:root {
    --bg: #fbfaf7;
    --panel: #ffffff;
    --text: #222;
    --muted: #6b6b6b;
    --border: #ddd8cf;
    --accent: #9c4a1a;
    --accent-text: #fff;
    --row-alt: #f4f1ea;
    --good: #2f7a3a;
    --bad: #b3261e;
}

:root[data-theme=arctic] {
    --bg: #f2f7fa;
    --panel: #ffffff;
    --text: #1a2a33;
    --muted: #5d7381;
    --border: #cddde7;
    --accent: #1d6a94;
    --accent-text: #fff;
    --row-alt: #e8f2f8;
    --good: #2a7a5f;
    --bad: #b3261e;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #1b1a18;
        --panel: #24221f;
        --text: #e9e6e0;
        --muted: #a39e95;
        --border: #3d3a35;
        --accent: #e0894f;
        --accent-text: #1b1a18;
        --row-alt: #2b2925;
        --good: #7fc58a;
        --bad: #f08a80;
    }

    :root[data-theme=arctic] {
        --bg: #11191f;
        --panel: #17222a;
        --text: #e1edf3;
        --muted: #91a8b5;
        --border: #2b3d49;
        --accent: #7cc5e8;
        --accent-text: #0f171c;
        --row-alt: #1c2a33;
        --good: #7fcfb0;
        --bad: #f08a80;
    }
}

* { box-sizing: border-box; }

body {
    margin: 0;
    padding: 0 16px 16px;
    font: 14px/1.4 system-ui, sans-serif;
    background: var(--bg);
    color: var(--text);
    display: flex;
    flex-direction: column;
    height: 100vh;
}

a { color: var(--accent); }
input[type=checkbox], input[type=radio] { accent-color: var(--accent); }
h1 { font-size: 1.4em; margin: 12px 0 4px; }
h2 { font-size: 1.1em; margin: 0; }
header p { margin: 4px 0; }
.title-row { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: 4px 12px; }
.meta { color: var(--muted); }
.count { color: var(--muted); font-weight: normal; }

main {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    flex: 3 1 0;
    min-height: 0;
    margin-top: 8px;
}

.pane {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 6px;
    display: flex;
    flex-direction: column;
    min-height: 0;
    min-width: 0;
}

.pane-head { padding: 8px 10px; border-bottom: 1px solid var(--border); }
.pane-body { overflow-y: auto; padding: 0 10px 10px; flex: 1; }

#results-pane { flex: 2 1 0; margin-top: 12px; min-height: 0; }

.toolbar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 6px 10px;
    margin-top: 6px;
}
.toolbar:first-child { margin-top: 0; }
.spacer { flex: 1; }

button, .button {
    font: inherit;
    padding: 3px 9px;
    border: 1px solid var(--border);
    border-radius: 4px;
    background: var(--row-alt);
    color: var(--text);
    cursor: pointer;
}
button:hover, .button:hover { border-color: var(--accent); }
button.primary {
    background: var(--accent);
    color: var(--accent-text);
    border-color: var(--accent);
    font-weight: bold;
}
button:disabled { opacity: .6; cursor: default; }

input[type=search] { flex: 1; min-width: 140px; }
input[type=search], input[type=number], select {
    font: inherit;
    padding: 3px 6px;
    border: 1px solid var(--border);
    border-radius: 4px;
    background: var(--bg);
    color: var(--text);
}
input[type=number] { width: 5em; }
input.qty { width: 4em; }
input.qty.nonzero { border-color: var(--accent); font-weight: bold; }

#tabs button.active { background: var(--accent); color: var(--accent-text); border-color: var(--accent); }

details { margin-top: 8px; }
summary {
    cursor: pointer;
    font-weight: 600;
    padding: 4px 0;
    position: sticky;
    top: 0;
    background: var(--panel);
}

table { border-collapse: collapse; width: 100%; }
th { text-align: left; color: var(--muted); font-weight: 600; }
td, th { padding: 2px 6px; vertical-align: middle; }
tbody tr:nth-child(even) { background: var(--row-alt); }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
td.code { color: var(--muted); font-size: .85em; white-space: nowrap; }
td.actions { white-space: nowrap; }
td.actions button { padding: 0 6px; }
tr.omitted td:not(.actions) { text-decoration: line-through; color: var(--muted); }
.tag { font-size: .75em; padding: 0 4px; border: 1px solid var(--border); border-radius: 3px; color: var(--muted); }

