/* ============================================================
   Auto-Update-Toast (siehe app.js Bootstrap)
   ============================================================ */
.build-toast {
  position: fixed;
  z-index: 9999;
  right: 16px;
  bottom: calc(16px + env(safe-area-inset-bottom, 0px));
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 0.75rem 0.85rem 0.75rem 1rem;
  background: var(--color-surface);
  border: 1px solid var(--color-primary);
  border-radius: 14px;
  box-shadow:
    0 14px 36px -10px color-mix(in srgb, var(--color-primary) 50%, transparent),
    var(--shadow-lg);
  max-width: 420px;
  transform: translateY(20px) scale(0.96);
  opacity: 0;
  transition: opacity 250ms ease, transform 250ms ease;
}
.build-toast.is-visible {
  opacity: 1;
  transform: translateY(0) scale(1);
}
.build-toast__icon {
  font-size: 1.5rem;
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.2rem;
  height: 2.2rem;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-hover) 100%);
  color: var(--color-on-accent);
}
.build-toast__body {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  flex: 1;
  min-width: 0;
}
.build-toast__title {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.25;
}
.build-toast__sub {
  font-size: 0.78rem;
  color: var(--color-text-muted);
  line-height: 1.3;
}
.build-toast__btn {
  flex-shrink: 0;
  padding: 0.5rem 0.95rem;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-hover) 100%);
  color: var(--color-on-accent);
  border: none;
  border-radius: 8px;
  font: inherit;
  font-size: 0.85rem;
  font-weight: 700;
  cursor: pointer;
  transition: filter 150ms ease, transform 150ms ease;
  white-space: nowrap;
}
.build-toast__btn:hover:not(:disabled) {
  filter: brightness(1.1);
  transform: translateY(-1px);
}
.build-toast__btn:disabled {
  opacity: 0.6;
  cursor: wait;
}
.build-toast__close {
  flex-shrink: 0;
  width: 1.75rem;
  height: 1.75rem;
  padding: 0;
  background: transparent;
  border: none;
  color: var(--color-text-muted);
  font-size: 1.2rem;
  line-height: 1;
  cursor: pointer;
  border-radius: 50%;
  transition: background 150ms ease, color 150ms ease;
}
.build-toast__close:hover {
  background: var(--color-surface-hover);
  color: var(--color-text);
}
@media (max-width: 600px) {
  .build-toast {
    left: 12px;
    right: 12px;
    max-width: none;
    /* Über der Mobile-Bottom-Nav (~70px hoch) anheben */
    bottom: calc(82px + env(safe-area-inset-bottom, 0px));
  }
}
@media (prefers-reduced-motion: reduce) {
  .build-toast {
    transition: opacity 100ms;
    transform: none;
  }
}

/* ============================================================
   components.css
   Wiederverwendbare UI-Komponenten für die Prüfungs-App.
   Nutzt Tokens aus theme.css (Single source of truth).
   ============================================================ */


/* ------------------------------------------------------------
   BUTTONS
   ------------------------------------------------------------ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm, 0.5rem);
  padding: 0.6rem 1.2rem;
  min-height: 40px;
  font-family: inherit;
  font-size: var(--font-size-md, 1rem);
  font-weight: var(--font-weight-medium, 500);
  line-height: 1.25;
  text-align: center;
  text-decoration: none;
  white-space: nowrap;
  vertical-align: middle;
  cursor: pointer;
  user-select: none;
  border: 1px solid transparent;
  border-radius: 8px;
  background-color: var(--color-surface);
  color: var(--color-text);
  transition:
    background-color var(--transition-fast, 150ms) ease,
    border-color var(--transition-fast, 150ms) ease,
    color var(--transition-fast, 150ms) ease,
    box-shadow var(--transition-fast, 150ms) ease,
    transform var(--transition-fast, 150ms) ease;
}

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

.btn:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px var(--color-focus-ring);
}

.btn:active {
  transform: translateY(1px);
}

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

/* --- Varianten --- */
.btn--primary {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-on-accent);
}
.btn--primary:hover {
  background-color: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
}
.btn--primary:active {
  background-color: var(--color-primary-active);
  border-color: var(--color-primary-active);
}

