/* Global Styles */
:root[data-theme="light"] {
  --bg-primary: #f5f5f5;
  --bg-secondary: #ffffff;
  --bg-tertiary: #ecf0f1;
  --text-primary: #2c3e50;
  --text-secondary: #34495e;
  --text-muted: #7f8c8d;
  --border-color: #bdc3c7;
  --accent-color: #3498db;
  --accent-hover: #2980b9;
  --success-color: #27ae60;
  --error-color: #e74c3c;
  --warning-color: #f39c12;
  --shadow: rgba(0, 0, 0, 0.1);
}

:root[data-theme="dark"] {
  --bg-primary: #1a1a1a;
  --bg-secondary: #2d2d2d;
  --bg-tertiary: #3a3a3a;
  --text-primary: #e0e0e0;
  --text-secondary: #b0b0b0;
  --text-muted: #808080;
  --border-color: #4a4a4a;
  --accent-color: #3498db;
  --accent-hover: #2980b9;
  --success-color: #27ae60;
  --error-color: #e74c3c;
  --warning-color: #f39c12;
  --shadow: rgba(0, 0, 0, 0.3);
}

:root[data-theme="blue"] {
  --bg-primary: #e3f2fd;
  --bg-secondary: #ffffff;
  --bg-tertiary: #bbdefb;
  --text-primary: #0d47a1;
  --text-secondary: #1565c0;
  --text-muted: #64b5f6;
  --border-color: #90caf9;
  --accent-color: #2196f3;
  --accent-hover: #1976d2;
  --success-color: #4caf50;
  --error-color: #f44336;
  --warning-color: #ff9800;
  --shadow: rgba(33, 150, 243, 0.1);
}

:root[data-theme="green"] {
  --bg-primary: #e8f5e9;
  --bg-secondary: #ffffff;
  --bg-tertiary: #c8e6c9;
  --text-primary: #1b5e20;
  --text-secondary: #2e7d32;
  --text-muted: #66bb6a;
  --border-color: #81c784;
  --accent-color: #4caf50;
  --accent-hover: #388e3c;
  --success-color: #66bb6a;
  --error-color: #f44336;
  --warning-color: #ff9800;
  --shadow: rgba(76, 175, 80, 0.1);
}

:root[data-theme="purple"] {
  --bg-primary: #f3e5f5;
  --bg-secondary: #ffffff;
  --bg-tertiary: #e1bee7;
  --text-primary: #4a148c;
  --text-secondary: #6a1b9a;
  --text-muted: #ab47bc;
  --border-color: #ba68c8;
  --accent-color: #9c27b0;
  --accent-hover: #7b1fa2;
  --success-color: #4caf50;
  --error-color: #f44336;
  --warning-color: #ff9800;
  --shadow: rgba(156, 39, 176, 0.1);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  transition: background-color 0.3s ease, color 0.3s ease;
}

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

/* Toast Notifications */
.toast {
  position: fixed;
  top: 20px;
  right: 20px;
  background: var(--bg-secondary);
  color: var(--text-primary);
  padding: 15px 25px;
  border-radius: 8px;
  box-shadow: 0 4px 12px var(--shadow);
  z-index: 10000;
  opacity: 0;
  transform: translateX(400px);
  transition: all 0.3s ease;
  max-width: 400px;
  word-wrap: break-word;
  border-left: 4px solid var(--accent-color);
}

.toast.show {
  opacity: 1;
  transform: translateX(0);
}

.toast-success {
  border-left-color: var(--success-color);
}

.toast-error {
  border-left-color: var(--error-color);
}

.toast-warning {
  border-left-color: var(--warning-color);
}

.toast-info {
  border-left-color: var(--accent-color);
}

/* Loading Overlay */
#loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.7);
  display: none;
  justify-content: center;
  align-items: center;
  z-index: 9999;
}

.loading-spinner {
  text-align: center;
  color: white;
}

.spinner {
  border: 4px solid rgba(255, 255, 255, 0.3);
  border-top: 4px solid white;
  border-radius: 50%;
  width: 50px;
  height: 50px;
  animation: spin 1s linear infinite;
  margin: 0 auto 20px;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

.loading-text {
  font-size: 18px;
  margin-top: 10px;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 12px 24px;
  border: none;
  border-radius: 6px;
  font-size: 16px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s ease;
  text-decoration: none;
  text-align: center;
}

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

.btn-primary:hover {
  background-color: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px var(--shadow);
}

.btn-secondary {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
}

.btn-secondary:hover {
  background-color: var(--border-color);
}

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

.btn-success:hover {
  background-color: #229954;
}

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

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

.btn-outline {
  background-color: transparent;
  border: 2px solid var(--accent-color);
  color: var(--accent-color);
}

.btn-outline:hover {
  background-color: var(--accent-color);
  color: white;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none !important;
}

