/* Phase 7B: URL-backed history workspace. */
.history-page-header{align-items:flex-end}.history-header-actions{display:flex;gap:.65rem}.history-status{margin:-.7rem 0 1rem;color:var(--muted);font-size:.8rem}.history-workspace{display:grid;gap:1rem}.history-chart-card{position:relative;display:grid;grid-template-rows:auto auto minmax(120px,1fr);min-height:300px;height:420px;overflow:hidden;border:1px solid rgba(23,122,107,.13);border-radius:18px;background:var(--panel);box-shadow:var(--shadow)}.history-chart-heading{display:flex;align-items:flex-start;justify-content:space-between;gap:1rem;padding:1rem 1rem .7rem}.history-chart-heading h3{margin:0;font-size:1.2rem}.history-remove-chart{display:grid;place-items:center;width:32px;height:32px;border:1px solid var(--line);border-radius:50%;background:var(--panel-soft);color:var(--text);font:700 1.2rem/1 inherit;cursor:pointer}.history-remove-chart:hover,.history-remove-chart:focus-visible{border-color:var(--danger);outline:2px solid rgba(185,61,53,.15)}.history-chart-controls{display:grid;grid-template-columns:minmax(150px,220px) minmax(280px,1fr) minmax(200px,280px);gap:1rem;padding:0 1rem .85rem;border-bottom:1px solid var(--line)}.history-field,.history-device-field{display:grid;align-content:start;gap:.42rem;min-width:0}.history-field>span,.history-device-field legend{color:var(--text);font-size:.78rem;font-weight:700}.history-field select{width:100%;min-height:40px;border:1px solid var(--line);border-radius:8px;background:var(--panel);color:var(--text);padding:.55rem .65rem;font:inherit}.history-device-field{margin:0;border:0;padding:0}.history-device-actions{display:flex;gap:.35rem}.history-device-actions button{border:0;background:none;color:var(--accent);padding:0;font:700 .7rem/1.3 inherit;cursor:pointer}.history-device-list{display:flex;gap:.35rem;overflow-x:auto;padding:.1rem 0 .25rem;scrollbar-width:thin}.history-device-option{display:flex;flex:0 0 auto;align-items:center;gap:.32rem;border:1px solid var(--line);border-radius:999px;padding:.35rem .55rem;background:var(--panel-soft);font-size:.72rem;cursor:pointer}.history-device-option:has(input:checked){border-color:var(--accent);background:rgba(23,122,107,.1)}.history-device-option input{margin:0;accent-color:var(--accent)}.history-period{width:100%;accent-color:var(--accent)}.history-period-label{color:var(--accent)}.history-chart-surface{position:relative;min-height:120px;margin:.7rem 1rem 1rem;overflow:hidden;border:1px solid var(--line);border-radius:12px;background:var(--panel-soft)}.history-chart-svg{display:block;width:100%;height:100%;min-height:120px}.history-chart-message{position:absolute;inset:0;z-index:2;display:grid;place-items:center;padding:1rem;color:var(--muted);text-align:center}.history-chart-message[hidden]{display:none}.history-chart-legend{display:flex;flex-wrap:wrap;gap:.4rem .9rem;padding:.45rem 1rem 0;color:var(--muted);font-size:.72rem}.history-legend-item{display:inline-flex;align-items:center;gap:.35rem}.history-legend-swatch{width:18px;height:3px;border-radius:99px}.history-chart-meta{position:absolute;right:10px;top:8px;color:var(--muted);font-size:.65rem}.history-chart-tooltip{position:absolute;z-index:4;max-width:240px;padding:.55rem .65rem;border:1px solid var(--line);border-radius:8px;background:var(--panel);box-shadow:var(--shadow);color:var(--text);font-size:.7rem;line-height:1.45;pointer-events:none}.history-chart-tooltip strong{display:block;margin-bottom:.15rem}.history-chart-tooltip span{display:block;color:var(--muted)}.history-chart-tooltip i{display:inline-block;width:8px;height:8px;margin-right:.35rem;border-radius:50%}.history-chart-svg .grid{stroke:var(--line);stroke-width:1}.history-chart-svg .axis-label{fill:var(--muted);font:11px system-ui,sans-serif}.history-chart-svg .series-line{fill:none;stroke-width:2;stroke-linejoin:round;stroke-linecap:round}.history-chart-svg .hover-line{stroke:var(--muted);stroke-width:1;stroke-dasharray:4 4}.history-chart-svg .hover-dot{stroke:var(--panel);stroke-width:2}.history-chart-svg .plot-hit{fill:transparent;pointer-events:all}.history-resize-handle{position:absolute;right:4px;bottom:4px;width:24px;height:16px;cursor:ns-resize;background:linear-gradient(135deg,transparent 50%,var(--line) 51%,var(--line) 58%,transparent 59%,transparent 68%,var(--line) 69%,var(--line) 76%,transparent 77%)}.history-empty{padding:2rem;border:1px dashed var(--line);border-radius:16px;color:var(--muted);text-align:center}@media(max-width:820px){.history-chart-controls{grid-template-columns:1fr 1fr}.history-device-field{grid-column:1/-1}.history-header-actions{align-items:stretch;flex-direction:column}}@media(max-width:560px){.history-chart-controls{grid-template-columns:1fr}.history-device-field{grid-column:auto}.history-chart-card{height:auto!important;min-height:0}.history-chart-surface,.history-chart-svg{min-height:220px}.history-resize-handle{display:none}}



/* Phase 7D fixed: accurate hover, collapsible criteria, and correct grid allocation. */
.history-chart-card{grid-template-rows:auto auto auto minmax(120px,1fr)}
.history-chart-heading{grid-row:1}
.history-chart-controls{grid-row:2}
.history-chart-legend{grid-row:3;gap:.35rem .8rem;padding:.3rem 1rem 0;line-height:1.2}
.history-chart-surface{grid-row:4;margin:.45rem 1rem 1rem}
.history-chart-heading-actions{display:flex;align-items:center;gap:.4rem}
.history-toggle-controls{display:grid;place-items:center;width:32px;height:32px;border:1px solid var(--line);border-radius:50%;background:var(--panel-soft);color:var(--muted);font:700 .72rem/1 inherit;cursor:pointer}
.history-toggle-controls:hover,.history-toggle-controls:focus-visible{border-color:var(--accent);color:var(--accent);outline:2px solid rgba(23,122,107,.15)}
.history-chart-card.controls-hidden{grid-template-rows:auto auto minmax(120px,1fr)}
.history-chart-card.controls-hidden .history-chart-controls{display:none}
.history-chart-card.controls-hidden .history-chart-legend{grid-row:2}
.history-chart-card.controls-hidden .history-chart-surface{grid-row:3}


/* Phase 7D resize drag stability v2. */
.history-resize-handle{touch-action:none}.history-resizing,.history-resizing *{user-select:none!important}.history-chart-card.is-resizing{overflow-anchor:none}