#status.error { color: var(--bad); }
#status.ok { color: var(--good); }
.total { font-size: 1.15em; font-weight: bold; margin: 8px 0; }
button.back { margin-top: 8px; }

.help {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 1.25em;
    height: 1.25em;
    border-radius: 50%;
    border: 1px solid var(--muted);
    color: var(--muted);
    font-size: .75rem;
    font-weight: bold;
    cursor: help;
    vertical-align: middle;
}
label + .help { margin-left: -4px; margin-right: 8px; }
.help:hover, .help:focus { border-color: var(--accent); color: var(--accent); outline: none; }

#tooltip {
    position: fixed;
    z-index: 10;
    max-width: 320px;
    padding: 6px 9px;
    border-radius: 5px;
    background: var(--text);
    color: var(--bg);
    font-size: 13px;
    font-weight: normal;
    line-height: 1.35;
    pointer-events: none;
    box-shadow: 0 2px 8px rgba(0, 0, 0, .25);
}
#tooltip[hidden] { display: none; }

.set-view {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 340px);
    gap: 16px;
    align-items: start;
}
.set-picture { margin: 8px 0 0; position: sticky; top: 8px; }
.set-picture img {
    display: block;
    max-width: 100%;
    max-height: min(340px, 28vh);
    border: 1px solid var(--border);
    border-radius: 6px;
    cursor: zoom-in;
}
.set-picture figcaption { margin-top: 4px; font-size: .85em; color: var(--muted); }
.set-picture.none {
    padding: 24px 12px;
    border: 1px dashed var(--border);
    border-radius: 6px;
    color: var(--muted);
    text-align: center;
}

dialog#lightbox {
    max-width: calc(100vw - 32px);
    max-height: calc(100vh - 32px);
    padding: 8px;
    border: none;
    border-radius: 8px;
    background: var(--panel);
    color: var(--text);
    cursor: zoom-out;
}
dialog#lightbox::backdrop { background: rgba(0, 0, 0, .8); }
dialog#lightbox img {
    display: block;
    max-width: calc(100vw - 48px);
    max-height: calc(100vh - 90px);
    margin: 0 auto;
}
dialog#lightbox .caption { text-align: center; padding: 6px 0 0; font-weight: 600; }
dialog#lightbox .close { position: absolute; top: 12px; right: 12px; }

dialog#help {
    width: min(760px, calc(100vw - 32px));
    max-height: calc(100vh - 48px);
    padding: 0;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--panel);
    color: var(--text);
    box-shadow: 0 8px 32px rgba(0, 0, 0, .35);
}
dialog#help[open] { display: flex; flex-direction: column; }
dialog#help::backdrop { background: rgba(0, 0, 0, .45); }
.help-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 12px 16px;
    border-bottom: 1px solid var(--border);
}
.help-body { overflow-y: auto; padding: 4px 16px 16px; line-height: 1.5; }
.help-body h3 { font-size: 1em; margin: 18px 0 4px; color: var(--accent); }
.help-body p, .help-body ul, .help-body ol, .help-body dl { margin: 6px 0; }
.help-body li { margin: 3px 0; }
.help-body dt { font-weight: 600; margin-top: 8px; }
.help-body dd { margin: 2px 0 0 16px; }
.help-body table.legend { width: auto; margin: 4px 0 8px; }
.help-body table.legend td.code { font-family: ui-monospace, monospace; font-size: .9em; }
.lost { color: var(--muted); font-size: .9em; }

@media (max-width: 800px) {
    body { height: auto; display: block; }
    main { grid-template-columns: 1fr; }
    main, #results-pane { flex: none; }
    .pane-body { max-height: 60vh; }
    .set-view { grid-template-columns: minmax(0, 1fr); }
    .set-view .set-picture { order: -1; position: static; }
}
.title-row .toolbar { margin-top: 0; }