:root {
  --kb-ui: 'Hanken Grotesk', system-ui, -apple-system, sans-serif;
  --kb-mono: 'Spline Sans Mono', ui-monospace, monospace;
  --kb-bg: #f7f8fa;
  --kb-surface: #ffffff;
  --kb-col-bg: #f4f5f7;
  --kb-border: #e9ebef;
  --kb-border-strong: #e3e6ea;
  --kb-text: #1e2430;
  --kb-text-soft: #5b6675;
  --kb-text-mute: #8a93a0;
  --kb-text-faint: #aab2bd;
  --kb-input-bg: #ffffff;
  --kb-input-hover: #f6f7f9;
  --kb-menu-bg: #ffffff;
  --kb-menu-hover: #f3f5f9;
  --kb-menu-on: #eef2ff;
  --kb-menu-on-hover: #e3e9ff;
  --kb-divider: #e2e6ec;
  --kb-dist-track: #e9ebef;
  --kb-scroll-thumb: #cdd2da;
  --kb-stack-bg: #eef0f3;
  --kb-stack-bg-hover: #ffffff;
  --kb-stack-flag-bg: #eff5ff;
  --kb-stack-flag-border: #93b4f3;
  --kb-stack-flag-ring: rgba(37, 99, 235, .14);
  --kb-brand-name: #141a24;
  --kb-card-shadow: 0 1px 2px rgba(16, 24, 40, .06);
  --kb-card-shadow-hover: 0 6px 18px rgba(16, 24, 40, .10);
}

[data-theme="dark"] {
  --kb-bg: #0f141c;
  --kb-surface: #161c26;
  --kb-col-bg: #131820;
  --kb-border: #232b38;
  --kb-border-strong: #2c3543;
  --kb-text: #e8ecf2;
  --kb-text-soft: #b4bccb;
  --kb-text-mute: #7e8898;
  --kb-text-faint: #5d6677;
  --kb-input-bg: #1c2330;
  --kb-input-hover: #232b39;
  --kb-menu-bg: #1c2330;
  --kb-menu-hover: #232b39;
  --kb-menu-on: #29324a;
  --kb-menu-on-hover: #313b56;
  --kb-divider: #2c3543;
  --kb-dist-track: #2a3240;
  --kb-scroll-thumb: #353e4d;
  --kb-stack-bg: #1f2733;
  --kb-stack-bg-hover: #29323f;
  --kb-stack-flag-bg: #1d2a44;
  --kb-stack-flag-border: #3b5aa3;
  --kb-stack-flag-ring: rgba(96, 142, 240, .18);
  --kb-brand-name: #f4f6fa;
  --kb-card-shadow: 0 1px 2px rgba(0, 0, 0, .45);
  --kb-card-shadow-hover: 0 6px 18px rgba(0, 0, 0, .55);
}

html, body { background: var(--kb-bg); font-family: var(--kb-ui); color: var(--kb-text); margin: 0; padding: 0; }
* { box-sizing: border-box; }

.kb-shell { height: 100vh; display: flex; flex-direction: column; background: var(--kb-bg); overflow: hidden; }

/* ---------- header ---------- */
.kb-header {
  flex: 0 0 auto;
  display: flex; align-items: center; gap: 18px;
  padding: 12px 20px;
  background: var(--kb-surface);
  border-bottom: 1px solid var(--kb-border);
  flex-wrap: wrap;
}
.kb-brand { display: flex; align-items: center; gap: 9px; }
.kb-brand-logo { width: 24px; height: 24px; display: block; }
.kb-brand-name { font-size: 18px; font-weight: 800; color: var(--kb-brand-name); letter-spacing: -.4px; }

.kb-status-pills { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; }
.kb-pill {
  display: inline-flex; align-items: center; gap: 5px;
  font-size: 11px; font-weight: 600; cursor: pointer;
  padding: 4px 9px; border-radius: 20px;
  border: 1px solid var(--kb-border-strong);
  background: var(--kb-input-bg); color: var(--kb-text-soft);
  font-family: var(--kb-ui);
  transition: all .12s;
}
.kb-pill:hover { background: var(--kb-input-hover); }
.kb-pill .kb-pill-dot { width: 8px; height: 8px; border-radius: 3px; display: inline-block; }
.kb-pill[data-on="1"] { color: #fff; }
.kb-pill[data-muted="1"] { color: var(--kb-text-faint); opacity: .7; }
.kb-pill-clear {
  border: none; background: transparent; cursor: pointer;
  color: #94a3b8; font: 600 11px/1 var(--kb-ui);
  padding: 4px;
}

