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

:root {
  --primary: #2c3e50;
  --primary-light: #34495e;
  --primary-dark: #1a252f;
  --accent: #3498db;
  --success: #27ae60;
  --warning: #f39c12;
  --danger: #e74c3c;
  --gray-100: #f8f9fa;
  --gray-200: #e9ecef;
  --gray-300: #dee2e6;
  --gray-400: #ced4da;
  --gray-500: #adb5bd;
  --gray-600: #6c757d;
  --gray-700: #495057;
  --gray-800: #343a40;
  --gray-900: #212529;
  --shadow: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -1px rgba(0,0,0,0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
  --radius: 8px;
  --radius-lg: 12px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: var(--gray-100);
  color: var(--gray-900);
  min-height: 100vh;
  line-height: 1.5;
}

/* Layout */
.app-container {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: 260px;
  background: var(--primary);
  color: white;
  padding: 20px 0;
  position: fixed;
  height: 100vh;
  overflow-y: auto;
  z-index: 100;
}

.sidebar-header {
  padding: 0 20px 20px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
  margin-bottom: 20px;
}

.sidebar-header h1 {
  font-size: 1.25rem;
  display: flex;
  align-items: center;
  gap: 10px;
}

.sidebar-nav {
  list-style: none;
}

.sidebar-nav li {
  margin: 4px 8px;
}

.sidebar-nav a, .sidebar-nav button {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  color: rgba(255,255,255,0.8);
  text-decoration: none;
  border-radius: var(--radius);
  transition: all 0.2s;
  font-size: 14px;
  width: 100%;
  background: none;
  border: none;
  cursor: pointer;
  text-align: left;
}

.sidebar-nav a:hover, .sidebar-nav button:hover {
  background: rgba(255,255,255,0.1);
  color: white;
}

.sidebar-nav a.active {
  background: rgba(255,255,255,0.15);
  color: white;
}

.sidebar-section {
  padding: 10px 20px;
  font-size: 11px;
  text-transform: uppercase;
  color: rgba(255,255,255,0.5);
  letter-spacing: 0.5px;
}

.main-content {
  flex: 1;
  margin-left: 260px;
  padding: 24px;
  min-height: 100vh;
}

/* Cards */
.card {
  background: white;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  padding: 24px;
  margin-bottom: 24px;
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--gray-200);
}

.card-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--gray-800);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  border: none;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  text-decoration: none;
}

.btn-primary {
  background: var(--primary);
  color: white;
}

.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
}

.btn-secondary {
  background: var(--gray-200);
  color: var(--gray-700);
}

.btn-secondary:hover {
  background: var(--gray-300);
}

.btn-success {
  background: var(--success);
  color: white;
}

.btn-success:hover {
  background: #219a52;
}

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

.btn-danger:hover {
  background: #c0392b;
}

.btn-sm {
  padding: 6px 12px;
  font-size: 13px;
}

.btn-lg {
  padding: 14px 28px;
  font-size: 16px;
}

.btn-group {
  display: flex;
  gap: 8px;
}

/* Forms */
.form-group {
  margin-bottom: 16px;
}

.form-label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: var(--gray-700);
  margin-bottom: 6px;
}

.form-input, .form-select, .form-textarea {
  width: 100%;
  padding: 10px 14px;
  border: 2px solid var(--gray-300);
  border-radius: var(--radius);
  font-size: 14px;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(44,62,80,0.1);
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
}

/* Tables */
.table-container {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
}

th, td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--gray-200);
}

th {
  background: var(--gray-100);
  font-weight: 600;
  color: var(--gray-700);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

tr:hover {
  background: var(--gray-100);
}

/* Badges */
.badge {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
}

.badge-success {
  background: #d4edda;
  color: #155724;
}

.badge-warning {
  background: #fff3cd;
  color: #856404;
}

.badge-secondary {
  background: var(--gray-200);
  color: var(--gray-700);
}

.badge-primary {
  background: #cce5ff;
  color: #004085;
}

.badge-tour {
  background: var(--primary);
  color: white;
}

.badge-ibiza {
  background: var(--gray-500);
  color: white;
}

/* Stats Grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
  margin-bottom: 24px;
}

.stat-card {
  background: white;
  border-radius: var(--radius-lg);
  padding: 20px;
  box-shadow: var(--shadow);
  text-align: center;
}

.stat-value {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--primary);
  line-height: 1;
}

.stat-label {
  font-size: 14px;
  color: var(--gray-600);
  margin-top: 8px;
}

.stat-card.success .stat-value {
  color: var(--success);
}

.stat-card.warning .stat-value {
  color: var(--warning);
}

/* Artist Cards */
.artist-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}

.artist-card {
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: white;
  padding: 40px 24px;
  border-radius: var(--radius-lg);
  text-align: center;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
}

