/* Reusable UI Components */

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  padding: var(--space-sm) var(--space-lg);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  text-decoration: none;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  cursor: pointer;
  border: none;
  white-space: nowrap;
}

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

.btn--primary:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-lg);
}

.btn--secondary {
  background: var(--color-bg-tertiary);
  color: var(--color-text-primary);
  border: 1px solid var(--glass-border);
}

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

.btn--small {
  padding: var(--space-xs) var(--space-md);
  font-size: var(--font-size-sm);
}

.btn--large {
  padding: var(--space-md) var(--space-xl);
  font-size: var(--font-size-lg);
}

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

/* Cards */
.card {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  padding: var(--space-lg);
  transition: all var(--transition-base);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
  border-color: rgba(255, 255, 255, 0.15);
}

/* Progress Bar */
.progress-bar {
  height: 8px;
  background: var(--color-bg-tertiary);
  border-radius: var(--radius-full);
  overflow: hidden;
  position: relative;
}

.progress-bar__fill {
  height: 100%;
  background: var(--color-gradient);
  transition: width var(--transition-slow);
  position: relative;
}

.progress-bar__fill::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, 
    transparent, 
    rgba(255,255,255,0.2), 
    transparent
  );
  animation: shimmer 2s infinite;
}

@keyframes shimmer {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

/* Form Elements */
.form-group {
  margin-bottom: var(--space-lg);
}

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

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: var(--space-sm) var(--space-md);
  background: var(--color-bg-secondary);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  color: var(--color-text-primary);
  font-size: var(--font-size-base);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.1);
}

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

.form-error {
  color: var(--color-error);
  font-size: var(--font-size-sm);
  margin-top: var(--space-xs);
  display: none;
}

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

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

/* Task Checkbox */
.task-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
  padding: var(--space-md);
  border-radius: var(--radius-md);
  transition: background var(--transition-fast);
  cursor: pointer;
}

.task-item:hover {
  background: var(--glass-bg);
}

.task-checkbox {
  appearance: none;
  width: 24px;
  height: 24px;
  min-width: 24px;
  border: 2px solid var(--color-primary);
  border-radius: var(--radius-sm);
  position: relative;
  cursor: pointer;
  transition: all var(--transition-base);
  margin-top: 2px;
}

.task-checkbox:checked {
  background: var(--color-gradient);
  border-color: transparent;
}

.task-checkbox:checked::after {
  content: '✓';
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 16px;
  font-weight: bold;
  animation: checkmark-pop var(--transition-base) cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

@keyframes checkmark-pop {
  0% { transform: scale(0); }
  50% { transform: scale(1.2); }
  100% { transform: scale(1); }
}

.task-text {
  flex: 1;
  color: var(--color-text-primary);
  line-height: var(--line-height-normal);
}

.task-help {
  background: var(--color-info);
  color: white;
  width: 20px;
  height: 20px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-bold);
  cursor: help;
  flex-shrink: 0;
}

/* Modal */
.modal {
  border: none;
  padding: 0;
  max-width: 600px;
  width: 90%;
  background: var(--color-bg-secondary);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  margin: 0;
}

.modal::backdrop {
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
}

.modal-content {
  padding: var(--space-xl);
}

.modal-close {
  position: absolute;
  top: var(--space-md);
  right: var(--space-md);
  background: var(--color-bg-tertiary);
  border-radius: var(--radius-full);
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background var(--transition-fast);
}

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

/* Save Indicator */
.save-indicator {
  position: fixed;
  bottom: var(--space-md);
  right: var(--space-md);
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: var(--space-sm) var(--space-md);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  z-index: var(--z-fixed);
  opacity: 0;
  transform: translateY(20px);
  transition: all var(--transition-base);
}

.save-indicator--visible {
  opacity: 1;
  transform: translateY(0);
}

.save-indicator__status::before {
  content: '●';
  color: var(--color-success);
  margin-right: var(--space-xs);
}

/* Badge */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.75rem;
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  border-radius: var(--radius-full);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
}

.badge--success {
  background: rgba(16, 185, 129, 0.1);
  border-color: var(--color-success);
  color: var(--color-success);
}

.badge--warning {
  background: rgba(251, 191, 36, 0.1);
  border-color: var(--color-warning);
  color: var(--color-warning);
}