/* =========================================================
   DOCUMENT UNDERSTANDING APP
   Page surface for /DocumentUnderstanding. All selectors are scoped under .du-app
   (the page root) so generic names cannot leak. Themed tokens only; traffic-light
   colours map to the shared feedback tokens.
   ========================================================= */

.du-page {
    height: 100%;
}

.du-app {
    height: 100%;
    min-height: 0;
    color: var(--ava-text);
}

.du-layout {
    display: grid;
    grid-template-columns: 248px minmax(0, 1fr) 340px;
    height: 100%;
    min-height: 0;
}

/* ---- Left sidebar ---- */

.du-sidebar {
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding: var(--ava-space-3);
    min-height: 0;
    overflow-y: auto;
    background: var(--ava-panel-2);
    border-right: 1px solid var(--ava-border-0);
}

.du-sidebar-title {
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--ava-text-muted);
    padding: 6px 10px 10px;
}

.du-nav-item {
    display: flex;
    align-items: center;
    gap: 10px;
    width: 100%;
    min-height: 44px;
    padding: 10px 12px;
    border: 1px solid transparent;
    border-radius: var(--ava-radius-sm);
    background: transparent;
    color: var(--ava-text-soft);
    font: inherit;
    font-weight: 650;
    text-align: left;
    cursor: pointer;
    transition: background var(--ava-dur-1) var(--ava-ease), color var(--ava-dur-1) var(--ava-ease), border-color var(--ava-dur-1) var(--ava-ease);
}

    .du-nav-item:hover {
        background: var(--ava-hover);
        color: var(--ava-text-1);
        border-color: transparent;
    }

    .du-nav-item.is-active {
        background: var(--ava-select);
        color: var(--ava-text-1);
        border-color: transparent;
        box-shadow: 0 0 0 1px var(--ava-select-ring) inset;
    }

.du-nav-icon {
    width: 20px;
    text-align: center;
    flex: 0 0 auto;
}

/* ---- Content column ---- */

.du-content {
    min-width: 0;
    min-height: 0;
    overflow-y: auto;
    padding: var(--ava-space-4);
}

.du-view {
    display: flex;
    flex-direction: column;
    gap: var(--ava-space-3);
    max-width: 1100px;
}

.du-view-title {
    margin: 0;
    font-size: 1.25rem;
    font-weight: 750;
}

.du-field {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.du-label {
    font-size: 0.85rem;
    font-weight: 650;
    color: var(--ava-text-soft);
}

.du-textarea {
    min-height: 90px;
    resize: vertical;
    font-family: var(--ava-font-sans);
}

.du-toolbar {
    display: flex;
    align-items: center;
    gap: var(--ava-space-3);
    flex-wrap: wrap;
}

.du-status-text {
    color: var(--ava-text-muted);
    font-size: 0.88rem;
}

.du-info {
    padding: 10px 14px;
    border-radius: var(--ava-radius-sm);
    background: color-mix(in srgb, var(--ava-accent) 10%, transparent);
    border: 1px solid var(--ava-border-1);
    color: var(--ava-text);
}

.du-error {
    padding: 10px 14px;
    border-radius: var(--ava-radius-sm);
    background: color-mix(in srgb, var(--ava-danger) 12%, transparent);
    border: 1px solid color-mix(in srgb, var(--ava-danger) 35%, transparent);
    color: var(--ava-text);
}

/* ---- Document pool ---- */

.du-pool {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.du-dropzone {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--ava-space-3);
    padding: var(--ava-space-3) var(--ava-space-4);
    border: 1px dashed var(--ava-border-2);
    border-radius: var(--ava-radius-md);
    background: var(--ava-panel-3);
    transition: background var(--ava-dur-1) var(--ava-ease), border-color var(--ava-dur-1) var(--ava-ease);
}

    .du-dropzone.is-dragover {
        background: color-mix(in srgb, var(--ava-accent) 12%, transparent);
        border-color: var(--ava-accent);
    }

.du-dropzone-text {
    color: var(--ava-text-soft);
}

.du-pool-help {
    font-size: 0.78rem;
    color: var(--ava-text-muted);
}

.du-pool-message {
    color: var(--ava-warning);
    font-size: 0.85rem;
}

.du-pool-empty,
.du-result-empty,
.du-preview-empty,
.du-compare-empty,
.du-ampel-detail-empty {
    color: var(--ava-text-muted);
    font-size: 0.9rem;
    padding: 8px 0;
}

