* {
  box-sizing: border-box;
  font-family: Arial, Helvetica, sans-serif;
}

body {
  margin: 0;
  background: #f4f6fb;
  color: #1f2937;
}

body.preauth .container {
  display: none;
}

.container {
  max-width: min(1520px, 96vw);
  margin: 0 auto;
  padding: 20px;
}

.subtitle {
  color: #4b5563;
}

.card {
  background: #ffffff;
  border-radius: 12px;
  padding: 16px;
  margin: 14px 0;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.06);
}

.tiles {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  overflow-x: visible;
  padding-bottom: 4px;
  align-items: flex-start;
}

.draw-separator {
  width: 12px;
  flex: 0 0 12px;
  min-height: 88px;
  align-self: stretch;
  background: linear-gradient(180deg, transparent 20%, #cbd5e1 45%, transparent 55%, transparent);
  opacity: 0.75;
}

.tile-btn {
  border: 1px solid #cbd5e1;
  background: linear-gradient(180deg, #ffffff 0%, #f1f5f9 100%);
  color: #111827;
  border-radius: 10px;
  width: 64px;
  height: 94px;
  padding: 5px 3px;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
  transition: transform 0.12s ease, box-shadow 0.12s ease;
}

.tile-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 12px rgba(0, 0, 0, 0.12);
}

.tile-unicode {
  font-size: 38px;
  line-height: 1;
}

.tile-code {
  font-size: 13px;
  color: #475569;
  letter-spacing: -0.02em;
}

.choices {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.choice-btn {
  min-width: 220px;
  min-height: 48px;
  padding: 10px 16px;
  font-size: 1rem;
  line-height: 1.35;
}

.choice-tile-inline {
  font-size: 0.92em;
  line-height: 1;
  vertical-align: -0.04em;
}

.hint {
  color: #64748b;
}

.actions {
  margin-top: 12px;
}

button {
  border: 0;
  border-radius: 8px;
  background: #1d4ed8;
  color: #ffffff;
  padding: 8px 12px;
  cursor: pointer;
}

button:hover {
  background: #1e40af;
}

textarea {
  width: 100%;
  border: 1px solid #d1d5db;
  border-radius: 8px;
  padding: 8px;
  resize: vertical;
}

.hidden {
  display: none;
}

.ok {
  color: #166534;
}

.bad {
  color: #991b1b;
}

.top-nav {
  margin-bottom: 8px;
}

.top-nav a {
  color: #1d4ed8;
  text-decoration: none;
}

.top-nav a:hover {
  text-decoration: underline;
}

.question-nav-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.question-nav-actions button:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.diagram-wrap {
  margin: 18px 0 12px;
}

.diagram-placeholder {
  padding: 12px 14px;
  border-radius: 10px;
  background: #f8fafc;
  border: 1px dashed #cbd5e1;
}

.diagram-placeholder p {
  margin: 0;
}

.diagram-img {
  display: block;
  max-width: 100%;
  height: auto;
  border-radius: 8px;
  border: 1px solid #e2e8f0;
}

.table-wrap {
  overflow-x: auto;
}

.question-index-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
}

.question-index-table th,
.question-index-table td {
  border: 1px solid #e5e7eb;
  padding: 8px 10px;
  text-align: left;
}

.question-index-table th {
  background: #f8fafc;
}

.status-badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 6px;
  font-size: 13px;
}

.status-none {
  background: #f1f5f9;
  color: #475569;
}

.status-ok {
  background: #dcfce7;
  color: #166534;
}

.status-bad {
  background: #fee2e2;
  color: #991b1b;
}

.status-mix {
  background: #fef9c3;
  color: #854d0e;
}

.btn-secondary {
  background: #64748b;
}

.btn-secondary:hover {
  background: #475569;
}

.question-detail {
  margin: 10px 0 14px;
  font-size: 15px;
}

.question-detail-title {
  font-size: 1.15rem;
  margin: 6px 0 8px;
}

.question-flags-compact {
  margin: 2px 0 8px;
  padding: 4px 0 8px;
  border-bottom: 1px solid #e5e7eb;
  font-size: 12px;
  line-height: 1.35;
  color: #475569;
}

.flags-compact-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 10px;
}

.flags-compact-history {
  flex: 1 1 200px;
  min-width: 0;
}

.flags-override-chip {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  padding: 1px 7px;
  border-radius: 4px;
  background: #e0f2fe;
  color: #0369a1;
  border: 1px solid #bae6fd;
}

.study-flag-compact {
  margin-top: 0 !important;
  padding: 4px 10px !important;
  font-size: 12px !important;
}

.meta-history.ok-line {
  color: #166534;
}

.meta-history.warn-line {
  color: #a16207;
}

.study-flag-btn {
  margin-top: 6px;
}

.study-flag-on {
  background: #059669 !important;
}

.study-flag-on:hover {
  background: #047857 !important;
}

.correction-panel {
  margin: 12px 0;
  padding: 8px 10px;
  border: 1px dashed #cbd5e1;
  border-radius: 8px;
  background: #fafbfc;
}

.correction-panel summary {
  cursor: pointer;
  font-weight: 600;
}

.correction-fields {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin: 10px 0;
}

.correction-hint {
  margin: 8px 0 0;
  font-size: 13px;
}

.correction-actions {
  flex-wrap: wrap;
}

.choice-with-feedback {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  flex-shrink: 0;
}

.choice-with-feedback .tile-btn {
  flex-shrink: 0;
}

.choice-with-feedback.choice-row {
  align-items: stretch;
}

.inline-outcome {
  min-height: 1.25em;
  font-size: 11px;
  font-weight: 600;
  text-align: center;
  max-width: min(100px, 28vw);
  line-height: 1.25;
  word-break: break-word;
}

.inline-outcome.ok {
  color: #166534;
}

.inline-outcome.bad {
  color: #991b1b;
}

.small-star {
  color: #eab308;
  margin-right: 4px;
}

.storage-origin-hint {
  font-size: 13px;
  margin: 0 0 10px;
  padding: 8px 10px;
  background: #f1f5f9;
  border-radius: 8px;
  border: 1px solid #e2e8f0;
}

.storage-origin-foot {
  margin: 14px 0 0;
  font-size: 12px;
  padding: 6px 8px;
}

.access-gate {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 20px;
}

.access-gate-card {
  width: min(520px, 96vw);
  background: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: 14px;
  box-shadow: 0 8px 28px rgba(15, 23, 42, 0.12);
  padding: 18px;
}

.access-gate-title {
  margin: 0 0 8px;
}

.access-gate-desc {
  margin: 0 0 12px;
  color: #475569;
}

.access-gate-form {
  display: flex;
  gap: 8px;
}

.access-gate-input {
  flex: 1 1 auto;
  padding: 9px 10px;
  border: 1px solid #cbd5e1;
  border-radius: 8px;
  font-size: 14px;
}

.access-gate-error {
  margin: 10px 0 0;
  color: #991b1b;
  font-size: 13px;
  min-height: 1.3em;
}

.result-nav-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 12px;
}

.result-nav-actions button:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

@media (max-width: 900px) {
  .container {
    padding: 12px;
  }

  .choices {
    gap: 6px;
  }

  .choice-btn {
    min-width: 88px !important;
    min-height: 34px !important;
    padding: 6px 8px !important;
    font-size: 0.76rem !important;
    line-height: 1.15 !important;
    border-radius: 7px !important;
  }

  .choice-btn .choice-tile-inline {
    font-size: 0.8em !important;
  }

  .inline-outcome {
    font-size: 10px !important;
    max-width: min(72px, 24vw);
  }
}