.btn-block {
  width: 100%;
  display: block;
}

.btn-sm {
  padding: 8px 16px;
  font-size: 14px;
}

.btn-lg {
  padding: 16px 32px;
  font-size: 18px;
}

/* Forms */
.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  margin-bottom: 8px;
  font-weight: 500;
  color: var(--text-secondary);
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 12px;
  border: 2px solid var(--border-color);
  border-radius: 6px;
  font-size: 16px;
  font-family: inherit;
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  transition: all 0.3s ease;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--accent-color);
  box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

.form-textarea {
  resize: vertical;
  min-height: 100px;
}

.form-error {
  color: var(--error-color);
  font-size: 14px;
  margin-top: 5px;
}

.form-help {
  color: var(--text-muted);
  font-size: 14px;
  margin-top: 5px;
}

/* Cards */
.card {
  background-color: var(--bg-secondary);
  border-radius: 10px;
  padding: 30px;
  box-shadow: 0 2px 10px var(--shadow);
  margin-bottom: 20px;
}

.card-header {
  margin-bottom: 20px;
  padding-bottom: 15px;
  border-bottom: 2px solid var(--border-color);
}

.card-title {
  font-size: 24px;
  font-weight: 600;
  color: var(--text-primary);
}

.card-body {
  padding: 20px 0;
}

.card-footer {
  margin-top: 20px;
  padding-top: 15px;
  border-top: 2px solid var(--border-color);
}

/* Modal */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.7);
  display: none;
  justify-content: center;
  align-items: center;
  z-index: 9998;
}

.modal-overlay.active {
  display: flex;
}

.modal {
  background: var(--bg-secondary);
  border-radius: 12px;
  max-width: 600px;
  width: 90%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 10px 40px var(--shadow);
  animation: modalSlideIn 0.3s ease;
}

@keyframes modalSlideIn {
  from {
    opacity: 0;
    transform: translateY(-50px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.modal-header {
  padding: 20px;
  border-bottom: 2px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-title {
  font-size: 20px;
  font-weight: 600;
  color: var(--text-primary);
}

.modal-close {
  background: none;
  border: none;
  font-size: 28px;
  cursor: pointer;
  color: var(--text-muted);
  padding: 0;
  width: 30px;
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 4px;
  transition: all 0.3s ease;
}

.modal-close:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.modal-body {
  padding: 20px;
}

.modal-footer {
  padding: 20px;
  border-top: 2px solid var(--border-color);
  display: flex;
  justify-content: flex-end;
  gap: 10px;
}

/* Theme Selector */
.theme-selector {
  display: flex;
  gap: 10px;
  align-items: center;
}

.theme-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 3px solid transparent;
  cursor: pointer;
  transition: all 0.3s ease;
  position: relative;
}

.theme-btn:hover {
  transform: scale(1.1);
  box-shadow: 0 4px 12px var(--shadow);
}

.theme-btn.active {
  border-color: var(--accent-color);
  box-shadow: 0 0 0 4px rgba(52, 152, 219, 0.2);
}

.theme-btn[data-theme="light"] {
  background: linear-gradient(135deg, #f5f5f5, #e0e0e0);
}

.theme-btn[data-theme="dark"] {
  background: linear-gradient(135deg, #2d2d2d, #1a1a1a);
}

.theme-btn[data-theme="blue"] {
  background: linear-gradient(135deg, #2196f3, #1976d2);
}

.theme-btn[data-theme="green"] {
  background: linear-gradient(135deg, #4caf50, #388e3c);
}

.theme-btn[data-theme="purple"] {
  background: linear-gradient(135deg, #9c27b0, #7b1fa2);
}

/* Responsive */
@media (max-width: 768px) {
  .container {
    padding: 15px;
  }
  
  .card {
    padding: 20px;
  }
  
  .btn {
    padding: 10px 20px;
    font-size: 14px;
  }
  
  .modal {
    width: 95%;
  }
  
  .toast {
    right: 10px;
    left: 10px;
    max-width: none;
  }
}

/* Utility Classes */
.text-center {
  text-align: center;
}

.text-right {
  text-align: right;
}

.text-left {
  text-align: left;
}

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: 10px; }
.mt-2 { margin-top: 20px; }
.mt-3 { margin-top: 30px; }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 10px; }
.mb-2 { margin-bottom: 20px; }
.mb-3 { margin-bottom: 30px; }

.p-0 { padding: 0; }
.p-1 { padding: 10px; }
.p-2 { padding: 20px; }
.p-3 { padding: 30px; }

.d-flex {
  display: flex;
}

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

.align-center {
  align-items: center;
}

.justify-between {
  justify-content: space-between;
}

.justify-center {
  justify-content: center;
}

.gap-1 {
  gap: 10px;
}

.gap-2 {
  gap: 20px;
}

.hidden {
  display: none !important;
}