:root {
  --primary: #5c6bc0;
  --primary-hover: #3f51b5;
  --bg: #121212;
  --surface: #1e1e1e;
  --surface-hover: #2c2c2c;
  --text: #ffffff;
  --text-secondary: #aaaaaa;
  --border: #333333;
  --accent: #ff4081;
  --success: #00e676;
  --radius: 16px;
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.6;
  padding: 20px;
  -webkit-font-smoothing: antialiased;
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 30px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border);
}

header h1 {
  font-size: 1.8rem;
  font-weight: 700;
  background: linear-gradient(90deg, #fff, #aaa);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

nav a {
  color: var(--primary);
  text-decoration: none;
  font-weight: 500;
  padding: 8px 16px;
  border-radius: 8px;
  transition: all 0.2s;
  background: rgba(92, 107, 192, 0.1);
}

nav a:hover {
  background: rgba(92, 107, 192, 0.2);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
}

/* Room Section */
.room-section {
  margin-bottom: 40px;
  animation: fadeIn 0.4s ease-out;
}

.room-title {
  font-size: 1.4rem;
  margin-bottom: 16px;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* Device Grid */
.device-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
}

/* Device Card */
.device-card {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  transition: transform 0.2s, box-shadow 0.2s;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.device-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.5);
  border-color: var(--primary);
}

.device-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.device-name {
  font-size: 1.2rem;
  font-weight: 600;
}

/* Toggle Switch */
.switch {
  position: relative;
  display: inline-block;
  width: 50px;
  height: 28px;
}

.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.slider {
  position: absolute;
  cursor: pointer;
  top: 0; left: 0; right: 0; bottom: 0;
  background-color: #444;
  transition: .4s;
  border-radius: 34px;
}

.slider:before {
  position: absolute;
  content: "";
  height: 20px;
  width: 20px;
  left: 4px;
  bottom: 4px;
  background-color: white;
  transition: .4s;
  border-radius: 50%;
}

input:checked + .slider {
  background-color: var(--success);
}

input:checked + .slider:before {
  transform: translateX(22px);
}

/* Form Controls */
.control-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.control-label {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.combobox {
  width: 100%;
  padding: 10px;
  border-radius: 8px;
  background: var(--surface-hover);
  color: var(--text);
  border: 1px solid var(--border);
  font-size: 1rem;
  outline: none;
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
  background-repeat: no-repeat;
  background-position: right 10px center;
  background-size: 1em;
}

.range-slider {
  -webkit-appearance: none;
  width: 100%;
  height: 6px;
  border-radius: 4px;
  background: #444;
  outline: none;
}

.range-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--primary);
  cursor: pointer;
  transition: transform 0.1s;
}

.range-slider::-webkit-slider-thumb:hover {
  transform: scale(1.2);
}

/* Button UI */
.btn {
  padding: 10px 20px;
  border-radius: 8px;
  border: none;
  background: var(--primary);
  color: white;
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.2s, transform 0.2s;
}

.btn:hover {
  background: var(--primary-hover);
  transform: translateY(-2px);
}

/* Animations */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Admin Table */
.admin-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 20px;
}

.admin-table th, .admin-table td {
  padding: 12px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

.admin-table th {
  background: var(--surface);
  color: var(--text-secondary);
  font-weight: 500;
}

.admin-input {
  width: 100%;
  padding: 8px;
  border-radius: 4px;
  background: var(--surface-hover);
  border: 1px solid var(--border);
  color: white;
}