/* Component Library Styles */

/* 
 * COMPONENT STANDARDS
 * ------------------
 * Spacing: Use CSS variables (--space-*) consistently
 * - Container padding: var(--space-lg) or var(--space-md)
 * - Item spacing: var(--space-md) between related items
 * - Icon spacing: var(--space-xs) between icons and text
 * 
 * Shadows:
 * - Card/elevated components: var(--shadow-md)
 * - Hover states: var(--shadow-lg)
 * - Small elements (badges, buttons): var(--shadow-sm)
 *
 * Border radius:
 * - Containers/cards: var(--radius-lg)
 * - Buttons: var(--radius-md)
 * - Small elements: var(--radius-sm)
 * - Pill shapes: var(--radius-full)
 */

/* Status Badge Component - Moved to status-badges.css for modularity */

/* Button Components */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  border-radius: var(--radius-md);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-normal);
  text-decoration: none;
  border: none;
  position: relative;
  overflow: hidden;
  font-size: 0.9rem;
  letter-spacing: 0.3px;
  white-space: nowrap;
  line-height: 1.4;
  height: auto;
  min-height: 44px;
}

/* Button hover effect */
.btn::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(255, 255, 255, 0.1);
  transform: translateX(-100%);
  transition: transform var(--transition-normal);
}

.btn:hover::before {
  transform: translateX(0);
}

/* Button icon styles */
.btn i {
  margin-right: var(--space-xs);
  transition: transform var(--transition-fast);
}

.btn:hover i {
  transform: translateX(-2px);
}

/* Button variants - using CSS custom properties for DRY code */
.btn-primary {
  --btn-bg: var(--primary);
  --btn-bg-end: var(--primary-dark);
  --btn-color: var(--text-inverted);
  --btn-shadow-color: rgba(37, 99, 235, 0.15);
  
  background: linear-gradient(135deg, var(--btn-bg), var(--btn-bg-end));
  color: var(--btn-color);
  box-shadow: 0 4px 6px var(--btn-shadow-color), 0 2px 4px rgba(37, 99, 235, 0.1);
}

.btn-secondary {
  --btn-bg: var(--secondary);
  --btn-bg-end: var(--secondary-dark);
  --btn-color: var(--text-inverted);
  --btn-shadow-color: rgba(14, 165, 233, 0.15);
  
  background: linear-gradient(135deg, var(--btn-bg), var(--btn-bg-end));
  color: var(--btn-color);
  box-shadow: 0 4px 6px var(--btn-shadow-color), 0 2px 4px rgba(14, 165, 233, 0.1);
}

.btn-accent {
  --btn-bg: var(--accent);
  --btn-bg-end: var(--accent-dark);
  --btn-color: var(--text-inverted);
  --btn-shadow-color: rgba(244, 63, 94, 0.15);
  
  background: linear-gradient(135deg, var(--btn-bg), var(--btn-bg-end));
  color: var(--btn-color);
  box-shadow: 0 4px 6px var(--btn-shadow-color), 0 2px 4px rgba(244, 63, 94, 0.1);
}

/* Common hover styles for colored buttons */
.btn-primary:hover, .btn-primary:focus,
.btn-secondary:hover, .btn-secondary:focus,
.btn-accent:hover, .btn-accent:focus {
  color: var(--btn-color);
  box-shadow: 0 6px 10px var(--btn-shadow-color), 0 3px 6px var(--btn-shadow-color);
  transform: translateY(-1px);
}

.btn-primary:active,
.btn-secondary:active,
.btn-accent:active {
  transform: translateY(1px);
  box-shadow: 0 2px 4px var(--btn-shadow-color);
}

/* Outline buttons */
.btn-outline {
  background-color: transparent;
  color: var(--primary);
  border: 2px solid var(--primary-light);
  box-shadow: 0 2px 4px rgba(37, 99, 235, 0.05);
}

.btn-outline:hover, .btn-outline:focus {
  background-color: var(--primary-light);
  border-color: var(--primary);
  box-shadow: 0 4px 6px rgba(37, 99, 235, 0.1);
  transform: translateY(-1px);
}

.btn-outline:active {
  transform: translateY(1px);
  box-shadow: 0 2px 4px rgba(37, 99, 235, 0.05);
}


/* Button sizes */
.btn-sm {
  padding: 8px 16px;
  font-size: 0.8rem;
  border-radius: var(--radius-sm);
  min-height: 36px;
}

