/* Cairn 4.0 — shared slim operating shell.
   All color values come from the canonical gentoo-tokens.css contract. */

* { box-sizing: border-box; }
html, body { min-height: 100%; }
body {
  margin: 0;
  background: var(--gl-bg);
  color: var(--gl-text);
  font-family: var(--gl-font);
}
button, input, select, textarea { font: inherit; }
button { cursor: pointer; }
a { color: var(--gl-brand-strong); }

.c35-shell { min-height: 100vh; }
.c35-topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: grid;
  grid-template-columns: minmax(220px, 1fr) auto auto;
  align-items: center;
  gap: 18px;
  min-height: 68px;
  padding: 10px clamp(16px, 3vw, 40px);
  background: color-mix(in srgb, var(--gl-surface) 94%, transparent);
  border-bottom: 1px solid var(--gl-border);
  backdrop-filter: blur(14px);
}
.c35-brand { display: flex; align-items: center; gap: 12px; min-width: 0; }
.c35-mark {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--gl-brand-strong);
  color: var(--gl-surface);
  font-weight: 800;
}
.c35-brand-copy { min-width: 0; }
.c35-brand-copy strong { display: block; font-size: 15px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.c35-brand-copy small { color: var(--gl-text-3); }
.c35-nav { display: flex; gap: 6px; }
.c35-nav button,
.c35-quiet,
.c35-icon-button {
  border: 1px solid var(--gl-border);
  border-radius: 999px;
  background: var(--gl-surface);
  color: var(--gl-text-2);
  padding: 8px 12px;
}
.c35-nav button:hover,
.c35-quiet:hover,
.c35-icon-button:hover { border-color: var(--gl-brand); color: var(--gl-brand-strong); }
.c35-account { display: flex; align-items: center; gap: 8px; }
.c35-account a { font-size: 12px; text-decoration: none; }
.c35-account a.c35-signin-action {
  display: inline-flex;
  align-items: center;
  border-radius: var(--gl-radius);
  padding: 7px 11px;
  background: var(--gl-brand-strong);
  color: var(--gl-surface);
  font-weight: 750;
}
.c35-account a.c35-signin-action:hover { background: var(--gl-brand); }

.c35-health {
  display: flex;
  align-items: center;
  gap: 18px;
  min-height: 38px;
  padding: 7px clamp(16px, 3vw, 40px);
  border-bottom: 1px solid var(--gl-border);
  background: var(--gl-surface-2);
  color: var(--gl-text-2);
  font-size: 12px;
}
.c35-health-item { display: inline-flex; align-items: center; gap: 6px; }
.c35-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--gl-text-4); }
.c35-dot.good { background: var(--gl-done); }
.c35-dot.warn { background: var(--gl-gated); }
.c35-dot.bad { background: var(--gl-stuck); }
.c35-health-spacer { flex: 1; }
.c35-health button { padding: 3px 9px; font-size: 11px; }

.c35-main { padding: clamp(18px, 3vw, 40px); }
.c35-board-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 18px;
}
.c35-eyebrow { color: var(--gl-brand-grey); font-size: 11px; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
.c35-board-head h1 { margin: 4px 0; font-size: clamp(24px, 4vw, 36px); letter-spacing: -.04em; }
.c35-board-head p { margin: 0; color: var(--gl-text-3); font-size: 13px; }
.c35-board-actions { display: flex; gap: 8px; }
.c35-primary {
  border: 0;
  border-radius: var(--gl-radius);
  padding: 9px 14px;
  background: var(--gl-brand-strong);
  color: var(--gl-surface);
  font-weight: 750;
}
.c35-primary:hover { background: var(--gl-brand); }

.c35-lane-filter {
  display: flex;
  gap: 7px;
  overflow-x: auto;
  padding-bottom: 12px;
}
.c35-lane-filter button {
  flex: 0 0 auto;
  border: 1px solid var(--gl-border);
  border-radius: 999px;
  padding: 6px 11px;
  background: var(--gl-surface);
  color: var(--gl-text-2);
  font-size: 12px;
}
.c35-lane-filter button[aria-pressed="true"] {
  border-color: var(--gl-brand);
  background: var(--gl-brand-soft);
  color: var(--gl-brand-strong);
  font-weight: 750;
}

