.pdf-tool-layout {
    display: grid;
    gap: var(--space-xl);
    grid-template-columns: minmax(0, 1.15fr) minmax(320px, 0.85fr);
}

.pdf-tool-layout.is-merge-layout {
    align-items: start;
    grid-template-columns: minmax(0, 1.18fr) minmax(320px, 0.82fr);
}

.pdf-tool-layout.is-merge-layout .pdf-tool-column:last-child {
    position: sticky;
    top: calc(var(--space-xl) + 1.5rem);
}

.pdf-tool-column {
    display: grid;
    gap: var(--space-lg);
}

.pdf-tool-card {
    border: 1px solid var(--border-subtle, rgba(15, 23, 42, 0.12));
    border-radius: var(--radius-lg);
    background: var(--bg-secondary, #ffffff);
    box-shadow: var(--shadow-sm);
    padding: var(--space-lg);
}

.pdf-tool-card h2,
.pdf-tool-card h3 {
    margin: 0 0 var(--space-sm);
}

.pdf-tool-card p {
    margin: 0;
}

.pdf-tool-card-header {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-sm);
    margin-bottom: var(--space-sm);
}

.pdf-tool-note {
    border-left: 4px solid var(--color-warning, #f59e0b);
    background: rgba(245, 158, 11, 0.08);
}

.pdf-tool-note p + p {
    margin-top: var(--space-sm);
}

.pdf-tool-meta {
    color: var(--text-secondary, #475569);
    font-size: 0.95rem;
    line-height: 1.6;
}

.pdf-tool-status {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-full);
    background: rgba(67, 97, 238, 0.08);
    color: var(--color-primary, #4361ee);
    font-size: 0.82rem;
    font-weight: 600;
}

.pdf-tool-status.is-warning {
    background: rgba(245, 158, 11, 0.14);
    color: #b45309;
}

.pdf-tool-status.is-error {
    background: rgba(239, 68, 68, 0.12);
    color: #b91c1c;
}

.pdf-tool-summary,
.pdf-tool-info-banner {
    border: 1px solid var(--border-subtle, rgba(15, 23, 42, 0.12));
    border-radius: var(--radius-md);
    background: var(--bg-tertiary, #f8fafc);
    padding: var(--space-md);
}

.pdf-tool-summary {
    display: grid;
    gap: 0.45rem;
    background: rgba(67, 97, 238, 0.04);
    border-color: rgba(67, 97, 238, 0.12);
    box-shadow: none;
    margin: var(--space-md) 0 var(--space-lg);
    padding: 0.85rem 1rem;
}

.pdf-tool-summary.is-warning {
    background: rgba(245, 158, 11, 0.08);
    border-color: rgba(245, 158, 11, 0.24);
}

.pdf-tool-summary-header {
    align-items: center;
    display: flex;
    gap: var(--space-sm);
    justify-content: space-between;
}

.pdf-tool-summary-body {
    display: grid;
    gap: 0.45rem;
}

.pdf-tool-info-banner {
    margin-top: var(--space-sm);
}

.pdf-tool-summary-title {
    font-size: 0.78rem;
    font-weight: 700;
    color: var(--text-primary, #0f172a);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.pdf-tool-summary-badge {
    align-items: center;
    background: rgba(67, 97, 238, 0.1);
    border-radius: var(--radius-full);
    color: var(--color-primary, #4361ee);
    display: inline-flex;
    font-size: 0.72rem;
    font-weight: 700;
    min-height: 1.6rem;
    padding: 0.1rem 0.6rem;
    white-space: nowrap;
}

.pdf-tool-summary-badge.is-warning {
    background: rgba(245, 158, 11, 0.16);
    color: #b45309;
}

.pdf-tool-summary-line {
    color: var(--text-secondary, #475569);
    font-size: 0.88rem;
    line-height: 1.45;
    padding-left: 0.85rem;
    position: relative;
}

.pdf-tool-summary-line::before {
    background: rgba(67, 97, 238, 0.24);
    border-radius: 999px;
    content: '';
    height: 0.35rem;
    left: 0;
    position: absolute;
    top: 0.5rem;
    width: 0.35rem;
}

.pdf-tool-summary.is-warning .pdf-tool-summary-line::before {
    background: rgba(245, 158, 11, 0.42);
}

.pdf-tool-summary-line.is-emphasis {
    color: var(--text-primary, #0f172a);
    font-size: 0.92rem;
    font-weight: 600;
}

.pdf-tool-input {
    width: 100%;
}

.pdf-tool-help {
    color: var(--text-secondary, #475569);
    font-size: 0.9rem;
    margin-top: var(--space-xs);
}

