/* =====================================================================
 * Excel 合并单元格还原与表格结构修复 · 独立皮肤（GRID STUDIO）
 * ---------------------------------------------------------------------
 * 与「公式审计台」完全不同的设计语言：暖纸底 + 靛蓝主色 + 珊瑚强调，
 * 单栏宽幅上传、策略矩阵可视化、Excel 风格电子表格预览。
 * 仍复用 forge.css 的组件基类，但在此作用域内重定义全部配色与字体变量。
 * 深色模式由导航 theme-toggle.js 驱动，本页不新增任何主题控件。
 * ===================================================================== */

.mc-page {
    --fg-bg: #f7f6f2;
    --fg-bg-grad: radial-gradient(1200px 460px at 12% -14%, rgba(79, 70, 229, .10), transparent 60%),
                  radial-gradient(900px 420px at 88% 0%, rgba(234, 88, 12, .06), transparent 58%);
    --fg-surface: #ffffff;
    --fg-surface-2: #faf9f6;
    --fg-surface-3: #f0eee8;
    --fg-ink: #1b2135;
    --fg-ink-2: #47516b;
    --fg-ink-3: #7a8299;
    --fg-line: #e4e1d9;
    --fg-line-2: #cfcbc0;
    --fg-brand: #4f46e5;
    --fg-brand-2: #4338ca;
    --fg-brand-soft: #ecebff;
    --fg-brand-ink: #3730a3;
    --fg-amber: #c2410c;
    --fg-amber-soft: #fff0e6;
    --fg-red: #be123c;
    --fg-red-soft: #fff0f3;
    --fg-orange: #c2410c;
    --fg-orange-soft: #fff0e6;
    --fg-slate: #6b7280;
    --fg-slate-soft: #eeecf3;
    --fg-shadow: 0 1px 2px rgba(27, 33, 53, .05), 0 12px 30px rgba(27, 33, 53, .07);
    --fg-shadow-lg: 0 20px 52px rgba(27, 33, 53, .14);
    --fg-radius: 16px;
    --fg-sans: "IBM Plex Sans", "Noto Sans SC", -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    --fg-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
    font-size: 15px;
    line-height: 1.8;
}

:root[data-theme="dark"] .mc-page {
    --fg-bg: #0f1119;
    --fg-bg-grad: radial-gradient(1200px 460px at 12% -14%, rgba(129, 140, 248, .12), transparent 60%),
                  radial-gradient(900px 420px at 88% 0%, rgba(251, 146, 60, .07), transparent 58%);
    --fg-surface: #181b28;
    --fg-surface-2: #1e2231;
    --fg-surface-3: #252a3b;
    --fg-ink: #eef0fa;
    --fg-ink-2: #b9c0d6;
    --fg-ink-3: #8b93ad;
    --fg-line: #2c3246;
    --fg-line-2: #3a425c;
    --fg-brand: #a5b4fc;
    --fg-brand-2: #c7d2fe;
    --fg-brand-soft: rgba(165, 180, 252, .14);
    --fg-brand-ink: #c7d2fe;
    --fg-amber: #fb923c;
    --fg-amber-soft: rgba(251, 146, 60, .13);
    --fg-red: #fb7185;
    --fg-red-soft: rgba(251, 113, 133, .13);
    --fg-orange: #fb923c;
    --fg-orange-soft: rgba(251, 146, 60, .13);
    --fg-slate: #9aa3ba;
    --fg-slate-soft: #252a3b;
    --fg-shadow: 0 1px 2px rgba(0, 0, 0, .32), 0 12px 30px rgba(0, 0, 0, .30);
    --fg-shadow-lg: 0 20px 52px rgba(0, 0, 0, .45);
}

.mc-page h1 { letter-spacing: -.025em; }
.mc-page strong { color: var(--fg-brand-ink); }