.c35-kanban {
  display: grid;
  grid-template-columns: repeat(4, minmax(240px, 1fr));
  gap: 12px;
  align-items: start;
  overflow-x: auto;
  padding-bottom: 20px;
}
.c35-column {
  min-height: 360px;
  padding: 12px;
  border: 1px solid var(--gl-border);
  border-radius: var(--gl-radius);
  background: var(--gl-surface-2);
}
.c35-column-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
  color: var(--gl-text-2);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .06em;
  text-transform: uppercase;
}
.c35-count {
  min-width: 24px;
  padding: 2px 7px;
  border-radius: 999px;
  background: var(--gl-surface-3);
  text-align: center;
}
.c35-stack { display: grid; gap: 9px; }
.c35-card {
  padding: 13px;
  border: 1px solid var(--gl-border);
  border-radius: var(--gl-radius);
  background: var(--gl-surface);
  box-shadow: var(--gl-shadow-sm);
}
.c35-card[data-priority="p0"] { border-left: 3px solid var(--gl-p0); }
.c35-card[data-priority="p1"] { border-left: 3px solid var(--gl-p1); }
.c35-card[data-active="true"] { border-color: var(--gl-inflight); }
.c35-card-top { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.c35-badge {
  display: inline-flex;
  max-width: 100%;
  padding: 3px 7px;
  border-radius: 999px;
  background: var(--gl-surface-3);
  color: var(--gl-text-3);
  font-size: 10px;
  font-weight: 750;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.c35-badge.attention { background: var(--gl-gated-bg); color: var(--gl-gated); }
.c35-badge.active { background: var(--gl-inflight-bg); color: var(--gl-inflight); }
.c35-card h3 { margin: 9px 0 5px; font-size: 14px; line-height: 1.3; }
.c35-card p { margin: 0; color: var(--gl-text-3); font-size: 12px; line-height: 1.45; }
.c35-receipt {
  margin-top: 10px;
  padding-top: 9px;
  border-top: 1px solid var(--gl-border);
  color: var(--gl-text-2);
  font-size: 11px;
  line-height: 1.45;
}
.c35-receipt::before { content: "Cairn AI · "; color: var(--gl-brand-grey); font-weight: 800; }
.c35-derived { margin-top: 8px; color: var(--gl-text-4); font-size: 10px; }
.c35-timing {
  margin-top: 8px;
  color: var(--gl-text-4);
  font-size: 10px;
  font-weight: 700;
}
.c35-timing[data-overdue="true"] {
  border-left: 2px solid var(--gl-gated);
  padding-left: 7px;
  color: var(--gl-gated);
}
.c35-card-actions { display: flex; gap: 7px; margin-top: 11px; }
.c35-card-actions button {
  flex: 1;
  border: 1px solid var(--gl-border);
  border-radius: var(--gl-radius-sm);
  padding: 7px 9px;
  background: var(--gl-surface);
  color: var(--gl-text-2);
  font-size: 11px;
  font-weight: 700;
}
.c35-card-actions button[data-action="start"] {
  border-color: var(--gl-brand);
  color: var(--gl-brand-strong);
}
.c35-empty { padding: 22px 10px; color: var(--gl-text-4); font-size: 12px; text-align: center; }