.kb-activity-pills {
  display: inline-flex; align-items: center;
  background: var(--kb-input-bg); border: 1px solid var(--kb-border-strong);
  border-radius: 9px; padding: 2px; gap: 1px;
}
.kb-act-pill {
  border: none; cursor: pointer; background: transparent;
  font: 600 11.5px/1 var(--kb-ui); color: var(--kb-text-soft);
  padding: 5px 10px; border-radius: 7px;
  transition: background .12s, color .12s;
}
.kb-act-pill:hover { background: var(--kb-input-hover); }
.kb-act-pill[data-on="1"] { background: #1e293b; color: #fff; }
[data-theme="dark"] .kb-act-pill[data-on="1"] { background: #e2e8f0; color: #0f172a; }
.kb-group-mode { display: flex; gap: 4px; align-items: center; }
.kb-activity-sep {
  width: 1px; align-self: stretch;
  background: var(--kb-border-strong);
  margin: 3px 4px;
}

.kb-header-right { margin-left: auto; display: flex; align-items: center; gap: 11px; flex-wrap: wrap; }
.kb-counts { font-size: 11.5px; color: var(--kb-text-mute); font-weight: 600; }
.kb-counts .stale { color: #c2410c; }
.kb-search-wrap { position: relative; }
.kb-search-wrap svg { position: absolute; left: 10px; top: 9px; }
.kb-search {
  width: 200px; padding: 8px 10px 8px 30px;
  border-radius: 9px; border: 1px solid var(--kb-border-strong);
  font: 12.5px var(--kb-ui); color: var(--kb-text);
  outline: none; background: var(--kb-input-bg);
}
.kb-search:focus { border-color: var(--kb-text-mute); }

/* people filter */
.kb-people { position: relative; }
.kb-people-btn {
  display: inline-flex; align-items: center; gap: 7px;
  padding: 7px 11px; border-radius: 9px;
  border: 1px solid var(--kb-border-strong); background: var(--kb-input-bg);
  cursor: pointer; font: 600 12.5px var(--kb-ui); color: var(--kb-text);
}
.kb-people-btn[data-on="1"] { background: var(--kb-menu-on); }
.kb-people-menu {
  position: absolute; top: 100%; right: 0; margin-top: 6px;
  background: var(--kb-menu-bg); border-radius: 11px;
  box-shadow: 0 12px 40px rgba(0,0,0,.28), 0 0 0 1px var(--kb-border-strong);
  padding: 6px; width: 230px; z-index: 60;
  max-height: 380px; overflow-y: auto;
}
.kb-people-row {
  display: flex; align-items: center; gap: 9px; width: 100%;
  padding: 7px 8px; border: none; border-radius: 8px; cursor: pointer;
  background: transparent; font-family: var(--kb-ui); text-align: left;
}
.kb-people-row[data-on="1"] { background: var(--kb-menu-on); }
.kb-people-row:hover { background: var(--kb-menu-hover); }
.kb-people-row[data-on="1"]:hover { background: var(--kb-menu-on-hover); }
.kb-people-row span.name { font-size: 12.5px; font-weight: 500; color: var(--kb-text); }
.kb-people-row .check { margin-left: auto; }
.kb-people-clear {
  width: 100%; margin-top: 4px; padding: 7px;
  border: none; border-top: 1px solid var(--kb-border);
  background: transparent; cursor: pointer;
  font: 600 11.5px var(--kb-ui); color: var(--kb-text-soft);
}