/* ---------- 首屏：三步流程条 ---------- */
.mc-flow { display: flex; align-items: center; gap: 0; flex-wrap: wrap; margin: 26px 0 22px; }
.mc-flow-step { display: flex; align-items: center; gap: 9px; font-size: 13px; color: var(--fg-ink-2); font-weight: 600; }
.mc-flow-n { width: 25px; height: 25px; border-radius: 8px; display: grid; place-items: center;
    background: var(--fg-brand-soft); color: var(--fg-brand-ink); font-size: 12px; font-weight: 800;
    font-variant-numeric: tabular-nums; }
.mc-flow-line { flex: 1 1 34px; height: 1px; min-width: 20px; margin: 0 12px; background: var(--fg-line-2); }

/* ---------- 首屏：宽幅上传区 ---------- */
.mc-hero { padding: 6px 0 26px; }
.mc-hero-head { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 24px; align-items: end; margin-bottom: 20px; }
.mc-hero h1 { margin: 12px 0 10px; }
.mc-hero h1 .mc-hl { color: var(--fg-brand); }
.mc-hero .fg-lede { max-width: 68ch; }
.mc-kws { display: flex; gap: 7px; flex-wrap: wrap; margin-top: 14px; }
.mc-kws .fg-tag { background: var(--fg-surface); border-color: var(--fg-line); font-size: 11.5px; }
.mc-limit-chip { display: inline-flex; align-items: center; gap: 8px; padding: 9px 14px; border-radius: 999px;
    background: var(--fg-surface); border: 1px solid var(--fg-line); font-size: 12.5px; color: var(--fg-ink-2);
    box-shadow: var(--fg-shadow); white-space: nowrap; }
.mc-limit-chip b { color: var(--fg-brand-ink); font-variant-numeric: tabular-nums; }

.mc-upload { position: relative; padding: 22px; }
.mc-upload::before { content: ""; position: absolute; inset: 0 0 auto 0; height: 4px;
    border-radius: var(--fg-radius) var(--fg-radius) 0 0;
    background: linear-gradient(90deg, var(--fg-brand), #818cf8 52%, var(--fg-amber)); }
.mc-drop { display: flex; align-items: center; gap: 18px; padding: 24px; cursor: pointer;
    border: 2px dashed var(--fg-line-2); border-radius: 13px; background: var(--fg-surface-2);
    transition: border-color .16s, background .16s, transform .16s; }
.mc-drop:hover, .mc-drop.is-over { border-color: var(--fg-brand); background: var(--fg-brand-soft); }
.mc-drop.is-over { transform: scale(1.004); }
.mc-drop-ico { flex: 0 0 52px; width: 52px; height: 52px; border-radius: 14px; display: grid; place-items: center;
    background: var(--fg-brand-soft); color: var(--fg-brand); }
.mc-drop-title { font-size: 16.5px; font-weight: 750; color: var(--fg-ink); line-height: 1.5; }
.mc-drop-sub { font-size: 12.5px; color: var(--fg-ink-3); line-height: 1.65; }

.mc-filelist { display: grid; gap: 7px; margin-top: 12px; }
.mc-fileitem { display: flex; align-items: center; gap: 10px; padding: 9px 12px; border-radius: 9px;
    background: var(--fg-surface-2); border: 1px solid var(--fg-line); font-size: 12.5px; }
.mc-fileitem .mc-name { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
    font-weight: 650; font-family: var(--fg-mono); color: var(--fg-ink); }
.mc-fileitem .mc-size { color: var(--fg-ink-3); font-variant-numeric: tabular-nums; }
.mc-fileitem .mc-state { padding: 1px 8px; border-radius: 999px; font-size: 11.5px; font-weight: 700;
    background: var(--fg-slate-soft); color: var(--fg-ink-3); }
.mc-fileitem .mc-state.is-ok { background: var(--fg-brand-soft); color: var(--fg-brand-ink); }
.mc-fileitem .mc-state.is-err { background: var(--fg-red-soft); color: var(--fg-red); }
.mc-fileitem .mc-x { border: 0; background: transparent; color: var(--fg-ink-3); cursor: pointer; font-size: 17px; line-height: 1; }
.mc-fileitem .mc-x:hover { color: var(--fg-red); }

