/* ---------- Overview page ---------- */
/* Chart colors: an ordinal blue ramp for migration stage (not started -> in progress ->
   completed) and a sequential blue ramp for counts, each stepped separately for dark mode
   (validated with the dataviz palette checker against the card surfaces). */
#overview {
    --ov-todo: #86b6ef; --ov-doing: #2a78d6; --ov-done: #104281;
    --ov-bar: #2a78d6; --ov-track: rgba(127,127,127,0.12);
    --ov-good: #0ca30c; --ov-serious: #ec835a;
}
[data-theme="dark"] #overview {
    --ov-todo: #184f95; --ov-doing: #3987e5; --ov-done: #9ec5f4;
    --ov-bar: #3987e5; --ov-track: rgba(255,255,255,0.07);
}
.ov-s0 { background: #cde2fb; color: #0b0b0b; } .ov-s1 { background: #b7d3f6; color: #0b0b0b; }
.ov-s2 { background: #9ec5f4; color: #0b0b0b; } .ov-s3 { background: #6da7ec; color: #0b0b0b; }
.ov-s4 { background: #3987e5; color: #fff; }    .ov-s5 { background: #256abf; color: #fff; }
.ov-s6 { background: #184f95; color: #fff; }
[data-theme="dark"] .ov-s0 { background: #104281; color: #fff; } [data-theme="dark"] .ov-s1 { background: #184f95; color: #fff; }
[data-theme="dark"] .ov-s2 { background: #1c5cab; color: #fff; } [data-theme="dark"] .ov-s3 { background: #256abf; color: #fff; }
[data-theme="dark"] .ov-s4 { background: #3987e5; color: #fff; } [data-theme="dark"] .ov-s5 { background: #6da7ec; color: #0b0b0b; }
[data-theme="dark"] .ov-s6 { background: #9ec5f4; color: #0b0b0b; }

#overview-root { max-width: 1500px; margin: 0 auto; display: flex; flex-direction: column; gap: 18px; }
.ov-title { margin: 0; color: var(--text-main); }
.ov-subtitle { margin: 4px 0 0; color: var(--text-muted); }
.ov-card { background: var(--bg-card); border: 1px solid var(--border-color); border-radius: 10px; padding: 18px 20px; min-width: 0; box-sizing: border-box; }
.ov-card-head { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-bottom: 14px; }
.ov-card-head h2 { margin: 0; font-size: 1.05em; color: var(--text-main); }
.ov-card-sub { color: var(--text-muted); font-size: 0.85em; }
.ov-head-btns { margin-left: auto; display: flex; gap: 8px; }
.ov-btn { border: 1px solid var(--border-color); background: transparent; color: var(--text-main); border-radius: 6px; padding: 5px 12px; cursor: pointer; font: inherit; font-size: 0.85em; }
.ov-btn:hover { border-color: #3498db; color: #3498db; }
.ov-note, .ov-empty-text { color: var(--text-muted); font-size: 0.85em; margin: 10px 0 0; }

/* progress */
.ov-progress { display: grid; grid-template-columns: auto 1fr; gap: 6px 28px; align-items: center; }
.ov-hero { grid-row: span 2; }
.ov-hero-num { font-size: 52px; font-weight: 700; line-height: 1; color: var(--text-main); font-variant-numeric: tabular-nums; }
.ov-hero-label { color: var(--text-muted); margin-top: 6px; font-size: 0.9em; }
.ov-stack { display: flex; gap: 2px; overflow: hidden; }
.ov-stack .ov-seg { min-width: 4px; cursor: pointer; }
.ov-stack .ov-seg:first-child { border-radius: 4px 0 0 4px; }
.ov-stack .ov-seg:last-child { border-radius: 0 4px 4px 0; }
.ov-stack .ov-seg:only-child { border-radius: 4px; }
.ov-stack .ov-seg:hover { filter: brightness(1.12); }
.ov-meter { height: 18px; }
.ov-legend { display: flex; flex-wrap: wrap; gap: 6px 16px; align-items: center; }
.ov-legend-item { display: inline-flex; align-items: center; gap: 6px; background: none; border: 0; padding: 2px 0; color: var(--text-muted); font: inherit; font-size: 0.88em; cursor: pointer; }
span.ov-legend-item { cursor: default; }
.ov-legend-item b { color: var(--text-main); }
.ov-legend-note { color: var(--text-muted); font-size: 0.82em; }
.ov-legend-small { margin-left: auto; }
.ov-key { display: inline-block; width: 12px; height: 12px; border-radius: 3px; flex: 0 0 12px; }

