/* PDF 병합 — 공통 도구 스타일(tools-common.css)에 없는 것만 정의한다. */

.pm-drop {
    border: 2px dashed var(--border-color, #d8dce3);
    border-radius: var(--radius-md, 8px);
    padding: var(--spacing-xl, 2rem) var(--spacing-lg, 1.5rem);
    text-align: center;
    cursor: pointer;
    transition: border-color .15s ease, background-color .15s ease;
    background: var(--bg-subtle, #f8f9fb);
}
.pm-drop:hover,
.pm-drop:focus-visible,
.pm-drop.is-over {
    border-color: var(--primary-color, #3b6fe0);
    background: var(--primary-soft, #eef3fd);
    outline: none;
}
.pm-drop.is-disabled { opacity: .5; pointer-events: none; }
.pm-drop > i {
    font-size: 2rem;
    color: var(--primary-color, #3b6fe0);
    margin-bottom: var(--spacing-sm, .5rem);
}
.pm-drop-title { margin: 0 0 .25rem; font-weight: 600; }
.pm-drop-hint  { margin: 0; font-size: var(--text-ui-sm, .8125rem); color: var(--text-muted, #626977); }

/* 파일 목록 — 순서가 곧 병합 순서다. 번호를 보여 준다. */
.pm-list {
    list-style: none;
    counter-reset: pm;
    margin: var(--spacing-md, 1rem) 0 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: .375rem;
}
.pm-item {
    counter-increment: pm;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm, .5rem);
    padding: .5rem .625rem;
    border: 1px solid var(--border-color, #e5e8ed);
    border-radius: var(--radius-sm, 6px);
    background: var(--bg-surface, #fff);
}
.pm-item::before {
    content: counter(pm);
    flex: 0 0 auto;
    width: 1.5rem;
    height: 1.5rem;
    display: grid;
    place-items: center;
    border-radius: 50%;
    background: var(--primary-soft, #eef3fd);
    color: var(--primary-color, #3b6fe0);
    font-size: var(--text-ui-sm, .8125rem);
    font-weight: 700;
}
.pm-item-info {
    flex: 1 1 auto;
    min-width: 0;              /* 긴 파일명이 레이아웃을 밀지 않게 */
    display: flex;
    flex-direction: column;
}
.pm-item-name {
    font-size: var(--text-sm, .875rem);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.pm-item-meta {
    font-size: var(--text-ui-sm, .8125rem);
    color: var(--text-muted, #626977);
}
.pm-item-actions { flex: 0 0 auto; display: flex; gap: .25rem; }

.pm-stats { margin-top: var(--spacing-md, 1rem); }

.pm-empty {
    text-align: center;
    padding: var(--spacing-xl, 2rem) var(--spacing-md, 1rem);
    color: var(--text-muted, #626977);
}
.pm-empty > i { font-size: 1.75rem; display: block; margin-bottom: .5rem; opacity: .6; }
.pm-empty > p { margin: 0; font-size: var(--text-sm, .875rem); }

.pm-progress {
    display: flex;
    align-items: center;
    gap: .5rem;
    margin-top: var(--spacing-md, 1rem);
    font-size: var(--text-sm, .875rem);
    color: var(--text-muted, #626977);
}

.pm-alert { margin-top: var(--spacing-md, 1rem); }

@media (max-width: 768px) {
    .pm-item-actions .btn-tool { padding: .375rem .5rem; }
}