/* ---------- 策略矩阵（本工具独有的可视化） ---------- */
.mc-config { margin-top: 18px; padding-top: 18px; border-top: 1px solid var(--fg-line); }
.mc-config-title { display: flex; align-items: baseline; gap: 10px; flex-wrap: wrap; margin-bottom: 12px; }
.mc-config-title h2 { font-size: 16px; }
.mc-config-title span { font-size: 12.5px; color: var(--fg-ink-3); }
.mc-strategies { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 10px; }
.mc-strategy { position: relative; display: block; cursor: pointer; padding: 13px 13px 12px; border-radius: 11px;
    border: 1.5px solid var(--fg-line); background: var(--fg-surface-2); transition: border-color .15s, background .15s, box-shadow .15s; }
.mc-strategy:hover { border-color: var(--fg-brand); }
.mc-strategy.is-on { border-color: var(--fg-brand); background: var(--fg-brand-soft); box-shadow: 0 4px 16px rgba(79, 70, 229, .10); }
.mc-strategy input { position: absolute; opacity: 0; pointer-events: none; }
.mc-strategy-top { display: flex; align-items: center; justify-content: space-between; gap: 6px; margin-bottom: 3px; }
.mc-strategy-top b { font-size: 13.5px; color: var(--fg-ink); }
.mc-strategy .mc-pill { font-size: 10.5px; padding: 1px 7px; border-radius: 999px; background: var(--fg-surface-3); color: var(--fg-ink-3); }
.mc-strategy.is-on .mc-pill { background: var(--fg-brand); color: #fff; }
.mc-strategy p { font-size: 11.5px; line-height: 1.6; color: var(--fg-ink-3); margin: 0 0 9px; min-height: 37px; }
.mc-mini { display: grid; grid-template-columns: repeat(3, 1fr); gap: 3px; width: 100%; max-width: 118px; }
.mc-mini i { display: grid; place-items: center; height: 19px; border-radius: 4px; font-style: normal;
    font-size: 9px; font-weight: 700; background: var(--fg-surface-3); color: var(--fg-ink-3); }
.mc-mini i.is-filled { background: var(--fg-brand); color: #fff; }
:root[data-theme="dark"] .mc-mini i.is-filled { color: #10121d; }
.mc-mini i.is-first { box-shadow: inset 0 0 0 2px var(--fg-amber); }

.mc-opts { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; margin-top: 16px; }
.mc-actions { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-top: 18px; }
.mc-actions .mc-note { font-size: 12px; color: var(--fg-ink-3); }
.mc-progress { height: 4px; border-radius: 4px; background: var(--fg-surface-3); overflow: hidden; margin-top: 14px; }
.mc-progress span { display: block; height: 100%; width: 0; border-radius: 4px;
    background: linear-gradient(90deg, var(--fg-brand), var(--fg-amber)); transition: width .3s; }

/* ---------- 结果：统计条 ---------- */
.mc-result { padding: 8px 0 34px; }
.mc-result-head { display: flex; justify-content: space-between; align-items: flex-end; gap: 16px; flex-wrap: wrap; margin-bottom: 14px; }
.mc-result-head h2 { font-size: 22px; margin-bottom: 4px; }
.mc-file-pill { display: inline-flex; align-items: center; gap: 7px; padding: 5px 12px; border-radius: 999px;
    background: var(--fg-surface); border: 1px solid var(--fg-line); font-family: var(--fg-mono);
    font-size: 12px; color: var(--fg-ink-2); max-width: 100%; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.mc-stats { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 14px; }
.mc-stat { display: flex; align-items: baseline; gap: 7px; padding: 7px 13px; border-radius: 10px;
    background: var(--fg-surface); border: 1px solid var(--fg-line); box-shadow: var(--fg-shadow); }
.mc-stat b { font-size: 18px; font-weight: 780; color: var(--fg-brand-ink); font-variant-numeric: tabular-nums; letter-spacing: -.02em; }
.mc-stat.is-alert b { color: var(--fg-amber); }
.mc-stat span { font-size: 11.5px; color: var(--fg-ink-3); }
.mc-warns { display: grid; gap: 8px; margin-bottom: 14px; }