.kb-sync { display: inline-flex; align-items: center; gap: 6px; font: 600 11.5px var(--kb-ui); color: var(--kb-text-mute); text-decoration: none; background: none; border: none; padding: 0; cursor: pointer; }
.kb-sync:hover { opacity: 0.7; }
.kb-sync .dot { width: 7px; height: 7px; border-radius: 50%; }
.kb-sync .dot-green { background: #22c55e; }
.kb-sync .dot-amber { background: #eab308; }
.kb-sync .dot-red   { background: #ef4444; }
@keyframes kb-spin { to { transform: rotate(360deg); } }
.kb-sync[data-syncing="1"] { pointer-events: none; opacity: 0.6; }
.kb-sync[data-syncing="1"] .dot { background: none; border: 1.5px solid transparent; border-top-color: #22c55e; animation: kb-spin 0.7s linear infinite; }
.kb-sync[data-syncing="1"] .dot-amber { border-top-color: #eab308; }
.kb-sync[data-syncing="1"] .dot-red   { border-top-color: #ef4444; }
.kb-user { font-size: 12px; color: var(--kb-text-soft); }
.kb-logout-btn {
  border: 1px solid var(--kb-border-strong); background: var(--kb-input-bg);
  border-radius: 8px; padding: 6px 11px;
  font: 600 12px var(--kb-ui); color: var(--kb-text-soft); cursor: pointer;
}
.kb-logout-btn:hover { background: var(--kb-input-hover); }

.kb-theme-btn {
  display: inline-flex; align-items: center; justify-content: center;
  width: 30px; height: 30px;
  border: 1px solid var(--kb-border-strong);
  background: var(--kb-input-bg);
  border-radius: 8px; padding: 0;
  color: var(--kb-text-soft); cursor: pointer;
}
.kb-theme-btn:hover { background: var(--kb-input-hover); }
.kb-theme-btn .kb-theme-moon { display: none; }
[data-theme="dark"] .kb-theme-btn .kb-theme-sun { display: none; }
[data-theme="dark"] .kb-theme-btn .kb-theme-moon { display: inline; }
.kb-warn {
  font-size: 11px; font-weight: 700; color: #c2410c;
  background: #fef0e7; border-radius: 6px; padding: 3px 8px;
}

/* ---------- board scroll area ---------- */
.kb-board {
  flex: 1; min-height: 0;
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(220px, 360px);
  align-items: stretch;
  gap: 10px;
  padding: 14px;
  overflow: auto;
  scrollbar-width: thin; scrollbar-color: #cdd2da transparent;
}
.kb-board::-webkit-scrollbar { width: 10px; height: 10px; }
.kb-board::-webkit-scrollbar-thumb { background: var(--kb-scroll-thumb); border-radius: 5px; border: 2px solid var(--kb-bg); }
.kb-board::-webkit-scrollbar-track { background: transparent; }

/* ---------- column ---------- */
.kb-col {
  flex: 1 1 0; min-width: 220px; max-width: 360px;
  display: flex; flex-direction: column;
  background: var(--kb-col-bg);
  border-radius: 12px; border: 1px solid var(--kb-border);
  overflow: visible;
}
.kb-col-head {
  padding: 9px 10px;
  flex: 0 0 auto;
  background: var(--kb-surface);
  border-bottom: 1px solid var(--kb-border);
  position: sticky; top: 0; z-index: 4;
  border-top-left-radius: 12px; border-top-right-radius: 12px;
}
.kb-col-accent { height: 3px; border-radius: 3px; margin-bottom: 8px; }
.kb-col-title-row { display: flex; align-items: flex-start; gap: 5px; }
.kb-col-name {
  font-size: 12px; font-weight: 700; color: var(--kb-text); line-height: 1.2;
  flex: 1; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.kb-col-count { font-size: 11px; font-weight: 700; color: var(--kb-text-mute); flex: 0 0 auto; }
a.kb-col-name { text-decoration: none; color: inherit; }
a.kb-col-name:hover { text-decoration: underline; }
.kb-col-meta { display: flex; align-items: center; gap: 6px; margin: 6px 0 7px; }
.kb-col-key { font-family: var(--kb-mono); font-size: 9px; color: var(--kb-text-faint); font-weight: 600; }
.kb-col-stale {
  margin-left: auto;
  font-size: 9.5px; font-weight: 700; color: #c2410c;
  background: #fef0e7; border-radius: 4px; padding: 0 5px;
}
.kb-dist {
  display: flex; height: 4px; border-radius: 4px; overflow: hidden; background: var(--kb-dist-track);
}
.kb-dist span { height: 100%; }

.kb-col-body {
  flex: 1; display: flex; flex-direction: column; gap: 6px; padding: 8px;
  overflow: visible;
}

