/**
 * Aufgabengenerator - Student View
 * Student-specific styles for tasks, questions, evaluation
 */

/* ===== AUFGABEN-SPEZIFISCH ===== */
.question {
  padding: var(--spacing-md);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: var(--spacing-md);
  background: var(--bg-white);
}

.question:hover {
  border-color: var(--border-dark);
}

.qtext {
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  color: var(--fg);
}

.options {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.option-item {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background-color 0.15s ease;
}

.option-item:hover {
  background: var(--chip-bg);
}

.option-item input[type="radio"] {
  width: auto;
  margin-top: 2px;
}

.question summary {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Wortbank */
.wordbank {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  padding: var(--spacing-md);
  background: var(--chip-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: var(--spacing-md);
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-xs) var(--spacing-sm);
  background: var(--bg-white);
  color: var(--chip-fg);
  border: 1px solid var(--border-dark);
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  user-select: text;
}

.wb-chip {
  cursor: grab;
  user-select: none;
  transition: all 0.15s ease;
}

.wb-chip:hover {
  border-color: var(--primary);
}

.wb-chip:focus {
  outline: 2px solid var(--primary-light);
  outline-offset: 2px;
}

.wb-chip.selected {
  background: var(--primary-bg);
  border-color: var(--primary);
  color: var(--primary);
}

.wb-chip[aria-disabled="true"] {
  opacity: 0.45;
  cursor: not-allowed;
}

.wb-chip.dragging {
  opacity: 0.6;
}

.chip.label {
  background: transparent;
  border-style: dashed;
  cursor: default;
}

/* Lückentext */
.cloze-sentence {
  margin: var(--spacing-sm) 0 var(--spacing-md);
  line-height: 2;
}

.cloze-sentence input[type="text"] {
  display: inline-block;
  min-width: 9ch;
  max-width: 20ch;
  width: auto;
  margin: 0 2px;
  padding: var(--spacing-xs) var(--spacing-sm);
  font-size: 0.95rem;
  vertical-align: baseline;
  text-align: center;
}

.cloze-sentence input.drop-target {
  border-color: var(--primary);
  background: var(--primary-bg);
}

.cloze-sentence input.is-correct {
  background: var(--success-bg);
  border-color: var(--success-border);
  color: var(--success);
}

.cloze-sentence input.is-incorrect {
  background: var(--danger-bg);
  border-color: var(--danger-border);
  color: var(--danger);
}

/* Lehrer-Vorschau: korrekte Cloze-Antworten */
.cloze-sentence input.cloze-answer-preview {
  background: var(--success-bg);
  border-color: var(--success-border);
  color: var(--success);
  font-style: italic;
  cursor: default;
}

.cloze-answer-badge {
  display: inline-block;
  font-size: 0.7em;
  font-weight: 700;
  color: var(--success);
  margin-left: 4px;
  vertical-align: super;
}

/* Auswertung */
.cloze-inline .blank {
  font-weight: 600;
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
}

.cloze-inline .blank.correct {
  background: var(--success-bg);
  border-color: var(--success-border);
  color: var(--success);
}

.cloze-inline .blank.incorrect {
  background: var(--danger-bg);
  border-color: var(--danger-border);
  color: var(--danger);
}

.cloze-inline .expected {
  color: var(--danger);
  margin-left: 4px;
  font-weight: normal;
  font-size: 0.9em;
}

/* ===== ERGEBNISSE ===== */
#results {
  display: none;
}

#results.results-visible {
  display: block;
}

.result-summary {
  background: var(--primary-bg);
  border: 1px solid var(--primary);
  border-radius: var(--radius);
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}

.result-summary strong {
  color: var(--primary-dark);
}

.sc-result .option {
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius);
  margin: var(--spacing-xs) 0;
  border: 1px solid transparent;
}

.sc-result .option.correct {
  background: var(--success-bg);
  border-color: var(--success-border);
}

.sc-result .option.selected {
  outline: 2px solid var(--primary);
}

.sc-result .option.incorrect-selected {
  background: var(--danger-bg);
  border-color: var(--danger-border);
}

