/**
 * Scan Review — canonical review UI.
 *
 * Desktop keeps the two-pane inbox + detail layout. Narrow screens use the
 * same mobile-style detail view from scan-exams, without loading the camera
 * page stylesheet.
 */

:root {
  --scan-primary: #6564b6;
  --scan-primary-dark: #534f9a;
  --scan-text: #1a1a2e;
  --scan-muted: #6b6e80;
  --scan-bg: #fafbff;
  --scan-card: #ffffff;
  --scan-border: #d8d9eb;
  --scan-success: #22c55e;
  --scan-warning: #f59e0b;
  --scan-danger: #ef4444;
}

.scan-review-main {
  min-height: 100vh;
  background: var(--scan-bg);
  font-family: 'Lexend Deca', system-ui, sans-serif;
  color: var(--scan-text);
  padding: env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);
}

.scan-review-main [hidden] {
  display: none !important;
}

.loading-spinner {
  width: 48px;
  height: 48px;
  border: 4px solid var(--scan-border);
  border-top-color: var(--scan-primary);
  border-radius: 50%;
  animation: scan-spin 0.8s linear infinite;
  margin: 4rem auto;
}

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

.scan-exams-msg {
  max-width: 32rem;
  margin: 4rem auto;
  padding: 2rem 1.5rem;
  background: var(--scan-card);
  border: 1px solid var(--scan-border);
  border-radius: 16px;
  text-align: center;
}

.scan-exams-msg h2 {
  margin-top: 0;
  color: var(--scan-primary);
}

.scan-hint,
.sr-hint {
  color: var(--scan-muted);
  font-size: 0.9rem;
  margin: 0.5rem 0;
}

.scan-select,
.scan-input {
  width: 100%;
  padding: 0.75rem 0.9rem;
  font-size: 1rem;
  font-family: inherit;
  border: 1px solid var(--scan-border);
  border-radius: 12px;
  background: var(--scan-card);
  color: var(--scan-text);
}

.scan-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.85rem 1.5rem;
  border-radius: 999px;
  border: 0;
  font-family: inherit;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: filter 0.15s;
}

.scan-btn:active:not([disabled]) { filter: brightness(0.95); }
.scan-btn[disabled] { opacity: 0.5; cursor: not-allowed; }
.scan-btn-primary { background: var(--scan-primary); color: #fff; }
.scan-btn-ghost { background: transparent; border: 1px solid var(--scan-border); color: var(--scan-text); }

/* ---------------------------------------------------------------- layout */

.scan-review-layout {
  display: grid;
  grid-template-columns: minmax(320px, 380px) minmax(0, 1fr);
  height: calc(100vh - 120px);
  max-width: 1400px;
  margin: 0 auto;
  padding: 0;
  background: var(--scan-bg);
}

/* ---------------------------------------------------------------- inbox */

.sr-inbox {
  display: flex;
  flex-direction: column;
  min-width: 0;
  border-right: 1px solid var(--scan-border);
  background: var(--scan-card);
  overflow: hidden;
}

.sr-inbox-header {
  padding: 1.25rem 1rem 0.75rem;
  border-bottom: 1px solid var(--scan-border);
}

.sr-inbox-title {
  font-size: 1.25rem;
  margin: 0;
  color: var(--scan-primary);
}

.sr-inbox-filters {
  padding: 0.75rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  border-bottom: 1px solid var(--scan-border);
}

.sr-filter-select {
  width: 100%;
  padding: 0.5rem 0.7rem;
  font-size: 0.85rem;
  font-family: inherit;
  border: 1px solid var(--scan-border);
  border-radius: 8px;
  background: var(--scan-bg);
  color: var(--scan-text);
}

.sr-chip-row { display: flex; flex-wrap: wrap; gap: 0.35rem; }

.sr-chip {
  font-size: 0.72rem;
  padding: 0.2rem 0.5rem;
  border: 1px solid var(--scan-border);
  border-radius: 999px;
  background: transparent;
  cursor: pointer;
  font-family: inherit;
  color: var(--scan-muted);
  transition: background 0.12s, border-color 0.12s;
}

