/* ==========================================================================
   Reusable UI Component Styles
   All color/spacing/radius values use var(--xxx) from variables.css
   — zero hardcoded values — to enable one-file theme switching.
   Requirements: 15.2, 6.4, 14.4
   ========================================================================== */

/* ==========================================================================
   Buttons — .btn
   Variants: primary (default), secondary, destructive, ghost
   States: disabled, loading
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: var(--font-weight-medium);
  line-height: var(--leading-normal);
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: var(--transition-colors);
  text-decoration: none;
  white-space: nowrap;
}

/* Primary (default) */
.btn,
.btn--primary {
  background-color: var(--color-primary);
  color: var(--color-primary-foreground);
}

.btn:hover,
.btn--primary:hover {
  background-color: var(--color-primary-hover);
}

/* Secondary */
.btn--secondary {
  background-color: var(--color-secondary);
  color: var(--color-secondary-foreground);
}

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

/* Destructive */
.btn--destructive {
  background-color: var(--color-destructive);
  color: var(--color-destructive-foreground);
}

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

/* Ghost */
.btn--ghost {
  background-color: transparent;
  color: var(--color-foreground);
}

.btn--ghost:hover {
  background-color: var(--color-accent);
}

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

/* Loading state — spinner via border animation */
.btn--loading {
  position: relative;
  color: transparent;
  pointer-events: none;
}

.btn--loading::after {
  content: "";
  position: absolute;
  width: var(--space-4);
  height: var(--space-4);
  border: 2px solid var(--color-primary-foreground);
  border-top-color: transparent;
  border-radius: var(--radius-full);
  animation: btn-spin var(--duration-slow) linear infinite;
}

.btn--loading.btn--secondary::after,
.btn--loading.btn--ghost::after {
  border-color: var(--color-foreground);
  border-top-color: transparent;
}

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

/* Small button variant */
.btn--sm {
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
}

/* Outline */
.btn--outline {
  background-color: transparent;
  color: var(--color-foreground);
  border: 1px solid var(--color-border);
}

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

/* ==========================================================================
   Card — .card
   ========================================================================== */
.card {
  background-color: var(--color-card);
  color: var(--color-card-foreground);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: var(--space-6);
}

.card--hoverable {
  transition: var(--transition-shadow), var(--transition-transform);
}

.card--hoverable:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

/* ==========================================================================
   Badge — .badge
   Status: active, testing, inactive
   Role: owner, manager, member
   Delegation type: full, readonly, expired
   ========================================================================== */
.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-2);
  font-size: var(--text-xs);
  font-weight: var(--font-weight-medium);
  line-height: var(--leading-tight);
  border-radius: var(--radius-full);
  white-space: nowrap;
}

/* Status badges */
.badge--active {
  background-color: var(--color-status-active-bg);
  color: var(--color-status-active);
}

.badge--testing {
  background-color: var(--color-status-testing-bg);
  color: var(--color-status-testing);
}

.badge--inactive {
  background-color: var(--color-status-inactive-bg);
  color: var(--color-status-inactive);
}

/* Role badges */
.badge--owner {
  background-color: var(--color-role-owner-bg);
  color: var(--color-role-owner);
}

.badge--manager {
  background-color: var(--color-role-manager-bg);
  color: var(--color-role-manager);
}

.badge--member {
  background-color: var(--color-role-member-bg);
  color: var(--color-role-member);
}

/* Outline badge (used for M2M indicator) */
.badge--outline {
  background-color: transparent;
  color: var(--color-muted-foreground);
  border: 1px solid var(--color-border-strong);
}

/* Delegation type badges */
.badge--full {
  background-color: var(--color-deleg-full-bg);
  color: var(--color-deleg-full);
}

.badge--readonly {
  background-color: var(--color-deleg-readonly-bg);
  color: var(--color-deleg-readonly);
}

.badge--expired {
  background-color: var(--color-deleg-expired-bg);
  color: var(--color-deleg-expired);
}

