:root { --cell: #f6f6f5; --cell-over: #f2eee7; --card: #fff; --card-line: #e9e9e7; --card-hover: #d9d9d6; --soft: #8a8c91;
  --accent: #c2622d; --accent-bg: #fbf1ea; --accent-line: #efcfb8; --warn: #a8620a; --warn-bg: #fbeedb; --warn-line: #ecc995; --badge: #fcefd9;
  --billing: #f08a24; --design: #9a6ae0; --api: #1e9fcf; --lifecycle: #a77a12;
  --emma: #9b4f2d; --emma-bg: #f6e2d6; --marcus: #3c6b4b; --marcus-bg: #dcefe1; --chloe: #5b4bb5; --chloe-bg: #e5e0fa; --daniel: #2c5f9e; --daniel-bg: #dae7f8;
  --lift: 0 22px 44px -18px #0000004a, 0 6px 14px -6px #0000001f;
  --ease: cubic-bezier(.22, 1, .36, 1); }
:root[data-theme="dark"] { --cell: #262826; --cell-over: #2f2b24; --card: #2e312e; --card-line: #3a3d3a; --card-hover: #4c504c; --soft: #8f948f;
  --accent: #f0a274; --accent-bg: #3a2a21; --accent-line: #6b4632; --warn: #f1b866; --warn-bg: #3b2f1c; --warn-line: #6e5528; --badge: #47371d;
  --emma: #f2b896; --emma-bg: #4a3326; --marcus: #9fd8b0; --marcus-bg: #27412f; --chloe: #c2b6ff; --chloe-bg: #352d5c; --daniel: #a3c6f5; --daniel-bg: #23395a;
  --lift: 0 22px 44px -16px #000000b0, 0 6px 14px -6px #00000080; }

/* The board needs more room than the 720px text column. */
main { width: min(1000px, calc(100% - 40px)); }
nav, .page-heading, .controls, .status, .hint, .demo-note, .tricks, main > footer { max-width: 720px; margin-inline: auto; }
nav { align-items: center; } nav > span { margin-left: auto; }
#language { border: 0; background: none; padding: 6px 8px; color: var(--muted); }
[hidden] { display: none !important; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }

.stage { margin: 34px 0 8px; font-size: 13px; line-height: 1.35; }
/* lab.css styles every button; these selectors win back the board's own look. */
.stage button, .stage button:hover, .stage button[aria-pressed="true"] { border: 0; padding: 0; background: none; color: inherit; font: inherit; border-radius: 7px; transition: none; transform: none; }
.stage button:focus-visible, .card:focus-visible, .composer textarea:focus-visible { outline: 2px solid #7181a5; outline-offset: 2px; }

.board-top { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-bottom: 18px; }
.board-top h2 { margin: 0; font-size: 18px; font-weight: 600; letter-spacing: -.02em; }
.board-count { margin-left: 4px; font-size: 13px; font-weight: 400; color: var(--soft); letter-spacing: 0; }
.view-toggle { position: relative; display: inline-flex; padding: 3px; border-radius: 10px; background: var(--cell); box-shadow: inset 0 0 0 1px var(--card-line); }
.view-thumb { position: absolute; top: 3px; bottom: 3px; left: 0; width: var(--thumb-w, 0); translate: var(--thumb-x, 0) 0; border-radius: 7px; background: var(--card); box-shadow: 0 0 0 1px var(--card-line), 0 1px 2px #0000000f; transition: translate 320ms var(--ease), width 320ms var(--ease); }
.view-toggle[data-instant] .view-thumb { transition: none; }
.stage .view-toggle button { position: relative; padding: 6px 12px; font-size: 12px; color: var(--muted); transition: color 200ms; }
.stage .view-toggle button[aria-pressed="true"] { color: var(--accent); }

/* Columns stay at least 212px wide; narrow screens scroll the board sideways. */
.board-scroll { overflow-x: auto; margin: 0 -12px; padding: 0 12px 12px; scroll-snap-type: x proximity; scroll-padding-inline: 12px; overscroll-behavior-x: contain; }
.board { min-width: 896px; }
.heads, .lane-cells { display: grid; grid-template-columns: repeat(4, minmax(212px, 1fr)); gap: 12px; }
.head { display: flex; align-items: center; gap: 7px; height: 32px; padding: 0 4px 0 6px; scroll-snap-align: start; }
.head-name { font-weight: 550; }
.head-count { color: var(--soft); font-variant-numeric: tabular-nums; }
.head[data-over] .head-count { color: var(--warn); }
.badge { display: none; padding: 2px 7px; border-radius: 999px; background: var(--badge); color: var(--warn); font-size: 10.5px; font-weight: 550; animation: badge-in 260ms var(--ease); }
.head[data-over] .badge { display: inline-block; }
.stage .icon-button { margin-left: auto; width: 26px; height: 26px; display: grid; place-items: center; color: var(--soft); border-radius: 7px; }
.stage .icon-button:hover { background: var(--cell); color: var(--ink); }
.stage svg, .card svg { width: 13px; height: 13px; fill: none; stroke: currentColor; stroke-width: 1.4; stroke-linecap: round; stroke-linejoin: round; flex: 0 0 auto; }

