/* ==========================================================================
   Backlogs: backlog lists, taskboard, burndown chart, settings
   ========================================================================== */

/* ---------- Backlog page ---------- */
.backlogs-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 20px; align-items: start; }
.backlogs-col { display: flex; flex-direction: column; gap: 14px; min-width: 0; }
.backlogs-col-title { display: flex; align-items: center; gap: 8px; margin: 0; font-size: .82rem; text-transform: uppercase; letter-spacing: .5px; color: var(--text-muted); }
.backlog { overflow: visible; }
.backlog.is-current { border-color: color-mix(in srgb, var(--primary) 45%, var(--border)); box-shadow: 0 0 0 1px color-mix(in srgb, var(--primary) 25%, transparent), var(--shadow-sm); }
.backlog-header { display: flex; align-items: center; gap: 8px; padding: 10px 10px 10px 8px; border-bottom: 1px solid var(--border); }
.backlog.is-collapsed .backlog-header { border-bottom: 0; }
.backlog-toggle { width: 26px; height: 26px; border: 0; background: none; border-radius: var(--radius-sm); color: var(--text-muted); cursor: pointer; display: inline-grid; place-items: center; flex-shrink: 0; padding: 0; }
.backlog-toggle:hover { background: var(--bg-hover); color: var(--text); }
.backlog-toggle .icon { transition: transform .15s; }
.backlog.is-collapsed .backlog-toggle .icon, .tb-row.is-collapsed .backlog-toggle .icon { transform: rotate(-90deg); }
.backlog-title { flex: 1 1 auto; min-width: 0; }
.backlog-title h2 { margin: 0; font-size: 1.02rem; display: flex; align-items: center; gap: 6px; flex-wrap: wrap; }
.backlog-title h2 a { color: var(--text); }
.backlog-title h2 .badge { font-weight: 500; }
.backlog-dates { display: flex; align-items: center; gap: 4px; margin-top: 1px; }
.backlog-dates .icon { width: 13px; height: 13px; }
.backlog-velocity { display: flex; flex-direction: column; align-items: flex-end; line-height: 1.1; padding: 0 4px; }
.backlog-velocity-value { font-weight: 700; font-size: 1.05rem; font-variant-numeric: tabular-nums; display: inline-flex; gap: 2px; }
.backlog-velocity-label { font-size: .72rem; color: var(--text-faint); text-transform: uppercase; letter-spacing: .4px; }
.backlog.is-collapsed .backlog-body { display: none; }
.story-new { display: flex; gap: 6px; align-items: center; padding: 8px 10px; border-bottom: 1px solid var(--border); background: var(--bg-subtle); flex-wrap: wrap; }
.story-new-subject { flex: 1 1 200px; min-width: 0; }
.story-new-type { width: auto; max-width: 150px; }
.story-new-points { width: 70px; }
.story-list { list-style: none; margin: 0; padding: 4px 0; min-height: 44px; }
.story {
  display: grid; grid-template-columns: 16px 4px auto minmax(0, 1fr) auto 24px 42px; align-items: center; gap: 8px;
  padding: 6px 10px 6px 6px; border-bottom: 1px solid var(--border); background: var(--surface); position: relative;
}
.story:last-of-type { border-bottom-color: transparent; }
.story:hover { background: var(--bg-hover); }
.story.is-done .story-subject { color: var(--text-muted); text-decoration: line-through; text-decoration-color: color-mix(in srgb, var(--text-muted) 50%, transparent); }
.story.is-saving { opacity: .55; }
.story.is-new { animation: board-card-in .9s ease; }
.story.sortable-ghost { border: 1px solid var(--border); border-radius: var(--radius); }
.backlogs-grid.can-drag .story { cursor: grab; }
.story-handle { color: var(--text-faint); display: inline-grid; place-items: center; opacity: .5; }
.story:hover .story-handle { opacity: 1; }
.story-handle .icon { width: 14px; height: 14px; }
.story:not(:has(.story-handle)) { grid-template-columns: 0 4px auto minmax(0, 1fr) auto 24px 42px; }
.story-type { width: 4px; height: 22px; border-radius: 2px; background: var(--type-c); }
.story-id { color: var(--text-muted); font-size: .85rem; font-variant-numeric: tabular-nums; }
.story-subject { color: var(--text); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.story-subject:hover { color: var(--link); }
.story-status .status-badge { font-size: .76rem; }
.story-assignee { display: inline-flex; justify-content: center; }
.story-points {
  justify-self: end; min-width: 34px; height: 24px; padding: 0 7px; border-radius: 12px; border: 1px solid transparent; background: var(--bg-muted);
  font: inherit; font-weight: 700; font-size: .86rem; color: var(--text); display: inline-grid; place-items: center; font-variant-numeric: tabular-nums;
}
.story-points.is-editable { cursor: pointer; }
.story-points.is-editable:hover { border-color: var(--primary); background: var(--primary-soft); color: var(--primary); }
.story-points-input { width: 58px !important; justify-self: end; text-align: right; }
.story-empty { list-style: none; padding: 14px; margin: 6px 10px; text-align: center; color: var(--text-faint); border: 2px dashed var(--border); border-radius: var(--radius); font-size: .9rem; }
.backlogs-hidden summary { cursor: pointer; list-style: none; }
.backlogs-hidden summary::-webkit-details-marker { display: none; }
.backlogs-hidden summary h3 { display: flex; align-items: center; gap: 8px; }
.backlogs-hidden .list-plain > li { gap: 8px; }