/* ==========================================================================
   Toast — .toast
   Container fixed top-right, slide-in / fade-out animation
   Variants: success, error, info
   ========================================================================== */
.toast-container {
  position: fixed;
  top: var(--space-4);
  right: var(--space-4);
  z-index: var(--z-toast);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  pointer-events: none;
}

.toast {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  min-width: 18rem;
  max-width: 24rem;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  background-color: var(--color-card);
  color: var(--color-card-foreground);
  box-shadow: var(--shadow-lg);
  font-size: var(--text-sm);
  pointer-events: auto;
  animation: toast-slide-in var(--duration-slow) ease forwards;
}

.toast--exiting {
  animation: toast-fade-out var(--duration-normal) ease forwards;
}

.toast--success {
  border-left: 3px solid var(--color-success);
}

.toast--error {
  border-left: 3px solid var(--color-error);
}

.toast--info {
  border-left: 3px solid var(--color-info);
}

.toast__icon {
  flex-shrink: 0;
  width: var(--space-5);
  height: var(--space-5);
}

.toast--success .toast__icon {
  color: var(--color-success);
}

.toast--error .toast__icon {
  color: var(--color-error);
}

.toast--info .toast__icon {
  color: var(--color-info);
}

.toast__content {
  flex: 1;
  min-width: 0;
}

.toast__title {
  font-weight: var(--font-weight-medium);
  margin-bottom: var(--space-1);
}

.toast__description {
  color: var(--color-muted-foreground);
  font-size: var(--text-xs);
}

@keyframes toast-slide-in {
  from {
    transform: translateX(100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

@keyframes toast-fade-out {
  from {
    opacity: 1;
  }
  to {
    opacity: 0;
    transform: translateY(-0.5rem);
  }
}

/* ==========================================================================
   Dialog — .dialog
   Uses native <dialog> element with backdrop overlay
   Variant: destructive (red confirm button)
   ========================================================================== */
.dialog {
  border: none;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  padding: var(--space-0);
  max-width: 32rem;
  width: 90%;
  background-color: var(--color-card);
  color: var(--color-card-foreground);
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  margin: 0;
}

.dialog::backdrop {
  background-color: rgba(0, 0, 0, 0.5);
}

.dialog__content {
  padding: var(--space-6);
}

.dialog__header {
  margin-bottom: var(--space-4);
}

.dialog__title {
  font-size: var(--text-lg);
  font-weight: var(--font-weight-semibold);
  line-height: var(--leading-tight);
  color: var(--color-foreground);
}

.dialog__description {
  margin-top: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-muted-foreground);
}

.dialog__body {
  margin-bottom: var(--space-6);
}

.dialog__footer {
  display: flex;
  justify-content: flex-end;
  gap: var(--space-3);
}

/* Destructive variant — confirm button is red */
.dialog--destructive .dialog__confirm-btn {
  background-color: var(--color-destructive);
  color: var(--color-destructive-foreground);
}

.dialog--destructive .dialog__confirm-btn:hover {
  background-color: var(--color-destructive-hover);
}

/* ==========================================================================
   Table — .table
   Responsive wrapper, header/cell styles, dimmed row variant
   ========================================================================== */
.table-wrapper {
  width: 100%;
  overflow-x: auto;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-sm);
}

.table th {
  padding: var(--space-3) var(--space-4);
  text-align: left;
  font-weight: var(--font-weight-medium);
  font-size: var(--text-xs);
  color: var(--color-muted-foreground);
  background-color: var(--color-neutral-50);
  border-bottom: 1px solid var(--color-border);
  white-space: nowrap;
}

.table td {
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-border);
  color: var(--color-foreground);
  vertical-align: middle;
}

.table tbody tr:last-child td {
  border-bottom: none;
}

.table tbody tr:hover {
  background-color: var(--color-neutral-50);
}

/* Dimmed row — for inactive/expired items */
.table__row--dimmed {
  opacity: 0.5;
}

/* ==========================================================================
   Skeleton — .skeleton
   Pulse animation for loading placeholders (card, table row)
   ========================================================================== */
.skeleton {
  background: linear-gradient(
    90deg,
    var(--color-neutral-200) 25%,
    var(--color-neutral-100) 50%,
    var(--color-neutral-200) 75%
  );
  background-size: 200% 100%;
  animation: skeleton-pulse var(--duration-slow) ease-in-out infinite;
  border-radius: var(--radius-md);
}