.sr-chip:hover { border-color: var(--scan-primary); color: var(--scan-primary); }
.sr-chip-active { background: var(--scan-primary); border-color: var(--scan-primary); color: #fff; }

.sr-days-row { display: flex; align-items: center; gap: 0.4rem; }
.sr-days-label { font-size: 0.75rem; color: var(--scan-muted); white-space: nowrap; }
.sr-days-select { flex: 1; }

.sr-refresh-btn {
  background: transparent;
  border: 1px solid var(--scan-border);
  border-radius: 6px;
  width: 32px;
  height: 32px;
  font-size: 1.1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--scan-muted);
  font-family: inherit;
  transition: border-color 0.12s;
}

.sr-refresh-btn:hover { border-color: var(--scan-primary); color: var(--scan-primary); }

.sr-inbox-scroll {
  flex: 1;
  overflow-y: auto;
  padding: 0.75rem 1rem;
}

.scan-review-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.scan-review-item {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr) auto;
  align-items: center;
  gap: 0.85rem;
  padding: 0.85rem;
  background: var(--scan-card);
  border: 1px solid var(--scan-border);
  border-radius: 14px;
  cursor: pointer;
  text-align: left;
  width: 100%;
  font-family: inherit;
  color: inherit;
}

.scan-review-thumb {
  width: 64px;
  height: 90px;
  background: #f0f0f5;
  border-radius: 6px;
  object-fit: cover;
}

.scan-review-name {
  font-weight: 600;
  font-size: 1rem;
  overflow-wrap: anywhere;
}

.scan-review-sub {
  color: var(--scan-muted);
  font-size: 0.85rem;
  overflow-wrap: anywhere;
}

.scan-review-pill {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.25rem 0.6rem;
  border-radius: 999px;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.scan-review-pill[data-status="pending"]      { background: #eef0fb; color: #5b5da3; }
.scan-review-pill[data-status="parsed"]       { background: #ddf6e4; color: #117a3a; }
.scan-review-pill[data-status="needsReview"]  { background: #fff3cd; color: #8a6500; }
.scan-review-pill[data-status="committed"]    { background: #ddf6e4; color: #117a3a; }
.scan-review-pill[data-status="failed"]       { background: #fde2e2; color: #a31616; }

.sr-pagination {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.5rem 0;
  gap: 0.5rem;
}

.sr-page-btn {
  background: transparent;
  border: 1px solid var(--scan-border);
  border-radius: 8px;
  padding: 0.35rem 0.7rem;
  font-size: 0.8rem;
  cursor: pointer;
  font-family: inherit;
  color: var(--scan-text);
  transition: border-color 0.12s;
}

.sr-page-btn:disabled { opacity: 0.4; cursor: not-allowed; }
.sr-page-btn:not(:disabled):hover { border-color: var(--scan-primary); color: var(--scan-primary); }
.sr-page-info { font-size: 0.78rem; color: var(--scan-muted); }

.sr-inbox-footer {
  padding: 0.75rem 1rem;
  border-top: 1px solid var(--scan-border);
  text-align: center;
}

.sr-inbox-footer .scan-btn { width: 100%; }
.sr-inbox-footer .scan-hint { font-size: 0.78rem; margin-top: 0.35rem; }

/* ---------------------------------------------------------------- detail */

.sr-detail {
  display: flex;
  flex-direction: column;
  min-width: 0;
  overflow: hidden;
  background: var(--scan-bg);
}

.sr-detail-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  color: var(--scan-muted);
  text-align: center;
  padding: 2rem;
}

.sr-detail-empty-icon { font-size: 3rem; margin-bottom: 0.75rem; opacity: 0.4; }
.sr-detail-empty h2 { margin: 0 0 0.5rem; font-size: 1.2rem; color: var(--scan-muted); }
.sr-detail-empty p { margin: 0; font-size: 0.9rem; max-width: 24rem; }

.sr-detail-content {
  display: flex;
  flex-direction: column;
  height: 100%;
  overflow: hidden;
}

