body {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
  background: #fff;
  min-height: 100vh;
  padding: 2rem 0;
}

.card {
  background: rgba(255, 255, 255, 0.9);
  border: none;
  border-radius: 1.5rem;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
  backdrop-filter: blur(10px);
  overflow: hidden;
}

.visualizer {
  width: 100%;
  height: 60px;
  background: linear-gradient(to bottom, #f8f9fa, #ffffff);
  border-radius: 0.75rem;
  margin-bottom: 0.5rem;
  box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.05);
}

.form-control,
.form-select,
.form-range {
  border: 1px solid #dfd0b8;
  border-radius: 0.75rem;
  padding: 0.5rem 1rem;
}

.form-control:focus,
.form-select:focus {
  border-color: #393e46;
  box-shadow: 0 0 0 0.25rem rgba(57, 62, 70, 0.15);
}

.btn {
  border-radius: 0.75rem;
  padding: 0.5rem 1.5rem;
  font-weight: 600;
  transition: all 0.3s ease;
  border: none;
}

.btn-primary {
  background: linear-gradient(135deg, #393e46 0%, #222831 100%);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #222831 0%, #393e46 100%);
  transform: translateY(-2px);
}

.btn-outline-danger {
  background: transparent;
  border: 2px solid #393e46;
  color: #393e46;
}

.btn-outline-danger:hover {
  background: #393e46;
  color: white;
}

.btn-success {
  background: linear-gradient(135deg, #948979 0%, #393e46 100%);
}

.btn-success:hover {
  background: linear-gradient(135deg, #393e46 0%, #948979 100%);
  transform: translateY(-2px);
}

.progress {
  height: 0.75rem;
  border-radius: 0.75rem;
  background-color: #dfd0b8;
}

.progress-bar {
  background: linear-gradient(90deg, #948979 0%, #393e46 100%);
  border-radius: 0.75rem;
}

.form-switch .form-check-input {
  width: 3em;
  height: 1.5em;
  margin-right: 0.5rem;
}

.form-switch .form-check-input:checked {
  background-color: #393e46;
  border-color: #393e46;
}

.blinking {
  animation: blink 1.5s infinite;
}

@keyframes blink {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

.status-indicator {
  display: inline-block;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  margin-right: 8px;
}

.status-danger {
  background-color: #ff4757;
}

.status-success {
  background-color: #2ecc71;
  box-shadow: 0 0 10px #2ecc71;
}

.timer {
  font-family: "Courier New", monospace;
  font-weight: bold;
  color: #393e46;
}

h2 {
  color: #222831;
  font-weight: 700;
  margin-bottom: 1.5rem;
  position: relative;
  display: inline-block;
}

h2::after {
  content: "";
  position: absolute;
  bottom: -8px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, #393e46 0%, #948979 100%);
  border-radius: 3px;
}

.control-group {
  background: rgba(223, 208, 184, 0.2);
  border-radius: 1rem;
  padding: 1.25rem;
  margin-bottom: 1.5rem;
}

.form-range::-webkit-slider-thumb {
  background: #393e46;
}

.form-range::-moz-range-thumb {
  background: #393e46;
}