/* Four-day score route: layer-first Anki UX on top of the existing app shell. */
.study-full-page .site-head { position: static; }

.study-layer-launcher {
  margin: 0 0 40px;
  padding: 22px;
  background: var(--panel);
  border: 1px solid var(--border-strong);
  border-radius: var(--r-panel);
}
.study-layer-launcher > header { max-width: 800px; margin-bottom: 18px; }
.study-layer-launcher > header h2 { margin: 4px 0 8px; }
.study-layer-launcher > header > p:last-child { margin: 0; color: var(--text-dim); }
.study-layer-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; }
.study-layer-card {
  min-width: 0;
  display: grid;
  grid-template-rows: auto 1fr auto auto;
  gap: 10px;
  padding: 17px;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--r-control);
}
.study-layer-card.is-primary {
  border-color: color-mix(in srgb, var(--accent) 68%, var(--border));
  border-left: 4px solid var(--accent);
}
.study-layer-code {
  margin: 0;
  color: var(--accent);
  font: 750 11px/1.3 "SFMono-Regular", Consolas, monospace;
  letter-spacing: .14em;
}
.study-layer-card h3 { margin: 0; color: var(--text); font-size: 19px; }
.study-layer-card strong {
  display: block;
  margin: 5px 0 8px;
  color: var(--accent-bright);
  font: 750 24px/1.2 "SFMono-Regular", Consolas, monospace;
  font-variant-numeric: tabular-nums;
}
.study-layer-card div > p { margin: 0; color: var(--text-dim); font-size: 13.5px; line-height: 1.7; }
.study-layer-card .study-layer-structure {
  margin-top: 12px;
  padding-top: 9px;
  color: var(--text);
  border-top: 1px solid var(--border);
  font: 650 10px/1.5 "SFMono-Regular", Consolas, monospace;
}
.study-layer-structure span { color: var(--text-muted); }
.study-layer-card button,
.study-task-order button,
.anki-layer-card button {
  min-height: 38px;
  padding: 8px 12px;
  color: var(--text);
  background: var(--panel-2);
  border: 1px solid var(--border-strong);
  border-radius: var(--r-control);
  font-family: inherit;
  font-size: 12px;
  font-weight: 700;
  line-height: 1.35;
  cursor: pointer;
  transition: border-color .18s ease, background .18s ease, transform .18s ease;
}
.study-layer-card.is-primary button {
  color: var(--on-accent);
  background: var(--accent);
  border-color: var(--accent);
}
.study-layer-card button:hover,
.study-task-order button:hover,
.anki-layer-card button:hover {
  border-color: var(--accent);
  transform: translateY(-1px);
}
.study-layer-card button:focus-visible,
.study-task-order button:focus-visible,
.anki-layer-card button:focus-visible {
  outline: none;
  box-shadow: var(--focus);
}
.study-layer-card button:disabled,
.study-task-order button:disabled,
.anki-layer-card button:disabled {
  color: var(--text-muted);
  background: var(--panel);
  border-color: var(--border);
  cursor: not-allowed;
  transform: none;
}
.study-layer-card .anki-route-state {
  min-height: 2.8em;
  margin: 0;
  color: var(--text-muted);
  font-size: 11.5px;
}

.study-strategy-decision { margin: 0 0 38px; }
.study-strategy-decision p:last-child { margin-bottom: 0; }
.study-sprint-brief {
  margin: 0 0 56px;
  padding: 20px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--r-panel);
}
.study-sprint-brief h2 { margin: 4px 0 16px; }
.study-sprint-steps { display: grid; gap: 10px; margin: 0; padding: 0; list-style: none; }
.study-sprint-steps > li {
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr);
  gap: 12px;
  padding: 13px 14px;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--r-control);
}
.study-sprint-steps > li > span,
.study-task-label > span {
  color: var(--accent);
  font: 750 11px/1.6 "SFMono-Regular", Consolas, monospace;
  font-variant-numeric: tabular-nums;
}
.study-sprint-steps b { color: var(--text); }
.study-sprint-steps p,
.study-sprint-steps ul { margin: 5px 0 0; color: var(--text-dim); font-size: 13.5px; }
.study-sprint-steps ul { padding-left: 20px; }

.study-day-group {
  overflow: clip;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--r-panel);
}
.study-day-group > summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 17px 19px;
  color: var(--text);
  background: var(--panel);
  cursor: pointer;
  list-style: none;
}
.study-day-group > summary::-webkit-details-marker { display: none; }
.study-day-group > summary::before {
  content: "▸";
  flex: 0 0 auto;
  color: var(--accent);
  font-family: monospace;
  transition: transform .18s ease;
}
.study-day-group[open] > summary::before { transform: rotate(90deg); }
.study-day-group > summary > div { flex: 1; min-width: 0; }
.study-day-group > summary h2 { margin: 3px 0 0; font-size: 21px; }
.study-day-group > summary > span {
  flex: 0 0 auto;
  color: var(--text-muted);
  font: 650 11px/1.4 "SFMono-Regular", Consolas, monospace;
  font-variant-numeric: tabular-nums;
}
.study-day-group > .study-module-grid { padding: 14px; }