.artist-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.artist-card h3 {
  font-size: 1.5rem;
  margin-bottom: 12px;
}

.artist-card-stats {
  font-size: 14px;
  opacity: 0.9;
}

/* Filter Section */
.filter-section {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  align-items: flex-end;
  margin-bottom: 20px;
  padding: 16px;
  background: var(--gray-100);
  border-radius: var(--radius);
}

.filter-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.filter-group label {
  font-size: 12px;
  font-weight: 600;
  color: var(--gray-600);
}

.filter-group select, .filter-group input {
  padding: 8px 12px;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius);
  font-size: 14px;
  min-width: 150px;
}

/* Upload Section */
.upload-zone {
  border: 2px dashed var(--gray-300);
  border-radius: var(--radius-lg);
  padding: 60px;
  text-align: center;
  transition: all 0.2s;
  background: var(--gray-100);
}

.upload-zone.dragover {
  border-color: var(--primary);
  background: rgba(44,62,80,0.05);
}

.upload-zone-icon {
  font-size: 48px;
  margin-bottom: 16px;
}

.upload-zone h3 {
  margin-bottom: 8px;
  color: var(--gray-700);
}

.upload-zone p {
  color: var(--gray-500);
  margin-bottom: 20px;
}

/* Modal */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0,0,0,0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 20px;
}

.modal {
  background: white;
  border-radius: var(--radius-lg);
  max-width: 600px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 24px;
  border-bottom: 1px solid var(--gray-200);
}

.modal-header h2 {
  font-size: 1.25rem;
}

.modal-close {
  background: none;
  border: none;
  font-size: 24px;
  cursor: pointer;
  color: var(--gray-500);
  padding: 0;
  line-height: 1;
}

.modal-body {
  padding: 24px;
}

.modal-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--gray-200);
  display: flex;
  justify-content: flex-end;
  gap: 12px;
}

/* Login Page */
.login-container {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #0a1628;
  padding: 20px;
}

.login-card {
  background: #111a2e;
  border-radius: var(--radius-lg);
  padding: 40px;
  width: 100%;
  max-width: 400px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
  border: 1px solid rgba(0, 212, 255, 0.1);
}

.login-card h1 {
  text-align: center;
  margin-bottom: 8px;
  font-size: 1.75rem;
  color: #ffffff;
}

.login-card p {
  text-align: center;
  color: #8899aa;
  margin-bottom: 32px;
}

.login-card .form-group {
  margin-bottom: 20px;
}

.login-card .form-label {
  color: #aabbcc;
}

.login-card .form-input {
  background: #0a1628;
  border-color: rgba(0, 212, 255, 0.2);
  color: #ffffff;
}

.login-card .form-input:focus {
  border-color: #00d4ff;
  box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.15);
}

.login-card .btn-primary {
  width: 100%;
  padding: 14px;
  background: linear-gradient(135deg, #00d4ff, #007ab8);
  border: none;
}

.login-card .btn-primary:hover {
  background: linear-gradient(135deg, #00e0ff, #0090cc);
}

.login-error {
  background: rgba(248, 215, 218, 0.1);
  color: #ff6b7a;
  padding: 12px;
  border-radius: var(--radius);
  margin-bottom: 20px;
  font-size: 14px;
  border: 1px solid rgba(255, 107, 122, 0.2);
}

/* Alerts */
.alert {
  padding: 16px;
  border-radius: var(--radius);
  margin-bottom: 20px;
  font-size: 14px;
}

.alert-success {
  background: #d4edda;
  color: #155724;
  border: 1px solid #c3e6cb;
}

.alert-error {
  background: #f8d7da;
  color: #721c24;
  border: 1px solid #f5c6cb;
}

.alert-warning {
  background: #fff3cd;
  color: #856404;
  border: 1px solid #ffeeba;
}

.alert-info {
  background: #d1ecf1;
  color: #0c5460;
  border: 1px solid #bee5eb;
}

/* Loading */
.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px;
}

.spinner {
  width: 40px;
  height: 40px;
  border: 4px solid var(--gray-200);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Empty State */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--gray-500);
}

.empty-state-icon {
  font-size: 64px;
  margin-bottom: 16px;
}

.empty-state h3 {
  color: var(--gray-700);
  margin-bottom: 8px;
}

/* Progress Bar */
.progress {
  height: 8px;
  background: var(--gray-200);
  border-radius: 4px;
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  background: var(--success);
  border-radius: 4px;
  transition: width 0.3s;
}

.progress-bar.warning {
  background: var(--warning);
}

/* Track List */
.track-list {
  max-height: 400px;
  overflow-y: auto;
}

.track-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px;
  border-bottom: 1px solid var(--gray-200);
}