.btn-lg {
  padding: 16px 32px;
  font-size: 1rem;
  border-radius: var(--radius-lg);
  min-height: 52px;
}



/* Form Components */
.form-container {
  max-width: 600px;
  margin: 0 auto;
  padding: var(--space-lg);
}

.form-group {
  margin-bottom: var(--space-lg);
}

.form-group.inline {
  display: flex;
  gap: var(--space-md);
  align-items: flex-start;
}

.form-group.inline > * {
  flex: 1;
}

.form-label {
  display: block;
  margin-bottom: var(--space-xs);
  font-weight: 500;
  color: var(--text-primary);
}

.form-label.required::after {
  content: " *";
  color: var(--error);
}

/* Required asterisk in span */
.form-label .required {
  color: var(--error);
  font-weight: normal;
  margin-left: 2px;
}

/* Form inputs */
.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 12px;
  border: 1px solid var(--divider);
  border-radius: var(--radius-sm);
  font-size: 16px;
  transition: all var(--transition-fast);
  background-color: white;
  font-family: var(--font-sans);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  border-color: var(--primary);
  outline: none;
  box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.2);
}

.form-input.error,
.form-select.error,
.form-textarea.error {
  border-color: var(--error);
}

.form-input:disabled,
.form-select:disabled,
.form-textarea:disabled {
  background-color: var(--background-alt);
  cursor: not-allowed;
  opacity: 0.6;
}

/* Select styling */
.form-select {
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
  padding-right: 40px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%23666' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 8px center;
  background-size: 16px;
  cursor: pointer;
}

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

/* Checkboxes and Radio buttons */
.form-checkbox,
.form-radio {
  display: flex;
  align-items: center;
  margin-bottom: var(--space-sm);
  cursor: pointer;
}

.form-checkbox input[type="checkbox"],
.form-radio input[type="radio"] {
  margin-right: var(--space-xs);
  cursor: pointer;
}

/* Error messages */
.error-message {
  color: var(--error);
  font-size: 0.875rem;
  margin-top: var(--space-xs);
  display: none;
}

.form-group.has-error .error-message {
  display: block;
}

.has-error .form-input,
.has-error .form-select,
.has-error .form-textarea {
  border-color: var(--error);
}

/* Form buttons */
.form-buttons {
  display: flex;
  gap: var(--space-md);
  margin-top: var(--space-xl);
}

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

.form-buttons.right {
  justify-content: flex-end;
}

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

/* Card Component - Modern Redesign */
.card {
  background: var(--card-background);
  border-radius: 16px;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
  margin-bottom: var(--space-lg);
  padding: 0;
  transition: all var(--transition-normal) var(--transition-smooth);
  border: 1px solid #e5e7eb;
  overflow: visible;
  position: relative;
  text-decoration: none;
  display: block;
  color: inherit;
}

/* Glass morphism variant */
.card.glass {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
}

/* Gradient accent bar */
.card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-normal) var(--transition-smooth);
}

.card:hover::before {
  transform: scaleX(1);
}

/* Enhanced hover state */
.card:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
  border-color: rgba(0, 0, 0, 0.12);
}

.card:active {
  transform: translateY(0);
  transition-duration: 100ms;
}

/* Card inner wrapper for proper padding */
.card-inner {
  padding: var(--space-lg);
}

/* Card variants */
.card-elevated {
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
}

.card-flat {
  box-shadow: none;
  border: 1px solid var(--divider);
}

.card-gradient {
  background: linear-gradient(135deg, #ffffff 0%, #f8f9ff 100%);
}

/* Clickable card specific styles */
.card-clickable {
  position: relative;
  cursor: pointer;
}

.card-clickable::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, transparent 0%, rgba(37, 99, 235, 0.03) 100%);
  opacity: 0;
  transition: opacity var(--transition-normal);
  pointer-events: none;
}

.card-clickable:hover::after {
  opacity: 1;
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: var(--space-md);
  position: relative;
  padding: var(--space-lg) var(--space-lg) 0;
}

.card-title {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-primary);
  position: relative;
  display: inline-flex;
  align-items: baseline;
  letter-spacing: -0.02em;
  line-height: 1.4;
}

.card-subtitle {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-md);
  line-height: 1.6;
  padding: 0 var(--space-lg);
  letter-spacing: -0.01em;
}

