/* ── Shell ───────────────────────────────────────── */
body {
  padding: var(--space-6);
}

.iet-shell {
  max-width: 1080px;
  margin: 0 auto;
  padding-top: 40px;
}

.iet-header {
  margin-bottom: var(--space-8);
}

.iet-header h1 {
  font-size: clamp(2rem, 2.5vw, 2.6rem);
  margin-bottom: var(--space-2);
}

.iet-subtitle {
  color: var(--color-text-muted);
  max-width: 62ch;
}

/* ── View-Switching ──────────────────────────────── */
.iet-view { display: none; }
#iet-app[data-view="loading"]    .iet-view[data-view-name="loading"],
#iet-app[data-view="empty"]      .iet-view[data-view-name="empty"],
#iet-app[data-view="error"]      .iet-view[data-view-name="error"],
#iet-app[data-view="home"]       .iet-view[data-view-name="home"],
#iet-app[data-view="topics"]     .iet-view[data-view-name="topics"],
#iet-app[data-view="question"]   .iet-view[data-view-name="question"],
#iet-app[data-view="sim-setup"]  .iet-view[data-view-name="sim-setup"],
#iet-app[data-view="sim"]        .iet-view[data-view-name="sim"],
#iet-app[data-view="result"]     .iet-view[data-view-name="result"],
#iet-app[data-view="review"]     .iet-view[data-view-name="review"],
#iet-app[data-view="history"]    .iet-view[data-view-name="history"] {
  display: block;
}

.iet-loader {
  color: var(--color-text-muted);
  text-align: center;
  padding: var(--space-8);
}

.iet-status {
  margin-bottom: var(--space-4);
  padding: var(--space-3) var(--space-4);
  border: 1px solid rgba(251, 191, 36, 0.35);
  border-radius: var(--radius-sm);
  background: rgba(251, 191, 36, 0.1);
  color: var(--color-warning);
}

/* ── Overall-Progress auf Home ───────────────────── */
.iet-overall { margin-bottom: var(--space-6); }
.iet-overall-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-3);
}
.iet-overall-note {
  margin-top: var(--space-2);
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

.iet-badge-accent {
  background: rgba(37, 99, 235, 0.2);
  color: var(--color-accent-light);
}

/* ── Progress Bar (wiederverwendet) ──────────────── */
.iet-progress {
  display: block;
  width: 100%;
  height: 10px;
  background: rgba(148, 163, 184, 0.15);
  border-radius: var(--radius-full);
  overflow: hidden;
}
.iet-progress-fill {
  display: block;
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--color-accent), var(--color-accent-light));
  border-radius: var(--radius-full);
  transition: width 300ms ease;
}
.iet-progress-sm { height: 6px; }
.iet-progress-lg { height: 14px; }
.iet-progress-note {
  margin-top: var(--space-2);
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

/* ── Home-Aktionskarten ──────────────────────────── */
.iet-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--space-5);
}
.iet-card-action {
  width: 100%;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  cursor: pointer;
  position: relative;
  transition: transform var(--transition-base), border-color var(--transition-base);
  display: flex;
  flex-direction: column;
  color: inherit;
  text-align: left;
  gap: var(--space-3);
}
.iet-card-action:hover {
  transform: translateY(-4px);
  border-color: var(--color-accent-light);
}
.iet-card-action:focus-visible,
.iet-topic-card:focus-visible,
.iet-filter:focus-visible,
.iet-pager-dot:focus-visible,
.iet-option:has(input:focus-visible) {
  outline: 3px solid var(--color-accent-light);
  outline-offset: 3px;
}
.iet-card-title {
  display: block;
  font-size: 1.1rem;
  line-height: 1.25;
  font-weight: 700;
}
.iet-card-description {
  display: block;
  color: var(--color-text-muted);
  font-size: 0.95rem;
  line-height: 1.6;
  flex: 1;
}
.iet-arrow {
  align-self: flex-end;
  font-size: 1.3rem;
  color: var(--color-accent-light);
}

/* Same tag style as root module cards */
.module-tag {
  display: inline-flex;
  align-items: center;
  padding: 2px 10px;
  border-radius: var(--radius-full);
  font-size: 0.72rem;
  font-weight: 600;
  background: rgba(37, 99, 235, 0.15);
  color: var(--color-accent-light);
  width: fit-content;
}