.track-item:last-child {
  border-bottom: none;
}

.track-number {
  width: 32px;
  height: 32px;
  background: var(--gray-200);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 13px;
  color: var(--gray-600);
  flex-shrink: 0;
}

.track-info {
  flex: 1;
  min-width: 0;
}

.track-name {
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.track-meta {
  font-size: 13px;
  color: var(--gray-500);
}

/* User Avatar */
.user-info {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 20px;
  border-top: 1px solid rgba(255,255,255,0.1);
  margin-top: auto;
}

.user-avatar {
  width: 40px;
  height: 40px;
  background: rgba(255,255,255,0.2);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
}

.user-details {
  flex: 1;
}

.user-name {
  font-weight: 600;
  font-size: 14px;
}

.user-role {
  font-size: 12px;
  opacity: 0.7;
  text-transform: capitalize;
}

/* Responsive */
@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
    transition: transform 0.3s;
  }
  
  .sidebar.open {
    transform: translateX(0);
  }
  
  .main-content {
    margin-left: 0;
  }
  
  .mobile-menu-btn {
    display: block;
    position: fixed;
    top: 16px;
    left: 16px;
    z-index: 101;
    background: var(--primary);
    color: white;
    border: none;
    padding: 10px 14px;
    border-radius: var(--radius);
    cursor: pointer;
  }
  
  .filter-section {
    flex-direction: column;
    align-items: stretch;
  }
  
  .btn-group {
    flex-direction: column;
  }
}

/* Utility Classes */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-muted { color: var(--gray-500); }
.text-success { color: var(--success); }
.text-warning { color: var(--warning); }
.text-danger { color: var(--danger); }
.mb-0 { margin-bottom: 0; }
.mb-2 { margin-bottom: 8px; }
.mb-4 { margin-bottom: 16px; }
.mt-4 { margin-top: 16px; }
.flex { display: flex; }
.flex-between { display: flex; justify-content: space-between; align-items: center; }
.gap-2 { gap: 8px; }
.gap-4 { gap: 16px; }

.artist-card-actions {
  display: flex;
  gap: 8px;
  margin-top: 15px;
  justify-content: center;
}

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

.btn-danger:hover {
  background: #c0392b;
}

.btn-sm {
  padding: 6px 12px;
  font-size: 12px;
}

.modal-large {
  max-width: 700px;
}

.effects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-bottom: 20px;
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  padding: 8px 12px;
  background: #f5f5f5;
  border-radius: 6px;
}

.checkbox-label:hover {
  background: #e8e8e8;
}

.modal-body h4 {
  margin-top: 20px;
  margin-bottom: 10px;
  color: #333;
  border-bottom: 1px solid #eee;
  padding-bottom: 5px;
}

.modal-body h4:first-child {
  margin-top: 0;
}

.modal-large {
  max-width: 700px;
}

.osc-input {
  font-family: monospace;
  background: #f8f9fa;
}

.osc-code {
  font-size: 11px;
  background: #f0f0f0;
  padding: 2px 6px;
  border-radius: 3px;
}

.modal-body h4 {
  margin-top: 20px;
  margin-bottom: 10px;
  color: #333;
  border-bottom: 1px solid #eee;
  padding-bottom: 5px;
}

.modal-body h4:first-child {
  margin-top: 0;
}

.text-muted {
  color: #888;
  font-size: 12px;
}

.form-help {
  display: block;
  margin-top: 4px;
  font-size: 11px;
  color: #888;
}

/* Upload Zone */
.upload-zone {
  border: 2px dashed #ddd;
  border-radius: 12px;
  padding: 60px 40px;
  text-align: center;
  background: #fafafa;
  transition: all 0.3s ease;
}

.upload-zone:hover {
  border-color: #667eea;
  background: #f0f4ff;
}

.upload-icon {
  font-size: 48px;
  margin-bottom: 16px;
}

/* Track Preview */
.track-preview {
  margin-top: 20px;
  max-height: 400px;
  overflow-y: auto;
  border: 1px solid #e0e0e0;
  border-radius: 8px;
}

.track-preview h4 {
  padding: 12px 16px;
  background: #f5f5f5;
  margin: 0;
  border-bottom: 1px solid #e0e0e0;
  position: sticky;
  top: 0;
}

.track-list {
  padding: 8px;
}

.track-item {
  display: flex;
  align-items: center;
  padding: 8px 12px;
  border-bottom: 1px solid #f0f0f0;
}

.track-item:last-child {
  border-bottom: none;
}

.track-number {
  width: 40px;
  font-weight: bold;
  color: #667eea;
}

.track-name {
  flex: 1;
}

/* Radio Group */
.radio-group {
  display: flex;
  gap: 24px;
}

.radio-group label {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
}

/* Form Actions */
.form-actions {
  margin-top: 24px;
  padding-top: 16px;
  border-top: 1px solid #e0e0e0;
}