.card-content {
  padding: var(--space-md) var(--space-lg) var(--space-lg);
}

/* Card media section */
.card-media {
  position: relative;
  width: 100%;
  height: 200px;
  overflow: hidden;
  margin: 0 0 var(--space-md) 0;
}

.card-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-normal) var(--transition-smooth);
}

.card:hover .card-media img {
  transform: scale(1.05);
}

/* Card meta information */
.card-meta {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  font-size: 0.875rem;
  color: var(--text-tertiary);
  padding: 0 var(--space-lg) var(--space-md);
}

.card-meta-item {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.card-meta-item i {
  font-size: 0.75rem;
}


/* Card actions - now integrated into card design */
.card-actions {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  padding: var(--space-md) var(--space-lg);
  background-color: rgba(248, 250, 252, 0.5);
  border-top: 1px solid rgba(229, 231, 235, 0.5);
  gap: var(--space-sm);
  margin: 0;
}

/* Remove buttons from clickable cards */
.card-clickable .card-actions {
  display: none;
}

/* Card footer for additional info */
.card-footer {
  padding: var(--space-sm) var(--space-lg);
  background-color: rgba(248, 250, 252, 0.3);
  border-top: 1px solid rgba(229, 231, 235, 0.3);
  font-size: 0.875rem;
  color: var(--text-secondary);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* Card status indicator */
.card-status {
  position: absolute;
  top: var(--space-md);
  right: var(--space-md);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  background: var(--gradient-primary);
  color: white;
  box-shadow: var(--shadow-sm);
}



/* Progress Bar Component */
.progress-container {
  margin: var(--space-sm) 0 var(--space-md);
  position: relative;
}

.progress-bar {
  height: 8px;
  background-color: var(--divider);
  border-radius: var(--radius-full);
  overflow: hidden;
  box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.05);
}

.progress-value {
  height: 100%;
  background: linear-gradient(to right, var(--primary-dark), var(--primary));
  border-radius: var(--radius-full);
  position: relative;
  transition: width 0.5s ease;
}

.progress-value::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(
    90deg,
    rgba(255, 255, 255, 0) 0%,
    rgba(255, 255, 255, 0.3) 50%,
    rgba(255, 255, 255, 0) 100%
  );
}


.progress-label {
  display: flex;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.progress-percentage {
  font-weight: 600;
  color: var(--primary);
}

/* Stats Card Component */
.stats-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-lg);
  margin-bottom: var(--space-xl);
}

.stat-card {
  background-color: var(--card-background);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: var(--space-lg);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(229, 231, 235, 0.5);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.stat-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}

.stat-card::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 60px;
  height: 60px;
  background-color: var(--primary-light);
  border-radius: 0 0 0 60px;
  opacity: 0.5;
  transform: translate(30px, -30px);
  transition: transform var(--transition-normal);
}

.stat-card:hover::before {
  transform: translate(20px, -20px);
}

.stat-icon {
  position: absolute;
  top: var(--space-md);
  right: var(--space-md);
  font-size: 1.2rem;
  color: var(--primary);
  z-index: 1;
}

.stat-value {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: var(--space-xs);
  background: linear-gradient(90deg, var(--primary-dark), var(--primary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1;
}

.stat-label {
  font-size: 0.95rem;
  color: var(--text-secondary);
  font-weight: 500;
  margin-bottom: var(--space-sm);
}

.stat-change {
  font-size: 0.8rem;
  margin-top: var(--space-xs);
  display: flex;
  align-items: center;
  font-weight: 600;
}

.positive-change {
  color: var(--success);
}

.positive-change i, .negative-change i {
  margin-right: 3px;
  font-size: 0.75rem;
}

.negative-change {
  color: var(--error);
}

/* Info Display Components (shared by student detail, assignment detail, edit material) */
.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-lg);
    margin-bottom: var(--space-xl);
}

.info-card {
    background-color: var(--background);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
}

.info-card h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-md);
}

.info-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-sm) 0;
    border-bottom: 1px solid var(--border-color);
}

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

.info-label {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.info-value {
    color: var(--text-primary);
    font-weight: 500;
}

/* Progress Steps Component */
.registration-progress,
.invitation-progress {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-xl);
  position: relative;
}

.progress-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  position: relative;
  z-index: 1;
  min-width: 60px;
}

.step-number {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  background-color: var(--divider);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  margin-bottom: var(--space-xs);
  transition: all var(--transition-normal);
  border: 2px solid transparent;
}