.c35-drawer-backdrop {
  position: fixed;
  inset: 0;
  z-index: 40;
  visibility: hidden;
  background: color-mix(in srgb, var(--gl-brand-strong) 22%, transparent);
  opacity: 0;
  transition: opacity .2s ease, visibility .2s ease;
}
.c35-drawer-backdrop.open { visibility: visible; opacity: 1; }
.c35-drawer {
  position: fixed;
  inset: 0 0 0 auto;
  z-index: 50;
  width: min(720px, 96vw);
  padding: 0;
  border: 0;
  border-left: 1px solid var(--gl-border);
  background: var(--gl-bg);
  box-shadow: var(--gl-shadow);
  transform: translateX(102%);
  transition: transform .24s cubic-bezier(.16, 1, .3, 1);
}
.c35-drawer.open { transform: translateX(0); }
.c35-drawer-head {
  position: sticky;
  top: 0;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  min-height: 68px;
  padding: 14px 18px;
  border-bottom: 1px solid var(--gl-border);
  background: var(--gl-surface);
}
.c35-drawer-head h2 { margin: 0; font-size: 19px; }
.c35-drawer-head p { margin: 3px 0 0; color: var(--gl-text-3); font-size: 12px; }
.c35-drawer-body { padding: 18px; overflow-y: auto; height: calc(100vh - 68px); }
.c35-section { margin-bottom: 24px; }
.c35-section-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 10px; }
.c35-section h3 { margin: 0; font-size: 14px; }
.c35-list { display: grid; gap: 9px; }
.c35-row {
  padding: 12px;
  border: 1px solid var(--gl-border);
  border-radius: var(--gl-radius);
  background: var(--gl-surface);
}
.c35-row-head { display: flex; justify-content: space-between; gap: 12px; }
.c35-row strong { font-size: 13px; }
.c35-row p { margin: 5px 0 0; color: var(--gl-text-3); font-size: 12px; line-height: 1.45; }
.c35-meta { display: flex; flex-wrap: wrap; gap: 5px; margin-top: 8px; }
.c35-row-actions { display: flex; gap: 7px; margin-top: 10px; }
.c35-row-actions button { border: 1px solid var(--gl-border); border-radius: var(--gl-radius-sm); background: var(--gl-surface); padding: 6px 9px; font-size: 11px; }

.c35-cairn-directory { display: grid; gap: 9px; }
.c35-cairn-group {
  border: 1px solid var(--gl-border);
  border-radius: var(--gl-radius);
  background: var(--gl-surface);
}
.c35-cairn-group > summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 13px;
  cursor: pointer;
  list-style: none;
}
.c35-cairn-group > summary::-webkit-details-marker { display: none; }
.c35-cairn-group > summary::after { content: '+'; color: var(--gl-text-3); font-size: 17px; }
.c35-cairn-group[open] > summary::after { content: '−'; }
.c35-cairn-group > summary strong { font-size: 13px; }
.c35-cairn-group > summary span { color: var(--gl-text-4); font-size: 10px; }
.c35-cairn-lanes {
  display: grid;
  gap: 1px;
  padding: 0 8px 8px;
  border-top: 1px solid var(--gl-border);
}
.c35-cairn-lanes a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 9px 6px;
  border-bottom: 1px solid var(--gl-border);
  color: var(--gl-text-2);
  font-size: 12px;
  text-decoration: none;
}
.c35-cairn-lanes a:last-child { border-bottom: 0; }
.c35-cairn-lanes a:hover { color: var(--gl-brand-strong); }
.c35-cairn-lanes a::after { content: '↗'; color: var(--gl-text-4); }

.c35-form { display: grid; gap: 10px; padding: 14px; border: 1px solid var(--gl-border); border-radius: var(--gl-radius); background: var(--gl-surface); }
.c35-form-row { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
.c35-form label { display: grid; gap: 4px; color: var(--gl-text-2); font-size: 11px; font-weight: 700; }
.c35-form input, .c35-form select, .c35-form textarea {
  width: 100%;
  border: 1px solid var(--gl-border-strong);
  border-radius: var(--gl-radius-sm);
  background: var(--gl-surface);
  color: var(--gl-text);
  padding: 9px 10px;
}
.c35-form textarea { min-height: 82px; resize: vertical; }

.c35-timeline { position: relative; display: grid; gap: 10px; }
.c35-event { padding: 11px 12px 11px 16px; border-left: 2px solid var(--gl-border-strong); background: var(--gl-surface); }
.c35-event time { color: var(--gl-text-4); font-size: 10px; }
.c35-event strong { display: block; margin: 3px 0; font-size: 12px; }
.c35-event p { margin: 0; color: var(--gl-text-3); font-size: 11px; }

