/* ============================================================================
   Component System - Phase 46.4
   Standardized Components with 5-6 Variants Each

   Components:
   - Buttons (6 variants: primary, secondary, success, warning, danger, ghost)
   - Cards (4 variants: default, elevated, outline, minimal)
   - Forms (3 variants: default, compact, inline)
   - Modals (3 variants: default, large, fullscreen)
   - Navigation (3 variants: horizontal, vertical, breadcrumb)

   Updated: December 15, 2025
   ============================================================================ */

/* ============================================================================
   BUTTON COMPONENT SYSTEM (6 variants)
   ============================================================================ */

/* Base button styling */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  font-family: var(--font-family-base);
  font-size: var(--font-size-base);
  font-weight: 500;
  line-height: 1.5;
  text-decoration: none;
  border: 2px solid transparent;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.25s ease;
  user-select: none;
  white-space: nowrap;
  vertical-align: middle;
  -webkit-appearance: none;
  appearance: none;
}

/* Disabled state */
.btn:disabled,
.btn[aria-disabled="true"] {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

/* Focus state for accessibility */
.btn:focus-visible {
  outline: 3px solid currentColor;
  outline-offset: 2px;
}

/* ===== BUTTON VARIANT 1: PRIMARY ===== */
.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
}

.btn-primary:hover:not(:disabled) {
  background-color: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(199, 58, 72, 0.25);
}

.btn-primary:active:not(:disabled) {
  transform: translateY(0);
  box-shadow: 0 2px 6px rgba(199, 58, 72, 0.2);
}

/* ===== BUTTON VARIANT 2: SECONDARY ===== */
.btn-secondary {
  background-color: var(--color-secondary);
  color: var(--color-white);
  border-color: var(--color-secondary);
}

.btn-secondary:hover:not(:disabled) {
  background-color: var(--color-secondary-dark);
  border-color: var(--color-secondary-dark);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
}

.btn-secondary:active:not(:disabled) {
  transform: translateY(0);
  box-shadow: 0 2px 6px rgba(37, 99, 235, 0.2);
}

/* ===== BUTTON VARIANT 3: SUCCESS ===== */
.btn-success {
  background-color: var(--color-success);
  color: var(--color-white);
  border-color: var(--color-success);
}

.btn-success:hover:not(:disabled) {
  background-color: var(--color-success-dark);
  border-color: var(--color-success-dark);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(16, 185, 129, 0.25);
}

.btn-success:active:not(:disabled) {
  transform: translateY(0);
  box-shadow: 0 2px 6px rgba(16, 185, 129, 0.2);
}

/* ===== BUTTON VARIANT 4: WARNING ===== */
.btn-warning {
  background-color: var(--color-warning);
  color: var(--color-black);
  border-color: var(--color-warning);
}

.btn-warning:hover:not(:disabled) {
  background-color: var(--color-warning-dark);
  border-color: var(--color-warning-dark);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(245, 158, 11, 0.25);
}

.btn-warning:active:not(:disabled) {
  transform: translateY(0);
  box-shadow: 0 2px 6px rgba(245, 158, 11, 0.2);
}

/* ===== BUTTON VARIANT 5: DANGER ===== */
.btn-danger {
  background-color: var(--color-error);
  color: var(--color-white);
  border-color: var(--color-error);
}

.btn-danger:hover:not(:disabled) {
  background-color: var(--color-error-dark);
  border-color: var(--color-error-dark);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(225, 29, 72, 0.25);
}

.btn-danger:active:not(:disabled) {
  transform: translateY(0);
  box-shadow: 0 2px 6px rgba(225, 29, 72, 0.2);
}

/* ===== BUTTON VARIANT 6: GHOST (Outlined) ===== */
.btn-ghost {
  background-color: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
  border-width: 2px;
}

.btn-ghost:hover:not(:disabled) {
  background-color: rgba(199, 58, 72, 0.08);
  border-color: var(--color-primary-dark);
  color: var(--color-primary-dark);
}

.btn-ghost:active:not(:disabled) {
  background-color: rgba(199, 58, 72, 0.12);
}

/* ===== BUTTON SIZE: SMALL ===== */
.btn-sm {
  padding: var(--space-2) var(--space-3);
  font-size: 0.875rem;
  border-radius: 4px;
}

/* ===== BUTTON SIZE: MEDIUM (default) ===== */
.btn-md {
  padding: var(--space-3) var(--space-4);
  font-size: var(--font-size-base);
}

