* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Roboto', sans-serif;
}

body {
  background-color: #f5f5f5;
  color: #333;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px;
}

header {
  text-align: center;
  margin-bottom: 30px;
}

header h1 {
  font-size: 2.5rem;
  color: #3a3a3a;
  margin-bottom: 10px;
}

header p {
  font-size: 1.2rem;
  color: #666;
}

.main-content {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
}

.video-container {
  flex: 1 1 600px;
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.video-container img {
  width: 100%;
  height: auto;
  display: block;
}

.controls {
  flex: 1 1 300px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.controls h2 {
  font-size: 1.5rem;
  margin-bottom: 15px;
  color: #3a3a3a;
  border-bottom: 2px solid #3498db;
  padding-bottom: 5px;
}

.exercise-options {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.exercise-option {
  flex: 1 1 calc(33% - 10px);
  min-width: 80px;
  background-color: white;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  transition:
    transform 0.3s,
    box-shadow 0.3s;
  cursor: pointer;
  text-align: center;
}

.exercise-option:hover {
  transform: translateY(-5px);
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.15);
}

.exercise-option.selected {
  border: 2px solid #3498db;
  transform: translateY(-5px);
}

.exercise-option img {
  width: 100%;
  height: 100px;
  object-fit: cover;
}

.exercise-option h3 {
  padding: 10px;
  font-size: 1rem;
}

.config-inputs {
  display: flex;
  gap: 15px;
}

.input-group {
  flex: 1;
}

.input-group label {
  display: block;
  margin-bottom: 5px;
  font-weight: 500;
}

.input-group input {
  width: 100%;
  padding: 8px 12px;
  border: 1px solid #ddd;
  border-radius: 5px;
  font-size: 1rem;
}

.action-buttons {
  display: flex;
  gap: 10px;
}

.btn {
  flex: 1;
  padding: 12px 20px;
  border: none;
  border-radius: 5px;
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: background-color 0.3s;
}

.primary-btn {
  background-color: #3498db;
  color: white;
}

.primary-btn:hover {
  background-color: #2980b9;
}

.secondary-btn {
  background-color: #e74c3c;
  color: white;
}

.secondary-btn:hover {
  background-color: #c0392b;
}

.btn:disabled {
  background-color: #ccc;
  cursor: not-allowed;
}

.workout-status {
  background-color: white;
  border-radius: 8px;
  padding: 15px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.status-display {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.status-item {
  display: flex;
  justify-content: space-between;
  padding: 5px 0;
  border-bottom: 1px solid #eee;
}

.status-label {
  font-weight: 500;
  color: #555;
}

.status-value {
  font-weight: 700;
  color: #3498db;
}

@media (max-width: 768px) {
  .main-content {
    flex-direction: column;
  }

  .config-inputs {
    flex-direction: column;
  }
}