.btn--secondary {
  background-color: var(--color-surface);
  border-color: var(--color-border);
  color: var(--color-text);
}
.btn--secondary:hover {
  background-color: var(--color-surface-hover);
  border-color: var(--color-border-hover);
}
.btn--secondary:active {
  background-color: var(--color-surface-active);
}

.btn--ghost {
  background-color: transparent;
  border-color: transparent;
  color: var(--color-text);
}
.btn--ghost:hover {
  background-color: var(--color-surface-hover);
}
.btn--ghost:active {
  background-color: var(--color-surface-active);
}

.btn--danger {
  background-color: var(--color-danger);
  border-color: var(--color-danger);
  color: var(--color-danger-contrast, #ffffff);
}
.btn--danger:hover {
  background-color: var(--color-danger-hover);
  border-color: var(--color-danger-hover);
}
.btn--danger:active {
  background-color: var(--color-danger-active);
  border-color: var(--color-danger-active);
}

/* --- Größen --- */
.btn--sm {
  padding: 0.4rem 0.8rem;
  min-height: 32px;
  font-size: var(--font-size-sm, 0.875rem);
  border-radius: 6px;
}

.btn--lg {
  padding: 0.75rem 1.5rem;
  min-height: 48px;
  font-size: var(--font-size-lg, 1.125rem);
  border-radius: 10px;
}

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

/* --- Button-Group --- */
.btn-group {
  display: inline-flex;
  align-items: stretch;
}
.btn-group .btn {
  border-radius: 0;
  margin-left: -1px;
}
.btn-group .btn:first-child {
  border-top-left-radius: 8px;
  border-bottom-left-radius: 8px;
  margin-left: 0;
}
.btn-group .btn:last-child {
  border-top-right-radius: 8px;
  border-bottom-right-radius: 8px;
}
.btn-group .btn:focus-visible,
.btn-group .btn:hover {
  z-index: 1;
}


/* ------------------------------------------------------------
   ICON-BUTTON (Header-Icons, Toolbars)
   ------------------------------------------------------------ */
.icon-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  padding: 0;
  background-color: transparent;
  color: var(--color-fg);
  border: none;
  border-radius: var(--radius-full, 9999px);
  cursor: pointer;
  text-decoration: none;
  transition:
    background-color var(--transition-fast, 150ms) ease,
    color var(--transition-fast, 150ms) ease,
    transform var(--transition-fast, 150ms) ease;
}

.icon-button:hover {
  background-color: var(--color-surface-hover);
}

.icon-button:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px var(--color-focus-ring);
}

.icon-button:active {
  background-color: var(--color-surface-active);
  transform: translateY(1px);
}

.icon-button:disabled,
.icon-button[aria-disabled="true"] {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

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

.icon-button--sm {
  width: 32px;
  height: 32px;
}
.icon-button--sm svg {
  width: 18px;
  height: 18px;
}

.icon-button--lg {
  width: 48px;
  height: 48px;
}
.icon-button--lg svg {
  width: 24px;
  height: 24px;
}


/* ------------------------------------------------------------
   CARDS
   ------------------------------------------------------------ */
.card {
  display: block;
  padding: 1.25rem;
  background-color: var(--color-surface);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  box-shadow: var(--shadow-sm);
  transition:
    box-shadow var(--transition-fast, 150ms) ease,
    transform var(--transition-fast, 150ms) ease,
    border-color var(--transition-fast, 150ms) ease,
    background-color var(--transition-fast, 150ms) ease;
}

.card--clickable {
  cursor: pointer;
  text-align: left;
  width: 100%;
  text-decoration: none;
  color: inherit;
}
.card--clickable:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
  border-color: var(--color-border-hover);
  text-decoration: none;
}
.card--clickable:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px var(--color-focus-ring), var(--shadow-md);
}
.card--clickable:active {
  transform: translateY(0);
  box-shadow: var(--shadow-sm);
}

