.shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: var(--rail-width) minmax(0, 1fr);
  grid-template-rows: var(--mast-height) minmax(0, 1fr);
  grid-template-areas:
    "mast mast"
    "rail stage";
}

.mast {
  grid-area: mast;
  position: sticky;
  top: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 0 22px;
  height: var(--mast-height);
  background: color-mix(in srgb, var(--paper) 86%, transparent);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--rule);
}

.mark {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  min-width: 0;
}

.mark img {
  width: 34px;
  height: 34px;
  border-radius: 8px;
  object-fit: cover;
  border: 1px solid var(--rule-strong);
}

.mark-text {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 600;
}

.mark-text em {
  font-style: italic;
  color: var(--forest);
  font-weight: 500;
}

.pathbar {
  display: none;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--ink-faint);
  letter-spacing: 0.02em;
}

.mast-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.icon-btn {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  border: 1px solid var(--rule);
  background: var(--card);
  border-radius: 10px;
  cursor: pointer;
  color: var(--ink-soft);
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease), transform 0.2s var(--ease);
}

.icon-btn:hover {
  border-color: var(--forest);
  color: var(--forest);
  transform: translateY(-1px);
}

.search-chip {
  display: none;
  align-items: center;
  gap: 10px;
  height: 40px;
  padding: 0 12px 0 14px;
  border: 1px solid var(--rule);
  background: var(--card);
  border-radius: 999px;
  color: var(--ink-faint);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  cursor: pointer;
}

.search-chip kbd {
  font: inherit;
  border: 1px solid var(--rule);
  border-radius: 6px;
  padding: 2px 6px;
  color: var(--ink-soft);
}

.rail {
  grid-area: rail;
  position: sticky;
  top: var(--mast-height);
  height: calc(100vh - var(--mast-height));
  overflow: auto;
  padding: 22px 16px 32px;
  border-right: 1px solid var(--rule);
  background: color-mix(in srgb, var(--paper) 70%, transparent);
}

.rail-clock {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin: 0 10px 18px;
}

.rail-group {
  margin-bottom: 22px;
}

.rail-group h2 {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-faint);
  font-weight: 500;
  margin: 0 10px 8px;
}

.rail a {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
  text-decoration: none;
  padding: 9px 10px;
  border-radius: 10px;
  color: var(--ink-soft);
  font-size: 0.95rem;
}

.rail a .hint {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--ink-faint);
  opacity: 0;
  transition: opacity 0.2s;
}

.rail a:hover,
.rail a[aria-current="page"] {
  background: var(--card);
  color: var(--ink);
  box-shadow: inset 0 0 0 1px var(--rule);
}

.rail a:hover .hint,
.rail a[aria-current="page"] .hint { opacity: 1; }

.rail a[aria-current="page"] {
  box-shadow: inset 3px 0 0 var(--copper);
}

.stage {
  grid-area: stage;
  min-width: 0;
  padding: 36px 40px 80px;
}

.wrap {
  width: min(1120px, 100%);
  margin: 0 auto;
}

.nav-toggle { display: none; }

.rail-status {
  margin: 8px 10px 0;
  padding: 12px;
  border: 1px dashed var(--rule-strong);
  border-radius: 12px;
  font-size: 0.82rem;
  color: var(--ink-soft);
}

.rail-status strong {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--live);
  margin-bottom: 4px;
}

.footer-note {
  margin-top: 72px;
  padding-top: 22px;
  border-top: 1px solid var(--rule);
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--ink-faint);
}

.footer-note a { text-decoration: none; }
.footer-note a:hover { color: var(--forest); }

.back-to-top {
  position: fixed;
  right: 20px;
  bottom: 20px;
  z-index: 30;
}

@media (min-width: 900px) {
  .pathbar { display: block; }
  .search-chip { display: inline-flex; }
}

@media (max-width: 899px) {
  .shell {
    grid-template-columns: minmax(0, 1fr);
    grid-template-areas:
      "mast"
      "stage";
  }

  .nav-toggle { display: grid; }

  .rail {
    position: fixed;
    top: var(--mast-height);
    left: 0;
    width: min(86vw, 320px);
    height: calc(100vh - var(--mast-height));
    z-index: 35;
    background: var(--paper);
    transform: translateX(-105%);
    transition: transform 0.28s var(--ease);
    box-shadow: var(--shadow);
  }

  .rail.open { transform: translateX(0); }

  .stage { padding: 28px 18px 72px; }

  body.rail-open::after {
    content: "";
    position: fixed;
    inset: var(--mast-height) 0 0 0;
    background: rgba(28, 27, 22, 0.28);
    z-index: 34;
  }
}