/* ---------- Folder list ---------- */

/* Container fills its grid cell vertically and turns into a flex column
   so the head row pins to the top while the <ul> below scrolls. */
.folder-list-container {
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-lg);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    min-height: 0;
}

/* One source of truth for the column layout — every row (head + body)
   uses this so header text aligns with cell content. Switch columns are
   locked to a fixed width to keep alignment predictable. */
:root {
    /* name · files · indexed · status · search · share */
    --tree-cols: 1fr 56px 64px 100px 56px 56px;
    --tree-gap: 10px;
    --tree-pad-x: 16px;
}
/* Depth indentation lives as padding-left on the .name-cell (see main.js).
   That keeps chevron + glyph + label moving together as a unit while the
   metadata columns to the right stay aligned with the column header. */
.tree-row .name-cell {
    display: flex;
    align-items: center;
    gap: 6px;
    overflow: hidden;
    min-width: 0;
}

.tree-head {
    display: grid;
    grid-template-columns: var(--tree-cols);
    gap: var(--tree-gap);
    padding: 8px var(--tree-pad-x);
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.4px;
    text-transform: uppercase;
    color: var(--color-text-secondary);
    flex-shrink: 0;
    /* The ul is a separate scroll container, so this row doesn't need
       position:sticky — but keep a subtle shadow when content scrolls
       under it for visual continuity. */
    position: relative;
    z-index: 1;
}
.tree-head .num { text-align: right; }
.tree-head .center { text-align: center; }

.tree {
    list-style: none;
    margin: 0;
    padding: 0;
    flex: 1;
    min-height: 0;
    overflow-y: auto;
    /* Hide horizontal scroll-bars on tight viewports — the toggle column
       widths are fixed, so there's no horizontal overflow to expose. */
    overflow-x: hidden;
}
.tree-row {
    position: relative;
    display: grid;
    grid-template-columns: var(--tree-cols);
    align-items: center;
    gap: var(--tree-gap);
    padding: 5px var(--tree-pad-x);
    border-bottom: 1px solid var(--color-border-light);
    cursor: pointer;
    transition: background var(--t);
    user-select: none;
}
/* Read-only shared folders (someone else owns them) get a left-edge accent
   so they stand out from your own. The accent persists even when selected. */
.tree-row.folder-root.shared-readonly {
    border-left: 3px solid var(--color-accent);
    padding-left: 13px;
    background: linear-gradient(
        to right,
        color-mix(in srgb, var(--color-accent) 6%, transparent),
        transparent 40%
    );
}
.tree-row.folder-root.shared-readonly.selected {
    background: var(--color-accent);
}

/* "Sign in with Google" button — matches Google's Identity Branding
   guidelines (https://developers.google.com/identity/branding-guidelines):
   white surface, 1px #dadce0 border, four-colour G mark, Roboto-style
   label. We render a real <a>, not an iframe widget, because we just need
   to send the user to /api/auth/login/google — no client-side SDK. */
.gsi-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-top: 16px;
    padding: 0 16px;
    height: 40px;
    min-width: 220px;
    background: #ffffff;
    border: 1px solid #dadce0;
    border-radius: 4px;
    color: #1f1f1f;
    font-family: "Google Sans", "Roboto", -apple-system, BlinkMacSystemFont,
        "Segoe UI", Helvetica, Arial, sans-serif;
    font-size: 14px;
    font-weight: 500;
    letter-spacing: 0.25px;
    text-decoration: none;
    cursor: pointer;
    transition: box-shadow 120ms ease, background 120ms ease;
    /* Subtle Material-style elevation that lifts on hover. */
    box-shadow: 0 1px 2px rgba(60, 64, 67, 0.06),
                0 1px 3px 1px rgba(60, 64, 67, 0.04);
}
.gsi-button:hover {
    background: #f8faff;
    box-shadow: 0 1px 2px rgba(60, 64, 67, 0.10),
                0 2px 6px 2px rgba(60, 64, 67, 0.08);
}
.gsi-button:active {
    background: #f1f3f4;
    box-shadow: 0 1px 1px rgba(60, 64, 67, 0.10);
}
.gsi-button:focus-visible {
    outline: 2px solid #4285F4;
    outline-offset: 2px;
}
.gsi-button-icon {
    display: inline-flex;
    align-items: center;
    flex-shrink: 0;
    width: 18px;
    height: 18px;
}
.gsi-button-label {
    line-height: 1;
}
/* Dark theme: invert to the Google "filled blue" variant — same brand
   guidelines, white G on a #131314 surface with reduced opacity. */
[data-theme="dark"] .gsi-button {
    background: #131314;
    border-color: #8e918f;
    color: #e3e3e3;
}
[data-theme="dark"] .gsi-button:hover {
    background: #1a1b1d;
    border-color: #ffffff;
}
[data-theme="dark"] .gsi-button:active {
    background: #232427;
}

