/*
  FamilyBrowserNextGen.Ui — tokens and component styles (Phase 5). No third-party CSS.
  Light tokens on :root; dark on [data-theme="dark"], and on prefers-color-scheme: dark unless data-theme="light".
  Accent matches the Revit add-in (#1f5f9e).
*/
:root {
    --ground: #f3f5f8;
    --panel: #ffffff;
    --panel-alt: #f7f9fb;
    --ink: #14212e;
    --ink-2: #3d4a58;
    --muted: #5a6878;
    --line: #dde3ea;
    --line-soft: #edf1f5;
    --line-strong: #b9c4d0;
    --accent: #1f5f9e;
    --accent-hover: #174a7c;
    --accent-soft: #e8f0f9;
    --accent-line: #b9d2ea;
    --on-accent: #ffffff;
    --rail: #0f2a44;
    --rail-2: #143452;
    --rail-line: #284766;
    --rail-ink: #c9d6e3;
    --rail-muted: #8aa3bb;
    --success: #1d7a4a;
    --success-soft: #e6f4ec;
    --warning: #a35a00;
    --warning-ink: #6b3d00;
    --warning-soft: #fff6e8;
    --warning-line: #f0d3a6;
    --danger: #b42318;
    --danger-soft: #fdecea;
    --danger-line: #f1c5c0;
    --focus: #1f5f9e;
    --shadow: 0 8px 24px rgba(15, 42, 68, 0.12);
    --series-1: #1f5f9e;
    --series-2: #c2621b;

    --font: "IBM Plex Sans", "Segoe UI", system-ui, sans-serif;
    --mono: "IBM Plex Mono", "Cascadia Mono", Consolas, monospace;
    --radius: 8px;
    --radius-lg: 12px;

    color-scheme: light;
}

:root[data-theme="dark"] {
    --ground: #141d27;
    --panel: #1b2633;
    --panel-alt: #212e3d;
    --ink: #eef1f5;
    --ink-2: #d2d9e1;
    --muted: #b8c4d1;
    --line: #2c3a4a;
    --line-soft: #253242;
    --line-strong: #435468;
    --accent: #5aa9e6;
    --accent-hover: #7dbcec;
    --accent-soft: #24384f;
    --accent-line: #34506f;
    --on-accent: #0b1520;
    --rail: #0b1520;
    --rail-2: #13202e;
    --rail-line: #22344a;
    --rail-ink: #c9d6e3;
    --rail-muted: #8aa3bb;
    --success: #5fd08f;
    --success-soft: #173326;
    --warning: #f0b35a;
    --warning-ink: #f6cf95;
    --warning-soft: #33270f;
    --warning-line: #5a4419;
    --danger: #ff8a80;
    --danger-soft: #3a1c1a;
    --danger-line: #6a2f2a;
    --focus: #7dbcec;
    --shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
    --series-1: #3987e5;
    --series-2: #d95926;
    color-scheme: dark;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        --ground: #141d27;
        --panel: #1b2633;
        --panel-alt: #212e3d;
        --ink: #eef1f5;
        --ink-2: #d2d9e1;
        --muted: #b8c4d1;
        --line: #2c3a4a;
        --line-soft: #253242;
        --line-strong: #435468;
        --accent: #5aa9e6;
        --accent-hover: #7dbcec;
        --accent-soft: #24384f;
        --accent-line: #34506f;
        --on-accent: #0b1520;
        --rail: #0b1520;
        --rail-2: #13202e;
        --rail-line: #22344a;
        --success: #5fd08f;
        --success-soft: #173326;
        --warning: #f0b35a;
        --warning-ink: #f6cf95;
        --warning-soft: #33270f;
        --warning-line: #5a4419;
        --danger: #ff8a80;
        --danger-soft: #3a1c1a;
        --danger-line: #6a2f2a;
        --focus: #7dbcec;
        --shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
        --series-1: #3987e5;
        --series-2: #d95926;
        color-scheme: dark;
    }
}

