/* ==============================================
   ADVANCED FORM STYLES
   ============================================== */

/* Form Layout Variants */
.form-inline {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-base);
  align-items: flex-end;
}

.form-inline .form-group {
  flex: 1;
  min-width: 200px;
  margin-bottom: 0;
}

.form-inline label {
  display: inline-block;
  margin-bottom: 0;
  margin-right: var(--spacing-sm);
}

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

.form-row.cols-2 {
  grid-template-columns: repeat(2, 1fr);
}

.form-row.cols-3 {
  grid-template-columns: repeat(3, 1fr);
}

.form-row.cols-4 {
  grid-template-columns: repeat(4, 1fr);
}

@media (max-width: 768px) {
  .form-row,
  .form-row.cols-2,
  .form-row.cols-3,
  .form-row.cols-4 {
    grid-template-columns: 1fr;
  }
}

/* Input Group */
.input-group {
  display: flex;
  gap: 0;
  margin-bottom: var(--spacing-lg);
}

.input-group > .form-control {
  border-radius: var(--radius-md) 0 0 var(--radius-md);
  margin-right: -1px;
  flex: 1;
}

.input-group > .input-group-append {
  display: flex;
  align-items: center;
  gap: 0;
}

.input-group > .input-group-append .btn {
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.input-group > .input-group-append:last-child > * {
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.input-group-text {
  padding: var(--spacing-sm) var(--spacing-base);
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 0;
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
}

/* File Input */
.form-file {
  position: relative;
  display: inline-block;
  width: 100%;
}

.form-file input[type="file"] {
  position: absolute;
  left: -9999px;
}

.form-file-label {
  display: flex;
  align-items: center;
  padding: var(--spacing-base) var(--spacing-lg);
  border: 2px dashed var(--border-color);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: border-color var(--transition-fast), background-color var(--transition-fast);
  background-color: var(--bg-tertiary);
}

.form-file-label:hover {
  border-color: var(--color-primary);
  background-color: var(--color-primary-light);
}

.form-file-label .icon {
  margin-right: var(--spacing-base);
  font-size: var(--font-size-2xl);
}

/* Range Slider */
input[type="range"] {
  width: 100%;
  height: 6px;
  border-radius: 3px;
  background: var(--border-color);
  outline: none;
  -webkit-appearance: none;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--color-primary);
  cursor: pointer;
  box-shadow: var(--shadow-sm);
}

input[type="range"]::-moz-range-thumb {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--color-primary);
  cursor: pointer;
  border: none;
  box-shadow: var(--shadow-sm);
}

/* Switches */
.form-switch {
  display: flex;
  align-items: center;
  gap: var(--spacing-base);
  margin-bottom: var(--spacing-base);
}

.switch {
  position: relative;
  display: inline-block;
  width: 50px;
  height: 28px;
}

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

.switch-slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--color-gray-300);
  transition: background-color var(--transition-normal);
  border-radius: 28px;
}

.switch-slider:before {
  position: absolute;
  content: "";
  height: 22px;
  width: 22px;
  left: 3px;
  bottom: 3px;
  background-color: white;
  transition: transform var(--transition-normal);
  border-radius: 50%;
}

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

input:checked + .switch-slider:before {
  transform: translateX(22px);
}

/* Disabled State */
.form-group.disabled label {
  opacity: 0.6;
  cursor: not-allowed;
}

/* ==============================================
   ADVANCED TABLE STYLES
   ============================================== */

.table-responsive {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin-bottom: var(--spacing-lg);
}

.table-compact {
  font-size: var(--font-size-sm);
}

.table-compact th,
.table-compact td {
  padding: var(--spacing-sm) var(--spacing-base);
}

.table-bordered {
  border: 1px solid var(--border-color);
}

.table-bordered th,
.table-bordered td {
  border: 1px solid var(--border-color);
}

.table-striped tbody tr:nth-child(odd) {
  background-color: var(--bg-tertiary);
}