/* Segmented tabs (e.g. Google Drive auth-mode picker). Two-button row
   styled like an iOS segmented control: the active segment gets the
   accent fill, hover dims the inactive side. Picked over a select-box
   because the choices change which fields render below — visible options
   make that consequence obvious without a dropdown click. */
.seg-tabs {
    display: inline-flex;
    margin: 6px 0 12px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-bg);
    padding: 2px;
    gap: 2px;
}
.seg-tab {
    padding: 6px 14px;
    font: inherit;
    font-size: 13px;
    font-weight: 500;
    color: var(--color-text-secondary);
    background: transparent;
    border: none;
    border-radius: calc(var(--radius-md) - 2px);
    cursor: pointer;
    transition: background var(--t), color var(--t);
}
.seg-tab:hover:not(.active) {
    background: var(--color-bg-hover);
    color: var(--color-text-primary);
}
.seg-tab.active {
    background: var(--color-accent);
    color: #fff;
}

/* Compact iOS-style toggle switch used for the per-folder Active and Share
   flags. Built around an unstyled checkbox so screen readers and keyboard
   navigation work for free. */
.folder-switch {
    position: relative;
    display: inline-block;
    width: 32px;
    height: 18px;
    flex-shrink: 0;
}
.folder-switch input {
    position: absolute;
    opacity: 0;
    width: 100%;
    height: 100%;
    margin: 0;
    cursor: pointer;
}
.folder-switch .track {
    position: absolute;
    inset: 0;
    background: var(--color-text-tertiary);
    border-radius: 9px;
    transition: background var(--t);
    pointer-events: none;
}
.folder-switch .track::before {
    content: "";
    position: absolute;
    left: 2px;
    top: 2px;
    width: 14px;
    height: 14px;
    background: #fff;
    border-radius: 50%;
    transition: transform 120ms ease;
}
.folder-switch input:checked + .track {
    background: var(--color-accent);
}
.folder-switch input:checked + .track::before {
    transform: translateX(14px);
}
.folder-switch input:disabled + .track {
    opacity: 0.4;
    cursor: not-allowed;
}
.folder-switch input:disabled {
    cursor: not-allowed;
}
.tree-row:last-child { border-bottom: none; }
.tree-row:hover { background: var(--color-bg-hover); }
.tree-delete-btn {
    position: absolute;
    right: var(--tree-pad-x);
    top: 50%;
    transform: translateY(-50%);
    padding: 0 5px;
    border: none;
    background: none;
    color: var(--color-text-secondary);
    font-size: 16px;
    line-height: 1;
    cursor: pointer;
    border-radius: 3px;
    opacity: 0;
    transition: opacity .1s;
}
.tree-row:hover .tree-delete-btn { opacity: .5; }
.tree-delete-btn:hover { opacity: 1 !important; color: var(--color-danger, #c0392b); background: var(--color-bg-hover); }
.tree-row.selected,
.tree-row.selected:hover { background: var(--color-accent); color: #fff; }
.tree-row.selected .num,
.tree-row.selected .label,
.tree-row.selected .chevron { color: #fff; }
.tree-row.selected .glyph { color: #fff; }