/* ===== BUTTON SIZE: LARGE ===== */
.btn-lg {
  padding: var(--space-4) var(--space-6);
  font-size: 1.125rem;
  border-radius: 8px;
  min-height: 48px;
}

/* ===== BUTTON BLOCK (Full-width) ===== */
.btn-block {
  display: flex;
  width: 100%;
}

/* ============================================================================
   CARD COMPONENT SYSTEM (4 variants)
   ============================================================================ */

/* Base card styling */
.card {
  background-color: var(--color-bg-primary);
  border: 1px solid var(--color-border-light);
  border-radius: 8px;
  padding: var(--space-4);
  overflow: hidden;
  transition: all 0.3s ease;
}

/* ===== CARD VARIANT 1: DEFAULT (Elevated) ===== */
.card-default {
  border: 1px solid var(--color-border-light);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.card-default:hover {
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.12);
  transform: translateY(-2px);
}

/* ===== CARD VARIANT 2: ELEVATED ===== */
.card-elevated {
  border: none;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
}

.card-elevated:hover {
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.16);
  transform: translateY(-4px);
}

/* ===== CARD VARIANT 3: OUTLINE ===== */
.card-outline {
  border: 2px solid var(--color-border);
  box-shadow: none;
}

.card-outline:hover {
  border-color: var(--color-primary);
  box-shadow: 0 2px 8px rgba(199, 58, 72, 0.1);
}

/* ===== CARD VARIANT 4: MINIMAL ===== */
.card-minimal {
  border: none;
  box-shadow: none;
  border-bottom: 2px solid var(--color-border-light);
}

.card-minimal:hover {
  border-bottom-color: var(--color-primary);
}

/* Card subcomponents */
.card-header {
  padding: var(--space-4) var(--space-4) var(--space-3);
  border-bottom: 1px solid var(--color-border-light);
}

.card-title {
  margin: 0;
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-text-primary);
}

.card-subtitle {
  margin: var(--space-1) 0 0;
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

.card-body {
  padding: var(--space-4);
  color: var(--color-text-primary);
}

.card-footer {
  padding: var(--space-3) var(--space-4) var(--space-4);
  border-top: 1px solid var(--color-border-light);
  background-color: var(--color-bg-secondary);
  display: flex;
  gap: var(--space-2);
  justify-content: flex-end;
}

/* ============================================================================
   FORM COMPONENT SYSTEM (3 variants)
   ============================================================================ */

/* Base form group styling */
.form-group {
  margin-bottom: var(--space-4);
  display: flex;
  flex-direction: column;
}

.form-group--error {
  color: var(--color-error);
}

/* ===== FORM VARIANT 1: DEFAULT ===== */
.form-group-default {
  margin-bottom: var(--space-4);
}

/* ===== FORM VARIANT 2: COMPACT ===== */
.form-group-compact {
  margin-bottom: var(--space-2);
}

.form-group-compact .form-label {
  margin-bottom: var(--space-1);
  font-size: 0.875rem;
}

.form-group-compact .form-control {
  padding: var(--space-2) var(--space-2);
  font-size: 0.875rem;
}

/* ===== FORM VARIANT 3: INLINE ===== */
.form-group-inline {
  flex-direction: row;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-2);
}

.form-group-inline .form-label {
  margin-bottom: 0;
  min-width: 120px;
  font-weight: 500;
}

/* Form label styling */
.form-label {
  display: block;
  margin-bottom: var(--space-2);
  font-weight: 500;
  font-size: var(--font-size-base);
  color: var(--color-text-primary);
  line-height: 1.5;
}

.form-label .required {
  color: var(--color-error);
  margin-left: var(--space-1);
  aria-label: "required";
}

/* Form control (input, textarea, select) */
.form-control {
  width: 100%;
  padding: var(--space-3) var(--space-3);
  font-family: var(--font-family-base);
  font-size: var(--font-size-base);
  line-height: 1.5;
  color: var(--color-text-primary);
  background-color: var(--color-bg-primary);
  border: 2px solid var(--color-border);
  border-radius: 6px;
  transition: all 0.25s ease;
  box-sizing: border-box;
}

.form-control:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(199, 58, 72, 0.1);
}

.form-control:disabled {
  background-color: var(--color-bg-tertiary);
  color: var(--color-text-muted);
  cursor: not-allowed;
}

.form-group--error .form-control {
  border-color: var(--color-error);
  background-color: rgba(225, 29, 72, 0.02);
}

.form-group--error .form-control:focus {
  box-shadow: 0 0 0 3px rgba(225, 29, 72, 0.1);
}