.table-hover tbody tr:hover {
  background-color: var(--bg-secondary);
}

.table-sm {
  font-size: var(--font-size-xs);
}

.table-sm th,
.table-sm td {
  padding: var(--spacing-xs) var(--spacing-sm);
}

/* Table Header Styles */
th {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
  font-weight: var(--font-weight-semibold);
  cursor: pointer;
  user-select: none;
  transition: background-color var(--transition-fast);
}

th:hover {
  background-color: var(--color-gray-200);
}

th.sortable::after {
  content: " ?";
  font-size: 0.8em;
  opacity: 0.5;
  margin-left: var(--spacing-xs);
}

th.sorted-asc::after {
  content: " ?";
  opacity: 1;
}

th.sorted-desc::after {
  content: " ?";
  opacity: 1;
}

/* ==============================================
   PAGINATION
   ============================================== */

.pagination {
  display: flex;
  list-style: none;
  gap: var(--spacing-xs);
  margin: var(--spacing-lg) 0;
  padding: 0;
}

.page-item {
  margin: 0;
}

.page-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  height: 40px;
  padding: var(--spacing-xs) var(--spacing-sm);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--color-primary);
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
}

.page-link:hover:not(.disabled):not(.active) {
  background-color: var(--bg-tertiary);
  border-color: var(--border-color-dark);
}

.page-item.active .page-link {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-white);
}

.page-item.disabled .page-link {
  opacity: 0.5;
  cursor: not-allowed;
}

/* ==============================================
   BREADCRUMBS
   ============================================== */

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  list-style: none;
  margin: 0;
  padding: 0;
  margin-bottom: var(--spacing-lg);
  font-size: var(--font-size-sm);
}

.breadcrumb-item {
  margin: 0;
}

.breadcrumb-item + .breadcrumb-item::before {
  content: "/";
  display: inline-block;
  margin: 0 var(--spacing-sm);
  color: var(--text-tertiary);
}

.breadcrumb-item a {
  color: var(--color-primary);
}

.breadcrumb-item a:hover {
  text-decoration: underline;
}

.breadcrumb-item.active {
  color: var(--text-secondary);
}

/* ==============================================
   TABS & NAVIGATION
   ============================================== */

.nav-tabs {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  border-bottom: 2px solid var(--border-color);
  gap: 0;
}

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

.nav-tabs .nav-link {
  color: var(--text-secondary);
  border: none;
  border-bottom: 3px solid transparent;
  border-radius: 0;
  margin-bottom: -2px;
  padding: var(--spacing-base) var(--spacing-lg);
}

.nav-tabs .nav-link:hover {
  border-bottom-color: var(--border-color-dark);
  color: var(--text-primary);
}

.nav-tabs .nav-link.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
  font-weight: var(--font-weight-semibold);
  background-color: transparent;
}

.tab-content {
  display: none;
  padding: var(--spacing-lg) 0;
}

.tab-content.active {
  display: block;
}

/* ==============================================
   DROPDOWNS/MENUS
   ============================================== */

.dropdown {
  position: relative;
  display: inline-block;
}

.dropdown-toggle {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: var(--spacing-sm) var(--spacing-base);
  transition: color var(--transition-fast);
}

.dropdown-toggle:hover {
  color: var(--text-primary);
}

.dropdown-toggle::after {
  content: "?";
  font-size: 0.7em;
  margin-left: var(--spacing-xs);
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  list-style: none;
  margin: var(--spacing-sm) 0 0 0;
  padding: var(--spacing-sm) 0;
  min-width: 200px;
  z-index: var(--z-dropdown);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: opacity var(--transition-normal), visibility var(--transition-normal), transform var(--transition-normal);
}

.dropdown.show .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-item {
  margin: 0;
  padding: var(--spacing-sm) var(--spacing-lg);
  color: var(--text-primary);
  text-decoration: none;
  cursor: pointer;
  transition: background-color var(--transition-fast), color var(--transition-fast);
  display: block;
  white-space: nowrap;
}

.dropdown-item:hover {
  background-color: var(--bg-tertiary);
  color: var(--color-primary);
}

.dropdown-item.active {
  background-color: var(--color-primary-light);
  color: var(--color-primary);
  font-weight: var(--font-weight-semibold);
}

.dropdown-divider {
  height: 1px;
  background-color: var(--border-color);
  margin: var(--spacing-sm) 0;
}