/* issue tiles */
.ov-issues { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; }
.ov-tile { background: var(--bg-card); border: 1px solid var(--border-color); border-radius: 10px; padding: 12px 14px; cursor: pointer; transition: border-color 0.15s, transform 0.15s; outline: none; }
.ov-tile:hover, .ov-tile:focus-visible { border-color: #3498db; transform: translateY(-1px); }
.ov-tile.ov-selected { border-color: #3498db; box-shadow: 0 0 0 2px rgba(52,152,219,0.35); }
.ov-tile-top { display: flex; align-items: center; gap: 7px; }
.ov-status-icon { display: inline-flex; width: 16px; height: 16px; flex: 0 0 16px; }
.ov-status-icon svg { width: 16px; height: 16px; }
.ov-has .ov-status-icon { color: var(--ov-serious); }
.ov-zero .ov-status-icon { color: var(--ov-good); }
.ov-tile-label { font-size: 0.85em; font-weight: 600; color: var(--text-main); line-height: 1.2; }
.ov-tile-num { font-size: 34px; font-weight: 700; color: var(--text-main); line-height: 1.1; margin-top: 8px; font-variant-numeric: tabular-nums; }
.ov-zero .ov-tile-num { color: var(--text-muted); }
.ov-tile-sub { font-size: 0.8em; color: var(--text-muted); margin-top: 2px; }

.ov-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.25fr); gap: 18px; }

/* status bars */
.ov-bars { display: flex; flex-direction: column; gap: 4px; }
.ov-bar-row { display: grid; grid-template-columns: 150px 1fr 44px; align-items: center; gap: 10px; padding: 5px 6px; border-radius: 6px; cursor: pointer; outline: none; }
.ov-bar-row:hover, .ov-bar-row:focus-visible { background: var(--ov-track); }
.ov-bar-label { font-size: 0.88em; color: var(--text-main); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.ov-bar-track { height: 14px; }
.ov-bar { display: block; height: 14px; background: var(--ov-bar); border-radius: 0 4px 4px 0; }
.ov-bar-value { text-align: right; font-weight: 700; color: var(--text-main); font-variant-numeric: tabular-nums; }

/* heatmap */
.ov-toggle { margin-left: auto; display: inline-flex; border: 1px solid var(--border-color); border-radius: 6px; overflow: hidden; }
.ov-toggle button { border: 0; background: transparent; color: var(--text-muted); padding: 5px 10px; font: inherit; font-size: 0.82em; cursor: pointer; }
.ov-toggle button.on { background: #3498db; color: #fff; }
.ov-heat-wrap { overflow-x: auto; }
table.ov-heat { border-collapse: separate; border-spacing: 2px; width: 100%; }
#overview table.ov-heat th { font-size: 0.8em; color: var(--text-muted); font-weight: 600; padding: 4px 6px; text-align: center; white-space: nowrap; background: none !important; position: static !important; border: 0; text-transform: none; }
#overview table.ov-heat tbody th { text-align: left; color: var(--text-main); font-size: 0.88em; }
table.ov-heat td { padding: 0; text-align: center; border: 0; background: none; }
.ov-heat-cell { display: flex; align-items: center; justify-content: center; min-width: 44px; height: 36px; border-radius: 4px; font-weight: 700; font-variant-numeric: tabular-nums; cursor: pointer; outline: none; }
.ov-heat-cell:hover, .ov-heat-cell:focus-visible { box-shadow: 0 0 0 2px var(--bg-card), 0 0 0 4px #3498db; }
.ov-heat-none { color: var(--text-muted); opacity: 0.5; }
.ov-heat-sum { font-weight: 700; color: var(--text-main); cursor: pointer; padding: 6px; border-radius: 4px; }
.ov-heat-sum:hover { background: var(--ov-track); }