/* ---------------------------------------------------------------- base */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; }
body {
    background: var(--ground);
    color: var(--ink);
    font-family: var(--font);
    font-size: 14px;
    line-height: 1.45;
    -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); }
a:hover { color: var(--accent-hover); }
h1, h2, h3 { margin: 0; font-weight: 600; letter-spacing: -0.01em; }
:focus-visible { outline: 2px solid var(--focus); outline-offset: 2px; }
.ui-mono { font-family: var(--mono); }
.ui-spacer { flex: 1 1 auto; }
.ui-visually-hidden {
    position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px;
    overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.ui-icon { flex: none; display: inline-block; vertical-align: middle; }

/* ---------------------------------------------------------------- buttons */
.ui-btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 8px;
    min-height: 40px; padding: 0 16px; border-radius: var(--radius);
    border: 1px solid transparent; font: inherit; font-weight: 500; cursor: pointer;
    text-decoration: none; white-space: nowrap; transition: background-color .12s, border-color .12s;
}
.ui-btn:disabled { cursor: not-allowed; opacity: .6; }
.ui-btn-sm { min-height: 34px; padding: 0 12px; font-size: 13px; }
.ui-btn-block { width: 100%; min-height: 48px; }
.ui-btn-primary { background: var(--accent); color: var(--on-accent); font-weight: 600; }
.ui-btn-primary:hover:not(:disabled) { background: var(--accent-hover); }
.ui-btn-secondary { background: var(--panel); color: var(--ink); border-color: var(--line); }
.ui-btn-secondary:hover:not(:disabled) { background: var(--panel-alt); border-color: var(--line-strong); }
.ui-btn-danger { background: var(--panel); color: var(--danger); border-color: var(--danger-line); }
.ui-btn-danger:hover:not(:disabled) { background: var(--danger-soft); }
.ui-btn-ghost { background: transparent; color: var(--ink); }
.ui-btn-ghost:hover:not(:disabled) { background: var(--panel-alt); }
.ui-icon-btn {
    display: inline-flex; align-items: center; justify-content: center;
    width: 40px; height: 40px; border-radius: var(--radius); border: 1px solid transparent;
    background: transparent; color: inherit; cursor: pointer;
}
.ui-icon-btn:hover { background: var(--panel-alt); }

/* ---------------------------------------------------------------- fields */
.ui-field { display: flex; flex-direction: column; gap: 6px; }
.ui-field-label-row { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; }
.ui-field-label { font-weight: 500; }
.ui-input-wrap {
    display: flex; align-items: center; min-height: 44px;
    background: var(--panel); border: 1px solid var(--line-strong); border-radius: var(--radius);
}
.ui-input-wrap:focus-within { border-color: var(--focus); box-shadow: 0 0 0 1px var(--focus); }
.ui-input-icon { margin-left: 12px; color: var(--muted); }
.ui-input {
    flex: 1; min-width: 0; height: 42px; padding: 0 12px; border: 0; outline: none;
    background: transparent; color: var(--ink); font: inherit; font-size: 15px;
}
.ui-input::placeholder { color: var(--muted); opacity: 1; }
.ui-input-button {
    display: inline-flex; align-items: center; justify-content: center;
    width: 44px; height: 42px; border: 0; background: transparent; color: var(--muted); cursor: pointer;
}
.ui-field-message { font-size: 13px; color: var(--muted); }
.ui-field-error .ui-input-wrap { border-color: var(--danger); box-shadow: 0 0 0 1px var(--danger); }
.ui-field-error .ui-field-message, .ui-field-error .ui-field-label { color: var(--danger); }

