:root {
  color-scheme: light;
  --bg: #f5f7f6;
  --surface: #ffffff;
  --surface-strong: #eef4f0;
  --ink: #18231f;
  --muted: #5b6762;
  --line: #cdd7d2;
  --accent: #14796f;
  --accent-strong: #0b5f57;
  --accent-soft: #dcefeb;
  --warning: #b94b48;
  --warning-soft: #fae4e2;
  --gold: #b28d16;
  --shadow: 0 18px 45px rgba(24, 35, 31, 0.12);
  --radius: 8px;
  --sidebar-width: 320px;
  --workspace-max-width: 1680px;
  --image-stage-height: clamp(240px, 46vh, 560px);
  --multi-image-stage-height: clamp(128px, 20vh, 230px);
  --single-image-max-height: 980px;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--ink);
}

button,
input,
textarea {
  font: inherit;
}

button {
  min-height: 42px;
  border: 1px solid var(--accent);
  border-radius: var(--radius);
  background: var(--accent);
  color: #fff;
  cursor: pointer;
  font-weight: 700;
  letter-spacing: 0;
  padding: 0.7rem 1rem;
  transition: background 150ms ease, border-color 150ms ease, transform 150ms ease;
}

button:hover {
  background: var(--accent-strong);
  border-color: var(--accent-strong);
}

button:active {
  transform: translateY(1px);
}

button:disabled {
  background: #d7dfdb;
  border-color: #c8d1cc;
  color: #707b76;
  cursor: not-allowed;
  transform: none;
}

button.secondary {
  background: #fff;
  border-color: var(--line);
  color: var(--ink);
}

button.secondary:hover {
  border-color: var(--accent);
  color: var(--accent-strong);
}

button.danger {
  background: #fff;
  border-color: #e0aca8;
  color: #8d2e2b;
}

button.danger:hover {
  background: var(--warning-soft);
  border-color: var(--warning);
}

input,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  color: var(--ink);
  padding: 0.72rem 0.82rem;
}

textarea {
  min-height: 96px;
  resize: vertical;
}

input:focus,
textarea:focus,
button:focus-visible {
  outline: 3px solid rgba(20, 121, 111, 0.26);
  outline-offset: 2px;
}

.app-shell {
  display: grid;
  grid-template-columns: minmax(272px, var(--sidebar-width)) minmax(0, 1fr);
  min-height: 100vh;
}

.app-shell.sidebar-collapsed {
  grid-template-columns: minmax(0, 1fr);
}

.sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  overflow: auto;
  border-right: 1px solid var(--line);
  background: #fbfcfb;
  padding: 1rem;
}

.app-shell.sidebar-collapsed .sidebar {
  display: none;
}

.sidebar-actions {
  display: flex;
  justify-content: flex-end;
}

.sidebar-toggle,
.sidebar-restore {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  min-width: 42px;
  min-height: 42px;
  padding: 0;
  border-color: var(--line);
  background: #fff;
  color: var(--ink);
  font-size: 1.35rem;
  line-height: 1;
}

.sidebar-toggle:hover,
.sidebar-restore:hover {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--accent-strong);
}

.sidebar-restore {
  position: fixed;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 30;
  display: none;
  box-shadow: var(--shadow);
}

.app-shell.sidebar-collapsed + .sidebar-restore {
  display: inline-flex;
}

.progress-panel,
.nav-panel {
  margin-top: 1rem;
}

.progress-panel {
  margin-top: 0.75rem;
}

.sync-text,
.helper-text {
  color: var(--muted);
  font-size: 0.88rem;
  line-height: 1.5;
  margin: 0.55rem 0 0;
}

.progress-row {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  font-size: 0.94rem;
}

.progress-track {
  height: 10px;
  margin-top: 0.6rem;
  overflow: hidden;
  border-radius: 999px;
  background: #dfe7e3;
}

.progress-bar {
  width: 0%;
  height: 100%;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--accent), var(--gold));
  transition: width 180ms ease;
}

.nav-panel {
  display: grid;
  gap: 1rem;
}

.nav-section {
  display: grid;
  gap: 0.55rem;
}

.nav-section summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 34px;
  color: var(--muted);
  cursor: pointer;
  font-size: 0.84rem;
  font-weight: 800;
  letter-spacing: 0;
  list-style: none;
  text-transform: uppercase;
}

.nav-section summary::-webkit-details-marker {
  display: none;
}

.nav-section summary::after {
  content: "+";
  color: var(--muted);
  font-size: 1rem;
  line-height: 1;
}

.nav-section[open] summary::after {
  content: "-";
}

.nav-section summary:focus-visible {
  outline: 3px solid rgba(20, 121, 111, 0.26);
  outline-offset: 2px;
}