.c35-ai-brief {
  margin: 0 0 16px;
  padding: 14px;
  border: 1px solid var(--gl-border-strong);
  border-radius: var(--gl-radius);
  background: var(--gl-brand-soft);
}
.c35-ai-brief span {
  display: block;
  margin-bottom: 7px;
  color: var(--gl-text-3);
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .05em;
}
.c35-ai-brief p { margin: 0; color: var(--gl-text); font-size: 12px; line-height: 1.5; }

.c35-modal {
  position: fixed;
  inset: 0;
  z-index: 70;
  display: none;
  place-items: center;
  padding: 20px;
  background: color-mix(in srgb, var(--gl-brand-strong) 30%, transparent);
}
.c35-modal.open { display: grid; }
.c35-modal-card {
  width: min(780px, 96vw);
  max-height: 88vh;
  overflow: auto;
  padding: 18px;
  border: 1px solid var(--gl-border);
  border-radius: var(--gl-radius);
  background: var(--gl-surface);
  box-shadow: var(--gl-shadow);
}
.c35-modal-card h2 { margin: 0 0 5px; }
.c35-modal-card textarea { width: 100%; min-height: 48vh; margin-top: 12px; padding: 12px; border: 1px solid var(--gl-border); border-radius: var(--gl-radius-sm); font-family: var(--gl-font-mono); font-size: 11px; line-height: 1.5; }
.c35-tool-why {
  margin: 12px 0;
  padding: 10px 12px;
  border-left: 3px solid var(--gl-brand);
  border-radius: var(--gl-radius-sm);
  background: var(--gl-surface-2);
  color: var(--gl-text-2);
  font-size: 12px;
  line-height: 1.45;
}
.c35-tool-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
  margin: 12px 0;
}
.c35-tool-option {
  display: flex;
  align-items: flex-start;
  gap: 9px;
  padding: 11px;
  border: 1px solid var(--gl-border);
  border-radius: var(--gl-radius-sm);
  background: var(--gl-surface);
  cursor: pointer;
}
.c35-tool-option:has(input:checked) {
  border-color: var(--gl-brand);
  background: var(--gl-brand-soft);
}
.c35-tool-option input { margin-top: 3px; accent-color: var(--gl-brand); }
.c35-tool-option span, .c35-tool-option small { display: block; }
.c35-tool-option strong { font-size: 13px; }
.c35-tool-option strong em {
  margin-left: 7px;
  color: var(--gl-brand-strong);
  font-size: 9px;
  font-style: normal;
  letter-spacing: .04em;
  text-transform: uppercase;
}
.c35-tool-option small { margin-top: 4px; color: var(--gl-text-3); font-size: 11px; line-height: 1.35; }
.c35-tool-note { color: var(--gl-text-3); font-size: 11px; line-height: 1.45; }
.c35-modal-actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 10px; }
.c35-toast {
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 90;
  max-width: 360px;
  padding: 10px 13px;
  border-radius: var(--gl-radius);
  background: var(--gl-brand-strong);
  color: var(--gl-surface);
  box-shadow: var(--gl-shadow);
  font-size: 12px;
  opacity: 0;
  transform: translateY(10px);
  pointer-events: none;
  transition: .2s ease;
}
.c35-toast.show { opacity: 1; transform: translateY(0); }

@media (max-width: 980px) {
  .c35-topbar { grid-template-columns: 1fr auto; }
  .c35-nav { order: 3; grid-column: 1 / -1; overflow-x: auto; }
  .c35-kanban { grid-template-columns: repeat(4, minmax(260px, 78vw)); }
}
@media (max-width: 620px) {
  .c35-topbar, .c35-main { padding-left: 13px; padding-right: 13px; }
  .c35-health { gap: 10px; overflow-x: auto; padding-left: 13px; padding-right: 13px; }
  .c35-board-head { align-items: flex-start; flex-direction: column; }
  .c35-form-row { grid-template-columns: 1fr; }
  .c35-tool-grid { grid-template-columns: 1fr; }
}
@media (prefers-reduced-motion: reduce) {
  .c35-drawer, .c35-drawer-backdrop, .c35-toast { transition: none; }
}