.checkpoint-page .app-shell {
  max-width: 1240px;
}
.checkpoint-back {
  color: var(--muted);
  font-size: 13px;
  text-decoration: none;
}
.checkpoint-page .checkpoint-back {
  margin-left: auto;
}
.checkpoint-heading {
  padding: 44px 0 30px;
}
.checkpoint-heading h1 {
  font:
    italic 52px Georgia,
    serif;
  letter-spacing: -2px;
  margin: 10px 0 14px;
}
.checkpoint-heading p {
  color: var(--muted);
  line-height: 1.6;
  max-width: 610px;
  margin: 0;
}
.checkpoint-layout {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  gap: 28px;
  padding-bottom: 60px;
  align-items: start;
}
.checkpoint-page fieldset {
  border: 0;
  margin: 0;
  padding: 0;
  min-width: 0;
}
.checkpoint-page legend {
  font: 11px monospace;
  letter-spacing: 1px;
  color: var(--muted);
  margin-bottom: 14px;
  text-transform: uppercase;
}
.checkpoint-chapter {
  position: relative;
  display: flex;
  gap: 14px;
  align-items: center;
  border: 1px solid transparent;
  border-bottom-color: var(--border);
  padding: 14px 13px;
  cursor: pointer;
}
.checkpoint-chapter:has(input:checked) {
  background: var(--panel-light);
  border-color: var(--accent);
  border-radius: 5px;
}
.checkpoint-chapter input,
.checkpoint-moments input {
  position: absolute;
  opacity: 0;
  width: 1px;
  height: 1px;
}
.checkpoint-page label:has(input[type='radio']:focus-visible) {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}
.chapter-number {
  color: var(--muted);
  font: 12px monospace;
}
.checkpoint-chapter strong {
  display: block;
  font-size: 14px;
  font-weight: 500;
}
.checkpoint-chapter small {
  display: block;
  color: var(--muted);
  font-size: 11px;
  margin-top: 5px;
}
.chapter-arrow {
  margin-left: auto;
  color: var(--accent);
  opacity: 0;
}
.checkpoint-chapter:has(input:checked) .chapter-arrow {
  opacity: 1;
}
.checkpoint-detail {
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--panel);
}
.checkpoint-scene {
  position: relative;
  background: var(--lcd3);
  border-bottom: 1px solid var(--border);
}
.checkpoint-scene canvas {
  display: block;
  width: 100%;
  height: 240px;
  object-fit: cover;
  image-rendering: pixelated;
}
.checkpoint-scene-caption {
  position: absolute;
  left: 16px;
  bottom: 16px;
  display: grid;
  gap: 5px;
  padding: 11px 15px;
  color: var(--lcd3);
  background: var(--lcd0);
  border: 1px solid var(--lcd2);
}
.checkpoint-scene-caption span {
  font: 10px monospace;
  text-transform: uppercase;
  letter-spacing: 1px;
}
.checkpoint-scene-caption strong {
  font:
    18px Georgia,
    serif;
}
.checkpoint-detail-body {
  padding: 25px;
}
.checkpoint-moments > div {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.checkpoint-moments label {
  position: relative;
  cursor: pointer;
}
.checkpoint-moments span {
  display: block;
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 10px 12px;
  color: var(--muted);
  font-size: 12px;
}
.checkpoint-moments input:checked + span {
  color: var(--bg);
  background: var(--accent);
  border-color: var(--accent);
}
.checkpoint-detail h2 {
  margin: 25px 0 10px;
  font:
    28px Georgia,
    serif;
}
.checkpoint-description {
  font-size: 14px;
  line-height: 1.65;
  margin: 0;
  max-width: 620px;
}
.checkpoint-stats {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  font: 11px monospace;
  color: var(--accent);
  margin: 19px 0 12px;
}
.checkpoint-preset,
.checkpoint-policy {
  color: var(--muted);
  font-size: 12px;
  line-height: 1.65;
}
.checkpoint-policy {
  margin: 14px 0 0;
}
#checkpoint-form {
  border-top: 1px solid var(--border);
  margin-top: 22px;
  padding-top: 20px;
}
#checkpoint-form > label {
  display: block;
  font-size: 12px;
  margin-bottom: 9px;
}
.checkpoint-start-row {
  display: flex;
  gap: 10px;
}
#checkpoint-name {
  min-width: 0;
  flex: 1;
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 12px;
  background: var(--bg);
  color: var(--ink);
  font:
    13px Arial,
    sans-serif;
}
#checkpoint-name:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
#checkpoint-start {
  display: flex;
  align-items: center;
  gap: 18px;
  justify-content: space-between;
  border-radius: 4px;
  background: var(--accent);
  color: var(--bg);
  padding: 13px 16px;
  font-size: 12px;
  font-weight: 600;
}
.checkpoint-existing {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px;
  color: var(--muted);
  font-size: 11px;
  border-top: 1px solid var(--border);
  padding-top: 13px;
  margin-top: 16px;
}
#checkpoint-error {
  font-size: 13px;
  line-height: 1.6;
  padding: 12px;
  border-left: 3px solid #e7ba8f;
  background: var(--bg);
}
@media (max-width: 760px) {
  .checkpoint-heading {
    padding-top: 28px;
  }
  .checkpoint-heading h1 {
    font-size: 40px;
  }
  .checkpoint-layout {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .checkpoint-chapters {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .checkpoint-chapter {
    padding: 10px 7px;
    gap: 7px;
  }
  .checkpoint-chapter strong {
    font-size: 12px;
  }
  .chapter-arrow {
    display: none;
  }
  .checkpoint-scene canvas {
    height: auto;
  }
  .checkpoint-detail-body {
    padding: 19px;
  }
  .checkpoint-start-row {
    flex-direction: column;
  }
}
@media (max-width: 400px) {
  .checkpoint-chapters {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}