/**
 * UI Components
 * Buttons, cards, forms, and other reusable elements
 */

/* ==========================================================================
   BUTTONS
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-2);
  padding: var(--spacing-3) var(--spacing-6);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  line-height: 1;
  text-decoration: none;
  border: var(--border-width-2) solid transparent;
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition-fast);
  min-height: 44px; /* Accessibility: minimum touch target */
  min-width: 44px;
}

.btn:focus {
  outline: var(--focus-ring-width) solid var(--focus-ring-color);
  outline-offset: var(--focus-ring-offset);
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* Primary button */
.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
  border-color: var(--color-primary);
}

.btn-primary:hover:not(:disabled) {
  background-color: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
}

/* Secondary button */
.btn-secondary {
  background-color: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.btn-secondary:hover:not(:disabled) {
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
}

/* Ghost button */
.btn-ghost {
  background-color: transparent;
  color: var(--color-text-secondary);
  border-color: transparent;
}

.btn-ghost:hover:not(:disabled) {
  background-color: var(--color-bg-tertiary);
  color: var(--color-text-primary);
}

/* Button sizes */
.btn-sm {
  padding: var(--spacing-2) var(--spacing-4);
  font-size: var(--font-size-sm);
  min-height: 36px;
}

.btn-lg {
  padding: var(--spacing-4) var(--spacing-8);
  font-size: var(--font-size-lg);
  min-height: 52px;
}

/* Full width button */
.btn-block {
  display: flex;
  width: 100%;
}

/* Button with icon */
.btn-icon {
  padding: var(--spacing-3);
}

.btn-icon svg {
  width: 20px;
  height: 20px;
}

/* ==========================================================================
   FORMS
   ========================================================================== */

.form-group {
  margin-bottom: var(--spacing-6);
}

.form-label {
  display: block;
  margin-bottom: var(--spacing-2);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-primary);
}

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

.form-hint {
  display: block;
  margin-top: var(--spacing-1);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

/* Input fields */
.form-input,
.form-textarea,
.form-select {
  display: block;
  width: 100%;
  padding: var(--spacing-3) var(--spacing-4);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--color-text-primary);
  background-color: var(--color-bg-primary);
  border: var(--border-width-2) solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  min-height: 44px; /* Accessibility touch target */
}

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

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--color-text-muted);
}

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

/* Error state */
.form-input-error {
  border-color: var(--color-error);
}

.form-input-error:focus {
  box-shadow: 0 0 0 3px var(--color-error-light);
}

.form-error {
  display: block;
  margin-top: var(--spacing-2);
  font-size: var(--font-size-sm);
  color: var(--color-error);
}

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

/* Select */
.form-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%236b7280' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--spacing-3) center;
  padding-right: var(--spacing-10);
}

/* Checkbox and Radio */
.form-check {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-3);
  min-height: 44px;
  padding: var(--spacing-2) 0;
}

.form-check-input {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  margin-top: 2px;
  accent-color: var(--color-primary);
  cursor: pointer;
}

.form-check-label {
  font-weight: var(--font-weight-normal);
  color: var(--color-text-primary);
  cursor: pointer;
}

/* Checkbox group */
.form-check-group {
  display: grid;
  gap: var(--spacing-2);
}

@media (min-width: 640px) {
  .form-check-group-inline {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-4);
  }
  
  .form-check-group-inline .form-check {
    flex: 0 0 auto;
  }
}

/* ==========================================================================
   CARDS
   ========================================================================== */

.card {
  background-color: var(--color-bg-primary);
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--spacing-6);
  box-shadow: var(--shadow-sm);
}

.card-header {
  margin-bottom: var(--spacing-4);
  padding-bottom: var(--spacing-4);
  border-bottom: var(--border-width) solid var(--color-border);
}

.card-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  margin-bottom: 0;
}

.card-body {
  /* Default padding already set on .card */
}

.card-footer {
  margin-top: var(--spacing-4);
  padding-top: var(--spacing-4);
  border-top: var(--border-width) solid var(--color-border);
}

/* Clickable card */
.card-interactive {
  cursor: pointer;
  transition: box-shadow var(--transition-fast), transform var(--transition-fast);
}

.card-interactive:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.card-interactive:focus {
  outline: var(--focus-ring-width) solid var(--focus-ring-color);
  outline-offset: var(--focus-ring-offset);
}