.sr-detail-topbar {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--scan-border);
  background: var(--scan-card);
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.sr-detail-title {
  font-weight: 600;
  font-size: 1rem;
  color: var(--scan-text);
  overflow-wrap: anywhere;
}

.sr-detail-scroll {
  flex: 1;
  overflow-y: auto;
  padding: 1.25rem;
  max-width: 900px;
  margin: 0 auto;
  width: 100%;
}

.sr-detail-meta,
.scan-detail-meta {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  margin: 1rem 0;
}

.sr-detail-meta-row,
.scan-detail-meta-row {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.sr-detail-meta-row label,
.scan-detail-meta-row label {
  font-size: 0.85rem;
  font-weight: 600;
}

.scan-detail-diag {
  font-size: 0.75rem;
  color: var(--scan-muted);
  margin: 0.4rem 0;
  line-height: 1.4;
  word-break: break-word;
}

.scan-mismatch {
  background: #fff3cd;
  border: 1px solid #ffe7a8;
  border-radius: 12px;
  padding: 0.85rem 1rem;
  font-size: 0.9rem;
  color: #8a6500;
  margin-bottom: 1rem;
}

.sr-detail-image-wrap,
.scan-detail-image-wrap {
  position: relative;
  width: 100%;
  margin: 1rem 0;
  background: #1a1a2e;
  border-radius: 12px;
  overflow: hidden;
}

.sr-detail-image-wrap img,
#scan-detail-image {
  display: block;
  width: 100%;
  height: auto;
}

.scan-detail-overlay {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.scan-detail-overlay circle {
  fill: rgba(34, 197, 94, 0.25);
  stroke: rgba(34, 197, 94, 0.95);
  stroke-width: 2;
  cursor: pointer;
}

.scan-detail-overlay circle.scan-bubble-empty {
  fill: transparent;
  stroke: rgba(255, 255, 255, 0.5);
  stroke-width: 1;
}

.scan-detail-overlay circle.scan-bubble-right { fill: rgba(34, 197, 94, 0.3); stroke: #22c55e; stroke-width: 3; }
.scan-detail-overlay circle.scan-bubble-wrong { fill: rgba(239, 68, 68, 0.25); stroke: #ef4444; stroke-width: 3; }
.scan-detail-overlay circle.scan-bubble-key { fill: rgba(21, 128, 61, 0.2); stroke: #15803d; stroke-width: 3; stroke-dasharray: 4 3; }
.scan-detail-overlay circle.scan-bubble-override { fill: rgba(245, 158, 11, 0.3); stroke: #f59e0b; stroke-width: 3; }

.scan-row-edited-badge {
  display: inline-block;
  font-size: 0.7rem;
  background: #f59e0b;
  color: #fff;
  border-radius: 4px;
  padding: 0.1rem 0.4rem;
  margin-left: 0.35rem;
  font-weight: 600;
  vertical-align: middle;
}

.scan-row-edited {
  fill: #f59e0b;
  font-size: 18px;
  font-family: 'Lexend Deca', system-ui, sans-serif;
  font-weight: 600;
}

.scan-detail-overlay rect.scan-row-ambiguous {
  fill: rgba(245, 158, 11, 0.08);
  stroke: #f59e0b;
  stroke-width: 2;
  rx: 8;
  ry: 8;
}

.scan-row-ambiguous {
  background: #fff8e1;
  border-left: 3px solid #f59e0b;
  padding: 0.5rem 0.75rem;
  border-radius: 6px;
}

.scan-detail-answers {
  margin: 1rem 0;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.scan-detail-answer-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.5rem 0.75rem;
  background: var(--scan-card);
  border: 1px solid var(--scan-border);
  border-radius: 10px;
  font-size: 0.9rem;
}

.scan-detail-answer-row .answer-label { font-weight: 600; min-width: 3rem; color: var(--scan-muted); }
.scan-detail-answer-row .answer-status { font-size: 0.75rem; font-weight: 600; padding: 0.12rem 0.45rem; border-radius: 4px; }
.scan-detail-answer-row .answer-status.right { background: #ddf6e4; color: #117a3a; }
.scan-detail-answer-row .answer-status.wrong { background: #fde2e2; color: #a31616; }