.step-label {
  font-size: 0.8rem;
  color: var(--text-secondary);
  text-align: center;
  transition: color var(--transition-normal);
  white-space: nowrap;
}

.progress-step.active .step-number {
  background-color: var(--primary);
  color: white;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-light);
}

.progress-step.active .step-label {
  color: var(--primary);
  font-weight: 600;
}

.progress-step.completed .step-number {
  background-color: var(--success);
  color: white;
  border-color: var(--success);
}

.progress-step.completed .step-label {
  color: var(--success);
}

.progress-connector {
  position: absolute;
  top: 20px;
  left: 50%;
  width: 100%;
  height: 2px;
  background-color: var(--divider);
  z-index: 0;
  transition: background-color var(--transition-normal);
}

/* Style connector when the step before it is completed */
.progress-step.completed + .progress-connector {
  background-color: var(--success);
}

/* Additional rules to ensure all connectors between completed steps are styled */
.progress-step.completed ~ .progress-step.completed ~ .progress-connector {
  background-color: var(--success);
}

/* Ensure connectors following any completed steps remain green until an incomplete step */
.registration-progress .progress-step.completed ~ .progress-connector {
  background-color: var(--success);
}

/* Reset connector color when it follows an incomplete step */
.registration-progress .progress-step:not(.completed) ~ .progress-connector {
  background-color: var(--divider);
}

/* Modal Component */
.modal {
  display: none;
  position: fixed;
  z-index: 1000;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  overflow: auto;
  background-color: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(2px);
}

.modal.show {
  display: block;
  animation: fadeIn var(--transition-normal);
}

/* fadeIn animation defined in utilities.css */

.modal-content {
  background-color: var(--background);
  margin: 1% auto;
  padding: 0;
  border-radius: var(--radius-lg);
  width: 90%;
  max-width: 900px;
  max-height: 95vh;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  animation: slideUp var(--transition-normal);
}


.modal-header {
  padding: var(--space-lg);
  background-color: var(--background-alt);
  border-bottom: 1px solid var(--divider);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-header h3 {
  margin: 0;
  color: var(--text-primary);
  font-size: 1.25rem;
}

.modal-body {
  padding: var(--space-lg);
  overflow-y: auto;
  max-height: calc(90vh - 160px);
  min-height: 200px;
}

.modal-footer {
  padding: var(--space-lg);
  background-color: var(--background-alt);
  border-top: 1px solid var(--divider);
  display: flex;
  justify-content: flex-end;
  gap: var(--space-sm);
}

.close-modal {
  background: none;
  border: none;
  font-size: 24px;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 0;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

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

/* Success modal */
.success-modal {
  text-align: center;
  padding: var(--space-xl) var(--space-lg);
}

.success-icon {
  font-size: 4rem;
  color: var(--success);
  margin-bottom: var(--space-lg);
  animation: bounceIn 0.6s;
}


.success-modal h3 {
  color: var(--text-primary);
  margin-bottom: var(--space-sm);
  font-size: 1.5rem;
}

.success-modal p {
  color: var(--text-secondary);
  margin-bottom: var(--space-xl);
}

.success-actions {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
}

/* Error modal */
.error-modal {
  text-align: center;
  padding: var(--space-xl) var(--space-lg);
}

.error-icon {
  font-size: 4rem;
  color: var(--error);
  margin-bottom: var(--space-lg);
}

/* Subject Selection Styles */
.subject-selector {
  margin-top: var(--space-xs);
}

.subject-options {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: var(--space-sm);
}

.subject-option {
  display: flex;
  align-items: center;
  background-color: #f8f9ff;
  padding: 8px 16px;
  border-radius: var(--radius-md);
  border: 1px solid var(--divider);
  transition: all var(--transition-fast);
  margin-bottom: 4px;
}

.subject-option:hover {
  border-color: var(--primary-light);
  background-color: rgba(219, 234, 254, 0.3);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.subject-option input[type="checkbox"] {
  margin-right: var(--space-xs);
}

/* Toggle Switch Component */
.toggle-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-md);
}

.toggle-label {
  font-weight: 500;
  color: var(--text-primary);
}

.switch {
  position: relative;
  display: inline-block;
  width: 48px;
  height: 24px;
}

.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--divider);
  transition: all var(--transition-fast);
  border-radius: 34px;
}