.card--accent {
  border-left: 4px solid var(--color-primary);
}

.card--flat {
  box-shadow: none;
}

.card__title {
  font-size: var(--font-size-lg, 1.125rem);
  font-weight: var(--font-weight-semibold, 600);
  margin-bottom: var(--space-sm, 0.5rem);
  color: var(--color-fg);
}

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

.card__footer {
  margin-top: var(--space-md, 1rem);
  padding-top: var(--space-md, 1rem);
  border-top: 1px solid var(--color-border);
  display: flex;
  gap: var(--space-sm, 0.5rem);
  align-items: center;
}


/* ------------------------------------------------------------
   TAGS (Pill-Labels)
   ------------------------------------------------------------ */
.tag {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs, 0.25rem);
  padding: 0.25rem 0.6rem;
  font-size: 0.75rem;
  font-weight: var(--font-weight-medium, 500);
  line-height: 1.4;
  color: var(--color-text-muted);
  background-color: var(--color-surface-muted);
  border: 1px solid transparent;
  border-radius: var(--radius-full, 9999px);
  white-space: nowrap;
}

.tag--info {
  background-color: var(--color-info-bg);
  color: var(--color-info-text);
}

.tag--success {
  background-color: var(--color-success-bg);
  color: var(--color-success-text);
}

.tag--warning {
  background-color: var(--color-warning-bg);
  color: var(--color-warning-text);
}

.tag--danger {
  background-color: var(--color-danger-bg);
  color: var(--color-danger-text);
}


/* ------------------------------------------------------------
   BADGE (Zähler-Indikator)
   ------------------------------------------------------------ */
.badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 1.25rem;
  height: 1.25rem;
  padding: 0 0.375rem;
  font-size: var(--font-size-xs, 0.75rem);
  font-weight: var(--font-weight-bold, 700);
  line-height: 1;
  color: var(--color-danger-contrast, #ffffff);
  background-color: var(--color-danger);
  border-radius: var(--radius-full, 9999px);
}

.badge--primary {
  background-color: var(--color-primary);
  color: var(--color-on-accent);
}
.badge--success {
  background-color: var(--color-success);
  color: var(--color-on-accent);
}
.badge--warning {
  background-color: var(--color-warning);
  color: var(--color-on-accent);
}
.badge--muted {
  background-color: var(--color-surface-muted);
  color: var(--color-text-muted);
}


/* ------------------------------------------------------------
   PROGRESS BAR
   ------------------------------------------------------------ */
.progress-bar {
  position: relative;
  width: 100%;
  height: 0.5rem;
  background-color: var(--color-surface-muted);
  border-radius: var(--radius-full, 9999px);
  overflow: hidden;
}

.progress-bar__fill {
  display: block;
  height: 100%;
  width: 0%;
  background-color: var(--color-primary);
  border-radius: inherit;
  transition: width var(--transition-slow, 300ms) ease;
}

.progress-bar--success .progress-bar__fill { background-color: var(--color-success); }
.progress-bar--warning .progress-bar__fill { background-color: var(--color-warning); }
.progress-bar--danger  .progress-bar__fill { background-color: var(--color-danger);  }


/* ------------------------------------------------------------
   TOGGLE (iOS-Style Switch · 48x28)
   ------------------------------------------------------------ */
.toggle {
  position: relative;
  display: inline-block;
  width: 48px;
  height: 28px;
  flex-shrink: 0;
}
.toggle input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}
.toggle__slider {
  position: absolute;
  inset: 0;
  background-color: var(--color-surface-muted);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full, 9999px);
  cursor: pointer;
  transition:
    background-color var(--transition-fast, 150ms) ease,
    border-color var(--transition-fast, 150ms) ease;
}
.toggle__slider::before {
  content: "";
  position: absolute;
  top: 2px;
  left: 2px;
  width: 22px;
  height: 22px;
  background-color: var(--color-surface, #ffffff);
  border-radius: 50%;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast, 150ms) ease;
}
.toggle input:checked + .toggle__slider {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
}
.toggle input:checked + .toggle__slider::before {
  transform: translateX(20px);
}
.toggle input:focus-visible + .toggle__slider {
  box-shadow: 0 0 0 3px var(--color-focus-ring);
}
.toggle input:disabled + .toggle__slider {
  opacity: 0.5;
  cursor: not-allowed;
}