/* ---------- stack button (To Do / Done) ---------- */
.kb-stack-wrap { position: relative; }
.kb-stack-shadow {
  position: absolute; inset: 4px 4px -4px 4px;
  background: var(--kb-stack-bg-hover); border: 1px solid var(--kb-border-strong); border-radius: 7px; opacity: .5;
}
.kb-stack-btn {
  position: relative; width: 100%;
  display: flex; align-items: center; gap: 7px;
  padding: 7px 9px; border-radius: 7px;
  background: var(--kb-stack-bg); border: 1px solid var(--kb-border-strong); border-left: 4px solid var(--kb-stack-color, #94a3b8);
  font-family: var(--kb-ui); text-align: left; cursor: pointer;
  transition: background .12s, border-color .12s;
}
.kb-stack-btn:hover { background: var(--kb-stack-bg-hover); border-color: var(--kb-text-faint); }
.kb-stack-btn[data-flag="1"] { background: var(--kb-stack-flag-bg); border-color: var(--kb-stack-flag-border); box-shadow: 0 0 0 2px var(--kb-stack-flag-ring); }
.kb-stack-chev { transition: transform .15s; flex: 0 0 auto; }
.kb-stack-btn[data-open="1"] .kb-stack-chev { transform: rotate(90deg); }
.kb-stack-count { font-size: 11.5px; font-weight: 700; color: var(--kb-text); }
.kb-stack-label { font-size: 11.5px; font-weight: 600; color: var(--kb-text-mute); }
.kb-stack-trail { margin-left: auto; font-size: 10px; font-weight: 600; color: var(--kb-text-faint); }
.kb-stack-hits {
  margin-left: auto; display: inline-flex; align-items: center; gap: 4px;
  font: 800 10px var(--kb-ui); color: #fff; background: #2563eb;
  border-radius: 10px; padding: 2px 7px;
}

.kb-divider {
  display: flex; align-items: center; gap: 6px; margin: 2px 0 0;
}
.kb-divider-text { font-size: 9px; font-weight: 800; letter-spacing: .4px; }
.kb-divider-line { flex: 1; height: 1px; background: var(--kb-divider); }

/* ---------- card ---------- */
.kb-card {
  position: relative; border-radius: 8px;
  background: var(--kb-paper, #fff);
  border: 1px solid var(--kb-card-border, #e7e9ee);
  border-left: 4px solid var(--kb-state-color, #94a3b8);
  padding: 8px 10px;
  box-shadow: var(--kb-card-shadow);
  cursor: pointer;
  transition: transform .14s cubic-bezier(.2,.7,.3,1), box-shadow .14s, opacity .2s;
  display: block;
  text-decoration: none;
  color: #1e2430;
}
.kb-card:hover { transform: translateY(-3px); box-shadow: var(--kb-card-shadow-hover); }
.kb-card[data-dim="1"] { opacity: .28; }
.kb-stack-wrap[data-dim="1"] { opacity: .28; transition: opacity .2s; }
.kb-col[data-dim="1"] { opacity: .35; transition: opacity .2s; }
.kb-card[data-spotlight="1"] { box-shadow: 0 0 0 2px #1e293b, 0 8px 20px rgba(0,0,0,.18); }
.kb-card[data-critical="1"] { box-shadow: 0 0 0 3px rgba(239,68,68,.12); }
.kb-card[data-hidden="1"] { display: none; }
.kb-card-subtask {
  margin-left: 20px;
  padding-top: 7px;
  padding-bottom: 7px;
  border-left-width: 3px;
}
.kb-card-subtask::before {
  content: "";
  position: absolute;
  left: -15px;
  top: -7px;
  width: 11px;
  height: 21px;
  border-left: 2px solid var(--kb-border-strong);
  border-bottom: 2px solid var(--kb-border-strong);
  border-bottom-left-radius: 6px;
  pointer-events: none;
}
.kb-card-subtask .kb-card-title { font-size: 12px; }

.kb-card-row1 { display: flex; align-items: center; gap: 6px; margin-bottom: 5px; }
.kb-card-id {
  font-family: var(--kb-mono); font-size: 10.5px; font-weight: 600;
  color: #5b6675; letter-spacing: .2px;
  opacity: 1;
}
.kb-card-meta { margin-left: auto; display: flex; align-items: center; gap: 5px; }
.kb-step-chip {
  font: 800 9.5px var(--kb-ui);
  border-radius: 4px; padding: 1px 5px;
  font-variant-numeric: tabular-nums; line-height: 1.5;
}
.kb-step-chip span { opacity: .5; }
.kb-age {
  display: inline-flex; align-items: center; gap: 3px;
  padding: 1px 5px; border-radius: 4px;
  font: 700 10.5px var(--kb-ui); line-height: 1.4;
}
.kb-age .dot { width: 5px; height: 5px; border-radius: 50%; }
.kb-new-badge {
  font: 800 8.5px var(--kb-ui); letter-spacing: .5px;
  color: #fff; background: #2563eb;
  border-radius: 4px; padding: 1px 5px; line-height: 1.5;
}