.qa-block {
  border: 1px solid var(--border);
  padding: var(--spacing-md);
  border-radius: var(--radius);
  margin: var(--spacing-sm) 0;
  background: var(--bg-white);
}

.qa-block .label {
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
}

/* ===== SCHÜLERANSICHT (mit vereinfachter Sidebar) ===== */
.student-view .sidebar {
  /* Sidebar bleibt, aber evtl. etwas schmaler */
}

.student-view .content-body {
  max-width: 900px;
}

/* ===== Schueler Page ===== */
.task-card {
  background: var(--bg-white, white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
  transition: box-shadow var(--duration-normal, 0.2s) var(--ease-out, ease),
              transform var(--duration-normal, 0.2s) var(--ease-out, ease);
  animation: task-card-enter 0.3s ease backwards;
}

/* Staggered entrance animation */
.task-card:nth-child(1) { animation-delay: 0ms; }
.task-card:nth-child(2) { animation-delay: 50ms; }
.task-card:nth-child(3) { animation-delay: 100ms; }
.task-card:nth-child(4) { animation-delay: 150ms; }
.task-card:nth-child(5) { animation-delay: 200ms; }
.task-card:nth-child(n+6) { animation-delay: 250ms; }

@keyframes task-card-enter {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.task-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

/* Task-Karte mit Abgabe */
.task-card.task-submitted {
  border-left: 4px solid var(--success, #22c55e);
  background: linear-gradient(to right, var(--success-bg, #f0fdf4), var(--bg-white));
}

.task-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 0.5rem;
}

.task-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin: 0;
}

.task-meta {
  color: var(--fg-muted);
  font-size: 0.9rem;
}

.task-status {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.submission-info {
  background: var(--success-bg);
  border: 1px solid var(--success);
  border-radius: var(--radius);
  padding: var(--spacing-sm) var(--spacing-md);
  margin-top: var(--spacing-sm);
  font-size: 0.9rem;
}

.submission-info.late {
  background: var(--warning-bg);
  border-color: var(--warning);
}

.deadline-warning {
  color: var(--danger);
  font-weight: 500;
}

.deadline-ok {
  color: var(--success);
}

.empty-state {
  text-align: center;
  padding: 3rem;
  color: var(--fg-muted);
}

.empty-state svg {
  width: 64px;
  height: 64px;
  margin-bottom: 1rem;
  opacity: 0.5;
}

/* ===== RE-UPLOAD SECTION ===== */
.reupload-section {
  margin-bottom: var(--spacing-lg);
}

.reupload-panel {
  margin-top: var(--spacing-md);
  padding: var(--spacing-lg);
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}

/* Upload Dropzone */
.upload-dropzone {
  border: 2px dashed var(--border-dark);
  border-radius: var(--radius-lg);
  padding: 2rem;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
}

.upload-dropzone:hover,
.upload-dropzone.drag-over {
  border-color: var(--primary);
  background: var(--primary-bg);
}

.upload-dropzone .icon-lg {
  font-size: 3rem;
  color: var(--fg-muted);
  margin-bottom: 1rem;
  display: block;
}

.upload-dropzone .icon-lg svg {
  width: 48px;
  height: 48px;
}

.upload-dropzone p {
  margin: 0.5rem 0;
}

.upload-dropzone .text-muted {
  font-size: 0.875rem;
  color: var(--fg-muted);
}

.upload-dropzone .btn-link {
  background: none;
  border: none;
  color: var(--primary);
  text-decoration: underline;
  cursor: pointer;
  padding: 0;
  font: inherit;
}

.upload-dropzone .btn-link:hover {
  color: var(--primary-dark);
}

/* Selected file info */
.selected-file {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  margin-top: var(--spacing-md);
  background: var(--chip-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

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

.selected-file .btn-icon {
  margin-left: auto;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  border-radius: var(--radius-sm);
  color: var(--fg-muted);
}

.selected-file .btn-icon:hover {
  background: var(--danger-bg);
  color: var(--danger);
}

/* Reupload metadata form */
.reupload-meta {
  margin-top: var(--spacing-lg);
  padding: var(--spacing-lg);
  background: var(--bg-subtle);
  border-radius: var(--radius);
}