/* Legacy indent span — unused since depth moved to label padding-left.
   Kept hidden in case any cached JS still emits it. */
.tree-row .indent { display: none; }
.tree-row .chevron {
    width: 14px;
    text-align: center;
    color: var(--color-text-secondary);
    font-size: 10px;
    transition: transform 120ms ease;
}
.tree-row .chevron.open { transform: rotate(90deg); }
.tree-row .chevron.leaf { visibility: hidden; }
.tree-row .label {
    display: flex;
    align-items: center;
    gap: 6px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    min-width: 0;
    font-size: 13px;
}
.tree-row .label .glyph {
    flex-shrink: 0;
    width: 16px;
    height: 16px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    line-height: 0;
    position: relative;  /* anchor for the .source-lock overlay */
}
/* Private-source lock badge layered over the bottom-right corner
   of the glyph. ~9 px so it's a clear cue without obscuring the
   underlying brand mark; backdrop disc keeps it legible whether
   the underlying icon is dark or light. */
.tree-row .label .glyph .source-lock {
    position: absolute;
    right: -3px;
    bottom: -3px;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--color-bg-elevated);
    padding: 1px;
    box-shadow: 0 0 0 1px var(--color-border);
}
.tree-row .label .glyph .source-lock[hidden] { display: none; }
/* Vendored SVGs carry their own colour. ``<img>`` keeps the raster
   pixel-perfect on retina without the per-render decode overhead a
   plain inline-SVG would pay. */
.tree-row .label .glyph .icon-img {
    width: 16px;
    height: 16px;
    display: block;
    /* Selection background is dark — keep the icon legible by adding
       a tiny shadow under the SVG so light strokes don't disappear
       on the accent fill. */
    image-rendering: -webkit-optimize-contrast;
}
.tree-row.file .label { color: var(--color-text-secondary); }

/* Artifact summary rows (one per type under expanded files) */
.tree-row.artifact {
    grid-template-columns: 1fr;
}
.tree-row.artifact .label.artifact-label {
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--color-text-secondary);
    font-size: 12px;
    overflow: hidden;
}
.artifact-summary-icon { flex-shrink: 0; font-size: 13px; }
.artifact-summary-text {
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
}
.tree-row.artifact.selected .label.artifact-label { color: #fff; }

/* --- Image gallery (preview pane) --- */
.artifact-gallery {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    padding: 16px;
}
.artifact-gallery-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    cursor: default;
}
.artifact-gallery-img {
    max-width: 200px;
    max-height: 200px;
    object-fit: contain;
    border-radius: 4px;
    border: 1px solid var(--color-border);
    background: var(--color-bg-secondary);
}
.artifact-gallery-caption {
    font-size: 11px;
    color: var(--color-text-secondary);
}

/* --- Layout view (preview pane) --- */
.layout-page-section {
    margin-bottom: 20px;
}
.layout-page-header {
    font-size: 11px;
    font-weight: 600;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    padding: 6px 16px 4px;
    position: sticky;
    top: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    z-index: 1;
}
.layout-block {
    display: flex;
    gap: 8px;
    align-items: baseline;
    padding: 3px 16px;
    font-size: 13px;
    line-height: 1.4;
    border-bottom: 1px solid var(--color-border-subtle, var(--color-border));
}
.layout-block:hover { background: var(--color-bg-hover, rgba(255,255,255,0.04)); }
.layout-block-icon {
    flex-shrink: 0;
    width: 16px;
    text-align: center;
    color: var(--color-text-secondary);
    font-size: 11px;
}
.layout-block-text {
    color: var(--color-text);
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
}
.layout-block-title .layout-block-text { font-weight: 600; }
.layout-block-table .layout-block-text { font-style: italic; color: var(--color-text-secondary); }
.layout-block-page_number .layout-block-text,
.layout-block-page_footnote .layout-block-text,
.layout-block-header .layout-block-text { color: var(--color-text-secondary); font-size: 11px; }

.tree-row .num {
    text-align: right;
    font-size: 12px;
    color: var(--color-text-secondary);
}

/* Status pill: smaller and quieter inside tree rows. */
.tree-row .status-tag {
    min-width: auto;
    font-size: 10px;
    padding: 1px 8px;
    text-transform: lowercase;
}
.tree-row.selected .status-tag {
    background: rgba(255, 255, 255, 0.25);
    color: #fff;
}