.ui-check, .ui-switch { display: inline-flex; align-items: center; gap: 10px; cursor: pointer; min-height: 32px; }
.ui-check input { width: 18px; height: 18px; accent-color: var(--accent); margin: 0; }
.ui-switch { position: relative; }
.ui-switch input { position: absolute; opacity: 0; width: 40px; height: 22px; margin: 0; cursor: pointer; }
.ui-switch-track {
    position: relative; width: 40px; height: 22px; border-radius: 11px; flex: none;
    background: var(--line-strong); transition: background-color .15s;
}
.ui-switch-thumb {
    position: absolute; top: 3px; left: 3px; width: 16px; height: 16px; border-radius: 50%;
    background: #ffffff; transition: transform .15s;
}
.ui-switch input:checked + .ui-switch-track { background: var(--accent); }
.ui-switch input:checked + .ui-switch-track .ui-switch-thumb { transform: translateX(18px); }
.ui-switch input:focus-visible + .ui-switch-track { outline: 2px solid var(--focus); outline-offset: 2px; }
.is-disabled { opacity: .6; cursor: not-allowed; }

/* ---------------------------------------------------------------- banners, badges */
.ui-banner {
    display: flex; align-items: flex-start; gap: 12px; padding: 14px 16px;
    border-radius: var(--radius-lg); border: 1px solid var(--line); background: var(--panel);
}
.ui-banner-icon { margin-top: 1px; }
.ui-banner-body { flex: 1; min-width: 0; display: flex; flex-direction: column; gap: 2px; }
.ui-banner-title { font-weight: 600; }
.ui-banner-actions { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.ui-banner.tone-info { background: var(--accent-soft); border-color: var(--accent-line); }
.ui-banner.tone-info .ui-banner-icon { color: var(--accent); }
.ui-banner.tone-success { background: var(--success-soft); border-color: transparent; }
.ui-banner.tone-success .ui-banner-icon { color: var(--success); }
.ui-banner.tone-warning { background: var(--warning-soft); border-color: var(--warning-line); color: var(--warning-ink); }
.ui-banner.tone-warning .ui-banner-icon { color: var(--warning); }
.ui-banner.tone-danger { background: var(--danger-soft); border-color: var(--danger-line); }
.ui-banner.tone-danger .ui-banner-icon { color: var(--danger); }

.ui-badge {
    display: inline-flex; align-items: center; gap: 6px; padding: 2px 10px;
    border-radius: 999px; font-size: 12px; font-weight: 500; white-space: nowrap;
    background: var(--panel-alt); color: var(--ink-2);
}
.ui-badge.ui-mono { border-radius: 4px; padding: 1px 6px; font-size: 11px; }
.ui-badge.tone-info { background: var(--accent-soft); color: var(--accent); }
.ui-badge.tone-success { background: var(--success-soft); color: var(--success); }
.ui-badge.tone-warning { background: var(--warning-soft); color: var(--warning-ink); }
.ui-badge.tone-danger { background: var(--danger-soft); color: var(--danger); }

/* ---------------------------------------------------------------- panels, tiles, empty */
.ui-panel {
    background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius-lg);
    padding: 20px; min-width: 0;
}
.ui-panel-flush { padding: 0; overflow: hidden; }
.ui-panel-flush > .ui-panel-head { padding: 18px 20px 12px; }
.ui-panel-head { display: flex; flex-wrap: wrap; align-items: baseline; gap: 8px 12px; margin-bottom: 14px; }
.ui-panel-title { font-size: 16px; }
.ui-panel-subtitle { font-size: 13px; color: var(--muted); }

.ui-stat {
    display: flex; flex-direction: column; gap: 6px; padding: 18px;
    background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius-lg); min-width: 0;
}
.ui-stat-label { font-size: 13px; color: var(--muted); }
.ui-stat-value { font-family: var(--mono); font-size: 28px; font-weight: 500; line-height: 1.1; }
.ui-stat-unit { font-size: 15px; color: var(--muted); }
.ui-stat-note { font-size: 13px; color: var(--muted); }
.ui-stat-note.tone-success { color: var(--success); }
.ui-stat-note.tone-warning { color: var(--warning); }
.ui-stat-note.tone-danger { color: var(--danger); }

