/**
 * The unified document viewer.
 *
 * The surfaces: the header (title block + square icon buttons), the
 * scroll body, the prose surface for HTML documents, the PDF canvas
 * pages, the slide cards, and the state screens (loading, error,
 * empty).
 *
 * Everything is square-cornered, hairline-bordered and copper-accented
 * to match the rest of QUAD.
 */

/* ── The shell ─────────────────────────────────────────────── */

.doc-viewer-shell {
    display: flex;
    flex-direction: column;
    height: 100%;
    min-height: 0;
    background: var(--bg);
}

.doc-viewer-body {
    flex: 1;
    min-height: 0;
    display: flex;
}

.doc-viewer-scroll {
    flex: 1;
    min-height: 0;
    overflow-y: auto;
    overflow-x: hidden;
    background: var(--surface, rgba(255, 255, 255, 0.02));
    scroll-behavior: smooth;
    display: flex;
    flex-direction: column;
}

.doc-viewer-scroll.is-pdf {
    background: var(--bg);
}

.doc-viewer-content {
    flex: 1;
    min-width: 0;
    padding: 32px 48px;
}

.doc-viewer-content:has(.doc-idoc-frame) {
    padding: 0;
    background: var(--bg);
}

.doc-viewer-content:has(.doc-pdf-pages) {
    padding: 24px 32px;
    display: flex;
    align-items: flex-start;
    gap: 20px;
}

/* ── The header title block ────────────────────────────────── */

.viewer-header-name {
    font-weight: 700;
    font-size: 14px;
    color: var(--text, var(--c-ink));
    line-height: 1.25;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.viewer-header-sub {
    font-size: 11px;
    color: var(--text-dim, var(--c-ink-dim));
    margin-top: 4px;
    font-family: 'Space Grotesk', 'Geist', ui-sans-serif, system-ui, sans-serif;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* ── The prose surface (HTML documents) ────────────────────── */

.doc-prose {
    max-width: 900px;
    margin: 0 auto;
    width: 100%;
    color: var(--text, var(--c-ink));
    font-size: 15px;
    line-height: 1.65;
}

.doc-prose h1,
.doc-prose h2,
.doc-prose h3,
.doc-prose h4 {
    font-family: 'Space Grotesk', 'Geist', ui-sans-serif, system-ui, sans-serif;
    letter-spacing: -0.01em;
    color: var(--text, var(--c-ink));
    margin: 1.6em 0 0.6em;
    line-height: 1.25;
}

.doc-prose h1 { font-size: 1.9em; }
.doc-prose h2 { font-size: 1.45em; }
.doc-prose h3 { font-size: 1.2em; }
.doc-prose h4 { font-size: 1.05em; }

.doc-prose > :first-child { margin-top: 0; }

.doc-prose p { margin: 0 0 1em; }

.doc-prose a {
    color: var(--c-accent, #cc9050);
    text-decoration: underline;
    text-underline-offset: 3px;
}

.doc-prose ul,
.doc-prose ol { margin: 0 0 1em; padding-left: 1.5em; }

.doc-prose li { margin-bottom: 0.4em; }

.doc-prose blockquote {
    margin: 1.2em 0;
    padding: 2px 0 2px 18px;
    border-left: 2px solid var(--c-accent, #cc9050);
    color: var(--text-dim, var(--c-ink-dim));
}

.doc-prose table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.2em 0;
    font-size: 0.94em;
}

.doc-prose th,
.doc-prose td {
    border: 1px solid var(--border-2, rgba(255, 255, 255, 0.08));
    padding: 8px 11px;
    text-align: left;
}

.doc-prose th {
    background: rgba(255, 255, 255, 0.03);
    font-weight: 600;
}

.doc-prose code {
    font-family: 'Cascadia Code', 'Fira Code', 'JetBrains Mono', ui-monospace, monospace;
    font-size: 0.9em;
    background: rgba(255, 255, 255, 0.05);
    padding: 1px 5px;
}

.doc-prose pre {
    background: rgba(0, 0, 0, 0.4);
    border: 1px solid var(--border-2, rgba(255, 255, 255, 0.08));
    padding: 14px 16px;
    overflow-x: auto;
    margin: 1.2em 0;
}

.doc-prose pre code {
    background: none;
    padding: 0;
    font-size: 0.86em;
    line-height: 1.55;
}

.doc-prose img {
    max-width: 100%;
    height: auto;
}

.doc-viewer-note {
    max-width: 900px;
    margin: 0 auto 18px;
    padding: 8px 12px;
    font-size: 11px;
    color: var(--text-dim, var(--c-ink-dim));
    border: 1px solid var(--border-2, rgba(255, 255, 255, 0.08));
    border-left: 2px solid var(--c-accent, #cc9050);
    background: rgba(204, 144, 80, 0.05);
}

/* ── Plain text and code ───────────────────────────────────── */

.doc-code {
    margin: 0 auto;
    max-width: 960px;
    width: 100%;
    font-family: 'Cascadia Code', 'Fira Code', 'JetBrains Mono', ui-monospace, monospace;
    font-size: 12.5px;
    line-height: 1.6;
    white-space: pre-wrap;
    word-break: break-word;
    color: var(--text, var(--c-ink));
    background: rgba(0, 0, 0, 0.35);
    border: 1px solid var(--border-2, rgba(255, 255, 255, 0.08));
    padding: 18px 20px;
    overflow-x: auto;
}

.doc-plaintext {
    white-space: pre-wrap;
    word-break: break-word;
    background: none;
    border: none;
    padding: 0;
}