/* ---------- 工作表 tabs ---------- */
.mc-sheet-tabs { display: flex; gap: 6px; flex-wrap: wrap; border-bottom: 1px solid var(--fg-line); margin-bottom: 14px; }
.mc-sheet-tab { appearance: none; border: 0; background: transparent; cursor: pointer; padding: 9px 14px;
    font-size: 13.5px; font-weight: 650; color: var(--fg-ink-3); border-bottom: 2px solid transparent; margin-bottom: -1px; }
.mc-sheet-tab:hover { color: var(--fg-brand); }
.mc-sheet-tab.is-on { color: var(--fg-brand); border-bottom-color: var(--fg-brand); }
.mc-sheet-tab small { margin-left: 6px; font-size: 11px; color: var(--fg-ink-3); }

/* ---------- Excel 风格网格预览 ---------- */
.mc-grid-card { padding: 0; overflow: hidden; }
.mc-grid-tools { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap;
    padding: 13px 16px; border-bottom: 1px solid var(--fg-line); }
.mc-view-switch { display: inline-flex; padding: 3px; border-radius: 9px; background: var(--fg-surface-3); }
.mc-view-switch button { border: 0; background: transparent; cursor: pointer; padding: 5px 12px; border-radius: 7px;
    font-size: 12.5px; font-weight: 650; color: var(--fg-ink-3); }
.mc-view-switch button.is-on { background: var(--fg-surface); color: var(--fg-brand-ink); box-shadow: var(--fg-shadow); }
.mc-grid-legend { display: flex; gap: 12px; flex-wrap: wrap; font-size: 11.5px; color: var(--fg-ink-3); }
.mc-grid-legend span { display: inline-flex; align-items: center; gap: 5px; }
.mc-swatch { width: 12px; height: 12px; border-radius: 3px; display: inline-block; border: 1px solid var(--fg-line-2); }
.mc-swatch-header { background: var(--fg-brand-soft); }
.mc-swatch-filled { background: var(--fg-amber-soft); position: relative; }
.mc-grid-scroll { max-height: 520px; overflow: auto; overscroll-behavior: contain; }
.mc-sheet { border-collapse: separate; border-spacing: 0; font-size: 12.5px; min-width: 100%; }
.mc-sheet th, .mc-sheet td { border-right: 1px solid var(--fg-line); border-bottom: 1px solid var(--fg-line);
    padding: 6px 10px; text-align: left; vertical-align: top; white-space: pre-wrap; word-break: break-word;
    min-width: 96px; max-width: 280px; }
.mc-sheet thead th { position: sticky; top: 0; z-index: 2; background: var(--fg-surface-3); color: var(--fg-ink-3);
    font-family: var(--fg-mono); font-size: 11px; font-weight: 700; text-align: center; padding: 6px 8px; }
.mc-sheet thead th:first-child { left: 0; z-index: 3; }
.mc-sheet tbody th { position: sticky; left: 0; z-index: 1; background: var(--fg-surface-3); color: var(--fg-ink-3);
    font-family: var(--fg-mono); font-size: 11px; font-weight: 700; text-align: center; min-width: 44px; padding: 6px 8px; }
.mc-sheet tbody tr:hover td { background: var(--fg-surface-2); }
.mc-sheet td.is-header { background: var(--fg-brand-soft); color: var(--fg-brand-ink); font-weight: 650; }
.mc-sheet td.is-filled { background: var(--fg-amber-soft); }
.mc-sheet td.is-filled::after { content: ""; position: absolute; }
.mc-sheet td.is-empty-val { color: var(--fg-ink-3); font-style: italic; }
.mc-sheet td.mc-col-name { background: var(--fg-surface-2); }
.mc-grid-note { padding: 11px 16px; border-top: 1px solid var(--fg-line); font-size: 12px; color: var(--fg-ink-3); line-height: 1.7; }
.mc-columns { display: flex; flex-wrap: wrap; gap: 6px; padding: 12px 16px; border-bottom: 1px solid var(--fg-line); }
.mc-columns .fg-tag { font-family: var(--fg-mono); font-size: 11px; }