.kb-card-title {
  font: 600 12.5px/1.32 var(--kb-ui); color: #1e2430;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical;
  overflow: hidden;
}

.kb-card-row2 { display: flex; align-items: center; gap: 4px; margin-top: 7px; }
.kb-card-avatar-wrap { margin-left: auto; }

.kb-avatar {
  border-radius: 50%; display: inline-flex; align-items: center; justify-content: center;
  color: #fff; font-family: var(--kb-ui); font-weight: 700; letter-spacing: .2px; flex: 0 0 auto;
  box-shadow: 0 0 0 1.5px var(--kb-avatar-ring, #fff);
}

/* progress strip (ladder) */
.kb-ladder {
  display: flex; align-items: center; gap: 2px; margin-top: 8px;
}
.kb-ladder span { flex: 1; height: 5px; border-radius: 2px; background: #e7eaee; transition: background .2s; }

/* dark-mode postits: inline --kb-paper from helper beats CSS, so override
   the resolved properties directly here. Staleness keeps a tinted variant. */
[data-theme="dark"] .kb-card {
  background: #1c2430;
  border-color: #2d3645;
  color: #e8ecf2;
}
[data-theme="dark"] .kb-card[data-staleness="somewhat"] {
  background: #2a2317;
  border-color: #6b4a1b;
}
[data-theme="dark"] .kb-card[data-staleness="really"] {
  background: #2c1818;
  border-color: #6e2c2c;
}
[data-theme="dark"] .kb-card-title { color: #e8ecf2; }
[data-theme="dark"] .kb-card-id { color: #9aa3b3; }
[data-theme="dark"] .kb-ladder span { background: #2d3645; }
[data-theme="dark"] .kb-card .kb-avatar { box-shadow: 0 0 0 1.5px #1c2430; }
[data-theme="dark"] .kb-card[data-staleness="somewhat"] .kb-avatar { box-shadow: 0 0 0 1.5px #2a2317; }
[data-theme="dark"] .kb-card[data-staleness="really"] .kb-avatar { box-shadow: 0 0 0 1.5px #2c1818; }
[data-theme="dark"] .kb-card[data-provisional="1"] {
  background: #172033;
  border-color: #2b3a5e;
}
[data-theme="dark"] .kb-card[data-provisional="1"] .kb-avatar { box-shadow: 0 0 0 1.5px #172033; }

/* ---------- column drag-and-drop ---------- */
.kb-col-head { cursor: grab; user-select: none; }
.kb-col-head:active { cursor: grabbing; }
.kb-col[data-dragging="1"] { opacity: 0.4; }
.kb-col[data-drop-side="left"]  { box-shadow: -3px 0 0 0 #3b82f6; }
.kb-col[data-drop-side="right"] { box-shadow:  3px 0 0 0 #3b82f6; }

/* animations */
.kb-fade-in { animation: pgfade .16s ease-out; }
@keyframes pgfade { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: none; } }