.nav-panel h2 {
  margin: 0 0 0.55rem;
  color: var(--muted);
  font-size: 0.84rem;
  letter-spacing: 0;
  text-transform: uppercase;
}

.nav-list {
  display: grid;
  gap: 0.42rem;
}

.trial-list {
  max-height: 48vh;
  overflow: auto;
  padding-right: 0.2rem;
}

.nav-item {
  display: grid;
  grid-template-columns: 1rem 1fr auto;
  align-items: center;
  gap: 0.55rem;
  width: 100%;
  min-height: 38px;
  padding: 0.55rem 0.65rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  color: var(--ink);
  text-align: left;
  font-weight: 700;
}

.nav-item:hover,
.nav-item.active {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--ink);
}

.status-dot {
  width: 0.58rem;
  height: 0.58rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #fff;
}

.status-dot.visited,
.status-dot.complete {
  background: var(--accent);
  border-color: var(--accent);
}

.status-dot.pending-sync {
  background: var(--gold);
  border-color: var(--gold);
}

.nav-meta {
  color: var(--muted);
  font-size: 0.76rem;
  font-weight: 800;
}

.main-view {
  min-width: 0;
  padding: 0.7rem 1rem 1.2rem;
}

.workspace {
  max-width: var(--workspace-max-width);
  margin: 0 auto;
}

.sample-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(360px, 460px);
  gap: 1rem;
  align-items: start;
}

.question-column {
  position: sticky;
  top: 0.7rem;
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
  gap: 0.7rem;
  height: calc(100vh - 1.4rem);
  max-height: calc(100vh - 1.4rem);
  min-height: 0;
  overflow: hidden;
  padding-bottom: 0.2rem;
}

.workspace-header {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 0.8rem;
  align-items: center;
  margin-bottom: 0.45rem;
}

.sample-counter {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 800;
  letter-spacing: 0;
}

.header-actions,
.stage-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  justify-content: flex-end;
}

.image-viewer {
  display: grid;
  gap: 0.55rem;
  position: sticky;
  top: 0.7rem;
  z-index: 8;
  height: calc(100vh - 1.4rem);
  max-height: calc(100vh - 1.4rem);
  overflow: hidden;
}

.image-view-content {
  min-width: 0;
  min-height: 0;
}

.image-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.6rem;
  align-items: start;
}

.image-grid.single {
  grid-template-columns: minmax(0, 1fr);
}

.image-grid.pair {
  grid-template-columns: minmax(0, 1fr);
}

.image-grid.multi {
  height: calc(100vh - 1.4rem);
  max-height: calc(100vh - 1.4rem);
  overflow-y: auto;
  overscroll-behavior: contain;
  padding-right: 0.25rem;
}

.image-grid.multi .original-image-frame {
  position: sticky;
  top: 0;
  z-index: 2;
  background: var(--bg);
  padding-bottom: 0.15rem;
}

.image-frame {
  min-width: 0;
}

.image-frame figure {
  margin: 0;
}

.image-frame figcaption {
  margin: 0 0 0.28rem;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 800;
  line-height: 1.25;
}

.image-frame img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #e6ece8;
  box-shadow: var(--shadow);
}

.missing-image-panel {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: var(--image-stage-height);
  aspect-ratio: auto;
  border: 1px dashed var(--warning);
  border-radius: var(--radius);
  background: var(--warning-soft);
  color: #8d2e2b;
  font-weight: 800;
  line-height: 1.5;
  overflow-wrap: anywhere;
  padding: 1rem;
  text-align: center;
}

.image-grid.single img {
  max-height: var(--single-image-max-height);
}

.image-grid.multi .image-frame img,
.image-grid.multi .missing-image-panel {
  height: var(--multi-image-stage-height);
  object-fit: contain;
}

.image-grid.multi .original-image-frame img {
  border: 3px solid var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft), var(--shadow);
}

.image-grid.multi .original-image-frame .missing-image-panel {
  border: 3px dashed var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft), var(--shadow);
}

.sample-question-progress {
  border: 0;
  border-radius: var(--radius);
  background: transparent;
  padding: 0;
}

.question-progress-steps {
  display: grid;
  grid-template-columns: repeat(var(--question-step-count), minmax(0, 1fr));
  gap: 0.24rem;
}

button.question-progress-step {
  min-height: 26px;
  border-color: var(--line);
  background: #fff;
  color: var(--ink);
  font-size: 0.74rem;
  padding: 0.2rem 0.28rem;
}

button.question-progress-step:hover {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--accent-strong);
}

button.question-progress-step.answered {
  border-color: var(--accent);
  background: var(--accent);
  color: #fff;
}

button.question-progress-step.current {
  border-color: var(--gold);
  box-shadow: 0 0 0 3px rgba(178, 141, 22, 0.2);
}

button.question-progress-step.active {
  border-color: var(--gold);
  box-shadow: 0 0 0 3px rgba(178, 141, 22, 0.28);
}

button.question-progress-step.optional {
  border-style: dashed;
  color: var(--muted);
}

button.question-progress-step.locked,
button.question-progress-step:disabled {
  border-color: #c8d1cc;
  background: #eef2ef;
  color: #707b76;
}