/* calendar */
.ov-months { display: grid; grid-template-columns: repeat(auto-fill, minmax(330px, 1fr)); gap: 22px; }
.ov-month-name { font-weight: 700; color: var(--text-main); margin-bottom: 8px; }
.ov-cal { display: grid; grid-template-columns: repeat(7, minmax(0, 1fr)); gap: 3px; }
.ov-dow { font-size: 0.72em; color: var(--text-muted); text-align: center; padding-bottom: 2px; }
.ov-day { position: relative; min-height: 50px; border-radius: 6px; background: var(--ov-track); padding: 4px 5px; box-sizing: border-box; display: flex; flex-direction: column; outline: none; }
.ov-day.ov-pad { background: none; }
.ov-day.ov-weekend:not(.ov-has-day) { opacity: 0.45; }
.ov-day-num { font-size: 0.72em; color: var(--text-muted); }
.ov-day-count { font-size: 1.05em; font-weight: 700; color: var(--text-main); margin-top: auto; font-variant-numeric: tabular-nums; }
.ov-day-bar { height: 6px; margin-top: 3px; }
.ov-has-day { cursor: pointer; background: var(--bg-card); border: 1px solid var(--border-color); }
.ov-has-day:hover, .ov-has-day:focus-visible, .ov-day.ov-selected { border-color: #3498db; box-shadow: 0 0 0 1px #3498db; }
.ov-today { box-shadow: inset 0 0 0 2px #3498db; }
.ov-today .ov-day-num { color: #3498db; font-weight: 700; }

/* drill-down */
.ov-drill[hidden] { display: none; }
.ov-table-wrap { max-height: 520px; overflow: auto; border-top: none; }

/* tooltip */
.ov-tip { position: fixed; z-index: 4000; display: none; pointer-events: none; background: var(--bg-card); color: var(--text-main); border: 1px solid var(--border-color); border-radius: 8px; padding: 8px 10px; box-shadow: 0 6px 20px rgba(0,0,0,0.25); font-size: 0.85em; max-width: 260px; }
.ov-tip-value { font-weight: 700; font-size: 1.15em; }
.ov-tip-label { color: var(--text-muted); margin-bottom: 4px; }
.ov-tip-row { display: flex; align-items: center; gap: 6px; }
.ov-tip-row .ov-key { width: 10px; height: 3px; border-radius: 2px; flex-basis: 10px; }

@media (max-width: 1100px) {
    .ov-grid { grid-template-columns: minmax(0, 1fr); }
}
@media (max-width: 900px) {
    .ov-issues { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 700px) {
    .ov-progress { grid-template-columns: 1fr; }
    .ov-hero { grid-row: auto; }
    .ov-hero-num { font-size: 44px; }
    .ov-issues { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; }
    .ov-tile { padding: 10px; }
    .ov-tile-num { font-size: 28px; }
    .ov-card { padding: 14px; }
    .ov-bar-row { grid-template-columns: 112px 1fr 36px; gap: 6px; }
    .ov-months { grid-template-columns: minmax(0, 1fr); }
    .ov-day { min-height: 44px; padding: 3px; }
    .ov-legend-small { margin-left: 0; }
    .ov-head-btns { margin-left: 0; }
}
@media (max-width: 700px) {
    #overview table.ov-heat th { padding: 4px 3px; font-size: 0.72em; }
    #overview table.ov-heat tbody th { font-size: 0.78em; padding-right: 6px; }
    .ov-heat-cell { min-width: 34px; height: 34px; }
    .ov-bar-row { grid-template-columns: 128px 1fr 32px; }
    .ov-bar-label { font-size: 0.82em; }
}
/* the drill-down list scrolls inside its card, so its header sticks to the card's top */
#overview .ov-table thead th { top: 0 !important; z-index: 2; }