/* ---------- hover tooltip ---------- */
.kb-tt {
  position: fixed; z-index: 80; pointer-events: auto;
  background: #1c2330; color: #e8ecf2; border-radius: 10px;
  padding: 13px 15px; box-shadow: 0 12px 40px rgba(0,0,0,.35);
  font-family: var(--kb-ui); width: 270px;
  max-height: 80vh; overflow-y: auto;
  scrollbar-width: thin; scrollbar-color: rgba(255,255,255,.15) transparent;
  animation: pgfade .14s ease-out;
}
.kb-tt::-webkit-scrollbar { width: 4px; }
.kb-tt::-webkit-scrollbar-track { background: transparent; }
.kb-tt::-webkit-scrollbar-thumb { background: rgba(255,255,255,.15); border-radius: 2px; }
.kb-tt::-webkit-scrollbar-thumb:hover { background: rgba(255,255,255,.28); }
.kb-tt-row { display: flex; align-items: center; gap: 7px; margin-bottom: 7px; }
.kb-tt-id { font-family: var(--kb-mono); font-size: 11px; color: #94a3b8; font-weight: 600; }
.kb-tt-state-pill {
  margin-left: auto; display: inline-flex; align-items: center;
  font: 700 10.5px var(--kb-ui); color: #fff; border-radius: 5px; padding: 2px 7px;
}
.kb-tt-title { font-size: 13.5px; font-weight: 700; line-height: 1.3; margin-bottom: 6px; }
.kb-tt-desc {
  font-size: 11.5px; line-height: 1.5; color: #9aa3b0;
  margin-bottom: 8px; word-break: break-word;
}
.kb-tt-desc p { margin: 0 0 5px; }
.kb-tt-desc p:last-of-type { margin-bottom: 0; }
.kb-tt-desc ul, .kb-tt-desc ol { margin: 2px 0 5px; padding-left: 15px; }
.kb-tt-desc li { margin-bottom: 1px; }
.kb-tt-desc a { color: #60a5fa; text-decoration: none; }
.kb-tt-desc a:hover { text-decoration: underline; }
.kb-tt-desc code { background: rgba(255,255,255,.1); padding: 1px 4px; border-radius: 3px; font-family: var(--kb-mono); font-size: 10.5px; color: #e2e8f0; }
.kb-tt-desc strong { color: #e8ecf2; font-weight: 600; }
.kb-tt-desc em { font-style: italic; }
.kb-tt-desc-toggle {
  background: none; border: none; padding: 0; cursor: pointer;
  color: #60a5fa; font: 600 11px var(--kb-ui); white-space: nowrap;
}
.kb-tt-desc-toggle:hover { color: #93c5fd; }
.kb-tt-grid {
  display: grid; grid-template-columns: auto 1fr; row-gap: 6px; column-gap: 12px;
  border-top: 1px solid rgba(255,255,255,.08); padding-top: 10px; font-size: 11.5px;
}
.kb-tt-grid .lbl { color: #9aa3b0; font-weight: 500; }
.kb-tt-grid .val { color: #e8ecf2; font-weight: 500; }
.kb-tt-prs { border-top: 1px solid rgba(255,255,255,.08); margin-top: 9px; padding-top: 8px; display: flex; flex-direction: column; gap: 2px; }
.kb-tt-pr-link { display: flex; align-items: center; gap: 7px; padding: 4px 5px; border-radius: 5px; text-decoration: none; color: #e8ecf2; font-size: 11.5px; font-weight: 500; overflow: hidden; transition: background .1s; }
.kb-tt-pr-link:hover { background: rgba(255,255,255,.07); }
.kb-tt-pr-dot { width: 7px; height: 7px; border-radius: 50%; flex: 0 0 auto; }
.kb-tt-pr-title { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.kb-tt-hint { font-size: 10.5px; color: #6b7689; margin-top: 9px; }

/* diff banner placeholder area (future) */
.kb-banner {
  flex: 0 0 auto; display: flex; align-items: center; gap: 10px;
  padding: 8px 20px; background: #1e293b; color: #cbd5e1;
}

/* utility */
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }

@media (max-width: 800px) {
  .kb-board {
    grid-auto-flow: row;
    grid-auto-columns: auto;
    grid-auto-rows: auto;
  }
  .kb-col { max-width: none; width: 100%; }
}

/* ---------- collapsible middle groups ---------- */
.kb-divider-toggle {
  width: 100%;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 3px 2px;
  display: flex;
  align-items: center;
  gap: 6px;
  border-radius: 5px;
  font-family: var(--kb-ui);
  text-align: left;
  transition: background .12s;
}
.kb-divider-toggle:hover { background: var(--kb-input-hover); }
.kb-divider-toggle .kb-stack-chev { flex: 0 0 auto; }
.kb-divider-toggle[data-open="1"] .kb-stack-chev { transform: rotate(90deg); }

.kb-divider-count {
  font-size: 9px;
  font-weight: 700;
  color: var(--kb-text-mute);
  flex: 0 0 auto;
}

.kb-middle-body { display: flex; flex-direction: column; gap: 6px; }
.kb-middle-body[hidden] { display: none; }