/* ── Toolbar / Filter ────────────────────────────── */
.iet-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  flex-wrap: wrap;
  margin-bottom: var(--space-5);
}
.iet-filters {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}
.iet-filter {
  background: transparent;
  border: 1px solid var(--color-border-input);
  color: var(--color-text-secondary);
  border-radius: var(--radius-full);
  padding: 6px 14px;
  font-size: 0.9rem;
  cursor: pointer;
  transition: background var(--transition-fast), border-color var(--transition-fast);
}
.iet-filter:hover { border-color: var(--color-accent-light); }
.iet-filter.is-active {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: #fff;
}

/* ── Themen-Liste ───────────────────────────────── */
.iet-topic-list {
  display: grid;
  gap: var(--space-4);
}
.iet-topic-card {
  width: 100%;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  cursor: pointer;
  display: grid;
  gap: var(--space-3);
  grid-template-columns: 1fr auto;
  align-items: center;
  transition: border-color var(--transition-base);
  color: inherit;
  text-align: left;
}
.iet-topic-card:hover { border-color: var(--color-accent-light); }
.iet-topic-main { display: block; }
.iet-topic-head {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: wrap;
}
.iet-topic-title { font-size: 1rem; font-weight: 700; line-height: 1.25; }
.iet-topic-stats {
  display: block;
  color: var(--color-text-muted);
  font-size: 0.85rem;
  margin-top: 4px;
}
.iet-topic-pct {
  display: block;
  font-weight: 700;
  color: var(--color-accent-light);
  min-width: 50px;
  text-align: right;
}
.iet-topic-bar-wrap {
  display: block;
  grid-column: 1 / -1;
}

/* ── Frage-Karte ─────────────────────────────────── */
.iet-q-card {
  display: grid;
  gap: var(--space-5);
}
.iet-q-meta {
  color: var(--color-text-muted);
  font-size: 0.85rem;
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
}
.iet-q-meta .badge {
  background: rgba(96, 165, 250, 0.15);
  color: var(--color-accent-light);
}
.iet-q-text {
  font-size: 1.2rem;
  line-height: 1.5;
}
.iet-q-diagram img {
  max-width: 100%;
  border-radius: var(--radius-md);
  background: #fff;
}

.iet-q-options {
  display: grid;
  gap: var(--space-3);
}
.iet-option {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-4);
  border: 1px solid var(--color-border-input);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: border-color var(--transition-fast), background var(--transition-fast);
  background: var(--color-bg-input);
}
.iet-option:hover:not(.is-disabled) {
  border-color: var(--color-accent-light);
}
.iet-option input {
  margin-top: 3px;
  accent-color: var(--color-accent);
  flex-shrink: 0;
}
.iet-option-letter {
  font-weight: 700;
  color: var(--color-text-muted);
  min-width: 20px;
}
.iet-option-text { flex: 1; line-height: 1.45; }
.iet-option.is-correct {
  border-color: var(--color-success);
  background: rgba(74, 222, 128, 0.1);
}
.iet-option.is-wrong {
  border-color: var(--color-error);
  background: rgba(248, 113, 113, 0.1);
}
.iet-option.is-disabled { cursor: default; }

.iet-q-actions {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
}

.iet-hint {
  border-left: 3px solid var(--color-warning);
  background: rgba(251, 191, 36, 0.08);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-sm);
  color: var(--color-text-secondary);
}

.iet-feedback {
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-sm);
  font-weight: 600;
}
.iet-feedback.is-ok  { background: rgba(74, 222, 128, 0.12); color: var(--color-success); }
.iet-feedback.is-err { background: rgba(248, 113, 113, 0.12); color: var(--color-error); }

.iet-solution-toggle { padding: 6px 14px; font-size: 0.9rem; }
.iet-solution-body {
  margin-top: var(--space-3);
  padding: var(--space-4);
  background: var(--color-bg-input);
  border-radius: var(--radius-sm);
  color: var(--color-text-secondary);
  line-height: 1.6;
  white-space: pre-wrap;
}
.iet-solution-body code {
  background: rgba(148, 163, 184, 0.15);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.9em;
}

/* ── Leerer Zustand ─────────────────────────────── */
.iet-empty {
  display: grid;
  gap: var(--space-4);
  justify-items: start;
}

/* ── Simulation ─────────────────────────────────── */
.iet-sim-parts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-4);
  margin-top: var(--space-4);
}
.iet-sim-part-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  cursor: pointer;
  display: grid;
  gap: var(--space-2);
  transition: border-color var(--transition-base);
}
.iet-sim-part-card:hover:not([disabled]) { border-color: var(--color-accent-light); }
.iet-sim-part-card[disabled] { opacity: 0.4; cursor: not-allowed; }
.iet-sim-part-title { display: block; font-size: 1.05rem; font-weight: 700; line-height: 1.25; }
.iet-sim-part-detail { display: block; color: var(--color-text-muted); font-size: 0.85rem; line-height: 1.5; }