.slider:before {
  position: absolute;
  content: "";
  height: 16px;
  width: 16px;
  left: 4px;
  bottom: 4px;
  background-color: white;
  transition: all var(--transition-fast);
  border-radius: 50%;
}

input:checked + .slider {
  background-color: var(--primary);
}

input:focus + .slider {
  box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.2);
}

input:checked + .slider:before {
  transform: translateX(24px);
}

/* Schedule Selection Styles */
.schedule-options {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  margin-top: var(--space-xs);
}

.schedule-option {
  display: flex;
  align-items: center;
}

.schedule-option input[type="radio"] {
  margin-right: var(--space-xs);
}

.day-selector {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  margin-top: var(--space-xs);
}

.day-option {
  display: flex;
  align-items: center;
  background-color: #f8f9ff;
  padding: 8px 16px;
  border-radius: var(--radius-full);
  border: 1px solid var(--divider);
  transition: all var(--transition-fast);
}

.day-option:hover {
  border-color: var(--primary-light);
  background-color: rgba(219, 234, 254, 0.3);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.day-option input[type="checkbox"] {
  margin-right: var(--space-xs);
}

.time-selector {
  display: flex;
  gap: var(--space-md);
}

.time-field {
  flex: 1;
}

/* File Upload Component */
.upload-container {
  margin-top: var(--space-md);
}

.upload-dropzone {
  border: 2px dashed var(--divider);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-fast);
  background-color: var(--background-alt);
}

.upload-dropzone:hover {
  border-color: var(--primary);
  background-color: var(--primary-light);
  box-shadow: var(--shadow-sm);
}

.upload-dropzone.dragover {
  border-color: var(--primary);
  background-color: var(--primary-light);
}

.upload-dropzone i {
  font-size: 48px;
  color: var(--text-tertiary);
  margin-bottom: var(--space-md);
}

.upload-dropzone p {
  margin: var(--space-sm) 0;
  color: var(--text-secondary);
}

.upload-hint {
  font-size: 0.875rem;
  color: var(--text-tertiary);
}

.upload-previews {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-top: var(--space-md);
}

.upload-preview {
  position: relative;
  width: 100px;
  height: 100px;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.upload-preview img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.upload-preview-file {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  background-color: var(--primary-light);
}

.upload-preview-file i {
  font-size: 1.5rem;
  color: var(--primary);
  margin-bottom: var(--space-xs);
}

.upload-preview-file-name {
  font-size: 0.7rem;
  text-align: center;
  padding: 0 var(--space-xs);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 100%;
}

.remove-file {
  position: absolute;
  top: 2px;
  right: 2px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.8);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 0.7rem;
  color: var(--error);
  transition: background-color var(--transition-fast);
}

.remove-file:hover {
  background-color: white;
}

/* Review Section Styles */
.review-section {
  background-color: var(--background);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  margin-bottom: var(--space-lg);
}

.review-item {
  display: flex;
  margin-bottom: var(--space-sm);
}

.review-item:last-child {
  margin-bottom: 0;
}

.review-label {
  font-weight: 600;
  width: 150px;
  color: var(--text-secondary);
}

.review-value {
  color: var(--text-primary);
  flex: 1;
}

/* Form Actions */
.form-actions {
  display: flex;
  justify-content: space-between;
  margin-top: var(--space-xl);
  border-top: 1px solid var(--divider);
  padding-top: var(--space-lg);
  gap: var(--space-md);
}

/* Avatar Component */
.avatar {
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--secondary-light), var(--primary-light));
  color: var(--primary);
  font-weight: 600;
  box-shadow: var(--shadow-sm);
  flex-shrink: 0;
  position: relative;
  overflow: hidden;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
  z-index: 1;
}

.avatar::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at 70% 70%, rgba(255, 255, 255, 0.3), transparent 50%);
  z-index: -1;
}

/* Avatar sizes */
.avatar-sm {
  width: 40px;
  height: 40px;
  font-size: 1rem;
}

.avatar-md {
  width: 48px;
  height: 48px;
  font-size: 1.1rem;
}

/* Fix icon positioning in avatars */
.avatar i {
  margin: 0;
  line-height: 1;
}

.avatar-lg {
  width: 80px;
  height: 80px;
  font-size: 1.8rem;
  box-shadow: var(--shadow-md);
  border: 3px solid white;
}

/* Avatar hover effects */
.avatar-hover:hover {
  transform: scale(1.05);
  box-shadow: var(--shadow-lg);
}