.ui-empty {
    display: flex; flex-direction: column; align-items: center; text-align: center; gap: 10px;
    padding: 48px 24px; border: 1px dashed var(--line-strong); border-radius: var(--radius-lg);
}
.ui-empty-icon {
    display: inline-flex; align-items: center; justify-content: center; width: 56px; height: 56px;
    border-radius: 50%; background: var(--accent-soft); color: var(--accent);
}
.ui-empty-title { font-size: 18px; }
.ui-empty-text { max-width: 520px; color: var(--muted); }
.ui-empty-actions { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; margin-top: 6px; }

/* ---------------------------------------------------------------- spinner */
.ui-spinner {
    display: inline-block; flex: none; border-radius: 50%;
    border: 2px solid currentColor; border-right-color: transparent;
    animation: ui-spin .7s linear infinite; opacity: .85;
}
@keyframes ui-spin { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) {
    .ui-spinner { animation-duration: 2s; }
    * { transition: none !important; }
}

/* ---------------------------------------------------------------- small icon button, popover */
.ui-icon-btn-sm { width: 30px; height: 30px; }
.ui-popover-anchor { position: relative; }
.ui-popover-scrim { position: fixed; inset: 0; z-index: 30; border: 0; background: transparent; cursor: default; }
.ui-popover {
    position: absolute; right: 0; top: calc(100% + 6px); z-index: 31; min-width: 220px; max-height: 360px; overflow: auto;
    display: flex; flex-direction: column; gap: 2px; padding: 8px 12px;
    background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow);
}

/* ---------------------------------------------------------------- data table */
.ui-table-wrap { display: flex; flex-direction: column; gap: 10px; min-width: 0; }
.ui-table-toolbar { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.ui-table-search {
    display: flex; align-items: center; gap: 8px; height: 38px; padding: 0 10px; flex: 1 1 220px; max-width: 360px;
    background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); color: var(--muted);
}
.ui-table-search:focus-within { border-color: var(--focus); box-shadow: 0 0 0 1px var(--focus); }
.ui-table-search input { flex: 1; min-width: 0; border: 0; outline: none; background: transparent; color: var(--ink); font: inherit; }
.ui-table-count { font-size: 13px; color: var(--muted); white-space: nowrap; }
.ui-table-scroll {
    overflow: auto; background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius-lg);
}
.ui-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.ui-table thead th {
    position: sticky; top: 0; z-index: 1; text-align: left; font-weight: 500; color: var(--muted); white-space: nowrap;
    background: var(--panel-alt); border-bottom: 1px solid var(--line); padding: 0 10px; height: 40px;
}
.ui-table td { padding: 8px 10px; border-bottom: 1px solid var(--line-soft); vertical-align: middle; height: 44px; }
.ui-table-dense td { height: 36px; padding: 4px 10px; }
.ui-table tbody tr:last-child td { border-bottom: 0; }
.ui-table tbody tr[tabindex] { cursor: pointer; }
.ui-table tbody tr[tabindex]:hover { background: var(--panel-alt); }
.ui-table tbody tr.is-selected { background: var(--accent-soft); }
.ui-table tbody tr:focus-visible { outline: 2px solid var(--focus); outline-offset: -2px; }
.ui-th-btn {
    display: inline-flex; align-items: center; gap: 4px; height: 40px; padding: 0; border: 0; background: transparent;
    color: inherit; font: inherit; cursor: pointer; white-space: nowrap;
}
.ui-th-sort { opacity: .55; }
th[aria-sort] .ui-th-sort { opacity: 1; color: var(--accent); }
.ui-cell-end { text-align: right; }
th.ui-cell-end .ui-th-btn { flex-direction: row-reverse; }
.ui-cell-center { text-align: center; }
.ui-cell-truncate { max-width: 340px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.ui-table-check, .ui-table-toggle { width: 40px; text-align: center; }
.ui-table-check input { width: 16px; height: 16px; accent-color: var(--accent); }
.ui-table-empty { text-align: center; color: var(--muted); padding: 32px 12px !important; height: auto !important; }
.ui-table-detail td { background: var(--panel-alt); height: auto; }
.ui-table-skeleton span { display: block; height: 12px; width: 60%; border-radius: 4px; background: var(--line-soft); }

