/* ===================== 合并 PDF ===================== */
/* 工具页默认占满整个电脑端屏幕（与工具箱规范一致），保留左侧导航 */
body.page-mpdf-full .app { max-width: 100%; }
body.page-mpdf-full .main-content { max-width: 100%; width: 100%; border-right: 0; }

.mpdf-page {
    --mpdf-bg: var(--bg-secondary, #f6f7fa);
    --mpdf-card: var(--bg-primary, #fff);
    --mpdf-border: var(--border-color, #e6e8eb);
    --mpdf-text: var(--text-primary, #1f2328);
    --mpdf-sub: var(--text-secondary, #6b7280);
    --mpdf-accent: var(--accent, #136ce9);
    --mpdf-danger: var(--danger, #d93025);

    max-width: none;
    margin: 0;
    padding: 26px 16px 72px;
    box-sizing: border-box;
    color: var(--mpdf-text);
}

/* ---------- Hero ---------- */
.mpdf-hero {
    display: flex;
    gap: 16px;
    align-items: flex-start;
    padding: 22px 22px 20px;
    background: var(--mpdf-card);
    border: 1px solid var(--mpdf-border);
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, .05);
}

.mpdf-hero-icon {
    flex: 0 0 auto;
    width: 54px;
    height: 54px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    background: linear-gradient(135deg, #2f7ff5, #136ce9);
    box-shadow: 0 6px 16px rgba(19, 108, 233, .28);
}

.mpdf-hero-icon svg { width: 28px; height: 28px; }
.mpdf-hero-text { min-width: 0; }
.mpdf-hero-text h1 { margin: 0 0 6px; font-size: 24px; line-height: 1.25; font-weight: 700; }
.mpdf-hero-text p { margin: 0; font-size: 14px; line-height: 1.7; color: var(--mpdf-sub); }

.mpdf-hero-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }

.mpdf-tag {
    font-size: 12px;
    padding: 4px 10px;
    border-radius: 999px;
    background: rgba(19, 108, 233, .08);
    color: var(--mpdf-accent);
    border: 1px solid rgba(19, 108, 233, .18);
}

/* ---------- 卡片 ---------- */
.mpdf-card {
    margin-top: 18px;
    padding: 20px;
    background: var(--mpdf-card);
    border: 1px solid var(--mpdf-border);
    border-radius: 16px;
    box-shadow: 0 2px 12px rgba(0, 0, 0, .04);
}

.mpdf-card-title { margin: 0 0 16px; font-size: 16px; font-weight: 700; }

/* ---------- 上传区 ---------- */
.mpdf-drop {
    border: 2px dashed #c9d4e4;
    border-radius: 16px;
    background: linear-gradient(180deg, rgba(19, 108, 233, .03), rgba(19, 108, 233, 0));
    padding: 34px 20px 26px;
    text-align: center;
    cursor: pointer;
    transition: border-color .18s, background .18s;
}

.mpdf-drop:hover,
.mpdf-drop:focus-visible { border-color: var(--mpdf-accent); outline: none; }
.mpdf-drop.is-over { border-color: var(--mpdf-accent); background: rgba(19, 108, 233, .07); }

.mpdf-drop-icon {
    width: 56px;
    height: 56px;
    margin: 0 auto 10px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--mpdf-accent);
    background: rgba(19, 108, 233, .1);
}

.mpdf-drop-icon svg { width: 28px; height: 28px; }
.mpdf-drop-title { font-size: 17px; font-weight: 700; margin-bottom: 14px; }
.mpdf-drop-btn { pointer-events: none; }

.mpdf-drop-sub {
    margin-top: 12px;
    font-size: 13px;
    color: var(--mpdf-sub);
    display: flex;
    gap: 8px;
    justify-content: center;
    flex-wrap: wrap;
}

.mpdf-drop-or { position: relative; padding-left: 10px; }
.mpdf-drop-or::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 1px;
    height: 12px;
    background: #d5dbe5;
}

.mpdf-drop-hint { margin-top: 10px; font-size: 12px; color: #9aa3b2; }

/* ---------- 文件列表 ---------- */
.mpdf-files-head {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
    margin-top: 18px;
    padding-top: 16px;
    border-top: 1px solid var(--mpdf-border);
}

.mpdf-files-info { font-size: 14px; color: var(--mpdf-sub); }
.mpdf-files-info strong { color: var(--mpdf-text); font-size: 15px; }
.mpdf-files-ops { margin-left: auto; display: flex; gap: 8px; }