/* ---------- per-column collapse-all button ---------- */
.kb-col-collapse-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  flex: 0 0 auto;
  border: 1px solid var(--kb-border-strong);
  background: var(--kb-input-bg);
  border-radius: 6px;
  padding: 0;
  color: var(--kb-text-mute);
  cursor: pointer;
  transition: background .12s, color .12s;
}
.kb-col-collapse-btn:hover { background: var(--kb-input-hover); color: var(--kb-text); }
.kb-col-collapse-btn[data-open="0"] .kb-col-compress { display: none; }
.kb-col-collapse-btn[data-open="1"] .kb-col-expand  { display: none; }

/* ---------- PR button on cards ---------- */
.kb-pr-btn {
  width: 18px; height: 18px;
  display: inline-flex; align-items: center; justify-content: center;
  border: 1px solid var(--kb-border-strong);
  background: transparent;
  border-radius: 4px;
  padding: 0;
  cursor: pointer;
  color: var(--kb-text-mute);
  flex: 0 0 auto;
  transition: background .12s, color .12s, border-color .12s;
}
.kb-pr-btn:hover { background: var(--kb-input-hover); color: var(--kb-text); border-color: var(--kb-text-faint); }

/* Floating PR multi-PR picker */
.kb-pr-popup {
  position: fixed;
  z-index: 200;
  background: var(--kb-menu-bg);
  border: 1px solid var(--kb-border-strong);
  border-radius: 8px;
  box-shadow: 0 8px 24px rgba(0,0,0,.15);
  padding: 4px;
  width: 260px;
  font-family: var(--kb-ui);
}
.kb-pr-row {
  display: flex; align-items: center; gap: 7px;
  padding: 6px 8px;
  border-radius: 5px;
  text-decoration: none;
  color: var(--kb-text);
  font-size: 11.5px;
  font-weight: 500;
  overflow: hidden;
  transition: background .1s;
}
.kb-pr-row:hover { background: var(--kb-menu-hover); }
.kb-pr-dot { width: 7px; height: 7px; border-radius: 50%; flex: 0 0 auto; }
.kb-pr-row-title { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* ---------- filter dropdown buttons ---------- */
.kb-filter-wrap { position: relative; }
.kb-filter-btn {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 11.5px; font-weight: 600; color: var(--kb-text-soft);
  padding: 5px 10px; border-radius: 7px;
  border: 1px solid var(--kb-border-strong); background: var(--kb-input-bg);
  cursor: pointer; font-family: var(--kb-ui);
  transition: background .12s, border-color .12s;
}
.kb-filter-btn:hover { background: var(--kb-input-hover); }
.kb-filter-btn[data-on="1"] { border-color: #3b82f6; color: var(--kb-text); }
.kb-filter-dots { display: flex; align-items: center; gap: 2px; }
.kb-filter-dot-preview { width: 7px; height: 7px; border-radius: 2px; display: inline-block; }
.kb-filter-badge {
  background: var(--kb-menu-on); color: #2563eb;
  border-radius: 5px; font-size: 9.5px; font-weight: 800; padding: 1px 6px;
}
[data-theme="dark"] .kb-filter-badge { color: #93c5fd; }

