/* Shared Button Component (light/dark, theme-aware)
   Path: /frontend/features/shared/buttons.css
   Uses design tokens with fallbacks for different feature scopes.
*/

/* Base button */
.btn {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 36px;
  padding: 0 var(--space-md);
  border-radius: 10px;
  font-size: var(--font-size-sm);
  font-weight: 500;
  font-family: var(
    --font-sans,
    "Roboto",
    ui-sans-serif,
    system-ui,
    -apple-system,
    "Segoe UI",
    "Helvetica Neue",
    Arial,
    "Noto Sans",
    sans-serif
  );
  line-height: 1;
  border: 1px solid var(--border, var(--tm-border, #e5e7eb));
  background: var(--panel, var(--tm-panel, #ffffff));
  color: var(--text, var(--tm-text, #111827));
  cursor: pointer;
  transition:
    transform 0.12s ease,
    box-shadow 0.2s ease,
    background 0.2s ease,
    border-color 0.2s ease,
    color 0.2s ease;
}

/* Hover/focus/disabled */
.btn:hover {
  background: var(--hover, var(--tm-hover, #f3f4f6));
}
.btn:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px
    color-mix(in oklab, var(--accent, var(--tm-accent, #4da3ff)) 35%, white);
}
.btn:disabled,
.btn[disabled] {
  opacity: 0.6;
  cursor: not-allowed;
  box-shadow: none;
  transform: none;
}

/* Sizes */
.btn.btn-sm {
  height: 30px;
  padding: 0 10px;
  font-size: 12px;
  border-radius: 8px;
}
.btn.btn-lg {
  height: 42px;
  padding: 0 18px;
  font-size: 15px;
  border-radius: 12px;
}

/* Primary CTA */
.btn-primary,
.btn.btn--primary {
  background: linear-gradient(
    135deg,
    color-mix(in oklab, var(--accent, var(--tm-accent, #4da3ff)) 70%, black),
    color-mix(in oklab, var(--accent, var(--tm-accent, #4da3ff)) 88%, black)
  );
  color: #fff;
  border-color: var(--accent, var(--tm-accent, #4da3ff));
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.12);
}
.btn-primary:hover,
.btn.btn--primary:hover {
  background: linear-gradient(
    135deg,
    color-mix(in oklab, var(--accent, var(--tm-accent, #4da3ff)) 78%, black),
    color-mix(in oklab, var(--accent, var(--tm-accent, #4da3ff)) 95%, black)
  );
  border-color: var(--accent-hover, var(--tm-accent-hover, #60a5fa));
  transform: translateY(-1px);
  box-shadow: 0 10px 22px rgba(0, 0, 0, 0.18);
}
.btn-primary:active,
.btn.btn--primary:active {
  transform: translateY(0);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.12);
}

/* Secondary */
.btn-secondary,
.btn.btn--secondary {
  background: var(--panel, var(--tm-panel, #ffffff));
  color: var(--text, var(--tm-text, #111827));
  border-color: var(--border, var(--tm-border, #e5e7eb));
}
.btn-secondary:hover,
.btn.btn--secondary:hover {
  background: var(--hover, var(--tm-hover, #f3f4f6));
}

/* Ghost */
.btn-ghost,
.btn.btn--ghost {
  background: transparent;
  border-color: transparent;
  color: var(--text, var(--tm-text, #111827));
}
.btn-ghost:hover,
.btn.btn--ghost:hover {
  background: var(--hover, var(--tm-hover, #f3f4f6));
  border-color: var(--border, var(--tm-border, #e5e7eb));
}

/* Danger */
.btn-danger,
.btn.btn--danger {
  background: var(--danger, var(--tm-danger, #ef4444));
  color: #fff;
  border-color: var(--danger, var(--tm-danger, #ef4444));
  box-shadow: 0 6px 16px rgba(239, 68, 68, 0.18);
}
.btn-danger:hover,
.btn.btn--danger:hover {
  background: color-mix(
    in oklab,
    var(--danger, var(--tm-danger, #ef4444)) 85%,
    black
  );
  border-color: color-mix(
    in oklab,
    var(--danger, var(--tm-danger, #ef4444)) 85%,
    black
  );
  transform: translateY(-1px);
}