/* ---------- Taskboard ---------- */
.taskboard-scroll { overflow-x: auto; border: 1px solid var(--border); border-radius: var(--radius-lg); background: var(--surface); }
.taskboard { --tb-story-w: 260px; --tb-col-w: 200px; min-width: calc(var(--tb-story-w) + var(--tb-cols) * var(--tb-col-w)); }
.tb-head-row, .tb-row { display: grid; grid-template-columns: var(--tb-story-w) repeat(var(--tb-cols), minmax(var(--tb-col-w), 1fr)); }
.tb-head-row { position: sticky; top: 0; z-index: 2; background: var(--bg-subtle); border-bottom: 1px solid var(--border); }
.tb-head { padding: 9px 10px; font-weight: 600; font-size: .86rem; display: flex; align-items: center; gap: 6px; border-left: 1px solid var(--border); min-width: 0; }
.tb-head-story { border-left: 0; position: sticky; left: 0; background: var(--bg-subtle); z-index: 1; color: var(--text-muted); text-transform: uppercase; font-size: .78rem; letter-spacing: .4px; }
.tb-head-dot { width: 9px; height: 9px; border-radius: 50%; background: var(--c); flex-shrink: 0; }
.tb-head .counter { margin-left: auto; }
.tb-row { border-bottom: 1px solid var(--border); }
.tb-row:last-child { border-bottom: 0; }
.tb-story { position: sticky; left: 0; z-index: 1; background: var(--surface); padding: 10px 10px 10px 12px; border-left: 4px solid var(--type-c, var(--border-strong)); display: flex; flex-direction: column; gap: 6px; box-shadow: 1px 0 0 var(--border); }
.tb-story-top { display: flex; align-items: center; gap: 6px; }
.tb-story-top .story-points { margin-left: auto; }
.tb-story-top .backlog-toggle { width: 22px; height: 22px; margin-left: -4px; }
.tb-story-subject { color: var(--text); font-weight: 500; line-height: 1.35; word-break: break-word; }
.tb-story-meta { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; }
.tb-story-meta .counter { margin-left: auto; }
.tb-add { align-self: flex-start; }
.tb-task-form { display: flex; flex-direction: column; gap: 6px; padding: 8px; background: var(--bg-subtle); border: 1px solid var(--border); border-radius: var(--radius); }
.tb-task-form .tb-hours { width: 100%; }
.tb-cell { border-left: 1px solid var(--border); padding: 8px; display: flex; flex-direction: column; gap: 6px; min-height: 64px; background: var(--bg); }
.tb-row:nth-child(even) .tb-cell { background: color-mix(in srgb, var(--bg-subtle) 50%, var(--bg)); }
.tb-row.is-collapsed .tb-cell > *, .tb-row.is-collapsed .tb-story > :not(.tb-story-top):not(.tb-story-subject) { display: none; }
.tb-row.is-collapsed .tb-cell { min-height: 0; }
.taskboard.hide-done .tb-row.is-done { display: none; }
.tb-impediments .tb-story { border-left-color: var(--danger); }
.tb-impediments .tb-story strong { display: inline-flex; align-items: center; gap: 6px; color: var(--danger); }
.tb-task {
  background: color-mix(in srgb, var(--warning-soft) 70%, var(--surface)); border: 1px solid color-mix(in srgb, var(--warning) 25%, var(--border));
  border-radius: var(--radius); padding: 6px 8px; display: flex; flex-direction: column; gap: 3px; box-shadow: var(--shadow-sm); font-size: .9rem;
}
.tb-task.is-draggable { cursor: grab; }
.tb-task.is-closed { background: var(--bg-subtle); border-color: var(--border); }
.tb-task.is-closed .tb-task-subject { color: var(--text-muted); }
.tb-task.is-saving { opacity: .55; }
.tb-task.is-new { animation: board-card-in .9s ease; }
.tb-task-top { display: flex; align-items: center; gap: 6px; }
.tb-task-id { color: var(--text-muted); font-size: .8rem; }
.tb-task-remaining { margin-left: auto; font-weight: 600; font-size: .8rem; font-variant-numeric: tabular-nums; }
.tb-task-subject { color: var(--text); line-height: 1.3; word-break: break-word; }
.tb-task-bottom { display: flex; align-items: center; gap: 5px; font-size: .8rem; color: var(--text-muted); min-width: 0; }