.mpdf-tipbox {
    margin-top: 12px;
    padding: 10px 12px;
    border-radius: 10px;
    background: rgba(19, 108, 233, .06);
    border: 1px solid rgba(19, 108, 233, .16);
    color: var(--mpdf-sub);
    font-size: 13px;
    line-height: 1.7;
}

.mpdf-files {
    margin-top: 14px;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(168px, 1fr));
    gap: 12px;
}

.mpdf-file {
    position: relative;
    border: 1px solid var(--mpdf-border);
    border-radius: 12px;
    background: var(--mpdf-card);
    padding: 8px 8px 10px;
    cursor: grab;
    transition: box-shadow .16s, transform .16s, border-color .16s;
}

.mpdf-file:hover { box-shadow: 0 6px 18px rgba(0, 0, 0, .08); }
.mpdf-file.is-drag { opacity: .45; }
.mpdf-file.is-over { border-color: var(--mpdf-accent); transform: translateY(-2px); }

.mpdf-file-thumb {
    position: relative;
    height: 132px;
    border-radius: 8px;
    overflow: hidden;
    background: #f2f4f8;
    display: flex;
    align-items: center;
    justify-content: center;
}

.mpdf-file-thumb img {
    max-width: 100%;
    max-height: 100%;
    display: block;
    object-fit: contain;
    background: #fff;
    box-shadow: 0 1px 6px rgba(0, 0, 0, .12);
    transition: transform .2s;
}

.mpdf-file-thumb .mpdf-thumb-loading { font-size: 12px; color: #9aa3b2; }

.mpdf-file-idx {
    position: absolute;
    top: 6px;
    left: 6px;
    min-width: 20px;
    height: 20px;
    padding: 0 5px;
    border-radius: 6px;
    background: rgba(0, 0, 0, .62);
    color: #fff;
    font-size: 12px;
    font-weight: 700;
    line-height: 20px;
    text-align: center;
}

.mpdf-file-name {
    margin-top: 8px;
    font-size: 12px;
    line-height: 1.4;
    color: var(--mpdf-text);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.mpdf-file-meta { margin-top: 2px; font-size: 11px; color: #9aa3b2; }

.mpdf-file-ops { margin-top: 8px; display: flex; gap: 6px; }

.mpdf-file-ops button {
    flex: 1;
    padding: 5px 0;
    font-size: 12px;
    border: 1px solid var(--mpdf-border);
    border-radius: 8px;
    background: var(--mpdf-card);
    color: var(--mpdf-sub);
    cursor: pointer;
    transition: color .15s, border-color .15s, background .15s;
}

.mpdf-file-ops button:hover {
    color: var(--mpdf-accent);
    border-color: var(--mpdf-accent);
    background: rgba(19, 108, 233, .06);
}

.mpdf-file-ops button.mpdf-del:hover {
    color: var(--mpdf-danger);
    border-color: var(--mpdf-danger);
    background: rgba(217, 48, 37, .06);
}

/* 自定义页面范围输入 */
.mpdf-range { margin-top: 8px; }

.mpdf-range input {
    width: 100%;
    box-sizing: border-box;
    padding: 6px 8px;
    font-size: 12px;
    border: 1px solid var(--mpdf-border);
    border-radius: 8px;
    color: var(--mpdf-text);
    background: var(--mpdf-bg);
}

.mpdf-range input:focus { outline: none; border-color: var(--mpdf-accent); background: #fff; }
.mpdf-range-note { margin-top: 4px; font-size: 11px; color: #9aa3b2; }

/* ---------- 选项 ---------- */
.mpdf-field { margin-bottom: 18px; }
.mpdf-field:last-child { margin-bottom: 0; }
.mpdf-label { display: block; margin-bottom: 8px; font-size: 13px; font-weight: 700; color: var(--mpdf-text); }
.mpdf-note { margin-top: 6px; font-size: 12px; color: #9aa3b2; }

.mpdf-radios { display: flex; flex-direction: column; gap: 10px; }

.mpdf-radio {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    font-size: 14px;
    cursor: pointer;
    color: var(--mpdf-text);
}

.mpdf-radio input { margin-top: 3px; accent-color: var(--mpdf-accent); }
.mpdf-radio-note { display: block; font-size: 12px; color: #9aa3b2; }

.mpdf-check { display: flex; align-items: flex-start; gap: 9px; font-size: 14px; cursor: pointer; }
.mpdf-check input { margin-top: 3px; accent-color: var(--mpdf-accent); }
.mpdf-check-note { display: block; margin-top: 3px; font-size: 12px; color: #9aa3b2; }