.du-pool-list {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.du-pool-row {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 10px;
    border: 1px solid var(--ava-border-0);
    border-radius: var(--ava-radius-sm);
    background: var(--ava-panel-3);
    cursor: pointer;
    transition: background var(--ava-dur-1) var(--ava-ease), border-color var(--ava-dur-1) var(--ava-ease);
}

    .du-pool-row:hover {
        border-color: var(--ava-border-2);
    }

    .du-pool-row.is-selected {
        background: var(--ava-select);
        border-color: transparent;
        box-shadow: 0 0 0 1px var(--ava-select-ring) inset;
    }

.du-pool-name {
    flex: 1 1 auto;
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.du-pool-status {
    flex: 0 0 auto;
    font-size: 0.75rem;
    font-weight: 650;
}

.du-status--loaded { color: var(--ava-text-muted); }
.du-status--done { color: var(--ava-ok); }
.du-status--error { color: var(--ava-danger); }
.du-status--unsupported { color: var(--ava-warning); }

.du-pool-remove {
    flex: 0 0 auto;
}

.du-pool-actions {
    display: flex;
    justify-content: flex-end;
}

/* ---- Result display ---- */

.du-result {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.du-result-tabs {
    display: flex;
    gap: 6px;
}

.du-result-plain {
    margin: 0;
    padding: var(--ava-space-3);
    border-radius: var(--ava-radius-sm);
    background: var(--ava-panel-3);
    border: 1px solid var(--ava-border-0);
    white-space: pre-wrap;
    word-break: break-word;
    font-family: Consolas, "Courier New", monospace;
    font-size: 0.85rem;
}

/* Rendered Markdown. The app strips default element styling globally, so every markdown surface must
   restyle its own headings/lists/etc.; these selectors are scoped under .du-result-markup so they cannot
   leak. Mirrors the chat's .msg-markdown treatment. */
.du-result-markup {
    padding: var(--ava-space-3) var(--ava-space-4);
    border-radius: var(--ava-radius-sm);
    background: var(--ava-panel-3);
    border: 1px solid var(--ava-border-0);
    overflow-x: auto;
    white-space: normal;
}

    .du-result-markup > :first-child {
        margin-top: 0;
    }

    .du-result-markup > :last-child {
        margin-bottom: 0;
    }

    .du-result-markup h1,
    .du-result-markup h2,
    .du-result-markup h3,
    .du-result-markup h4,
    .du-result-markup h5,
    .du-result-markup h6 {
        color: var(--ava-text);
        font-weight: 750;
        line-height: 1.25;
        margin: 1em 0 0.5em;
    }

    .du-result-markup h1 { font-size: 1.5em; }
    .du-result-markup h2 { font-size: 1.3em; }
    .du-result-markup h3 { font-size: 1.15em; }

    .du-result-markup h4,
    .du-result-markup h5,
    .du-result-markup h6 { font-size: 1em; }

    .du-result-markup p { margin: 0 0 0.7em; }

    .du-result-markup ul,
    .du-result-markup ol {
        margin: 0 0 0.7em;
        padding-left: 1.4em;
        list-style-position: outside;
    }

    .du-result-markup ul { list-style-type: disc; }
    .du-result-markup ol { list-style-type: decimal; }
    .du-result-markup li { margin: 0.2em 0; }

        .du-result-markup li > ul,
        .du-result-markup li > ol { margin-bottom: 0; }

    .du-result-markup strong { font-weight: 750; }
    .du-result-markup em { font-style: italic; }

    .du-result-markup blockquote {
        margin: 0 0 0.7em;
        padding: 0.3em 0.9em;
        border-left: 3px solid var(--ava-border-2);
        background: color-mix(in srgb, var(--ava-text) 4%, transparent);
        color: var(--ava-text-soft);
    }

        .du-result-markup blockquote > :last-child { margin-bottom: 0; }

    .du-result-markup code {
        font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
        font-size: 0.9em;
        background: color-mix(in srgb, var(--ava-text) 8%, transparent);
        padding: 0.1em 0.35em;
        border-radius: 4px;
    }

    .du-result-markup pre {
        margin: 0 0 0.7em;
        padding: 0.8em 1em;
        max-width: 100%;
        overflow-x: auto;
        background: var(--ava-bg-3);
        border: 1px solid var(--ava-border-0);
        border-radius: var(--ava-radius-sm);
    }

        .du-result-markup pre code {
            background: transparent;
            padding: 0;
            border-radius: 0;
            font-size: 0.86em;
        }

    .du-result-markup table {
        display: block;
        width: max-content;
        max-width: 100%;
        overflow-x: auto;
        border-collapse: collapse;
        margin: 0 0 0.7em;
        font-size: 0.95em;
    }