.sentence-panel,
.completion-panel {
  margin-top: 0.85rem;
  border-left: 5px solid var(--accent);
  background: var(--surface-strong);
  border-radius: var(--radius);
  padding: 0.75rem 0.9rem;
}

.question-column .sentence-panel {
  margin-top: 0;
}

.image-viewer .sentence-panel {
  margin-top: 0;
  box-shadow: 0 8px 18px rgba(24, 35, 31, 0.08);
}

.sentence-panel h3,
.completion-panel h3 {
  margin: 0 0 0.45rem;
  font-size: 1rem;
}

.sentence-panel p,
.completion-panel p {
  margin: 0;
  color: var(--ink);
  line-height: 1.7;
}

.question-stage {
  margin-top: 0;
}

.image-question-stage {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto;
  height: 100%;
  min-height: 0;
  overflow: hidden;
}

.guideline-page {
  display: grid;
  gap: 0.9rem;
}

.guideline-hero,
.guideline-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  padding: 1rem 1.1rem;
}

.guideline-hero {
  background:
    linear-gradient(135deg, rgba(20, 121, 111, 0.08), rgba(178, 141, 22, 0.1)),
    var(--surface);
}

.guideline-page-title {
  margin: 0;
  font-size: clamp(1.7rem, 3vw, 2.35rem);
  line-height: 1.1;
}

.guideline-card h2 {
  margin: 0 0 0.55rem;
  font-size: 1.05rem;
}

.guideline-card p {
  margin: 0.45rem 0 0;
  line-height: 1.7;
}

.guideline-main-card {
  border-left: 5px solid var(--accent);
}

.guideline-list {
  display: grid;
  gap: 0.45rem;
  margin: 0.65rem 0 0;
  padding-left: 1.2rem;
  line-height: 1.6;
}

.guideline-warning {
  border-radius: var(--radius);
  background: var(--warning-soft);
  color: #8d2e2b;
  font-weight: 800;
  padding: 0.75rem 0.85rem;
}

.guideline-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.9rem;
}

.guideline-do-card {
  border-top: 4px solid #2f7d3d;
}

.guideline-dont-card {
  border-top: 4px solid var(--warning);
}

.guideline-actions {
  margin-top: -0.1rem;
}

.stage-heading {
  display: flex;
  justify-content: space-between;
  gap: 0.8rem;
  align-items: end;
  margin-bottom: 0.55rem;
}

.stage-heading h3 {
  margin: 0;
  font-size: 1.05rem;
}

.stage-heading p {
  margin: 0.15rem 0 0;
  color: var(--muted);
  font-size: 0.88rem;
  line-height: 1.5;
}

.question-list {
  display: grid;
  gap: 0.55rem;
  min-height: 0;
}

.image-question-stage .question-list {
  grid-template-rows: minmax(0, 1fr);
  overflow: hidden;
}

.image-question-stage .question-card.active {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
  height: 100%;
  min-height: 0;
  overflow: hidden;
}

.image-question-stage .question-pager {
  flex: 0 0 auto;
}

.image-question-list {
  display: grid;
  gap: 0.6rem;
  min-height: 0;
  overflow-y: auto;
  overscroll-behavior: contain;
  padding-right: 0.25rem;
}

.image-answer-row {
  display: grid;
  gap: 0.45rem;
  min-height: var(--multi-image-stage-height);
  align-content: start;
}

.image-question-top-spacer {
  height: 0;
  min-height: 0;
  pointer-events: none;
}

.image-question-label {
  margin: 0;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 900;
  line-height: 1.25;
}

.image-question-card {
  padding: 0.65rem;
}

.image-question-card textarea {
  min-height: 86px;
  resize: vertical;
}

.question-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  padding: 0.75rem;
}

.question-card[hidden] {
  display: none;
}

.question-card-target {
  border-color: var(--gold);
  box-shadow: 0 0 0 3px rgba(178, 141, 22, 0.2);
}

.question-pager {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 0.55rem;
  align-items: center;
  margin-top: 0.55rem;
}

.question-pager-status {
  color: var(--muted);
  font-size: 0.84rem;
  font-weight: 800;
  text-align: center;
}