/* Form checkbox and radio */
.form-check {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.form-check-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.form-check-input {
  width: 20px;
  height: 20px;
  margin: 0;
  cursor: pointer;
  accent-color: var(--color-primary);
}

.form-check-input:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
}

.form-check-label {
  cursor: pointer;
  color: var(--color-text-primary);
  margin: 0;
}

/* Form help text */
.form-text {
  display: block;
  margin-top: var(--space-1);
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  line-height: 1.4;
}

.text-muted {
  color: var(--color-text-muted);
}

/* Form error feedback */
.invalid-feedback,
.valid-feedback {
  display: none;
  margin-top: var(--space-1);
  font-size: 0.875rem;
  line-height: 1.4;
  animation: slideDown 0.2s ease;
}

.invalid-feedback {
  color: var(--color-error);
}

.valid-feedback {
  color: var(--color-success);
}

/* Show when sibling input has validation class */
.is-invalid ~ .invalid-feedback,
.was-validated :invalid ~ .invalid-feedback {
  display: block;
}

.is-valid ~ .valid-feedback,
.was-validated :valid ~ .valid-feedback {
  display: block;
}

.form-control.is-invalid {
  border-color: var(--color-error);
}

.form-control.is-valid {
  border-color: var(--color-success);
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ============================================================================
   MODAL COMPONENT SYSTEM (3 variants)
   ============================================================================ */

/* Base modal styling */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: 1000;
  overflow-y: auto;
  animation: fadeIn 0.25s ease;
}

.modal.shown {
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal.hidden {
  display: none;
}

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

/* Modal content wrapper */
.modal-content {
  background-color: var(--color-bg-primary);
  border-radius: 8px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
  max-width: 500px;
  width: 90%;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  animation: slideUp 0.25s ease;
}

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

/* ===== MODAL VARIANT 1: DEFAULT ===== */
.modal-default .modal-content {
  max-width: 500px;
}

/* ===== MODAL VARIANT 2: LARGE ===== */
.modal-large .modal-content {
  max-width: 800px;
}

/* ===== MODAL VARIANT 3: FULLSCREEN ===== */
.modal-fullscreen .modal-content {
  max-width: 95vw;
  max-height: 95vh;
  width: 95vw;
  height: 95vh;
}

/* Modal header */
.modal-header {
  padding: var(--space-4);
  border-bottom: 1px solid var(--color-border-light);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
}

.modal-header h2,
.modal-header h3 {
  margin: 0;
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-text-primary);
}

/* Modal body */
.modal-body {
  padding: var(--space-4);
  overflow-y: auto;
  flex: 1;
  color: var(--color-text-primary);
}

/* Modal footer */
.modal-footer {
  padding: var(--space-4);
  border-top: 1px solid var(--color-border-light);
  background-color: var(--color-bg-secondary);
  display: flex;
  gap: var(--space-2);
  justify-content: flex-end;
}

/* Modal actions / buttons container */
.modal-actions {
  display: flex;
  gap: var(--space-2);
  justify-content: flex-end;
}

/* Close button in modal */
.modal-close {
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0;
  color: var(--color-text-secondary);
  transition: color 0.25s ease;
  min-width: 32px;
  min-height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
}

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

.modal-close:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
}

/* ============================================================================
   NAVIGATION COMPONENT SYSTEM (3 variants)
   ============================================================================ */

/* Base navigation styling */
.nav {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
}

/* ===== NAV VARIANT 1: HORIZONTAL ===== */
.nav-horizontal {
  flex-direction: row;
  gap: var(--space-2);
  align-items: center;
}

.nav-horizontal .nav-item {
  margin: 0;
}

.nav-horizontal .nav-link {
  padding: var(--space-2) var(--space-3);
  color: var(--color-text-primary);
  text-decoration: none;
  border-radius: 4px;
  transition: all 0.25s ease;
  display: inline-block;
  font-weight: 500;
}

.nav-horizontal .nav-link:hover {
  background-color: var(--color-bg-tertiary);
  color: var(--color-primary);
}

.nav-horizontal .nav-link.active {
  color: var(--color-primary);
  border-bottom: 3px solid var(--color-primary);
  background-color: transparent;
}

/* ===== NAV VARIANT 2: VERTICAL ===== */
.nav-vertical {
  flex-direction: column;
  gap: 0;
  width: 100%;
}

.nav-vertical .nav-item {
  margin: 0;
  border-bottom: 1px solid var(--color-border-light);
}