    .du-result-markup th,
    .du-result-markup td {
        border: 1px solid var(--ava-border-1);
        padding: 0.4em 0.7em;
        text-align: left;
    }

    .du-result-markup th {
        background: color-mix(in srgb, var(--ava-text) 6%, transparent);
        font-weight: 700;
    }

    .du-result-markup hr {
        border: 0;
        border-top: 1px solid var(--ava-border-1);
        margin: 1em 0;
    }

    .du-result-markup a { color: var(--ava-accent-2); }

/* ---- Compare (two-slot) ---- */

.du-slots {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: var(--ava-space-3);
}

.du-slot-row {
    display: flex;
    gap: 8px;
    align-items: center;
}

    .du-slot-row .ava-input {
        flex: 1 1 auto;
        min-width: 0;
    }

.du-compare-summary {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: var(--ava-space-3);
}

.du-compare-col {
    padding: var(--ava-space-3);
    border-radius: var(--ava-radius-sm);
    background: var(--ava-panel-3);
    border: 1px solid var(--ava-border-0);
}

.du-compare-head {
    margin: 0 0 8px;
    font-size: 0.95rem;
}

.du-match {
    padding: 4px 0;
    border-left: 3px solid var(--ava-ok);
    padding-left: 10px;
    margin: 4px 0;
}

.du-diff {
    padding: 4px 0 4px 10px;
    margin: 4px 0;
    border-left: 3px solid var(--ava-warning);
}

    .du-diff--major { border-left-color: var(--ava-danger); }
    .du-diff--minor { border-left-color: var(--ava-warning); }

/* ---- Ampel (traffic-light) ---- */

.du-ampel--green { color: var(--ava-ok); }
.du-ampel--yellow { color: var(--ava-warning); }
.du-ampel--red { color: var(--ava-danger); }
.du-ampel--unknown { color: var(--ava-text-muted); }

.du-ampel-layout {
    display: grid;
    grid-template-columns: minmax(220px, 280px) minmax(0, 1fr);
    gap: var(--ava-space-3);
}

.du-ampel-list {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.du-ampel-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 10px;
    border: 1px solid var(--ava-border-0);
    border-radius: var(--ava-radius-sm);
    background: var(--ava-panel-3);
    cursor: pointer;
}

    .du-ampel-item.is-selected {
        border-color: transparent;
        background: var(--ava-select);
        box-shadow: 0 0 0 1px var(--ava-select-ring) inset;
    }

.du-ampel-dot {
    width: 12px;
    height: 12px;
    border-radius: 999px;
    flex: 0 0 auto;
    background: currentColor;
}

.du-ampel-name {
    flex: 1 1 auto;
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    color: var(--ava-text);
}

.du-ampel-label {
    flex: 0 0 auto;
    font-size: 0.78rem;
    font-weight: 650;
}

.du-ampel-detail {
    display: flex;
    flex-direction: column;
    gap: 10px;
    min-width: 0;
}

.du-ampel-detail-head {
    font-size: 1.05rem;
    font-weight: 700;
}

.du-ampel-reasoning {
    font-style: italic;
    color: var(--ava-text-soft);
}

.du-ampel-rulegroup {
    border: 1px solid var(--ava-border-0);
    border-radius: var(--ava-radius-sm);
    padding: 10px 12px;
    background: var(--ava-panel-3);
}

.du-ampel-rulegroup-head {
    font-weight: 700;
    margin-bottom: 6px;
}

.du-ampel-rule {
    padding: 3px 0;
    color: var(--ava-text-soft);
}

/* ---- Ampel comparison ---- */

.du-ampelcompare-head {
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding: var(--ava-space-3);
    border-radius: var(--ava-radius-sm);
    background: var(--ava-panel-3);
    border: 1px solid var(--ava-border-0);
}

.du-ampel-overall {
    font-weight: 700;
}

.du-ampelcompare-categories {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.du-ampelcompare-category {
    border: 1px solid var(--ava-border-0);
    border-radius: var(--ava-radius-sm);
    padding: 10px 12px;
    background: var(--ava-panel-3);
}

.du-ampelcompare-category-head {
    font-weight: 700;
    margin-bottom: 6px;
}

.du-ampelcompare-detail {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    padding: 3px 0;
    color: var(--ava-text-soft);
}

.du-ampelcompare-aspect {
    font-weight: 650;
    color: var(--ava-text);
}

.du-ampelcompare-assessment {
    color: var(--ava-text-muted);
}

/* ---- Settings ---- */

.du-settings-section {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding-bottom: var(--ava-space-3);
    border-bottom: 1px solid var(--ava-border-0);
}