.lanes { display: grid; gap: 14px; margin-top: 8px; }
.lane-head { display: flex; align-items: center; gap: 8px; margin: 6px 0 8px 4px; font-size: 13px; font-weight: 500; animation: rise-in 300ms var(--ease) both; }
.lane-count { color: var(--soft); font-weight: 400; }
.cell { position: relative; display: flex; flex-direction: column; gap: 7px; padding: 7px; border-radius: 16px; background: var(--cell); box-shadow: inset 0 0 0 1px transparent; transition: background-color 200ms, box-shadow 200ms; }
.board[data-view="status"] .cell { min-height: 440px; }
.board[data-view="lanes"] .cell { min-height: 92px; animation: cell-in 280ms var(--ease) both; }
.cell[data-over] { background: var(--cell-over); }
.cell[data-target] { background: var(--accent-bg); box-shadow: inset 0 0 0 1px var(--accent-line); }
.cell[data-target][data-warn] { background: var(--warn-bg); box-shadow: inset 0 0 0 1px var(--warn-line); }

.card { position: relative; padding: 10px 12px 10px; border-radius: 12px; background: var(--card); box-shadow: 0 0 0 1px var(--card-line), 0 1px 2px #0000000a; cursor: grab; user-select: none; -webkit-user-select: none; -webkit-touch-callout: none; touch-action: manipulation; transition: box-shadow 180ms, scale 200ms var(--ease); }
.card:hover { box-shadow: 0 0 0 1px var(--card-hover), 0 2px 6px -2px #00000014; }
.card[data-pressing] { scale: .98; }
.card[data-lifted] { position: absolute; left: 0; top: 0; scale: 1.03; cursor: grabbing; box-shadow: 0 0 0 1px var(--accent-line), var(--lift); }
.card[data-grabbed] { scale: 1.02; z-index: 2; box-shadow: 0 0 0 1.5px var(--accent), var(--lift); }
.card-top { display: flex; align-items: center; justify-content: space-between; gap: 8px; color: var(--soft); font-size: 11px; }
.card-id { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 10.5px; letter-spacing: .03em; }
.tag { display: inline-flex; align-items: center; gap: 5px; color: var(--muted); }
.tag::before { content: ''; width: 6px; height: 6px; border-radius: 50%; background: var(--dot); }
.tag[data-tag="billing"] { --dot: var(--billing); } .tag[data-tag="design"] { --dot: var(--design); } .tag[data-tag="api"] { --dot: var(--api); } .tag[data-tag="lifecycle"] { --dot: var(--lifecycle); }
.card-title { margin: 6px 0 9px; font-size: 13px; font-weight: 500; line-height: 1.38; overflow-wrap: anywhere; }
.card-foot { display: flex; align-items: center; gap: 10px; min-height: 22px; color: var(--soft); font-size: 11px; font-variant-numeric: tabular-nums; }
.meta { display: inline-flex; align-items: center; gap: 4px; white-space: nowrap; }
.card-foot .avatar { margin-left: auto; }
.avatar { width: 22px; height: 22px; border-radius: 50%; display: inline-grid; place-items: center; flex: 0 0 auto; font-size: 8.5px; font-weight: 650; letter-spacing: .02em; color: var(--tone); background: var(--tone-bg); box-shadow: 0 0 0 1px color-mix(in srgb, var(--tone) 18%, transparent); }
.avatar.small { width: 20px; height: 20px; }
.avatar.empty { background: none; box-shadow: inset 0 0 0 1.5px var(--card-hover); border: 0; }
[data-person="emma"] { --tone: var(--emma); --tone-bg: var(--emma-bg); }
[data-person="marcus"] { --tone: var(--marcus); --tone-bg: var(--marcus-bg); }
[data-person="chloe"] { --tone: var(--chloe); --tone-bg: var(--chloe-bg); }
[data-person="daniel"] { --tone: var(--daniel); --tone-bg: var(--daniel-bg); }

.slot { flex: 0 0 auto; border-radius: 12px; box-shadow: inset 0 0 0 1.5px color-mix(in srgb, var(--accent) 22%, transparent); background: color-mix(in srgb, var(--accent) 5%, transparent); }
.drag-layer { position: fixed; inset: 0; pointer-events: none; z-index: 30; }
:root[data-dragging], :root[data-dragging] * { cursor: grabbing !important; user-select: none; -webkit-user-select: none; }