/* ---------- Burndown ---------- */
.burndown-card .card-header { flex-wrap: wrap; }
.burndown-legend { display: flex; flex-wrap: wrap; gap: 4px 6px; font-size: .88rem; }
.burndown-legend .checkbox { margin-right: 8px; }
.legend-swatch { display: inline-block; width: 18px; height: 0; border-top: 3px solid; border-radius: 2px; vertical-align: middle; }
.s-points { --s: var(--primary); }
.s-points-ideal { --s: var(--text-faint); }
.s-hours { --s: var(--warning); }
.s-hours-ideal { --s: color-mix(in srgb, var(--warning) 45%, var(--text-faint)); }
.s-scope { --s: var(--danger); }
.legend-swatch { border-color: var(--s); }
.legend-swatch.s-points-ideal, .legend-swatch.s-hours-ideal { border-top-style: dashed; }
.burndown-body { padding: 10px 6px 4px; }
.burndown-chart { width: 100%; height: auto; display: block; overflow: visible; font-family: var(--font); }
.bd-grid line { stroke: var(--border); stroke-width: 1; }
.bd-grid .bd-baseline { stroke: var(--border-strong); }
.bd-axis { fill: var(--text-muted); font-size: 11px; }
.bd-axis-weekday { fill: var(--text-faint); font-size: 10px; }
.bd-axis-right { fill: var(--warning); }
.bd-axis-title { fill: var(--text-faint); font-size: 11px; letter-spacing: .4px; text-transform: uppercase; }
.bd-line { fill: none; stroke: var(--s); stroke-width: 2.5; stroke-linejoin: round; stroke-linecap: round; }
.bd-line.s-points-ideal, .bd-line.s-hours-ideal { stroke-width: 1.6; stroke-dasharray: 6 5; }
.bd-dot { fill: var(--surface); stroke: var(--s); stroke-width: 2; }
.bd-dot:hover { r: 5.5; }
.bd-today { stroke: var(--primary); stroke-width: 1; stroke-dasharray: 3 3; opacity: .6; }
.bd-today-label { fill: var(--primary); font-size: 10px; font-weight: 600; }
.burndown-chart.hide-points .s-points, .burndown-chart.hide-points-ideal .s-points-ideal, .burndown-chart.hide-hours .s-hours,
.burndown-chart.hide-hours-ideal .s-hours-ideal, .burndown-chart.hide-scope .s-scope { display: none; }
.burndown-chart.hide-hours .bd-axis-right { opacity: .3; }
.burndown-stats .stat-value { font-variant-numeric: tabular-nums; }
details.card > summary { cursor: pointer; list-style: none; }
details.card > summary::-webkit-details-marker { display: none; }
details.card:not([open]) > summary { border-bottom: 0; }

/* ---------- Settings ---------- */
.stack-sm { display: flex; flex-direction: column; gap: 2px; }
.backlogs-status-option { margin: 0; }

@media (max-width: 1100px) {
  .backlogs-grid { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .story { grid-template-columns: 16px 4px auto minmax(0, 1fr) 42px; row-gap: 2px; }
  .story-status, .story-assignee { display: none; }
  .taskboard { --tb-story-w: 170px; --tb-col-w: 170px; }
  .backlog-velocity-label { display: none; }
}