/* ---------- 按钮 ---------- */
.mpdf-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 11px 22px;
    font-size: 14px;
    font-weight: 700;
    border-radius: 10px;
    border: 1px solid transparent;
    cursor: pointer;
    transition: transform .12s, box-shadow .15s, background .15s, opacity .15s;
}

.mpdf-btn:disabled { opacity: .5; cursor: not-allowed; }

.mpdf-btn-primary {
    background: var(--mpdf-accent);
    color: #fff;
    box-shadow: 0 6px 16px rgba(19, 108, 233, .26);
}

.mpdf-btn-primary:not(:disabled):hover { transform: translateY(-1px); box-shadow: 0 8px 20px rgba(19, 108, 233, .32); }

.mpdf-btn-ghost {
    background: var(--mpdf-card);
    color: var(--mpdf-sub);
    border-color: var(--mpdf-border);
}

.mpdf-btn-ghost:hover { color: var(--mpdf-text); border-color: #c3ccd9; }
.mpdf-btn-sm { padding: 7px 14px; font-size: 13px; border-radius: 9px; }
.mpdf-btn-lg { padding: 14px 40px; font-size: 16px; }

.mpdf-actions { margin-top: 22px; text-align: center; }

/* ---------- 进度 / 结果 / 提示 ---------- */
.mpdf-progress { margin-top: 18px; }
.mpdf-progress-track { height: 8px; border-radius: 999px; background: #e8ecf3; overflow: hidden; }

.mpdf-progress-bar {
    height: 100%;
    width: 0;
    border-radius: 999px;
    background: linear-gradient(90deg, #2f7ff5, #136ce9);
    transition: width .2s;
}

.mpdf-progress-text { margin-top: 8px; font-size: 13px; color: var(--mpdf-sub); text-align: center; }

.mpdf-error {
    margin-top: 16px;
    padding: 12px 14px;
    border-radius: 10px;
    background: rgba(217, 48, 37, .08);
    border: 1px solid rgba(217, 48, 37, .25);
    color: var(--mpdf-danger);
    font-size: 13px;
}

.mpdf-result { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
.mpdf-result-head { display: flex; align-items: center; gap: 12px; min-width: 0; }
.mpdf-result-icon { font-size: 26px; }
.mpdf-result-title { font-size: 16px; font-weight: 700; }
.mpdf-result-stats { margin-top: 3px; font-size: 13px; color: var(--mpdf-sub); }
.mpdf-result-ops { margin-left: auto; display: flex; gap: 10px; flex-wrap: wrap; }

/* ---------- 说明 ---------- */
.mpdf-help summary { cursor: pointer; font-size: 15px; font-weight: 700; }
.mpdf-help ol, .mpdf-help dl { margin: 12px 0 0; padding-left: 20px; font-size: 14px; line-height: 1.8; color: var(--mpdf-sub); }
.mpdf-help dt { font-weight: 700; color: var(--mpdf-text); }
.mpdf-help dd { margin: 0 0 10px; }
.mpdf-help strong { color: var(--mpdf-text); }
.mpdf-help code {
    padding: 1px 5px;
    border-radius: 5px;
    background: rgba(19, 108, 233, .08);
    color: var(--mpdf-accent);
    font-size: 13px;
}

/* ---------- Toast ---------- */
.mpdf-toast {
    position: fixed;
    left: 50%;
    bottom: 40px;
    transform: translate(-50%, 16px);
    padding: 10px 18px;
    border-radius: 10px;
    background: rgba(28, 34, 45, .92);
    color: #fff;
    font-size: 13px;
    opacity: 0;
    pointer-events: none;
    transition: opacity .2s, transform .2s;
    z-index: 9999;
}

.mpdf-toast.is-show { opacity: 1; transform: translate(-50%, 0); }

/* ---------- 响应式 ---------- */
@media (max-width: 640px) {
    .mpdf-page { padding: 16px 12px 56px; }
    .mpdf-hero { padding: 18px 16px; gap: 12px; }
    .mpdf-hero-text h1 { font-size: 20px; }
    .mpdf-card { padding: 16px; }
    .mpdf-drop { padding: 24px 14px 20px; }
    .mpdf-drop-sub { flex-direction: column; gap: 4px; }
    .mpdf-drop-or::before { display: none; }
    .mpdf-files { grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap: 10px; }
    .mpdf-files-ops { margin-left: 0; }
    .mpdf-btn-lg { width: 100%; }
    .mpdf-result-ops { margin-left: 0; width: 100%; }
    .mpdf-result-ops .mpdf-btn { flex: 1; }
}