@keyframes skeleton-pulse {
  0% {
    background-position: 200% 0;
  }
  100% {
    background-position: -200% 0;
  }
}

/* Card skeleton */
.skeleton-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  padding: var(--space-6);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background-color: var(--color-card);
}

.skeleton-card__icon {
  width: var(--space-12);
  height: var(--space-12);
  border-radius: var(--radius-md);
}

.skeleton-card__title {
  height: var(--space-5);
  width: 60%;
}

.skeleton-card__text {
  height: var(--space-4);
  width: 80%;
}

.skeleton-card__text--short {
  height: var(--space-4);
  width: 40%;
}

/* Table row skeleton */
.skeleton-table {
  width: 100%;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.skeleton-table__row {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-border);
}

.skeleton-table__row:last-child {
  border-bottom: none;
}

.skeleton-table__cell {
  height: var(--space-4);
  border-radius: var(--radius-sm);
  flex: 1;
}

.skeleton-table__cell--narrow {
  flex: 0 0 var(--space-16);
}

/* ==========================================================================
   Form Group — .form-group, .form-label, .form-input, .form-error, .form-hint
   ========================================================================== */
.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  margin-bottom: var(--space-4);
}

.form-label {
  font-size: var(--text-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-foreground);
}

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

.form-input {
  display: block;
  width: 100%;
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  background-color: var(--color-input-background);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: var(--transition-colors), var(--transition-shadow);
}

.form-input:hover {
  border-color: var(--color-border-strong);
}

.form-input:focus {
  outline: none;
  border-color: var(--color-ring);
  box-shadow: 0 0 0 2px rgba(163, 163, 163, 0.25);
}

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

.form-input--error:focus,
.form-group--error .form-input:focus {
  border-color: var(--color-error);
  box-shadow: 0 0 0 2px rgba(212, 24, 61, 0.15);
}

.form-error {
  font-size: var(--text-xs);
  color: var(--color-error);
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.form-hint {
  font-size: var(--text-xs);
  color: var(--color-muted-foreground);
}

/* ==========================================================================
   Icon Uploader — .icon-uploader
   Drop zone + preview thumbnail area
   ========================================================================== */
.icon-uploader {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.icon-uploader__preview {
  width: var(--space-16);
  height: var(--space-16);
  border: 2px dashed var(--color-border-strong);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background-color: var(--color-neutral-50);
  flex-shrink: 0;
}

.icon-uploader__preview img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.icon-uploader__preview--empty {
  color: var(--color-muted-foreground);
}

.icon-uploader__preview--empty svg {
  width: var(--space-8);
  height: var(--space-8);
}

.icon-uploader__controls {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.icon-uploader__input {
  display: none;
}

.icon-uploader__hint {
  font-size: var(--text-xs);
  color: var(--color-muted-foreground);
}

/* ==========================================================================
   User Search — .user-search
   Input + dropdown list styles
   ========================================================================== */
.user-search {
  position: relative;
}

.user-search__input {
  display: block;
  width: 100%;
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  background-color: var(--color-input-background);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: var(--transition-colors), var(--transition-shadow);
}

.user-search__input:focus {
  outline: none;
  border-color: var(--color-ring);
  box-shadow: 0 0 0 2px rgba(163, 163, 163, 0.25);
}

.user-search__dropdown {
  position: absolute;
  top: 100%;
  left: var(--space-0);
  right: var(--space-0);
  margin-top: var(--space-1);
  max-height: 20rem;
  overflow-y: auto;
  background-color: var(--color-popover);
  color: var(--color-popover-foreground);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  z-index: var(--z-dropdown);
  display: none;
}

.user-search__dropdown--open {
  display: block;
}

.user-search__item {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding: var(--space-2) var(--space-3);
  cursor: pointer;
  transition: background-color var(--duration-fast) ease;
}