/* ------------------------------------------------------------
   FORM CONTROLS (Input, Textarea, Select)
   ------------------------------------------------------------ */
.form-control,
.input,
.textarea,
.select {
  display: block;
  width: 100%;
  padding: 0.6rem 0.875rem;
  min-height: 40px;
  font-family: inherit;
  font-size: var(--font-size-md, 1rem);
  line-height: 1.5;
  color: var(--color-text);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  transition:
    border-color var(--transition-fast, 150ms) ease,
    box-shadow var(--transition-fast, 150ms) ease,
    background-color var(--transition-fast, 150ms) ease;
  appearance: none;
  -webkit-appearance: none;
}

.input::placeholder,
.textarea::placeholder {
  color: var(--color-text-placeholder);
  opacity: 1;
}

.form-control:hover,
.input:hover,
.textarea:hover,
.select:hover {
  border-color: var(--color-border-hover);
}

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

.form-control:disabled,
.input:disabled,
.textarea:disabled,
.select:disabled {
  background-color: var(--color-surface-muted);
  opacity: 0.6;
  cursor: not-allowed;
}

.input[aria-invalid="true"],
.textarea[aria-invalid="true"],
.select[aria-invalid="true"] {
  border-color: var(--color-danger);
}
.input[aria-invalid="true"]:focus,
.textarea[aria-invalid="true"]:focus,
.select[aria-invalid="true"]:focus {
  box-shadow: 0 0 0 3px var(--color-danger-ring);
}

.textarea {
  min-height: 5rem;
  resize: vertical;
  line-height: var(--line-height-base, 1.5);
}

.select {
  padding-right: var(--space-xl, 2rem);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' fill='%236b7280'%3E%3Cpath fill-rule='evenodd' d='M5.23 7.21a.75.75 0 011.06.02L10 11.06l3.71-3.83a.75.75 0 111.08 1.04l-4.25 4.39a.75.75 0 01-1.08 0L5.21 8.27a.75.75 0 01.02-1.06z' clip-rule='evenodd'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.625rem center;
  background-size: 1rem 1rem;
}

.form-label {
  display: block;
  margin-bottom: var(--space-xs, 0.25rem);
  font-size: var(--font-size-sm, 0.875rem);
  font-weight: var(--font-weight-medium, 500);
  color: var(--color-fg);
}

.form-hint {
  display: block;
  margin-top: var(--space-xs, 0.25rem);
  font-size: var(--font-size-xs, 0.75rem);
  color: var(--color-fg-muted);
}

.form-error {
  display: block;
  margin-top: var(--space-xs, 0.25rem);
  font-size: var(--font-size-xs, 0.75rem);
  color: var(--color-danger);
}


/* ------------------------------------------------------------
   ALERTS
   ------------------------------------------------------------ */
.alert {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm, 0.75rem);
  padding: var(--space-sm, 0.75rem) var(--space-md, 1rem);
  border: 1px solid transparent;
  border-left-width: 4px;
  border-radius: var(--radius-md, 0.5rem);
  font-size: var(--font-size-sm, 0.875rem);
  line-height: 1.5;
}

.alert__icon {
  flex-shrink: 0;
  width: 1.25rem;
  height: 1.25rem;
  margin-top: 0.125rem;
}

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

.alert__title {
  font-weight: var(--font-weight-semibold, 600);
  margin-bottom: 0.125rem;
}

.alert--info {
  background-color: var(--color-info-bg);
  border-color: var(--color-info-border);
  border-left-color: var(--color-primary);
  color: var(--color-info-text);
}

.alert--success {
  background-color: var(--color-success-bg);
  border-color: var(--color-success-border);
  border-left-color: var(--color-success);
  color: var(--color-success-text);
}

.alert--warning {
  background-color: var(--color-warning-bg);
  border-color: var(--color-warning-border);
  border-left-color: var(--color-warning);
  color: var(--color-warning-text);
}