/* Avatar color variants */


.avatar-info {
  background: linear-gradient(135deg, var(--info-light), var(--secondary-light));
  color: var(--info-dark);
}



/* List Item Component */
.list-item {
  display: flex;
  align-items: center;
  padding: var(--space-md);
  border-radius: var(--radius-md);
  background-color: #f8f9ff;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-fast);
  position: relative;
  margin-bottom: var(--space-md);
  cursor: pointer;
  gap: var(--space-lg);
}

.list-item:hover {
  background-color: rgba(242, 245, 250, 0.95);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.list-item:last-child {
  margin-bottom: 0;
}

/* List item grid layout variant */
.list-item-grid {
  display: grid;
  grid-template-columns: 48px 1fr auto auto;
  gap: var(--space-lg);
  align-items: center;
}

/* List item sections */
.list-item-avatar {
  flex-shrink: 0;
}

.list-item-content {
  flex: 1;
  min-width: 0; /* Allows text truncation */
}

.list-item-title {
  font-weight: 600;
  margin-bottom: 4px;
  color: var(--text-primary);
  transition: color var(--transition-fast);
}

.list-item:hover .list-item-title {
  color: var(--primary);
}

.list-item-subtitle {
  font-size: 0.85rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
}

.list-item-meta {
  display: flex;
  align-items: center;
  font-size: 0.85rem;
  color: var(--text-secondary);
  flex-wrap: wrap;
  gap: var(--space-xs) var(--space-sm);
}

.list-item-meta i {
  margin-right: 4px;
  color: var(--text-tertiary);
  font-size: 0.75rem;
}

/* List item actions section */
.list-item-actions {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  flex-shrink: 0;
  justify-content: flex-end;
}

.list-item-status {
  margin: 0 var(--space-md);
}

.list-item-date {
  text-align: right;
  color: var(--text-secondary);
  font-size: 0.9rem;
  flex-shrink: 0;
  margin-left: auto;
}

.list-item-date .session-day {
  font-size: 0.8rem;
  margin-top: 3px;
  color: var(--text-tertiary);
}

/* List item separator for meta items */
.list-item-separator {
  color: var(--text-tertiary);
  margin: 0 var(--space-xs);
}

.list-item-separator::before {
  content: "•";
}

/* List item with expandable content */
.list-item-expandable {
  cursor: pointer;
}

.list-item-expand-icon {
  transition: transform var(--transition-fast);
}

.list-item-expandable.expanded .list-item-expand-icon {
  transform: rotate(90deg);
}

/* List item with buttons */
.list-item .btn {
  flex-shrink: 0;
}

.list-item-actions .btn {
  white-space: nowrap;
}

.list-item .join-btn {
  min-width: 80px;
  height: 38px;
  align-self: center;
  margin-left: var(--space-md);
}

.list-item .placeholder-btn {
  min-width: 80px;
  height: 38px;
  visibility: hidden;
  align-self: center;
  margin-left: var(--space-md);
}

/* Hub Selector Component */
.hub-selector {
  position: relative;
  margin-right: var(--space-md);
}

.hub-selector-button {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-xs) var(--space-md);
  background-color: #f9fafb;
  border: 1px solid #d1d5db;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-normal);
  font-size: 0.9rem;
}

.hub-selector-button:hover {
  background-color: var(--primary-light);
  border-color: var(--primary);
  box-shadow: var(--shadow-sm);
}

.hub-info {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.hub-label {
  color: var(--text-tertiary);
  font-weight: 500;
}

.hub-name {
  color: var(--text-primary);
  font-weight: 600;
}

.hub-selector-button i {
  font-size: 0.8rem;
  color: var(--text-tertiary);
  transition: transform var(--transition-fast);
}

.hub-selector-button:hover i {
  color: var(--text-secondary);
}

/* Hub Dropdown */
.hub-dropdown {
  position: absolute;
  top: calc(100% + var(--space-xs));
  left: 0;
  min-width: 200px;
  background-color: var(--card-background);
  border: 1px solid var(--divider);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: var(--space-xs);
  display: none;
  z-index: 1000;
}

.hub-dropdown.show {
  display: block;
}

.hub-option {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: var(--space-sm) var(--space-md);
  background: none;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  font-size: 0.9rem;
  color: var(--text-primary);
  text-align: left;
}

.hub-option:hover:not(:disabled) {
  background-color: var(--background-alt);
}

.hub-option.active {
  background-color: var(--primary-light);
  color: var(--primary);
  font-weight: 600;
}