/* ---------------------------------------------------------------- tree */
.ui-tree { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 1px; font-size: 13px; }
.ui-tree-item {
    display: flex; align-items: center; gap: 4px; min-height: 34px; padding: 0 8px 0 calc(6px + var(--depth, 0) * 18px);
    border-radius: var(--radius); cursor: pointer; outline: none;
}
.ui-tree-item:hover { background: var(--panel-alt); }
.ui-tree-item.is-selected { background: var(--accent-soft); color: var(--accent); font-weight: 600; }
.ui-tree-item:focus-visible { box-shadow: inset 0 0 0 2px var(--focus); }
.ui-tree-toggle { width: 20px; height: 20px; flex: none; display: inline-flex; align-items: center; justify-content: center; color: var(--muted); }
.ui-tree-label { flex: 1; min-width: 0; display: flex; align-items: center; gap: 8px; }

/* ---------------------------------------------------------------- dialog, sheet */
.ui-dialog {
    width: min(560px, calc(100vw - 32px)); max-height: calc(100vh - 48px); padding: 0; border: 1px solid var(--line);
    border-radius: 14px; background: var(--panel); color: var(--ink); box-shadow: var(--shadow);
}
.ui-dialog[open] { display: flex; flex-direction: column; }
.ui-dialog::backdrop { background: rgba(15, 42, 68, .4); }
.ui-dialog-wide { width: min(880px, calc(100vw - 32px)); }
.ui-sheet {
    margin: 0 0 0 auto; height: 100vh; max-height: 100vh; width: min(460px, 100vw); border-radius: 0; border-width: 0 0 0 1px;
}
.ui-dialog-head { display: flex; align-items: center; gap: 8px; padding: 16px 20px 8px; }
.ui-dialog-title { flex: 1; font-size: 18px; }
.ui-dialog-body { flex: 1; overflow: auto; padding: 8px 20px 20px; display: flex; flex-direction: column; gap: 16px; }
.ui-dialog-foot { display: flex; justify-content: flex-end; gap: 8px; padding: 12px 20px; border-top: 1px solid var(--line-soft); }

/* ---------------------------------------------------------------- tabs, segmented, select */
.ui-tabs { display: flex; flex-wrap: wrap; gap: 4px; border-bottom: 1px solid var(--line); }
.ui-tab {
    display: inline-flex; align-items: center; gap: 8px; height: 44px; padding: 0 14px; margin-bottom: -1px;
    border: 0; border-bottom: 2px solid transparent; background: transparent; color: var(--muted); font: inherit; cursor: pointer;
}
.ui-tab:hover { color: var(--ink); }
.ui-tab.is-active { color: var(--accent); border-bottom-color: var(--accent); font-weight: 600; }
.ui-tab-count { font-family: var(--mono); font-size: 12px; padding: 0 6px; border-radius: 999px; background: var(--panel-alt); color: var(--ink-2); }
.ui-segmented { display: inline-flex; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; background: var(--panel); }
.ui-segmented button {
    height: 38px; padding: 0 14px; border: 0; border-left: 1px solid var(--line-soft); background: transparent;
    color: var(--muted); font: inherit; cursor: pointer;
}
.ui-segmented button:first-child { border-left: 0; }
.ui-segmented button.is-active { background: var(--accent-soft); color: var(--accent); font-weight: 600; }
.ui-select-wrap { position: relative; display: flex; }
.ui-select {
    appearance: none; width: 100%; min-height: 40px; padding: 0 36px 0 12px; border: 1px solid var(--line-strong);
    border-radius: var(--radius); background: var(--panel); color: var(--ink); font: inherit;
}
.ui-select:focus { outline: none; border-color: var(--focus); box-shadow: 0 0 0 1px var(--focus); }
.ui-select-chevron { position: absolute; right: 12px; top: 50%; transform: translateY(-50%); pointer-events: none; color: var(--muted); }