/* ==========================================================================
   BADGES
   ========================================================================== */

.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--spacing-1) var(--spacing-2);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: var(--letter-spacing-wide);
}

.badge-primary {
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
}

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

.badge-success {
  background-color: var(--color-success-light);
  color: var(--color-success);
}

.badge-warning {
  background-color: var(--color-warning-light);
  color: var(--color-warning);
}

.badge-error {
  background-color: var(--color-error-light);
  color: var(--color-error);
}

/* ==========================================================================
   ALERTS
   ========================================================================== */

.alert {
  padding: var(--spacing-4);
  border-radius: var(--radius-lg);
  border-left: 4px solid;
  margin-bottom: var(--spacing-4);
}

.alert-info {
  background-color: var(--color-info-light);
  border-color: var(--color-info);
  color: var(--color-info);
}

.alert-success {
  background-color: var(--color-success-light);
  border-color: var(--color-success);
  color: var(--color-success);
}

.alert-warning {
  background-color: var(--color-warning-light);
  border-color: var(--color-warning);
  color: var(--color-warning);
}

.alert-error {
  background-color: var(--color-error-light);
  border-color: var(--color-error);
  color: var(--color-error);
}

.alert-title {
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--spacing-2);
}

/* ==========================================================================
   PROGRESS BAR
   ========================================================================== */

.progress {
  width: 100%;
  height: 8px;
  background-color: var(--color-bg-tertiary);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  background-color: var(--color-primary);
  border-radius: var(--radius-full);
  transition: width var(--transition-slow);
}

/* Larger progress bar with label */
.progress-lg {
  height: 24px;
  position: relative;
}

.progress-label {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-primary);
}

/* ==========================================================================
   DIVIDERS
   ========================================================================== */

.divider {
  display: flex;
  align-items: center;
  margin: var(--spacing-6) 0;
}

.divider::before,
.divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background-color: var(--color-border);
}

.divider-text {
  padding: 0 var(--spacing-4);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

/* ==========================================================================
   LOADING SPINNER
   ========================================================================== */

.spinner {
  display: inline-block;
  width: 24px;
  height: 24px;
  border: 3px solid var(--color-bg-tertiary);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

.spinner-sm {
  width: 16px;
  height: 16px;
  border-width: 2px;
}

.spinner-lg {
  width: 40px;
  height: 40px;
  border-width: 4px;
}

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

/* Loading overlay */
.loading-overlay {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: rgba(255, 255, 255, 0.9);
  z-index: var(--z-overlay);
}

/* ==========================================================================
   SKIP LINK (Accessibility)
   ========================================================================== */

.skip-link {
  position: absolute;
  top: -100px;
  left: 0;
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
  padding: var(--spacing-3) var(--spacing-6);
  text-decoration: none;
  font-weight: var(--font-weight-medium);
  z-index: var(--z-toast);
  border-radius: 0 0 var(--radius-lg) 0;
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: 0;
  outline: var(--focus-ring-width) solid var(--focus-ring-color);
  outline-offset: var(--focus-ring-offset);
}

/* ==========================================================================
   PRINT INSTRUCTIONS MODAL
   Warm, paper-inspired design for booklet assembly instructions
   ========================================================================== */

.print-instructions-modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, rgba(30, 41, 59, 0.7) 0%, rgba(15, 23, 42, 0.85) 100%);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 1.5rem;
  animation: modalFadeIn 0.25s ease-out;
}

@keyframes modalFadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

.print-instructions-content {
  background: linear-gradient(180deg, #fffbf5 0%, #fff8f0 100%);
  border-radius: 16px;
  padding: 2.5rem;
  max-width: 520px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow:
    0 25px 50px -12px rgba(0, 0, 0, 0.25),
    0 0 0 1px rgba(139, 90, 43, 0.1),
    inset 0 1px 0 rgba(255, 255, 255, 0.8);
  animation: modalSlideUp 0.3s ease-out;
  position: relative;
}

@keyframes modalSlideUp {
  from {
    opacity: 0;
    transform: translateY(20px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.print-instructions-content::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, #059669 0%, #10b981 50%, #34d399 100%);
  border-radius: 16px 16px 0 0;
}

.print-instructions-content h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: #1e293b;
  margin: 0 0 1.5rem 0;
  text-align: center;
  letter-spacing: -0.02em;
  line-height: 1.3;
}