.alert--danger {
  background-color: var(--color-danger-bg);
  border-color: var(--color-danger-border);
  border-left-color: var(--color-danger);
  color: var(--color-danger-text);
}


/* ------------------------------------------------------------
   MODAL
   ------------------------------------------------------------ */
.modal {
  position: fixed;
  inset: 0;
  z-index: var(--z-modal, 1000);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-md, 1rem);
}
.modal[hidden] {
  display: none;
}

.modal__backdrop {
  position: absolute;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(2px);
  animation: modal-fade-in var(--transition-base, 200ms) ease;
}

.modal__content {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 32rem;
  max-height: calc(100vh - 2rem);
  overflow-y: auto;
  padding: var(--space-lg, 1.5rem);
  background-color: var(--color-surface);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg, 0.75rem);
  box-shadow: var(--shadow-lg);
  animation: modal-slide-up var(--transition-base, 200ms) ease;
}

@keyframes modal-fade-in {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@keyframes modal-slide-up {
  from { opacity: 0; transform: translateY(1rem) scale(0.98); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}


/* ------------------------------------------------------------
   TABS
   ------------------------------------------------------------ */
.tabs {
  display: flex;
  gap: var(--space-xs, 0.25rem);
  border-bottom: 1px solid var(--color-border);
  overflow-x: auto;
  scrollbar-width: thin;
}

.tabs__tab {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm, 0.5rem);
  padding: var(--space-sm, 0.75rem) var(--space-md, 1rem);
  min-height: 40px;
  font-family: inherit;
  font-size: var(--font-size-md, 1rem);
  font-weight: var(--font-weight-medium, 500);
  color: var(--color-text-muted);
  background-color: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  cursor: pointer;
  white-space: nowrap;
  transition:
    color var(--transition-fast, 150ms) ease,
    border-color var(--transition-fast, 150ms) ease,
    background-color var(--transition-fast, 150ms) ease;
}

.tabs__tab:hover {
  color: var(--color-text);
  background-color: var(--color-surface-hover);
}

.tabs__tab:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px var(--color-focus-ring);
  border-radius: var(--radius-sm, 0.375rem) var(--radius-sm, 0.375rem) 0 0;
}

.tabs__tab--active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

.tabs__tab:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}


/* ------------------------------------------------------------
   SPINNER
   ------------------------------------------------------------ */
.spinner {
  display: inline-block;
  width: 1.25rem;
  height: 1.25rem;
  border: 2px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spinner-rotate 0.75s linear infinite;
  vertical-align: middle;
}

.spinner--sm { width: 1rem;    height: 1rem;    border-width: 2px; }
.spinner--lg { width: 2rem;    height: 2rem;    border-width: 3px; }

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


/* ------------------------------------------------------------
   SKELETON (Loading-Placeholder)
   ------------------------------------------------------------ */
.skeleton {
  display: block;
  width: 100%;
  height: 1em;
  background-color: var(--color-surface-muted);
  background-image: linear-gradient(
    90deg,
    var(--color-surface-muted) 0%,
    var(--color-skeleton-shimmer) 50%,
    var(--color-surface-muted) 100%
  );
  background-size: 200% 100%;
  border-radius: var(--radius-sm, 0.375rem);
  animation: skeleton-shimmer 1.5s ease-in-out infinite;
}

.skeleton--text  { height: 0.875em; }
.skeleton--title { height: 1.5em; width: 60%; }
.skeleton--avatar {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--radius-full, 9999px);
}

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


/* ------------------------------------------------------------
   REDUCED MOTION
   ------------------------------------------------------------ */
@media (prefers-reduced-motion: reduce) {
  .btn,
  .icon-button,
  .card,
  .input,
  .textarea,
  .select,
  .toggle__slider,
  .toggle__slider::before,
  .progress-bar__fill,
  .tabs__tab {
    transition: none;
  }
  .spinner,
  .skeleton,
  .modal__backdrop,
  .modal__content {
    animation: none;
  }
}