:root {
  color-scheme: light;
  --bg: #f4f7fb;
  --panel: #ffffff;
  --ink: #172033;
  --muted: #5f6b7a;
  --accent: #176d8f;
  --line: #d9e2ec;
  --soft: #eaf3f7;
}

.site-footer {
  display: flex;
  justify-content: center;
  gap: 1rem;
  padding: 1.25rem 0 0.5rem;
  font-size: 0.9rem;
}

.site-footer a {
  color: #176d8f;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", Arial, sans-serif;
  background: var(--bg);
  color: var(--ink);
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 20px 10px;
}

h1 {
  margin: 0;
  font-size: 24px;
  line-height: 1.2;
}

.topbar p {
  margin: 4px 0 0;
  color: var(--muted);
}

.status {
  min-width: 230px;
  padding: 8px 12px;
  border: 1px solid var(--line);
  background: var(--soft);
  color: #0f526d;
  font-weight: 700;
  text-align: right;
}

.workspace {
  padding: 0 16px 16px;
}

.controls,
.marking {
  display: flex;
  align-items: end;
  gap: 10px;
  flex-wrap: wrap;
  padding: 12px;
  margin-bottom: 10px;
  background: var(--panel);
  border: 1px solid var(--line);
}

label {
  display: grid;
  gap: 4px;
  color: var(--muted);
  font-size: 12px;
}

label.inline {
  grid-template-columns: auto 80px;
  align-items: center;
}

input,
select,
button,
textarea {
  font: inherit;
}

input,
select {
  min-height: 34px;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
  padding: 5px 8px;
}

button {
  min-height: 34px;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
  padding: 6px 10px;
  cursor: pointer;
}

button.primary {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
  font-weight: 700;
}

.main-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 380px;
  gap: 10px;
}

.canvas-panel,
.results {
  background: var(--panel);
  border: 1px solid var(--line);
  min-height: 70vh;
}

.canvas-panel {
  overflow: auto;
}

canvas {
  display: block;
  background: #fff;
}

.results {
  padding: 12px;
}

h2 {
  margin: 0 0 6px;
  font-size: 14px;
  color: #0f526d;
}

textarea {
  width: 100%;
  height: 150px;
  margin-bottom: 12px;
  resize: vertical;
  border: 1px solid var(--line);
  padding: 8px;
  background: #fbfdff;
}

pre {
  min-height: 140px;
  max-height: 280px;
  overflow: auto;
  border: 1px solid var(--line);
  background: #fbfdff;
  padding: 8px;
  white-space: pre-wrap;
}

.check {
  display: flex;
  align-items: center;
  gap: 7px;
  min-height: 34px;
}

.check input {
  min-height: auto;
}

.result-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 14px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 12px;
}

.collection-panel {
  margin-top: 12px;
  padding: 16px;
  background: var(--panel);
  border: 1px solid var(--line);
}

.collection-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: end;
  gap: 8px;
  margin: 12px 0;
}

.paper-gallery {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(240px, 320px);
  gap: 12px;
  overflow-x: auto;
  padding: 4px 2px 14px;
  scroll-snap-type: x proximity;
}

.paper-card {
  scroll-snap-align: start;
  border: 1px solid var(--line);
  background: #fbfdff;
  padding: 10px;
}

.paper-card img {
  display: block;
  width: 100%;
  height: 220px;
  object-fit: contain;
  background: #fff;
}

.paper-card textarea {
  height: 90px;
}

.feature-card {
  background: var(--panel);
  border: 1px solid var(--line);
  padding: 16px;
}

.feature-card label {
  margin: 10px 0;
}

.feature-card input,
.feature-card textarea {
  width: 100%;
}

.feature-card textarea {
  min-height: 120px;
}

.button-label {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 6px 10px;
  border: 1px solid var(--line);
  color: var(--ink);
  cursor: pointer;
}

.button-label input {
  display: none;
}

#historyList {
  max-height: 260px;
  overflow: auto;
  padding-left: 24px;
}

.small {
  color: var(--muted);
  font-size: 12px;
}

dialog {
  width: min(760px, 92vw);
  border: 0;
  padding: 20px;
  box-shadow: 0 20px 80px #0005;
}

dialog::backdrop {
  background: #102e3588;
}

#cameraVideo {
  width: 100%;
  max-height: 65vh;
  background: #111;
}

@media (max-width: 920px) {
  .topbar {
    display: block;
  }

  .status {
    margin-top: 10px;
    text-align: left;
  }

  .main-grid {
    grid-template-columns: 1fr;
  }

  .feature-grid {
    grid-template-columns: 1fr;
  }
}