.user-search__item:hover {
  background-color: var(--color-accent);
}

.user-search__item-name {
  font-size: var(--text-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-foreground);
}

.user-search__item-detail {
  font-size: var(--text-xs);
  color: var(--color-muted-foreground);
}

.user-search__empty {
  padding: var(--space-3);
  text-align: center;
  font-size: var(--text-sm);
  color: var(--color-muted-foreground);
}

.user-search__loading {
  padding: var(--space-3);
  text-align: center;
  font-size: var(--text-sm);
  color: var(--color-muted-foreground);
}

/* ==========================================================================
   Empty State — .empty-state
   Centered icon + message
   ========================================================================== */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-12) var(--space-6);
  text-align: center;
}

.empty-state__icon {
  width: var(--space-12);
  height: var(--space-12);
  color: var(--color-muted-foreground);
  margin-bottom: var(--space-4);
}

.empty-state__title {
  font-size: var(--text-lg);
  font-weight: var(--font-weight-medium);
  color: var(--color-foreground);
  margin-bottom: var(--space-2);
}

.empty-state__message {
  font-size: var(--text-sm);
  color: var(--color-muted-foreground);
  max-width: 24rem;
}

/* ==========================================================================
   Warning Banner — .warning-banner
   Yellow background alert
   ========================================================================== */
.warning-banner {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background-color: var(--color-warning-light);
  border: 1px solid var(--color-warning-border);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  color: var(--color-foreground);
}

.warning-banner__icon {
  flex-shrink: 0;
  width: var(--space-5);
  height: var(--space-5);
  color: var(--color-warning);
}

.warning-banner__content {
  flex: 1;
  min-width: 0;
}

.warning-banner__title {
  font-weight: var(--font-weight-medium);
  margin-bottom: var(--space-1);
}

.warning-banner__message {
  color: var(--color-muted-foreground);
}


/* ==========================================================================
   Floating Panel — .panel
   Full-featured sub-window dialog for in-page navigation.
   Uses native <dialog> with .showModal() for backdrop + Escape handling.
   Sizes: medium (640px), large (960px), xlarge (1200px)
   ========================================================================== */
.panel {
  border: none;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  padding: var(--space-0);
  background-color: var(--color-page-bg);
  color: var(--color-foreground);
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  margin: 0;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  animation: panel-enter var(--duration-slow) ease;
}

.panel::backdrop {
  background-color: rgba(0, 0, 0, 0.4);
  animation: panel-backdrop-in var(--duration-normal) ease;
}

/* Size variants */
.panel--medium {
  width: min(640px, 92vw);
}

.panel--large {
  width: min(960px, 94vw);
}

.panel--xlarge {
  width: min(1200px, 96vw);
}

/* Chrome — header + body wrapper */
.panel__chrome {
  display: flex;
  flex-direction: column;
  max-height: 90vh;
  overflow: hidden;
}

/* Header bar */
.panel__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-3) var(--space-5);
  background-color: var(--color-card);
  border-bottom: 1px solid var(--color-border);
  flex-shrink: 0;
}

.panel__title {
  font-size: var(--text-base);
  font-weight: var(--font-weight-semibold);
  color: var(--color-foreground);
  margin: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.panel__close-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  border-radius: var(--radius-md);
  background-color: transparent;
  color: var(--color-muted-foreground);
  border: none;
  cursor: pointer;
  transition: var(--transition-colors);
  flex-shrink: 0;
  padding: 0;
}

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

/* Scrollable body */
.panel__body {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-5);
  -webkit-overflow-scrolling: touch;
}

/* Animations */
@keyframes panel-enter {
  from {
    opacity: 0;
    transform: translate(-50%, -48%);
  }
  to {
    opacity: 1;
    transform: translate(-50%, -50%);
  }
}

@keyframes panel-backdrop-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* Responsive — small screens: panel goes nearly full-screen */
@media (max-width: 767px) {
  .panel--medium,
  .panel--large,
  .panel--xlarge {
    width: 100vw;
    max-height: 100vh;
    border-radius: 0;
  }

  .panel__body {
    padding: var(--space-3);
  }
}