:root {
    --bg: #f7f7f8;
    --surface: #ffffff;
    --border: #e2e2e3;
    --text: #0f172a;
    --muted: #475569;
    --muted-2: #64748b;
    --accent: #2563eb;
    --accent-contrast: #ffffff;
    --ok: #16a34a;
    --danger: #dc2626;
    --warning: #eab308;
    --highlight-bg: #fde68a;
    --subtle-surface: #fafafa;
    --shadow: none;
    --radius: 8px;
}

html[data-theme="dark"] {
    --bg: #0b0e14;
    --surface: #0f131b;
    --border: #1e2533;
    --text: #e5e7eb;
    --muted: #94a3b8;
    --muted-2: #7c8aa0;
    --accent: #3b82f6;
    --accent-contrast: #0b0e14;
    --ok: #22c55e;
    --danger: #ef4444;
    --warning: #f59e0b;
    --highlight-bg: #facc15;
    --subtle-surface: #0c111a;
    --shadow: none;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html, body {
    height: 100%;
}

body {
    font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica Neue, Arial, Noto Sans, "Apple Color Emoji", "Segoe UI Emoji";
    line-height: 1.5;
    color: var(--text);
    background: var(--bg);
}

.app {
    width: min(1120px, calc(100% - 32px));
    margin: 28px auto 60px;
}

.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 14px 16px;
    border-radius: var(--radius);
    background: var(--surface);
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
}

.brand {
    display: flex;
    align-items: center;
    gap: 12px;
    min-width: 0;
}

.brand-logo {
    width: 28px;
    height: 28px;
    object-fit: contain;
    border-radius: 4px;
}

.brand-mark {
    width: 28px;
    height: 28px;
    border-radius: calc(var(--radius) - 2px);
    background: transparent;
    border: 2px solid var(--border);
}

.brand-text {
    display: flex;
    flex-direction: column;
    gap: 2px;
    min-width: 0;
}

.brand-title {
    font-size: 1.02rem;
    font-weight: 700;
    letter-spacing: 0.2px;
}

.brand-subtitle {
    font-size: 0.86rem;
    color: var(--muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.topbar-actions { display: flex; gap: 8px; align-items: center; }

.topbar-link {
    color: var(--muted);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.92rem;
    padding: 8px 10px;
    border-radius: var(--radius);
    border: 1px solid transparent;
    background: transparent;
}

.topbar-link:hover { background: var(--subtle-surface); border-color: var(--border); color: var(--text); }

.layout {
    display: grid;
    grid-template-columns: 1fr;
    gap: 14px;
    margin-top: 16px;
}

.card {
    padding: 16px;
    border-radius: var(--radius);
    background: var(--surface);
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
}

.card-title {
    font-size: 1.04rem;
    font-weight: 700;
    letter-spacing: 0.2px;
}

.card-subtitle {
    margin-top: 6px;
    font-size: 0.92rem;
    color: var(--muted);
}

#file-input {
    display: none;
}

.upload-row {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 12px;
    align-items: center;
    margin-top: 14px;
}

.upload-drop {
    display: flex;
    flex-direction: column;
    gap: 6px;
    padding: 16px 16px;
    border-radius: var(--radius);
    border: 1px dashed var(--border);
    background: var(--subtle-surface);
    cursor: pointer;
}

.upload-drop:hover { background: var(--surface); }

.upload-drop.drag-over {
    border-color: var(--accent);
    background: var(--subtle-surface);
}

.upload-drop-title {
    font-weight: 650;
    font-size: 0.98rem;
}

.upload-drop-hint {
    font-size: 0.86rem;
    color: var(--muted-2);
}

.selected-file {
    margin-top: 6px;
    font-size: 0.88rem;
    color: var(--text);
    padding: 8px 10px;
    border-radius: calc(var(--radius) - 2px);
    border: 1px solid var(--border);
    background: var(--subtle-surface);
}

.search-bar {
    display: flex;
    gap: 10px;
    margin-top: 14px;
}

.search-input {
    flex: 1;
    padding: 10px 12px;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    background: var(--subtle-surface);
    color: var(--text);
    outline: none;
    font-size: 0.95rem;
}

.search-input::placeholder {
    color: var(--muted-2);
}

.search-input:focus {
    border-color: var(--accent);
}

.button {
    padding: 10px 14px;
    border: none;
    border-radius: var(--radius);
    font-size: 0.95rem;
    cursor: pointer;
    font-weight: 700;
    white-space: nowrap;
}

.button-primary {
    color: var(--accent-contrast);
    background: var(--accent);
    border: 1px solid var(--accent);
}

.button-primary:hover:not(:disabled) { filter: brightness(0.95); }

.button-primary:disabled {
    cursor: not-allowed;
    opacity: 0.6;
}

.button-ghost {
    color: var(--muted);
    background: transparent;
    border: 1px solid var(--border);
}

.status-message {
    margin-top: 12px;
    padding: 12px 12px;
    border-radius: var(--radius);
    font-size: 0.92rem;
    border: 1px solid var(--border);
    background: var(--subtle-surface);
}

.status-message.success {
    border-color: color-mix(in oklab, var(--ok) 30%, var(--border));
    color: var(--text);
}

.status-message.error {
    border-color: color-mix(in oklab, var(--danger) 30%, var(--border));
    color: var(--text);
}

.status-message.info {
    border-color: color-mix(in oklab, var(--accent) 30%, var(--border));
    color: var(--text);
}

.meta-card {
    padding: 14px 18px;
}

.meta-pills {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 10px;
}

.pill-cache { display: none; }

.pill {
    padding: 12px 12px;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    background: var(--subtle-surface);
}

.pill-label {
    font-size: 0.82rem;
    color: var(--muted);
}

.pill-value {
    margin-top: 4px;
    font-size: 1.04rem;
    font-weight: 800;
}

.pill-value.subtle { font-size: 0.9rem; opacity: 0.6; font-weight: 600; }

.viewer-card {
    padding: 12px;
}

.viewer-header {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 10px;
    padding: 6px 6px 10px;
}

.viewer-heading {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.viewer-subtitle {
    font-size: 0.88rem;
    color: var(--muted-2);
}

.document-display {
    background: var(--subtle-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px;
    max-height: min(64vh, 720px);
    overflow: auto;
    white-space: pre-wrap;
    word-break: break-word;
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
    font-size: 0.94rem;
    line-height: 1.6;
    color: var(--text);
}

mark.highlight {
    background: var(--highlight-bg);
    color: inherit;
    padding: 1px 2px;
    border-radius: 3px;
    border: 1px solid color-mix(in oklab, var(--warning) 35%, var(--border));
    box-decoration-break: clone;
    -webkit-box-decoration-break: clone;
}

@media (min-width: 980px) {
    .layout {
        grid-template-columns: 1.2fr 0.8fr;
        grid-template-areas:
            "upload viewer"
            "search viewer"
            "meta viewer";
        align-items: start;
    }

    #upload-section { grid-area: upload; }
    #search-section { grid-area: search; }
    #metadata-section { grid-area: meta; }
    #document-section { grid-area: viewer; position: sticky; top: 16px; }
}

@media (max-width: 560px) {
    .app {
        width: calc(100% - 24px);
        margin: 18px auto 40px;
    }

    .upload-row {
        grid-template-columns: 1fr;
    }

    .search-bar {
        flex-direction: column;
    }

    .button {
        width: 100%;
    }

    .meta-pills {
        grid-template-columns: 1fr;
    }
}