.kb-filter-menu {
  position: absolute; top: calc(100% + 6px); left: 0;
  background: var(--kb-menu-bg); border-radius: 11px;
  box-shadow: 0 12px 40px rgba(0,0,0,.28), 0 0 0 1px var(--kb-border-strong);
  padding: 6px; min-width: 200px; z-index: 60;
}
.kb-filter-row {
  display: flex; align-items: center; gap: 9px; width: 100%;
  padding: 7px 8px; border: none; border-radius: 8px; cursor: pointer;
  background: transparent; font-family: var(--kb-ui); text-align: left;
  transition: background .12s;
}
.kb-filter-row:hover { background: var(--kb-menu-hover); }
.kb-filter-row[data-on="1"] { background: var(--kb-menu-on); }
.kb-filter-row[data-on="1"]:hover { background: var(--kb-menu-on-hover); }
.kb-filter-row-dot { width: 10px; height: 10px; border-radius: 3px; flex: 0 0 auto; }
.kb-filter-row-label { font-size: 12.5px; font-weight: 500; color: var(--kb-text); flex: 1; }
.kb-filter-check { display: none; flex: 0 0 auto; }
.kb-filter-row[data-on="1"] .kb-filter-check { display: inline; }
.kb-filter-divider { height: 1px; background: var(--kb-border); margin: 4px 0; }
.kb-filter-clear {
  width: 100%; padding: 6px 9px; border: none; background: transparent;
  cursor: pointer; font: 600 11.5px var(--kb-ui); color: var(--kb-text-mute); text-align: left;
  border-radius: 7px; transition: background .12s;
}
.kb-filter-clear:hover { background: var(--kb-menu-hover); color: var(--kb-text); }
.kb-filter-section-label {
  font-size: 9.5px; font-weight: 800; letter-spacing: .6px; text-transform: uppercase;
  color: var(--kb-text-faint); padding: 6px 8px 2px; margin: 0;
}
.kb-filter-seg {
  display: flex; margin: 4px 6px 8px;
  background: var(--kb-input-bg); border: 1px solid var(--kb-border-strong);
  border-radius: 7px; padding: 2px; gap: 1px;
}
.kb-filter-seg-btn {
  flex: 1; font-size: 11px; font-weight: 600; color: var(--kb-text-mute);
  padding: 5px 8px; border-radius: 5px; border: none;
  background: transparent; text-align: center; cursor: pointer; font-family: var(--kb-ui);
  transition: background .12s, color .12s;
}
.kb-filter-seg-btn:hover { background: var(--kb-input-hover); }
.kb-filter-seg-btn[data-on="1"] { background: var(--kb-menu-on); color: var(--kb-text); }
.kb-filter-days { display: flex; flex-wrap: wrap; gap: 4px; padding: 0 6px 8px; }
.kb-filter-day-btn {
  font-size: 11.5px; font-weight: 600; color: var(--kb-text-mute);
  padding: 4px 10px; border-radius: 6px;
  border: 1px solid var(--kb-border-strong); background: var(--kb-input-bg);
  cursor: pointer; font-family: var(--kb-ui); transition: background .12s, border-color .12s, color .12s;
}
.kb-filter-day-btn:hover { background: var(--kb-input-hover); }
.kb-filter-day-btn[data-on="1"] { background: var(--kb-menu-on); border-color: #3b82f6; color: #2563eb; }
[data-theme="dark"] .kb-filter-day-btn[data-on="1"] { color: #93c5fd; }

/* ---------- ghost EPICs icon button ---------- */
.kb-ghost-btn {
  display: inline-flex; align-items: center; justify-content: center;
  width: 30px; height: 30px; border: 1px solid var(--kb-border-strong);
  background: var(--kb-input-bg); border-radius: 7px; font-size: 15px;
  cursor: pointer; transition: background .12s, border-color .12s;
}
.kb-ghost-btn:hover { background: var(--kb-input-hover); }
.kb-ghost-btn[data-on="1"] { background: var(--kb-menu-on); border-color: #3b82f6; }

/* ---------- density toggle button ---------- */
.kb-density-btn {
  display: inline-flex; align-items: center; justify-content: center;
  width: 30px; height: 30px;
  border: 1px solid var(--kb-border-strong);
  background: var(--kb-input-bg);
  border-radius: 8px; padding: 0;
  color: var(--kb-text-soft); cursor: pointer;
}
.kb-density-btn:hover { background: var(--kb-input-hover); }
.kb-density-btn .kb-density-expand { display: none; }
[data-density="compact"] .kb-density-btn .kb-density-compact { display: none; }
[data-density="compact"] .kb-density-btn .kb-density-expand { display: inline; }

/* ---------- compact density mode ---------- */
[data-density="compact"] .kb-board {
  grid-auto-columns: minmax(160px, 240px);
  gap: 6px;
  padding: 8px;
}
[data-density="compact"] .kb-col { min-width: 160px; max-width: 240px; }
[data-density="compact"] .kb-col-head { padding: 5px 8px; }
[data-density="compact"] .kb-col-accent { margin-bottom: 5px; }
[data-density="compact"] .kb-col-meta { margin: 3px 0 4px; }
[data-density="compact"] .kb-col-body { gap: 4px; padding: 5px; }
[data-density="compact"] .kb-card { padding: 4px 7px; }
[data-density="compact"] .kb-card-row1 { margin-bottom: 2px; }
[data-density="compact"] .kb-card-row2 { margin-top: 2px; }
[data-density="compact"] .kb-card-title { font-size: 11.5px; }
[data-density="compact"] .kb-ladder { display: none; }