue {
  background: darkblue;
  color: var(--text-light);
}

.theme-orange {
  background: orange;
  color: var(--text-dark);
}