.hub-option:disabled {
  cursor: default;
  opacity: 0.8;
}

.hub-option-name {
  flex: 1;
}

.hub-option i {
  color: var(--primary);
  font-size: 0.8rem;
  margin-left: var(--space-sm);
}

/* Help Text Component */
.help-text-container {
  position: relative;
  display: inline-flex;
  vertical-align: baseline;
  margin-left: var(--space-sm);
  align-items: center;
}

/* Specific alignment for help text in headings */
h1 .help-text-container,
h2 .help-text-container {
  vertical-align: middle;
  margin-bottom: 0;
}

.help-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  border-radius: var(--radius-full);
  background-color: var(--text-tertiary);
  color: white;
  cursor: pointer;
  font-size: 14px;
  font-weight: 600;
  transition: all var(--transition-fast);
  text-decoration: none;
  position: relative;
}

.help-icon:hover {
  background-color: var(--secondary);
  transform: scale(1.1);
  box-shadow: var(--shadow-sm);
}

.help-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  left: -256px;
  width: 562px;
  max-width: 90vw;
  background-color: var(--card-background);
  border: 1px solid var(--divider);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: var(--space-lg);
  display: none;
  z-index: 1000;
}

.help-dropdown.show {
  display: block;
  animation: dropdownSlideIn 0.2s ease-out;
}

.help-dropdown::before {
  content: "";
  position: absolute;
  top: -6px;
  left: 256px;
  width: 12px;
  height: 12px;
  background-color: var(--card-background);
  border-left: 1px solid var(--divider);
  border-top: 1px solid var(--divider);
  transform: rotate(45deg);
}

.help-dropdown-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-sm);
  border-bottom: 1px solid var(--divider);
}

.help-dropdown-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin: 0;
}

.help-dropdown-close {
  background-color: var(--background-hover);
  border: 1px solid var(--divider);
  font-size: 24px;
  color: var(--text-primary);
  cursor: pointer;
  padding: 0;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  font-weight: 600;
}

.help-dropdown-close:hover {
  background-color: var(--error-light);
  color: var(--error);
  border-color: var(--error);
  transform: scale(1.05);
}

.help-dropdown-content {
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--text-secondary);
  padding-right: var(--space-sm);
}


.help-dropdown-content h5 {
  font-size: 1rem;
  color: var(--text-primary);
  margin-top: var(--space-md);
  margin-bottom: var(--space-xs);
}

.help-dropdown-content ul {
  margin: var(--space-xs) 0;
  padding-left: var(--space-lg);
}

.help-dropdown-content li {
  margin-bottom: var(--space-xs);
}

.help-dropdown-content strong {
  color: var(--text-primary);
  font-weight: 600;
}

.help-dropdown-content a {
  color: var(--primary);
  text-decoration: underline;
  font-weight: 500;
  transition: color var(--transition-fast);
}

.help-dropdown-content a:hover {
  color: var(--primary-dark);
  text-decoration: underline;
}

/* Mobile adjustments */
@media (max-width: 768px) {
  .help-dropdown {
    position: fixed;
    width: calc(100vw - 40px);
    max-width: 380px;
    left: 50%;
    right: auto;
    top: 50%;
    bottom: auto;
    transform: translate(-50%, -50%);
    max-height: 80vh;
    overflow-y: auto;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    z-index: 1001;
    border-radius: var(--radius-lg);
    margin: 0;
  }
  
  .help-dropdown.show {
    animation: slideUp 0.2s ease-out;
  }
  
  .help-dropdown::before {
    display: none; /* Hide arrow on mobile */
  }
  
  .help-dropdown-header {
    position: sticky;
    top: 0;
    background-color: var(--card-background);
    z-index: 1;
    padding-bottom: var(--space-md);
    margin-bottom: var(--space-sm);
    border-bottom: 1px solid var(--divider);
  }
  
  .help-icon {
    width: 24px;
    height: 24px;
    font-size: 16px;
  }
  
  /* Backdrop for mobile */
  .help-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.4);
    z-index: 1000;
    animation: fadeIn 0.2s ease-out;
    backdrop-filter: blur(2px);
    -webkit-backdrop-filter: blur(2px);
  }
}