.nav-vertical .nav-link {
  padding: var(--space-3) var(--space-4);
  color: var(--color-text-primary);
  text-decoration: none;
  display: block;
  transition: all 0.25s ease;
  border-left: 3px solid transparent;
}

.nav-vertical .nav-link:hover {
  background-color: var(--color-bg-tertiary);
  color: var(--color-primary);
}

.nav-vertical .nav-link.active {
  background-color: rgba(199, 58, 72, 0.08);
  border-left-color: var(--color-primary);
  color: var(--color-primary);
  font-weight: 600;
}

/* ===== NAV VARIANT 3: BREADCRUMB ===== */
.nav-breadcrumb {
  flex-direction: row;
  gap: var(--space-1);
  align-items: center;
  padding: var(--space-2) 0;
  font-size: 0.9rem;
}

.nav-breadcrumb .nav-item {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.nav-breadcrumb .nav-item::after {
  content: '/';
  color: var(--color-text-muted);
  margin-left: var(--space-1);
}

.nav-breadcrumb .nav-item:last-child::after {
  display: none;
}

.nav-breadcrumb .nav-link {
  color: var(--color-secondary);
  text-decoration: none;
  transition: color 0.25s ease;
  padding: 0;
}

.nav-breadcrumb .nav-link:hover {
  color: var(--color-secondary-dark);
  text-decoration: underline;
}

.nav-breadcrumb .nav-link.active {
  color: var(--color-text-primary);
  pointer-events: none;
  cursor: default;
  font-weight: 500;
}

/* ============================================================================
   RESPONSIVE ADJUSTMENTS
   ============================================================================ */

@media (max-width: 768px) {
  /* Buttons - larger touch targets on mobile */
  .btn {
    min-height: 44px;
    padding: var(--space-3) var(--space-4);
  }

  .btn-sm {
    min-height: 40px;
  }

  .btn-lg {
    min-height: 52px;
  }

  /* Forms - larger inputs on mobile */
  .form-control {
    min-height: 44px;
    padding: var(--space-3) var(--space-3);
  }

  /* Modals - adjust for smaller screens */
  .modal-content {
    width: 95%;
    max-width: 90vw;
  }

  .modal-large .modal-content {
    max-width: 90vw;
  }

  /* Navigation - adjust for mobile */
  .nav-horizontal {
    flex-direction: column;
  }

  .nav-horizontal .nav-link {
    width: 100%;
  }
}

/* ============================================================================
   ACCESSIBILITY ENHANCEMENTS
   ============================================================================ */

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
  .btn,
  .card,
  .form-control,
  .modal,
  .nav-link {
    transition: none;
    animation: none;
  }

  .btn:hover {
    transform: none;
  }

  .card:hover {
    transform: none;
  }
}

/* High contrast mode support */
@media (prefers-contrast: more) {
  .btn,
  .card,
  .form-control {
    border-width: 2px;
  }

  .btn-ghost {
    border-width: 3px;
  }

  .form-control:focus {
    outline: 3px solid;
    outline-offset: 2px;
  }
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
  .card-default,
  .card-elevated,
  .card-outline {
    background-color: #1a1a2e;
    color: #e7ecff;
  }

  .card-default {
    border-color: #263157;
  }

  .card-outline {
    border-color: #263157;
  }

  .card-header {
    border-bottom-color: #263157;
  }

  .card-footer {
    border-top-color: #263157;
    background-color: #0d1533;
  }

  .form-control {
    background-color: #0d1533;
    border-color: #263157;
    color: #e7ecff;
  }

  .form-control:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(199, 58, 72, 0.2);
  }

  .form-label {
    color: #e7ecff;
  }

  .form-text,
  .text-muted {
    color: #9fb1ff;
  }

  .modal-content {
    background-color: #0d1533;
    color: #e7ecff;
  }

  .modal-header,
  .modal-footer {
    border-color: #263157;
    background-color: #0d1533;
  }

  .modal {
    background-color: rgba(0, 0, 0, 0.7);
  }

  .nav-horizontal .nav-link {
    color: #e7ecff;
  }

  .nav-vertical .nav-link {
    color: #e7ecff;
    border-bottom-color: #263157;
  }

  .nav-vertical .nav-link.active {
    background-color: rgba(199, 58, 72, 0.15);
  }
}

/* ============================================================================
   UTILITY COMBINATIONS
   ============================================================================ */

/* Button combinations */
.btn-group {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}

/* Card combinations */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-4);
}

/* Form combinations */
.form-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-4);
}

/* Modal overlay management */
body.modal-open {
  overflow: hidden;
}