.du-settings-head {
    margin: 0;
    font-size: 1rem;
    font-weight: 700;
}

.du-settings-hint {
    margin: 0;
    color: var(--ava-text-muted);
    font-size: 0.85rem;
}

.du-radio {
    display: flex;
    align-items: center;
    gap: 8px;
}

/* ---- Preview pane ---- */

.du-preview-pane {
    min-height: 0;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    border-left: 1px solid var(--ava-border-0);
    background: var(--ava-panel-2);
}

.du-preview {
    display: flex;
    flex-direction: column;
    min-height: 0;
    height: 100%;
    padding: var(--ava-space-3);
    gap: 8px;
}

.du-preview-head {
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--ava-text-muted);
}

.du-preview-name {
    font-weight: 650;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.du-preview-body {
    flex: 1 1 auto;
    min-height: 0;
    overflow: auto;
    border: 1px solid var(--ava-border-0);
    border-radius: var(--ava-radius-sm);
    background: var(--ava-bg-3);
}

.du-preview-img {
    max-width: 100%;
    display: block;
}

.du-preview-frame {
    width: 100%;
    height: 100%;
    min-height: 420px;
    border: 0;
}

.du-preview-text {
    margin: 0;
    padding: var(--ava-space-3);
    white-space: pre-wrap;
    word-break: break-word;
    font-family: Consolas, "Courier New", monospace;
    font-size: 0.82rem;
}

.du-preview-fallback {
    padding: var(--ava-space-3);
    display: flex;
    flex-direction: column;
    gap: 10px;
    color: var(--ava-text-soft);
}

/* ---- Scrollbars ---- */
/* The thin teal scrollbar shared with the connector lists and settings panels, applied to every
   scrollable surface in the app so the Document Understanding view matches the rest of the UI. */

.du-sidebar,
.du-content,
.du-preview-body,
.du-layout,
.du-result-markup,
.du-result-markup pre,
.du-result-markup table {
    scrollbar-width: thin;
    scrollbar-color: var(--ava-line-strong) transparent;
}

    .du-sidebar::-webkit-scrollbar,
    .du-content::-webkit-scrollbar,
    .du-preview-body::-webkit-scrollbar,
    .du-layout::-webkit-scrollbar,
    .du-result-markup::-webkit-scrollbar,
    .du-result-markup pre::-webkit-scrollbar,
    .du-result-markup table::-webkit-scrollbar {
        width: 10px;
        height: 10px;
    }

    .du-sidebar::-webkit-scrollbar-track,
    .du-content::-webkit-scrollbar-track,
    .du-preview-body::-webkit-scrollbar-track,
    .du-layout::-webkit-scrollbar-track,
    .du-result-markup::-webkit-scrollbar-track,
    .du-result-markup pre::-webkit-scrollbar-track,
    .du-result-markup table::-webkit-scrollbar-track {
        background: transparent;
        border-radius: 999px;
    }

    .du-sidebar::-webkit-scrollbar-thumb,
    .du-content::-webkit-scrollbar-thumb,
    .du-preview-body::-webkit-scrollbar-thumb,
    .du-layout::-webkit-scrollbar-thumb,
    .du-result-markup::-webkit-scrollbar-thumb,
    .du-result-markup pre::-webkit-scrollbar-thumb,
    .du-result-markup table::-webkit-scrollbar-thumb {
        background: var(--ava-line-strong);
        border-radius: 999px;
    }

        .du-sidebar::-webkit-scrollbar-thumb:hover,
        .du-content::-webkit-scrollbar-thumb:hover,
        .du-preview-body::-webkit-scrollbar-thumb:hover,
        .du-layout::-webkit-scrollbar-thumb:hover,
        .du-result-markup::-webkit-scrollbar-thumb:hover,
        .du-result-markup pre::-webkit-scrollbar-thumb:hover,
        .du-result-markup table::-webkit-scrollbar-thumb:hover {
            background: rgba(159,182,190,0.34);
        }

/* ---- Responsive ---- */

@media (max-width: 1100px) {
    .du-layout {
        grid-template-columns: 220px minmax(0, 1fr);
    }

    .du-preview-pane {
        display: none;
    }
}

@media (max-width: 760px) {
    .du-layout {
        grid-template-columns: 1fr;
        grid-auto-rows: auto;
        overflow-y: auto;
    }

    .du-sidebar {
        flex-direction: row;
        flex-wrap: wrap;
        border-right: none;
        border-bottom: 1px solid var(--ava-border-0);
    }

    .du-ampel-layout {
        grid-template-columns: 1fr;
    }
}