.iet-sim-bar {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-3) var(--space-4);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-5);
  flex-wrap: wrap;
}
.iet-sim-part { font-weight: 600; color: var(--color-text-secondary); }
.iet-sim-timer {
  font-family: var(--font-mono);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--color-accent-light);
  letter-spacing: 1px;
}
.iet-sim-timer.is-warning { color: var(--color-warning); }
.iet-sim-timer.is-critical { color: var(--color-error); animation: pulse 1s infinite; }
@keyframes pulse { 50% { opacity: 0.5; } }
.iet-sim-counter { color: var(--color-text-muted); font-size: 0.9rem; margin-left: auto; }

.iet-sim-nav {
  display: flex;
  justify-content: space-between;
  gap: var(--space-3);
  flex-wrap: wrap;
}

.iet-sim-pager {
  margin-top: var(--space-5);
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.iet-pager-dot {
  position: relative;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border-input);
  background: transparent;
  color: var(--color-text-muted);
  font-size: 0.85rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}
.iet-pager-dot:hover { border-color: var(--color-accent-light); }
.iet-pager-dot.is-current {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: #fff;
}
.iet-pager-dot.is-answered {
  border-color: var(--color-accent);
  color: var(--color-accent-light);
}
.iet-pager-dot.is-marked::after {
  content: '★';
  position: absolute;
  font-size: 0.7rem;
  color: var(--color-warning);
}

/* ── Ergebnis ──────────────────────────────────── */
.iet-result { display: grid; gap: var(--space-5); }
.iet-result-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--space-4);
  flex-wrap: wrap;
}
.iet-result-grade {
  text-align: center;
  background: var(--color-bg-input);
  padding: var(--space-4) var(--space-6);
  border-radius: var(--radius-md);
}
.iet-grade-num {
  display: block;
  font-size: 3rem;
  font-weight: 800;
  color: var(--color-accent-light);
  line-height: 1;
}
.iet-grade-label {
  display: block;
  font-size: 0.75rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-top: 4px;
}
.iet-result-pct {
  margin-top: var(--space-2);
  text-align: center;
  font-size: 1.1rem;
  font-weight: 600;
}
.iet-result-breakdown {
  display: grid;
  gap: var(--space-2);
  padding: var(--space-4);
  background: var(--color-bg-input);
  border-radius: var(--radius-sm);
}
.iet-breakdown-row {
  display: flex;
  justify-content: space-between;
  gap: var(--space-3);
  font-size: 0.9rem;
}
.iet-breakdown-topic { color: var(--color-text-secondary); }
.iet-breakdown-score { color: var(--color-text-muted); font-family: var(--font-mono); }
.iet-result-actions {
  display: flex;
  gap: var(--space-3);
  justify-content: flex-end;
  flex-wrap: wrap;
}

/* ── Review / History ──────────────────────────── */
.iet-review-list,
.iet-history-list {
  display: grid;
  gap: var(--space-4);
}
.iet-review-item {
  background: var(--color-bg-card);
  border-left: 3px solid var(--color-error);
  border-radius: var(--radius-md);
  padding: var(--space-4);
}
.iet-review-item .iet-correct {
  color: var(--color-success);
  font-weight: 600;
  margin-top: var(--space-2);
}
.iet-review-item .iet-selected {
  color: var(--color-error);
  margin-top: var(--space-2);
}
.iet-review-item .iet-explain {
  margin-top: var(--space-3);
  padding-top: var(--space-3);
  border-top: 1px solid var(--color-border-subtle);
  white-space: pre-wrap;
  line-height: 1.6;
  color: var(--color-text-secondary);
}

.iet-history-item {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  display: grid;
  grid-template-columns: 1fr auto;
  gap: var(--space-3);
  align-items: center;
}
.iet-history-meta { color: var(--color-text-muted); font-size: 0.85rem; }
.iet-history-score {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-accent-light);
}

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

@media (max-width: 640px) {
  body { padding: var(--space-4); }
  .iet-shell { padding-top: 52px; }
  .iet-sim-bar { align-items: flex-start; }
  .iet-sim-counter { order: 4; width: 100%; margin-left: 0; }
  .iet-sim-nav > .btn { flex: 1 1 120px; }
  .iet-history-item { grid-template-columns: 1fr; }
  .iet-history-score { font-size: 1.05rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}