/* ==============================================
   SPINNERS/LOADERS
   ============================================== */

.spinner {
  display: inline-block;
  width: 40px;
  height: 40px;
  border: 4px solid var(--border-color);
  border-top: 4px solid var(--color-primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

.spinner-sm {
  width: 20px;
  height: 20px;
  border-width: 2px;
}

.spinner-lg {
  width: 60px;
  height: 60px;
  border-width: 5px;
}

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

.spinner-border {
  display: inline-block;
  vertical-align: text-bottom;
}

.spinner-grow {
  display: inline-block;
  width: 40px;
  height: 40px;
  background-color: var(--color-primary);
  border-radius: 50%;
  animation: grow 1.5s ease-in-out infinite;
}

@keyframes grow {
  0%, 100% { opacity: 0.3; }
  50% { opacity: 1; }
}

/* ==============================================
   PROGRESS BARS
   ============================================== */

.progress {
  display: flex;
  height: 25px;
  background-color: var(--bg-tertiary);
  border-radius: var(--radius-full);
  overflow: hidden;
  margin-bottom: var(--spacing-base);
}

.progress-bar {
  background-color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-white);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  transition: width var(--transition-normal);
}

.progress-bar.bg-success {
  background-color: var(--color-success);
}

.progress-bar.bg-danger {
  background-color: var(--color-danger);
}

.progress-bar.bg-warning {
  background-color: var(--color-warning);
}

.progress-bar.bg-info {
  background-color: var(--color-info);
}

.progress-bar.animated {
  animation: progress-bar-stripes 1s linear infinite;
  background-image: linear-gradient(
    45deg,
    rgba(255, 255, 255, 0.15) 25%,
    transparent 25%,
    transparent 50%,
    rgba(255, 255, 255, 0.15) 50%,
    rgba(255, 255, 255, 0.15) 75%,
    transparent 75%,
    transparent
  );
  background-size: 40px 40px;
}

@keyframes progress-bar-stripes {
  0% { background-position: 0 0; }
  100% { background-position: 40px 0; }
}

/* ==============================================
   TOOLTIPS & POPOVERS
   ============================================== */

.tooltip {
  position: absolute;
  background-color: var(--color-gray-900);
  color: var(--color-white);
  padding: var(--spacing-sm) var(--spacing-base);
  border-radius: var(--radius-md);
  font-size: var(--font-size-xs);
  white-space: nowrap;
  z-index: var(--z-tooltip);
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.tooltip.show {
  opacity: 1;
}

.tooltip-arrow {
  position: absolute;
  width: 5px;
  height: 5px;
  background-color: var(--color-gray-900);
}

.popover {
  position: absolute;
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: var(--spacing-base);
  z-index: var(--z-popover);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-normal), visibility var(--transition-normal);
}

.popover.show {
  opacity: 1;
  visibility: visible;
}

.popover-title {
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--spacing-sm);
  padding-bottom: var(--spacing-sm);
  border-bottom: 1px solid var(--border-color);
}

.popover-content {
  font-size: var(--font-size-sm);
}

/* ==============================================
   UTILITIES FOR COMMON PATTERNS
   ============================================== */

.text-truncate {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.text-break {
  word-break: break-word;
}

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

.text-decoration-none {
  text-decoration: none !important;
}

.text-decoration-underline {
  text-decoration: underline !important;
}

.d-block { display: block; }
.d-inline { display: inline; }
.d-inline-block { display: inline-block; }
.d-flex { display: flex; }
.d-grid { display: grid; }

.align-items-start { align-items: flex-start; }
.align-items-center { align-items: center; }
.align-items-end { align-items: flex-end; }

.justify-content-start { justify-content: flex-start; }
.justify-content-center { justify-content: center; }
.justify-content-end { justify-content: flex-end; }
.justify-content-between { justify-content: space-between; }

.w-100 { width: 100%; }
.h-100 { height: 100%; }

.max-w-none { max-width: none; }
.max-w-xs { max-width: 320px; }
.max-w-sm { max-width: 640px; }
.max-w-md { max-width: 768px; }
.max-w-lg { max-width: 1024px; }
.max-w-xl { max-width: 1280px; }
.max-w-2xl { max-width: 1536px; }