.study-sprint-card { display: block; padding: 18px; }
.study-sprint-card > header {
  display: grid;
  grid-template-columns: 54px minmax(0, 1fr);
  gap: 12px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border);
}
.study-sprint-card h3 { margin: 0; }
.study-sprint-card h3 a { color: var(--text); text-decoration: none; }
.study-sprint-card h3 a:hover { color: var(--accent-bright); }
.study-legacy-code {
  margin: 0 0 3px !important;
  color: var(--text-muted) !important;
  font: 650 10px/1.35 "SFMono-Regular", Consolas, monospace !important;
  letter-spacing: .08em;
}
.study-sprint-card.is-conditional { border-left: 3px solid var(--warn); }
.study-sprint-card.is-defer { border-left: 3px solid var(--text-muted); }
.study-task-order {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
}
.study-task-order > li {
  min-width: 0;
  padding: 13px;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--r-control);
}
.study-task-label { display: flex; align-items: center; gap: 8px; margin-bottom: 8px; }
.study-task-label b { color: var(--text); font-size: 14px; }
.study-task-order ul { margin: 0; padding-left: 18px; color: var(--text-dim); font-size: 12.5px; line-height: 1.65; }
.study-task-order p { margin: 0 0 10px; font-size: 12.5px; }
.study-task-order button { width: 100%; }
.study-card-layer-counts strong,
.study-card-layer-counts span { display: block; }
.study-card-layer-counts strong { color: var(--accent-bright); }
.study-card-layer-counts span { margin-top: 4px; color: var(--text-muted); font-family: "SFMono-Regular", Consolas, monospace; }
.study-resource-link { color: var(--accent-bright); font-size: 12.5px; font-weight: 700; text-decoration: none; }
.study-resource-link:hover { text-decoration: underline; }
.study-resource-link:focus-visible { outline: none; box-shadow: var(--focus); border-radius: 4px; }
.study-task-check {
  display: flex;
  align-items: center;
  gap: 9px;
  margin-top: 12px;
  color: var(--text-muted);
  font-size: 12px;
  cursor: pointer;
}
.study-task-check input { width: 17px; height: 17px; accent-color: var(--accent); }

.anki-route-intro { margin: 0 0 16px; color: var(--text-dim); }
.anki-route-card { padding: 16px; background: var(--panel); border: 1px solid var(--border); border-radius: var(--r-panel); }
.anki-layer-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; }
.anki-layer-card {
  min-width: 0;
  display: grid;
  grid-template-rows: auto auto 1fr auto;
  padding: 14px;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--r-control);
}
.anki-layer-card.is-primary { border-left: 4px solid var(--accent); }
.anki-layer-path { display: flex; flex-wrap: wrap; gap: 5px; margin: 0 0 8px; color: var(--text-muted); font: 650 10px/1.45 "SFMono-Regular", Consolas, monospace; }
.anki-layer-path span:first-child { color: var(--accent); }
.anki-layer-path b { color: var(--border-strong); }
.anki-layer-card > strong { color: var(--accent-bright); font: 750 20px/1.3 "SFMono-Regular", Consolas, monospace; font-variant-numeric: tabular-nums; }
.anki-layer-card > p:not(.anki-layer-path) { color: var(--text-dim); font-size: 12.5px; line-height: 1.65; }
.anki-route-card > .anki-route-state { margin: 12px 2px 0; color: var(--text-muted); font-size: 12px; }
.anki-route-state.is-connected { color: var(--good); }

html[data-reading-scale="1.5"] .study-layer-grid,
html[data-reading-scale="1.75"] .study-layer-grid,
html[data-reading-scale="2"] .study-layer-grid,
html[data-reading-scale="1.5"] .study-task-order,
html[data-reading-scale="1.75"] .study-task-order,
html[data-reading-scale="2"] .study-task-order,
html[data-reading-scale="1.5"] .anki-layer-grid,
html[data-reading-scale="1.75"] .anki-layer-grid,
html[data-reading-scale="2"] .anki-layer-grid,
html[data-reading-scale="1.5"] .study-module-grid,
html[data-reading-scale="1.75"] .study-module-grid,
html[data-reading-scale="2"] .study-module-grid { grid-template-columns: 1fr; }

@media (max-width: 900px) {
  .study-layer-grid, .study-task-order, .anki-layer-grid { grid-template-columns: 1fr; }
}

@media (max-width: 680px) {
  .study-layer-launcher { padding: 16px; }
  .study-day-group > summary { align-items: flex-start; padding: 15px; }
  .study-day-group > summary > span { white-space: normal; text-align: right; }
  .study-day-group > summary h2 { font-size: 18px; }
  .study-sprint-card > header { grid-template-columns: 46px minmax(0, 1fr); }
}

@media (prefers-reduced-motion: reduce) {
  .study-layer-card button,
  .study-task-order button,
  .anki-layer-card button,
  .study-day-group > summary::before { transition: none; }
}

@media print {
  .study-layer-launcher, .study-sprint-brief, .study-day-group, .anki-route-card { background: transparent; }
  .study-layer-card button, .study-task-order button, .anki-layer-card button, .study-task-check, .anki-route-state { display: none !important; }
  .study-layer-grid, .study-task-order, .anki-layer-grid, .study-module-grid { grid-template-columns: 1fr; }
  .study-day-group > .study-module-grid { display: grid !important; }
}