.print-instructions-content h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: #059669;
  margin: 0 0 0.75rem 0;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.print-instructions-content h3::before {
  content: '';
  width: 4px;
  height: 1.1rem;
  background: #059669;
  border-radius: 2px;
}

.print-info {
  background: linear-gradient(135deg, #ecfdf5 0%, #d1fae5 100%);
  padding: 1.25rem;
  border-radius: 12px;
  text-align: center;
  margin-bottom: 1.5rem;
  border: 1px solid rgba(5, 150, 105, 0.2);
}

.print-info p {
  margin: 0;
  color: #065f46;
  font-size: 1.05rem;
  font-weight: 500;
}

.print-settings {
  margin-bottom: 1.5rem;
  padding: 1.25rem;
  background: rgba(255, 255, 255, 0.6);
  border-radius: 12px;
  border: 1px solid rgba(0, 0, 0, 0.06);
}

.print-settings p {
  margin: 0 0 0.75rem 0;
  color: #475569;
  font-size: 1rem;
}

.print-settings ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.print-settings li {
  margin-bottom: 0.625rem;
  color: #334155;
  font-size: 1.05rem;
  line-height: 1.5;
  padding-left: 1.75rem;
  position: relative;
}

.print-settings li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: #059669;
  font-weight: 600;
}

.print-settings li:last-child {
  margin-bottom: 0;
}

.assembly-steps {
  margin-bottom: 1.5rem;
}

.assembly-steps ol {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: steps;
}

.assembly-steps li {
  margin-bottom: 0.75rem;
  color: #334155;
  font-size: 1.05rem;
  line-height: 1.5;
  padding-left: 2.5rem;
  position: relative;
  counter-increment: steps;
}

.assembly-steps li::before {
  content: counter(steps);
  position: absolute;
  left: 0;
  top: 0;
  width: 1.75rem;
  height: 1.75rem;
  background: linear-gradient(135deg, #059669 0%, #10b981 100%);
  color: white;
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 4px rgba(5, 150, 105, 0.3);
}

.assembly-steps li:last-child {
  margin-bottom: 0;
}

.assembly-diagram {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  margin: 1.75rem 0;
  padding: 1.5rem 1rem;
  background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
  border-radius: 12px;
  border: 1px solid rgba(0, 0, 0, 0.06);
}

.diagram-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem;
}

.diagram-icon {
  font-size: 2.25rem;
  filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
}

.diagram-step span {
  font-size: 0.85rem;
  font-weight: 500;
  color: #64748b;
  text-align: center;
}

.diagram-arrow {
  font-size: 1.5rem;
  color: #94a3b8;
  font-weight: 300;
}

.print-instructions-content .close-modal-btn,
.print-instructions-content .btn.close-modal-btn {
  display: block;
  width: 100%;
  margin-top: 1.5rem;
  padding: 1rem 1.5rem;
  font-size: 1.1rem;
  font-weight: 600;
  background: linear-gradient(135deg, #059669 0%, #10b981 100%);
  color: white;
  border: none;
  border-radius: 10px;
  cursor: pointer;
  transition: all 0.2s ease;
  box-shadow: 0 4px 12px rgba(5, 150, 105, 0.3);
}

.print-instructions-content .close-modal-btn:hover,
.print-instructions-content .btn.close-modal-btn:hover {
  background: linear-gradient(135deg, #047857 0%, #059669 100%);
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(5, 150, 105, 0.4);
}

.print-instructions-content .close-modal-btn:active,
.print-instructions-content .btn.close-modal-btn:active {
  transform: translateY(0);
}

/* Responsive adjustments */
@media (max-width: 540px) {
  .print-instructions-modal {
    padding: 1rem;
  }

  .print-instructions-content {
    padding: 1.75rem;
    border-radius: 12px;
  }

  .print-instructions-content h2 {
    font-size: 1.3rem;
  }

  .assembly-diagram {
    flex-direction: column;
    gap: 0.5rem;
    padding: 1.25rem;
  }

  .diagram-arrow {
    transform: rotate(90deg);
    margin: 0.25rem 0;
  }

  .diagram-step {
    flex-direction: row;
    gap: 0.75rem;
    width: 100%;
    justify-content: center;
  }

  .diagram-icon {
    font-size: 1.75rem;
  }
}