:root {
  --bg-light: #f9f9f9;
  --text-light: #111;
  --bg-dark: #181a1b;
  --text-dark: #e8e8e8;
  --card-light: #ffffff;
  --card-dark: #222426;
  --primary: #0070ba;
  --transition: 0.3s ease;
  font-family: 'Poppins', sans-serif;
}

body {
  background: var(--bg-light);
  color: var(--text-light);
  padding: 40px;
  transition: background var(--transition), color var(--transition);
}

[data-theme='dark'] body {
  background: var(--bg-dark);
  color: var(--text-dark);
}

main {
  max-width: 600px;
  margin: auto;
}

form,
#cabinet {
  background: var(--card-light);
  padding: 20px;
  border-radius: 12px;
  margin-bottom: 30px;
  box-shadow: 0 0 12px rgba(0, 0, 0, 0.06);
  transition: background var(--transition);
}

[data-theme='dark'] form,
[data-theme='dark'] #cabinet {
  background: var(--card-dark);
}

input,
select {
  width: 100%;
  padding: 12px;
  margin-bottom: 15px;
  border: 1px solid #ccc;
  border-radius: 8px;
  font-size: 15px;
  background: #fff;
  transition: background var(--transition), color var(--transition), border var(--transition);
}

[data-theme='dark'] input,
[data-theme='dark'] select {
  background: #2b2e30;
  color: #e8e8e8;
  border: 1px solid #444;
}

button {
  background: var(--primary);
  color: white;
  padding: 12px 18px;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  font-weight: 600;
  transition: background 0.2s;
}

button:hover {
  background: #005c9e;
}

.step {
  display: none;
  animation: fade 0.3s ease-in-out;
}

.step.active {
  display: block;
}

.theme-toggle {
  position: absolute;
  top: 20px;
  right: 20px;
  user-select: none;
}

.theme-toggle label {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
}

/* Toggle switch */
.theme-toggle input[type="checkbox"] {
  appearance: none;
  width: 42px;
  height: 24px;
  background: #ccc;
  border-radius: 20px;
  position: relative;
  transition: background var(--transition);
  cursor: pointer;
}

.theme-toggle input[type="checkbox"]::before {
  content: "";
  position: absolute;
  width: 18px;
  height: 18px;
  left: 3px;
  top: 3px;
  background: #fff;
  border-radius: 50%;
  transition: transform var(--transition);
}

.theme-toggle input[type="checkbox"]:checked {
  background: var(--primary);
}

.theme-toggle input[type="checkbox"]:checked::before {
  transform: translateX(18px);
}

ul#bookingList li {
  background: #f0f0f0;
  padding: 12px;
  border-radius: 8px;
  margin-bottom: 10px;
  transition: background var(--transition);
}

[data-theme='dark'] ul#bookingList li {
  background: #2a2a2a;
}

@keyframes fade {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}