/* ---------------------------------------------------------------- charts */
.ui-chart { margin: 0; display: flex; flex-direction: column; gap: 6px; min-width: 0; }
.ui-chart-head { display: flex; flex-wrap: wrap; align-items: baseline; gap: 6px 16px; }
.ui-chart-title { font-weight: 600; }
.ui-chart-legend { display: inline-flex; flex-wrap: wrap; gap: 14px; font-size: 12px; color: var(--muted); }
.ui-chart-key { display: inline-flex; align-items: center; gap: 6px; }
.ui-swatch { width: 10px; height: 10px; border-radius: 2px; display: inline-block; }
.ui-swatch.series-1, .ui-chart-bar.series-1, .ui-rank-bar.series-1 { background: var(--series-1); fill: var(--series-1); }
.ui-swatch.series-2, .ui-chart-bar.series-2 { background: var(--series-2); fill: var(--series-2); }
.ui-chart-svg { width: 100%; height: auto; display: block; overflow: visible; }
.ui-chart-grid { stroke: var(--line-soft); stroke-width: 1; vector-effect: non-scaling-stroke; }
.ui-chart-axis { fill: var(--muted); font-family: var(--mono); font-size: 11px; }
.ui-chart-hit { fill: transparent; }
.ui-chart-col:hover .ui-chart-hit { fill: var(--panel-alt); }
.ui-chart-line { fill: none; stroke: var(--series-1); stroke-width: 2; stroke-linejoin: round; vector-effect: non-scaling-stroke; }
.ui-chart-dot { fill: var(--series-1); stroke: var(--panel); stroke-width: 2; }
.ui-chart-limit { stroke: var(--danger); stroke-width: 1; stroke-dasharray: 4 4; vector-effect: non-scaling-stroke; }
.ui-chart-xlabels { display: flex; justify-content: space-between; gap: 4px; font-family: var(--mono); font-size: 11px; color: var(--muted); }
.ui-chart-xlabels .is-hidden { visibility: hidden; }
.ui-chart-empty { margin: 0; padding: 24px 0; text-align: center; color: var(--muted); }
.ui-meter { display: inline-flex; }
.ui-meter-track { fill: none; stroke: var(--line-soft); stroke-width: 14; }
.ui-meter-fill { fill: none; stroke: var(--series-1); stroke-width: 14; stroke-linecap: round; }
.ui-meter-fill.is-full { stroke: var(--warning); }
.ui-meter-value { fill: var(--ink); font-family: var(--mono); font-size: 24px; font-weight: 500; }
.ui-meter-of { fill: var(--muted); font-size: 12px; }
.ui-rank { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 10px; }
.ui-rank li { display: flex; flex-direction: column; gap: 4px; }
.ui-rank-row { display: flex; align-items: baseline; gap: 8px; font-size: 13px; }
.ui-rank-label { flex: 1; min-width: 0; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.ui-rank-note { font-size: 12px; color: var(--muted); }
.ui-rank-value { font-family: var(--mono); }
.ui-rank-track { height: 8px; border-radius: 4px; background: var(--line-soft); overflow: hidden; }
.ui-rank-bar { display: block; height: 100%; border-radius: 4px; }

/* ---------------------------------------------------------------- Revit year dots */
.ui-years { display: inline-flex; gap: 4px; }
.ui-year {
    width: 22px; height: 22px; border-radius: 50%; display: inline-flex; align-items: center; justify-content: center;
    font-family: var(--mono); font-size: 9px; border: 1.5px solid var(--line-strong); color: var(--muted);
}
.ui-year.is-on { background: var(--success); border-color: var(--success); color: #ffffff; }
:root[data-theme="dark"] .ui-year.is-on { color: #0b1520; }