.question-card legend,
.question-label {
  display: block;
  margin: 0 0 0.55rem;
  color: var(--ink);
  font-weight: 800;
  line-height: 1.35;
}

.reason-label {
  margin: 0.65rem 0 0;
  color: var(--muted);
  font-weight: 800;
}

.reason-textarea {
  min-height: 60px;
  margin-top: 0.35rem;
  background: #fbfcfb;
}

.grid-text-question {
  display: grid;
  gap: 0.7rem;
}

.grid-text-table {
  display: grid;
  grid-template-columns: minmax(112px, 0.55fr) repeat(var(--grid-text-column-count), minmax(140px, 1fr));
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--line);
  gap: 1px;
}

.grid-text-header,
.grid-text-cell {
  background: #fff;
  padding: 0.65rem;
}

.grid-text-header {
  display: flex;
  align-items: center;
  color: var(--ink);
  font-size: 0.82rem;
  font-weight: 800;
  line-height: 1.3;
}

.grid-text-row-header {
  background: #fbfcfb;
}

.grid-text-cell textarea {
  min-height: 78px;
  min-width: 132px;
  resize: vertical;
}

.required-mark {
  color: var(--warning);
  font-weight: 900;
}

.choice-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.choice-option {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  min-height: 40px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  padding: 0.55rem 0.7rem;
  cursor: pointer;
  font-size: 0.88rem;
  line-height: 1.4;
}

.choice-option:has(input:checked) {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--accent-strong);
  font-weight: 800;
}

.choice-list input {
  position: absolute;
  opacity: 0;
  width: 1px;
  height: 1px;
  pointer-events: none;
}

.choice-option.choice-option-fine {
  border-color: #64a468;
  background: #eef8ef;
  color: #1d5c2a;
}

.choice-option.choice-option-fine:has(input:checked) {
  border-color: #2f7d3d;
  background: #2f7d3d;
  color: #fff;
}

.choice-option.choice-option-okay {
  border-color: #d0b244;
  background: #fff6cf;
  color: #6c5500;
}

.choice-option.choice-option-okay:has(input:checked) {
  border-color: #d6ae00;
  background: #f0c419;
  color: #3f2f00;
}

.choice-option.choice-option-bad {
  border-color: #d66a62;
  background: #fdeceb;
  color: #8a1f18;
}

.choice-option.choice-option-bad:has(input:checked) {
  border-color: #c74036;
  background: #c74036;
  color: #fff;
}

.toast {
  position: fixed;
  right: 1rem;
  bottom: 1rem;
  z-index: 20;
  max-width: min(420px, calc(100vw - 2rem));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  box-shadow: var(--shadow);
  color: var(--ink);
  padding: 0.85rem 1rem;
  opacity: 0;
  pointer-events: none;
  transform: translateY(12px);
  transition: opacity 160ms ease, transform 160ms ease;
}

.toast.visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 980px) {
  .app-shell {
    grid-template-columns: 1fr;
  }

  .app-shell.sidebar-collapsed {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: relative;
    height: auto;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .app-shell.sidebar-collapsed .sidebar {
    display: none;
  }

  .trial-list {
    max-height: 280px;
  }

  .main-view {
    padding: 0.7rem 0.9rem 1rem;
  }

  .sample-layout {
    grid-template-columns: 1fr;
  }

  .image-viewer,
  .question-column {
    position: relative;
    top: auto;
    height: auto;
    max-height: none;
    overflow: visible;
  }

  .image-question-stage,
  .image-question-stage .question-card.active {
    height: auto;
    overflow: visible;
  }

  .image-grid.multi {
    height: auto;
    max-height: none;
    overflow: visible;
    padding-right: 0;
  }

  .image-question-list {
    max-height: none;
    overflow: visible;
    padding-right: 0;
  }

  .image-grid.multi .original-image-frame {
    position: relative;
  }

}

@media (max-width: 720px) {
  .workspace-header,
  .image-grid,
  .guideline-grid {
    grid-template-columns: 1fr;
  }

  .image-viewer .image-grid:not(.single) {
    grid-template-columns: 1fr;
  }

  .image-viewer .image-frame img,
  .image-viewer .missing-image-panel {
    height: auto;
  }

  .image-viewer .image-grid.multi .image-frame img,
  .image-viewer .image-grid.multi .missing-image-panel {
    height: auto;
  }

  .header-actions,
  .stage-actions {
    justify-content: stretch;
  }

  .header-actions > button,
  .stage-actions button {
    width: 100%;
  }

  .stage-heading {
    display: block;
  }

  .question-pager {
    grid-template-columns: 1fr;
  }

  .question-pager button {
    width: 100%;
  }

  .choice-list {
    display: grid;
  }
}