/* Base styles */
:root {
  --primary-color: #4a6da7;
  --primary-dark: #345a96;
  --secondary-color: #f5f5f5;
  --accent-color: #ff9800;
  --danger-color: #f44336;
  --text-color: #333333;
  --text-light: #ffffff;
  --border-color: #dddddd;
  --card-bg: #ffffff;
  --bg-color: #f0f2f5;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
  line-height: 1.6;
  color: var(--text-color);
  background-color: var(--bg-color);
}

a {
  color: var(--primary-color);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

button {
  cursor: pointer;
  padding: 8px 16px;
  background-color: var(--primary-color);
  color: var(--text-light);
  border: none;
  border-radius: 4px;
  font-size: 14px;
  transition: background-color 0.2s;
}

button:hover {
  background-color: var(--primary-dark);
}

.danger-button {
  background-color: var(--danger-color);
}

.danger-button:hover {
  background-color: #d32f2f;
}

/* Layout */
header {
  background-color: var(--primary-color);
  color: var(--text-light);
  padding: 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

header h1 {
  font-size: 1.5rem;
  margin: 0;
}

nav {
  display: flex;
  gap: 10px;
}

main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1.5rem;
}

/* Cards */
.card {
  background-color: var(--card-bg);
  border-radius: 8px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  margin-bottom: 1.5rem;
  overflow: hidden;
}

.card-header {
  padding: 1rem;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.card-header h3 {
  margin: 0;
  font-size: 1.2rem;
}

.card-content {
  padding: 1rem;
}

/* Tabs */
.tab-button {
  background: transparent;
  color: rgba(255, 255, 255, 0.7);
  border: none;
  padding: 8px 16px;
  border-radius: 4px;
}

.tab-button.active {
  background: rgba(255, 255, 255, 0.2);
  color: white;
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

/* Queue */
.queue-list {
  list-style: none;
}

.queue-list li {
  padding: 10px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.queue-list li:last-child {
  border-bottom: none;
}

.queue-list .now-playing {
  background-color: rgba(74, 109, 167, 0.1);
  border-left: 4px solid var(--primary-color);
}

/* Tables */
.data-table {
  width: 100%;
  border-collapse: collapse;
}

.data-table th, .data-table td {
  padding: 10px;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

.data-table th {
  background-color: var(--secondary-color);
  font-weight: 600;
}

/* Forms */
.form-group {
  margin-bottom: 15px;
}

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

.form-group input, .form-group select {
  width: 100%;
  padding: 8px;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  font-size: 16px;
}

.form-actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 20px;
}

/* Modal */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: 1000;
  justify-content: center;
  align-items: center;
}

.modal.active {
  display: flex;
}

.modal-content {
  background-color: var(--card-bg);
  border-radius: 8px;
  width: 90%;
  max-width: 500px;
  padding: 20px;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

.modal-content h3 {
  margin-bottom: 15px;
}

/* Stats */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 20px;
}

.stat-item {
  display: flex;
  flex-direction: column;
}

.stat-label {
  font-size: 14px;
  color: #666;
}

.stat-value {
  font-size: 24px;
  font-weight: 600;
}

/* Progress bar */
.progress-bar {
  width: 100%;
  height: 10px;
  background-color: #e0e0e0;
  border-radius: 5px;
  overflow: hidden;
  margin-top: 10px;
}

.progress-value {
  height: 100%;
  background-color: var(--primary-color);
}

/* Login page */
.login-page {
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
}

.login-container {
  width: 90%;
  max-width: 400px;
}

.login-container h1 {
  text-align: center;
  margin-bottom: 20px;
  color: var(--primary-color);
}

.error {
  background-color: rgba(244, 67, 54, 0.1);
  color: var(--danger-color);
  padding: 10px;
  border-radius: 4px;
  margin-bottom: 15px;
  border-left: 4px solid var(--danger-color);
}

/* Empty states */
.empty-message {
  text-align: center;
  color: #999;
  padding: 20px 0;
}

/* Responsive */
@media (max-width: 768px) {
  header {
    flex-direction: column;
    align-items: flex-start;
  }
  
  nav {
    margin-top: 10px;
    width: 100%;
    overflow-x: auto;
  }
  
  .stats-grid {
    grid-template-columns: 1fr 1fr;
  }
}