.stage .add { display: flex; align-items: center; gap: 6px; height: 30px; padding: 0 7px; color: var(--soft); font-size: 12px; border-radius: 8px; }
.stage .add:hover { color: var(--ink); background: color-mix(in srgb, var(--card) 60%, transparent); }
/* In swimlanes the add row only appears where the pointer or focus is. */
.board[data-view="lanes"] .add { opacity: 0; transition: opacity 160ms; }
.board[data-view="lanes"] .cell:hover .add, .board[data-view="lanes"] .add:focus-visible { opacity: 1; }
:root[data-dragging] .add { visibility: hidden; }
.composer { padding: 8px; border-radius: 12px; background: var(--card); box-shadow: 0 0 0 1px var(--accent-line), 0 2px 8px -4px #0000001f; animation: rise-in 220ms var(--ease) both; }
.composer textarea { display: block; width: 100%; resize: none; border: 0; padding: 2px 4px; background: none; color: var(--ink); font: inherit; font-size: 13px; line-height: 1.38; border-radius: 6px; }
.composer textarea:focus { outline: none; }
.composer-row { display: flex; align-items: center; justify-content: space-between; gap: 8px; margin-top: 6px; }
.composer-hint { color: var(--soft); font-size: 10.5px; }
.stage .composer button { padding: 4px 10px; border-radius: 7px; background: var(--ink); color: var(--bg); font-size: 11.5px; font-weight: 550; }

@keyframes badge-in { from { opacity: 0; scale: .8; } }
@keyframes rise-in { from { opacity: 0; translate: 0 4px; } }
@keyframes cell-in { from { opacity: .4; } }

.controls { justify-content: center; }
.controls .spacer { width: 10px; }
.segmented { display: inline-flex; padding: 2px; border: 1px solid var(--line); border-radius: 7px; }
.segmented button { border: 0; padding: 7px 11px; border-radius: 5px; color: var(--muted); background: transparent; }
.segmented button[aria-pressed="true"] { background: var(--panel); color: var(--ink); }
.status { text-align: center; }
.hint, .demo-note { font-size: 12px; color: var(--muted); text-align: center; line-height: 1.7; max-width: 460px; margin: 6px auto; }

.tricks { border-top: 1px solid var(--line); margin-top: 40px; padding-top: 26px; }
.tricks h2 { font-size: 17px; font-weight: 500; margin: 0 0 26px; }
.tricks h3 { font-size: 14px; font-weight: 550; margin: 0 0 8px; }
.tricks p { color: var(--muted); font-size: 13px; line-height: 1.85; }
.tricks article { margin: 0 0 28px; }
.tricks pre { overflow-x: auto; padding: 14px; background: var(--panel); border-radius: 8px; font-size: 12px; line-height: 1.65; }
.tricks pre:focus-visible { outline: 2px solid #7181a5; outline-offset: 2px; }
.source-links { display: flex; gap: 18px; font-size: 12px; color: var(--muted); }
.source-links a, main > footer a { text-decoration: underline; text-underline-offset: 3px; }
main > footer { font-size: 11px; color: var(--muted); margin-top: 30px; }

/* The 600×400 preview shows the whole board at 62.5%. */
:root[data-preview] .stage { width: 960px; margin: 0; padding: 22px 26px; transform: scale(.625); transform-origin: top left; }
:root[data-preview] .board-scroll { overflow: hidden; }
:root[data-preview] .hint, :root[data-preview] .demo-note, :root[data-preview] .tricks, :root[data-preview] main > footer { display: none; }
:root[data-still] .stage *, :root[data-still] .drag-layer * { transition: none !important; animation: none !important; }
/* The 600px preview iframe also matches this query, so the board rules exclude it. */
@media (max-width: 640px) {
  main { width: calc(100% - 28px); }
  .board-top { flex-wrap: wrap; }
  .board-scroll { margin: 0 -14px; padding: 0 14px 12px; scroll-padding-inline: 14px; }
  :root:not([data-preview]) .board { min-width: 0; width: max-content; }
  :root:not([data-preview]) :is(.heads, .lane-cells) { grid-template-columns: repeat(4, min(78vw, 248px)); }
  :root:not([data-preview]) .board[data-view="status"] .cell { min-height: 360px; }
  .controls button { min-height: 40px; }
  .stage .add { height: 38px; }
  .board[data-view="lanes"] .add { opacity: 1; }
}
@media (hover: none) { .board[data-view="lanes"] .add { opacity: 1; } }