.scan-detail-answer-row input.scan-answer-edit {
  flex: 1;
  padding: 0.35rem 0.6rem;
  font-family: inherit;
  font-size: 0.9rem;
  border: 1px solid var(--scan-border);
  border-radius: 6px;
  background: var(--scan-bg);
}

.scan-detail-answer-row input.scan-answer-edit:focus {
  outline: 2px solid var(--scan-primary);
  border-color: transparent;
}

.scan-answer-edits {
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.scan-answer-edits h3 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--scan-primary);
  margin: 0 0 0.25rem;
}

.scan-answer-edit-row {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.5rem 0.75rem;
  background: var(--scan-card);
  border: 1px solid var(--scan-border);
  border-radius: 10px;
  font-size: 0.9rem;
}

.scan-answer-edit-row-edited {
  border-color: #f59e0b;
  background: #fffcf0;
}

.scan-answer-edit-label {
  font-weight: 600;
  min-width: 3rem;
  color: var(--scan-muted);
  white-space: nowrap;
}

.scan-answer-edit-row input[type="text"] {
  flex: 1;
  min-width: 0;
  padding: 0.35rem 0.6rem;
  font-family: inherit;
  font-size: 0.9rem;
  border: 1px solid var(--scan-border);
  border-radius: 6px;
  background: var(--scan-bg);
}

.scan-answer-edit-row input[type="text"]:focus {
  outline: 2px solid var(--scan-primary);
  border-color: transparent;
}

.scan-answer-key {
  font-size: 0.75rem;
  color: #15803d;
  font-weight: 600;
  white-space: nowrap;
}

.sr-detail-actions,
.scan-detail-actions {
  display: flex;
  gap: 0.75rem;
  justify-content: flex-end;
  margin: 1.5rem 0 2rem;
}

.sr-detail-actions .scan-btn,
.scan-detail-actions .scan-btn {
  min-width: 140px;
}

/* ---------------------------------------------------------------- responsive */

@media (max-width: 900px) {
  .scan-review-main { background: var(--scan-bg); }

  .scan-review-layout {
    display: block;
    height: auto;
    min-height: calc(100vh - 120px);
  }

  .sr-inbox {
    border-right: none;
    border-bottom: 1px solid var(--scan-border);
  }

  .sr-inbox-scroll { max-height: none; }

  .scan-review-layout.sr-detail-open .sr-inbox,
  .scan-review-layout.sr-detail-open .sr-detail-empty {
    display: none;
  }

  .scan-review-layout.sr-detail-open .sr-detail {
    display: block;
  }

  .sr-detail-content {
    min-height: calc(100vh - 120px);
  }

  .sr-detail-topbar {
    position: sticky;
    top: 0;
    z-index: 2;
  }

  .sr-detail-scroll {
    max-width: 40rem;
    padding: 1rem 0.75rem 4rem;
  }
}

@media (max-width: 600px) {
  .scan-review-layout {
    min-height: calc(100vh - 96px);
  }

  .sr-inbox-header,
  .sr-inbox-filters,
  .sr-inbox-scroll,
  .sr-inbox-footer {
    padding-left: 0.75rem;
    padding-right: 0.75rem;
  }

  .sr-chip-row { gap: 0.25rem; }
  .sr-chip { font-size: 0.68rem; padding: 0.15rem 0.4rem; }

  .scan-review-item {
    grid-template-columns: 52px minmax(0, 1fr);
    gap: 0.7rem;
  }

  .scan-review-thumb { width: 52px; height: 74px; }

  .scan-review-pill {
    grid-column: 2;
    justify-self: start;
  }

  .scan-answer-edit-row,
  .scan-detail-answer-row {
    align-items: stretch;
    flex-direction: column;
  }

  .scan-answer-key { white-space: normal; }

  .sr-detail-actions,
  .scan-detail-actions {
    justify-content: stretch;
  }

  .sr-detail-actions .scan-btn,
  .scan-detail-actions .scan-btn {
    width: 100%;
  }
}