/* Outline */
.btn-outline,
.btn.btn--outline {
  background: transparent;
  color: var(--text, var(--tm-text, #111827));
  border-color: var(--border, var(--tm-border, #e5e7eb));
}
.btn-outline:hover,
.btn.btn--outline:hover {
  background: var(--hover, var(--tm-hover, #f3f4f6));
}

/* Icon spacing */
.btn i {
  display: inline-flex;
  align-items: center;
  line-height: 1;
  pointer-events: none;
}
.btn i:first-child {
  margin-right: 8px;
}
.btn i:last-child {
  margin-left: 8px;
}

/* Loading state */
.btn.is-loading {
  position: relative;
  pointer-events: none;
  opacity: 0.8;
}
.btn.is-loading::after {
  content: "";
  width: var(--space-md);
  height: var(--space-md);
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, 0.8);
  border-top-color: transparent;
  animation: shared-btn-spin 0.8s linear infinite;
}
@keyframes shared-btn-spin {
  to {
    transform: rotate(360deg);
  }
}

/* === Feature-Specific Button Enhancements === */
/* Enhanced button styling for specific features (admin, workitemmanager, login, platform) */
body.feature-admin .btn,
body.feature-workitemmanager .btn,
body.feature-login .btn,
body.feature-platform .btn {
  background: linear-gradient(180deg, #1c2433, #171e2b);
  color: #e6eaf2;
  border: 1px solid var(--border);
  padding: 8px 12px;
  border-radius: var(--radius-xs);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

body.feature-admin .btn:hover,
body.feature-workitemmanager .btn:hover,
body.feature-login .btn:hover,
body.feature-platform .btn:hover {
  border-color: #3a465c;
  background: linear-gradient(180deg, #1e2637, #19212f);
}

body.feature-admin .btn:active,
body.feature-workitemmanager .btn:active,
body.feature-login .btn:active,
body.feature-platform .btn:active {
  transform: translateY(1px);
}

body.feature-admin .btn:focus,
body.feature-workitemmanager .btn:focus,
body.feature-login .btn:focus,
body.feature-platform .btn:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

.btn.active,
body.feature-admin .btn.selected,
body.feature-workitemmanager .btn.selected,
body.feature-login .btn.selected,
body.feature-platform .btn.selected {
  background: linear-gradient(180deg, var(--accent), #3a8bdf);
  color: #ffffff;
  border-color: var(--accent);
  box-shadow: 0 0 0 1px rgba(77, 163, 255, 0.3);
}

body.feature-admin .btn.ghost,
body.feature-workitemmanager .btn.ghost,
body.feature-login .btn.ghost,
body.feature-platform .btn.ghost {
  background: transparent;
}

body.feature-admin .btn.small,
body.feature-workitemmanager .btn.small,
body.feature-login .btn.small,
body.feature-platform .btn.small {
  padding: 6px 8px;
  border-radius: 7px;
}

body.feature-admin .btn.tiny,
body.feature-workitemmanager .btn.tiny,
body.feature-login .btn.tiny,
body.feature-platform .btn.tiny {
  padding: 4px 6px;
  border-radius: 6px;
  font-size: 12px;
}

body.feature-admin .btn.tiny:hover,
body.feature-workitemmanager .btn.tiny:hover,
body.feature-login .btn.tiny:hover,
body.feature-platform .btn.tiny:hover {
  background: linear-gradient(180deg, #1e2637, #19212f);
  border-color: #3a465c;
}

.btn.tiny.active,
body.feature-admin .btn.tiny.selected,
body.feature-workitemmanager .btn.tiny.selected,
body.feature-login .btn.tiny.selected,
body.feature-platform .btn.tiny.selected {
  background: var(--accent);
  color: #ffffff;
  border-color: var(--accent);
}