.reupload-meta h4 {
  margin: 0 0 var(--spacing-md);
  font-size: 1rem;
}

.reupload-meta .form-row {
  margin-bottom: var(--spacing-md);
}

.reupload-meta label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.25rem;
  font-size: 0.875rem;
}

.reupload-meta input[type="text"] {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font: inherit;
  background: var(--bg-white);
}

.reupload-meta input[type="text"]:focus {
  outline: 2px solid var(--primary-light);
  outline-offset: 1px;
  border-color: var(--primary);
}

.reupload-meta input[type="text"]:read-only {
  background: var(--bg-subtle);
  color: var(--fg-muted);
}

.reupload-meta .btn-group {
  margin-top: var(--spacing-lg);
  display: flex;
  gap: var(--spacing-sm);
}

/* ===== SORT CONTROLS ===== */
.sort-controls {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--bg-subtle);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.875rem;
}

.sort-controls label {
  margin: 0;
  font-weight: 500;
  color: var(--fg-muted);
  white-space: nowrap;
  font-size: 0.875rem;
}

.sort-controls select {
  width: auto;
  min-width: 140px;
  max-width: 200px;
  padding: var(--spacing-xs) var(--spacing-sm);
  font-size: 0.875rem;
}

.sort-direction-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  padding: 0 !important;
  flex-shrink: 0;
  transition: transform 0.2s ease;
}

.sort-direction-btn.sort-asc {
  transform: rotate(180deg);
}

@media (max-width: 480px) {
  .sort-controls {
    flex-wrap: wrap;
  }
  .sort-controls label {
    width: 100%;
  }
  .sort-controls select {
    flex: 1;
    min-width: 0;
  }
}

/* ===== WORKSHEET WRAPPER (Iframe-Integration) ===== */
.worksheet-wrapper {
  display: flex;
  flex-direction: column;
  height: calc(100vh - var(--header-height, 56px));
  overflow: hidden;
}

.worksheet-toolbar {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm, 8px);
  padding: var(--spacing-xs, 4px) var(--spacing-md, 16px);
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
  min-height: 44px;
}

.worksheet-back-btn {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.worksheet-title {
  flex: 1;
  margin: 0;
  font-size: 0.95rem;
  font-weight: 600;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.worksheet-iframe-container {
  flex: 1;
  position: relative;
  overflow: hidden;
}

.worksheet-iframe {
  width: 100%;
  height: 100%;
  border: none;
  background: var(--bg-page);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.worksheet-iframe.loaded {
  opacity: 1;
}

.worksheet-loading {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-md, 16px);
  background: var(--bg-page);
}

.worksheet-loading .spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: worksheet-spin 0.8s linear infinite;
}

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

.worksheet-loading p {
  color: var(--text-muted, #64748b);
  font-size: 0.875rem;
}

.worksheet-error {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-md, 16px);
  background: var(--bg-page);
  color: var(--text-muted, #64748b);
}

/* Mobile: Account for both app-header and mobile-header */
@media (max-width: 1024px) {
  .worksheet-wrapper {
    height: calc(100vh - 56px - 56px);
  }

  .worksheet-toolbar {
    flex-wrap: wrap;
    padding: var(--spacing-xs, 4px) var(--spacing-sm, 8px);
  }

  .worksheet-title {
    order: -1;
    width: 100%;
    font-size: 0.875rem;
  }

  .worksheet-back-label {
    display: none;
  }
}

/* ===== SUBMISSION VIEWER (DOMParser-based) ===== */
.submission-viewer {
  flex: 1;
  overflow-y: auto;
  padding: var(--spacing-md, 16px);
  background: var(--bg-page, #fff);
}

.submission-viewer-content {
  max-width: 800px;
  margin: 0 auto;
}

.submission-viewer-actions {
  max-width: 800px;
  margin: var(--spacing-md, 16px) auto 0;
  padding-top: var(--spacing-sm, 8px);
  border-top: 1px solid var(--border, #e2e8f0);
  display: flex;
  gap: var(--spacing-sm, 8px);
  justify-content: flex-end;
}

/* Evaluation viewer (rendered by extractEvaluationFromHtml) */
.evaluation-viewer {
  font-family: var(--font-body, Arial, Helvetica, sans-serif);
  line-height: 1.5;
  color: var(--text-primary, #0f172a);
}