/* ── The PDF surfaces ──────────────────────────────────────── */

.doc-pdf-rail {
    flex: 0 0 auto;
    width: 46px;
    max-height: calc(100vh - 150px);
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding: 4px;
    position: sticky;
    top: 0;
}

.doc-pdf-rail-item {
    font-family: 'Space Grotesk', ui-sans-serif, system-ui, sans-serif;
    font-size: 11px;
    font-variant-numeric: tabular-nums;
    color: var(--text-dim, var(--c-ink-dim));
    background: transparent;
    border: 1px solid var(--border-2, rgba(255, 255, 255, 0.08));
    padding: 5px 0;
    cursor: pointer;
    transition: color 150ms ease, border-color 150ms ease, background 150ms ease;
}

.doc-pdf-rail-item:hover {
    color: var(--c-accent, #cc9050);
    border-color: var(--border-accent, rgba(204, 144, 80, 0.22));
    background: rgba(204, 144, 80, 0.06);
}

.doc-pdf-pages {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}

.doc-pdf-page {
    position: relative;
    background: #fff;
    box-shadow: 0 2px 18px rgba(0, 0, 0, 0.5);
    line-height: 0;
    max-width: 100%;
}

.doc-pdf-canvas {
    display: block;
    max-width: 100%;
    height: auto;
}

.doc-pdf-textlayer {
    position: absolute;
    inset: 0;
    overflow: hidden;
    line-height: 1;
    opacity: 0.06;
}

.doc-pdf-textlayer span {
    position: absolute;
    white-space: pre;
    color: #000;
    transform-origin: 0 0;
}

/* ── The slide surfaces ────────────────────────────────────── */

.doc-slides {
    display: flex;
    flex-direction: column;
    gap: 16px;
    max-width: 900px;
    margin: 0 auto;
    width: 100%;
}

.doc-slide {
    border: 1px solid var(--border-2, rgba(255, 255, 255, 0.08));
    background: rgba(255, 255, 255, 0.02);
}

.doc-slide-head {
    display: flex;
    align-items: baseline;
    gap: 8px;
    padding: 9px 14px;
    border-bottom: 1px solid var(--border-2, rgba(255, 255, 255, 0.08));
    background: rgba(255, 255, 255, 0.02);
}

.doc-slide-num {
    font-family: 'Space Grotesk', ui-sans-serif, system-ui, sans-serif;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--c-accent, #cc9050);
}

.doc-slide-total {
    font-size: 10px;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text-dim, var(--c-ink-dim));
}

.doc-slide-body {
    padding: 16px 18px;
}

.doc-slide-line {
    margin: 0 0 8px;
    font-size: 14px;
    line-height: 1.5;
    color: var(--text, var(--c-ink));
}

.doc-slide-line:last-child { margin-bottom: 0; }

.doc-slide-empty {
    font-size: 12px;
    font-style: italic;
    color: var(--text-dim, var(--c-ink-dim));
}

/* ── The image surface ─────────────────────────────────────── */

.doc-image-wrap {
    display: flex;
    justify-content: center;
    align-items: flex-start;
    min-height: 0;
}

.doc-image {
    max-width: 100%;
    height: auto;
    border: 1px solid var(--border-2, rgba(255, 255, 255, 0.08));
    background: #fff;
}

/* ── The interactive frame ─────────────────────────────────── */

.doc-idoc-frame {
    width: 100%;
    height: 100%;
    min-height: 0;
    border: none;
    background: var(--bg);
    display: block;
}

/* ── The state screens ─────────────────────────────────────── */

.doc-viewer-state {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
    padding: 60px 24px;
    text-align: center;
    min-height: 240px;
}

.doc-viewer-state-icon {
    font-size: 32px;
    color: var(--text-dim, var(--c-ink-dim));
    opacity: 0.55;
}

.doc-viewer-state--bad .doc-viewer-state-icon {
    color: var(--c-bad, #e05252);
    opacity: 0.85;
}

.doc-viewer-state-label {
    font-family: 'Space Grotesk', ui-sans-serif, system-ui, sans-serif;
    font-size: 13px;
    color: var(--text, var(--c-ink));
}

.doc-viewer-state-detail {
    font-size: 11px;
    color: var(--text-dim, var(--c-ink-dim));
    max-width: 420px;
    line-height: 1.5;
}

.doc-viewer-spinner {
    width: 22px;
    height: 22px;
    border: 2px solid var(--border-2, rgba(255, 255, 255, 0.08));
    border-top-color: var(--c-accent, #cc9050);
    border-radius: 50%;
    animation: docViewerSpin 720ms linear infinite;
}

@keyframes docViewerSpin {
    to { transform: rotate(360deg); }
}

/* ── The spreadsheet surface ───────────────────────────────── */

.doc-viewer-content .ql-table-wrap {
    max-width: 1000px;
    margin: 0 auto;
}

/* ── Mobile ────────────────────────────────────────────────── */

@media (max-width: 768px) {
    .doc-viewer-content {
        padding: 20px 16px;
    }

    .doc-viewer-content:has(.doc-pdf-pages) {
        padding: 14px 12px;
        gap: 10px;
    }

    .doc-pdf-rail {
        width: 34px;
    }

    .doc-pdf-rail-item {
        font-size: 10px;
        padding: 4px 0;
    }

    .doc-prose {
        font-size: 14px;
    }

    .doc-prose h1 { font-size: 1.55em; }
    .doc-prose h2 { font-size: 1.3em; }

    .doc-code {
        font-size: 11.5px;
        padding: 14px 14px;
    }
}

/* Device-based UI limitations disabled — all devices get full animations */