/* === Feature-Specific Danger Button Styling === */
body.feature-admin .btn.danger,
body.feature-workitemmanager .btn.danger,
body.feature-login .btn.danger,
body.feature-platform .btn.danger {
  color: #fff;
  border-color: #6a2e2e;
  background: linear-gradient(180deg, #6d1d28, #471219);
}

/* === Feature-Specific Disabled Button Styling === */
body.feature-admin .btn[disabled],
body.feature-workitemmanager .btn[disabled],
body.feature-login .btn[disabled],
body.feature-platform .btn[disabled] {
  opacity: 0.5;
  cursor: not-allowed;
}

/* === Editor Toolbar Button Styling === */
body.feature-admin .editor-toolbar .btn,
body.feature-workitemmanager .editor-toolbar .btn,
body.feature-login .editor-toolbar .btn,
body.feature-platform .editor-toolbar .btn {
  background: var(--panel-2) !important;
  color: var(--text) !important;
  border-color: var(--border) !important;
  height: 30px;
  padding: 0 10px;
  border-radius: 8px;
}

body.feature-admin .editor-toolbar .btn:hover,
body.feature-workitemmanager .editor-toolbar .btn:hover,
body.feature-login .editor-toolbar .btn:hover,
body.feature-platform .editor-toolbar .btn:hover {
  background: var(--hover) !important;
  border-color: var(--border-light) !important;
}

body.feature-admin .editor-toolbar .btn.active,
body.feature-workitemmanager .editor-toolbar .btn.active,
body.feature-login .editor-toolbar .btn.active,
body.feature-platform .editor-toolbar .btn.active {
  background: var(--active) !important;
  border-color: var(--accent) !important;
}

/* === Color Picker Button Styling === */
/* Color picker button styling - follow toolbar background */
body.feature-admin #btnTextColor,
body.feature-workitemmanager #btnTextColor,
body.feature-login #btnTextColor,
body.feature-platform #btnTextColor {
  position: relative;
  background: var(--panel-2);
  border: 1px solid var(--border);
}

body.feature-admin #btnTextColor:hover,
body.feature-workitemmanager #btnTextColor:hover,
body.feature-login #btnTextColor:hover,
body.feature-platform #btnTextColor:hover {
  background: var(--hover);
  border-color: var(--border-light);
}

body.feature-admin #btnTextColor::after,
body.feature-workitemmanager #btnTextColor::after,
body.feature-login #btnTextColor::after,
body.feature-platform #btnTextColor::after {
  content: "";
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%);
  width: 12px;
  height: 3px;
  background: var(--current-color, #4da3ff);
  border-radius: 1px;
  transition: background 0.2s ease;
}

/* === Toolbar Separator === */
body.feature-admin .sep,
body.feature-workitemmanager .sep,
body.feature-login .sep,
body.feature-platform .sep {
  width: 1px;
  height: 20px;
  background: var(--border);
  margin: 0 2px;
}

/* === Bulk Operations Button Styling === */
body.feature-admin .bulk-operations-bar .btn,
body.feature-workitemmanager .bulk-operations-bar .btn,
body.feature-login .bulk-operations-bar .btn,
body.feature-platform .bulk-operations-bar .btn {
  padding: 6px 12px;
  font-size: 12px;
}

body.feature-admin .bulk-operations-bar .btn.danger,
body.feature-workitemmanager .bulk-operations-bar .btn.danger,
body.feature-login .bulk-operations-bar .btn.danger,
body.feature-platform .bulk-operations-bar .btn.danger {
  background: var(--danger, #ff5656);
  color: white;
  border-color: var(--danger, #ff5656);
}

body.feature-admin .bulk-operations-bar .btn.danger:hover,
body.feature-workitemmanager .bulk-operations-bar .btn.danger:hover,
body.feature-login .bulk-operations-bar .btn.danger:hover,
body.feature-platform .bulk-operations-bar .btn.danger:hover {
  background: #ff4444;
}