.evaluation-header h4 {
  font-size: 1.25rem;
  margin: 0 0 6px;
  border-bottom: 2px solid var(--primary, #2563eb);
  padding-bottom: 8px;
  color: var(--text-primary, #0f172a);
}

.evaluation-header p {
  color: var(--text-muted, #64748b);
  margin: 0 0 16px;
}

/* Eval section styles (match abgaben.js fullHtml template) */
.evaluation-body .eval-section {
  margin: 16px 0;
  padding: 12px;
  border: 1px solid var(--border, #e2e8f0);
  border-radius: 8px;
  background: var(--bg-card, #fafafa);
}

.evaluation-body .eval-section h4 {
  font-size: 1.1rem;
  margin: 0 0 12px;
  color: var(--primary-dark, #1d4ed8);
  border-bottom: 2px solid var(--primary, #2563eb);
  padding-bottom: 6px;
}

.evaluation-body .eval-qa {
  border: 1px solid var(--border, #e2e8f0);
  border-radius: 8px;
  padding: 10px 12px;
  margin: 8px 0;
  background: var(--bg-page, #fff);
}

.evaluation-body .eval-label {
  font-weight: 700;
  margin-bottom: 6px;
  color: var(--text-primary, #0f172a);
}

.evaluation-body .eval-option {
  display: block;
  padding: 6px 10px;
  border-radius: 6px;
  margin: 3px 0;
  border: 1px solid transparent;
  background: var(--bg-subtle, #f8fafc);
}

.evaluation-body .eval-option.correct {
  background: var(--success-bg, #dcfce7);
  border-color: var(--success-border, #86efac);
}

.evaluation-body .eval-option.selected {
  outline: 2px solid var(--accent, #60a5fa);
}

.evaluation-body .eval-option.incorrect-selected {
  background: var(--danger-bg, #fee2e2);
  border-color: var(--danger-border, #fca5a5);
}

.evaluation-body .eval-badge {
  display: inline-block;
  font-size: .75rem;
  padding: 2px 8px;
  border-radius: 999px;
  margin-left: 8px;
  font-weight: 600;
}

.evaluation-body .eval-badge-correct { background: var(--success-bg, #dcfce7); color: var(--success, #166534); }
.evaluation-body .eval-badge-selected { background: var(--accent-bg, #dbeafe); color: var(--primary-dark, #1d4ed8); }

.evaluation-body .eval-blank {
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 4px;
  border: 1px solid var(--border, #cbd5e1);
  background: var(--bg-subtle, #f1f5f9);
}

.evaluation-body .eval-blank.correct { background: var(--success-bg, #dcfce7); border-color: var(--success-border, #86efac); color: var(--success, #166534); }
.evaluation-body .eval-blank.incorrect { background: var(--danger-bg, #fee2e2); border-color: var(--danger-border, #fca5a5); color: var(--danger, #991b1b); }

.evaluation-body .eval-summary {
  background: linear-gradient(135deg, var(--bg-subtle, #f8fafc), var(--bg-hover, #e2e8f0));
  border: 1px solid var(--border, #cbd5e1);
  border-radius: 8px;
  padding: 12px 16px;
  margin: 12px 0;
}

/* Answer sections (Tier 2/3 fallback display) */
.evaluation-body .answers-section {
  margin: 16px 0;
  padding: 12px;
  border: 1px solid var(--border, #e2e8f0);
  border-radius: 8px;
  background: var(--bg-card, #fafafa);
}

.evaluation-body .answers-section h5 {
  font-size: 1rem;
  margin: 0 0 10px;
  color: var(--primary-dark, #1d4ed8);
  border-bottom: 1px solid var(--border, #e2e8f0);
  padding-bottom: 6px;
}

.evaluation-body .answer-item {
  padding: 8px 12px;
  margin: 4px 0;
  background: var(--bg-page, #fff);
  border: 1px solid var(--border, #e2e8f0);
  border-radius: 6px;
}

.evaluation-body .answer-label { font-weight: 600; color: var(--text-secondary, #475569); }
.evaluation-body .answer-value { color: var(--text-primary, #0f172a); margin-left: 8px; }