/* Success modal styles consolidated with modal component above */

/* === Modern Card Variants === */

/* Material card specific design */
.material-card {
  background: white;
  border-radius: 12px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
  transition: all var(--transition-normal) var(--transition-smooth);
  border: 1px solid rgba(0, 0, 0, 0.04);
  overflow: hidden;
  position: relative;
  cursor: pointer;
  text-decoration: none;
  display: block;
  color: inherit;
}

.material-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

.material-card-header {
  padding: var(--space-lg);
  background: linear-gradient(135deg, #f8f9ff 0%, #ffffff 100%);
  border-bottom: 1px solid rgba(0, 0, 0, 0.04);
}

.material-card-content {
  padding: var(--space-lg);
}

.material-type-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: 6px 12px;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  background-color: #e3f2fd;
  color: #1565c0;
  border: 1px solid #bbdefb;
  box-shadow: none;
}

/* Assignment card design */
.assignment-card {
  background: white;
  border-radius: 12px;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
  transition: all var(--transition-normal) var(--transition-smooth);
  border: 1px solid rgba(0, 0, 0, 0.05);
  overflow: hidden;
  position: relative;
  cursor: pointer;
  text-decoration: none;
  display: block;
  color: inherit;
  padding: 0;
}

.assignment-card:hover {
  background-color: rgba(241, 245, 255, 0.8);
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
}

.assignment-card-header {
  padding: var(--space-md) var(--space-lg);
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
}

.assignment-card-content {
  padding: 0 var(--space-lg) var(--space-lg);
}

.assignment-card-footer {
  padding: var(--space-md) var(--space-lg);
  background-color: rgba(248, 250, 252, 0.5);
  border-top: 1px solid rgba(229, 231, 235, 0.3);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.875rem;
  color: var(--text-secondary);
}

/* Dashboard card grid */
.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--space-lg);
  margin-bottom: var(--space-xl);
}

/* Quick action cards */
.quick-action-card {
  background: white;
  border-radius: 12px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
  padding: var(--space-lg);
  text-align: center;
  transition: all var(--transition-normal) var(--transition-smooth);
  border: 1px solid rgba(0, 0, 0, 0.04);
  cursor: pointer;
  text-decoration: none;
  display: block;
  color: inherit;
  position: relative;
  overflow: hidden;
}

.quick-action-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--gradient-primary);
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.quick-action-card:hover::before {
  opacity: 0.05;
}

.quick-action-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

.quick-action-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--space-md);
  background: var(--gradient-primary);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.5rem;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.2);
  transition: transform var(--transition-normal) var(--transition-bounce);
}

.quick-action-card:hover .quick-action-icon {
  transform: scale(1.1) rotate(-5deg);
}

.quick-action-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-xs);
}

.quick-action-description {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

/* Student card design */
.student-card {
  background: white;
  border-radius: 12px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
  transition: all var(--transition-normal) var(--transition-smooth);
  border: 1px solid rgba(0, 0, 0, 0.04);
  overflow: visible;
  cursor: pointer;
  text-decoration: none;
  display: block;
  color: inherit;
  position: relative;
}

.student-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

.student-card-header {
  padding: var(--space-lg);
  text-align: center;
  background-color: #ffffff;
  position: relative;
  z-index: 1;
}

.student-card-avatar {
  margin: 0 auto var(--space-md);
}

.student-card-content {
  padding: var(--space-lg);
  text-align: center;
}

.student-card-stats {
  display: flex;
  justify-content: space-around;
  padding: var(--space-md) 0;
  border-top: 1px solid var(--divider);
  margin-top: var(--space-md);
}

.student-card-stat {
  text-align: center;
}

.student-card-stat-value {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--primary);
  display: block;
}

.student-card-stat-label {
  font-size: 0.75rem;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* Responsive card adjustments */
@media (max-width: 768px) {
  .info-grid {
    grid-template-columns: 1fr;
  }

  .dashboard-grid {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }

  .card {
    border-radius: 12px;
    margin-bottom: var(--space-md);
  }
  
  .card-header,
  .card-content,
  .card-footer {
    padding-left: var(--space-md);
    padding-right: var(--space-md);
  }
  
  .quick-action-card {
    padding: var(--space-md);
  }
  
  .quick-action-icon {
    width: 48px;
    height: 48px;
    font-size: 1.25rem;
  }
}

@media (max-width: 480px) {
  .card {
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
  }
  
  .card:hover {
    transform: translateY(-1px) scale(1);
  }
  
  .card-title {
    font-size: 1rem;
  }
  
  .card-subtitle {
    font-size: 0.8125rem;
  }
}