.pdf-tool-help.is-error {
    color: #b91c1c;
}

.pdf-tool-actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.pdf-tool-file-list,
.pdf-tool-result-list {
    display: grid;
    gap: var(--space-sm);
}

.pdf-tool-file-list {
    gap: 0.75rem;
}

.pdf-tool-file-item,
.pdf-tool-result-item {
    border: 1px solid var(--border-subtle, rgba(15, 23, 42, 0.12));
    border-radius: var(--radius-md);
    background: var(--bg-tertiary, #f8fafc);
    padding: var(--space-md);
}

.pdf-tool-file-item {
    display: grid;
    gap: 0.65rem;
}

.pdf-tool-merge-item {
    background: #ffffff;
    border-color: rgba(148, 163, 184, 0.24);
    box-shadow: none;
    min-height: 7.5rem;
    padding: 0.9rem 1rem;
}

.pdf-tool-file-item.is-highlighted {
    border-color: rgba(67, 97, 238, 0.5);
    box-shadow: 0 0 0 2px rgba(67, 97, 238, 0.1);
}

.pdf-tool-file-row,
.pdf-tool-result-row {
    align-items: start;
    display: grid;
    gap: 0.75rem;
    grid-template-columns: minmax(0, 1fr) auto;
}

.pdf-tool-file-label {
    display: grid;
    gap: 0.15rem;
    flex: 1 1 220px;
    min-width: 0;
}

.pdf-tool-file-order {
    align-items: center;
    background: rgba(67, 97, 238, 0.08);
    border-radius: var(--radius-full);
    color: var(--color-primary, #4361ee);
    display: inline-flex;
    font-size: 0.74rem;
    font-weight: 700;
    justify-content: center;
    letter-spacing: 0.02em;
    min-height: 1.55rem;
    padding: 0.05rem 0.55rem;
    width: fit-content;
}

.pdf-tool-file-name,
.pdf-tool-result-name {
    font-weight: 600;
    line-height: 1.4;
    word-break: break-word;
}

.pdf-tool-result-meta,
.pdf-tool-file-meta {
    color: var(--text-secondary, #475569);
    font-size: 0.9rem;
}

.pdf-tool-merge-meta {
    align-items: center;
    background: rgba(248, 250, 252, 0.96);
    border: 1px solid rgba(148, 163, 184, 0.18);
    border-radius: var(--radius-md);
    display: inline-flex;
    gap: var(--space-xs);
    line-height: 1.4;
    min-height: 2.35rem;
    padding: 0.4rem 0.7rem;
    width: fit-content;
}

.pdf-tool-inline-actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
    justify-content: flex-start;
    align-self: center;
}

.pdf-tool-inline-actions .btn {
    border-radius: var(--radius-full);
    font-size: 0.82rem;
    gap: 0.4rem;
    min-width: 0;
    padding: 0.4rem 0.72rem;
    white-space: nowrap;
}

.pdf-tool-merge-item .pdf-tool-inline-actions .btn {
    background: rgba(248, 250, 252, 1);
    border: 1px solid rgba(148, 163, 184, 0.28);
    color: var(--text-primary, #0f172a);
}

.pdf-tool-merge-item .pdf-tool-inline-actions .btn:hover:not(:disabled) {
    background: #ffffff;
    border-color: rgba(67, 97, 238, 0.3);
}

.pdf-tool-preview {
    border: 1px solid var(--border-subtle, rgba(15, 23, 42, 0.12));
    border-radius: var(--radius-md);
    display: block;
    margin-top: var(--space-sm);
    max-width: 100%;
}

.pdf-tool-placeholder {
    color: var(--text-secondary, #64748b);
    font-size: 0.95rem;
}

.pdf-tool-result-list {
    min-height: 120px;
}

.pdf-tool-busy {
    opacity: 0.72;
    pointer-events: none;
}

@media (max-width: 960px) {
    .pdf-tool-layout {
        grid-template-columns: 1fr;
    }

    .pdf-tool-layout.is-merge-layout .pdf-tool-column:last-child {
        position: static;
        top: auto;
    }

    .pdf-tool-file-row,
    .pdf-tool-result-row {
        align-items: flex-start;
        grid-template-columns: 1fr;
    }

    .pdf-tool-summary-header {
        align-items: flex-start;
        flex-direction: column;
    }

    .pdf-tool-inline-actions {
        justify-content: flex-start;
        width: 100%;
    }

    .pdf-tool-inline-actions .btn {
        flex: 1 1 9rem;
    }

    .pdf-tool-merge-meta {
        width: 100%;
    }

}