/* ---------- 合并清单 ---------- */
.mc-merges { display: grid; gap: 10px; }
.mc-merge { display: grid; grid-template-columns: 132px minmax(0, 1fr); gap: 16px; padding: 14px 16px; }
.mc-merge-ref { font-family: var(--fg-mono); font-size: 13px; font-weight: 750; color: var(--fg-brand-ink); }
.mc-merge-ref small { display: block; font-family: var(--fg-sans); font-size: 11px; font-weight: 500; color: var(--fg-ink-3); margin-top: 2px; }
.mc-merge-body { min-width: 0; }
.mc-merge-val { font-size: 13.5px; color: var(--fg-ink); margin-bottom: 7px; word-break: break-word; }
.mc-merge-meta { display: flex; flex-wrap: wrap; gap: 6px; }
.mc-cells { display: flex; flex-wrap: wrap; gap: 5px; margin-top: 9px; }
.mc-cells .fg-tag { font-family: var(--fg-mono); font-size: 10.5px; }

/* ---------- 三份 CSV 对照卡 ---------- */
.mc-export-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; margin-top: 16px; }
.mc-export { padding: 17px; border-top: 3px solid var(--fg-brand); }
.mc-export.is-normalized { border-top-color: #059669; }
.mc-export.is-merges { border-top-color: var(--fg-amber); }
.mc-export h3 { font-size: 14.5px; margin-bottom: 6px; }
.mc-export p { font-size: 12.5px; line-height: 1.75; color: var(--fg-ink-2); margin-bottom: 12px; min-height: 66px; }
.mc-export .mc-export-actions { display: flex; gap: 8px; flex-wrap: wrap; }

/* ---------- 批量汇总 ---------- */
.mc-batch { margin-top: 16px; padding: 16px; }
.mc-batch h3 { font-size: 14px; margin-bottom: 10px; }

/* ---------- 说明正文 ---------- */
.mc-prose { font-size: 14.5px; line-height: 1.95; color: var(--fg-ink-2); }
.mc-prose-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 26px 36px; }
.mc-prose h2 { font-size: 21px; margin-bottom: 12px; }
.mc-prose h3 { font-size: 15px; margin: 20px 0 7px; }
.mc-prose p { margin-bottom: 13px; max-width: 88ch; }
.mc-prose ul { padding-left: 21px; margin-bottom: 14px; }
.mc-prose li { margin-bottom: 7px; }
.mc-faq { border-top: 1px solid var(--fg-line); padding: 13px 0; }
.mc-faq:last-child { border-bottom: 1px solid var(--fg-line); }
.mc-faq h3 { margin: 0 0 5px; font-size: 14px; }
.mc-faq p { font-size: 13px; line-height: 1.85; margin: 0; }
.mc-footnote { padding: 18px 0 46px; font-size: 12px; color: var(--fg-ink-3); line-height: 1.8; }

@media (max-width: 980px) {
    .mc-strategies { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .mc-opts, .mc-export-grid, .mc-prose-grid { grid-template-columns: 1fr; }
    .mc-export p { min-height: 0; }
    .mc-hero-head { grid-template-columns: 1fr; }
}
@media (max-width: 720px) {
    .mc-strategies { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; }
    .mc-strategy { padding: 11px; }
    .mc-drop { padding: 16px; gap: 12px; }
    .mc-drop-ico { flex-basis: 42px; width: 42px; height: 42px; }
    .mc-merge { grid-template-columns: 1fr; gap: 8px; }
    .mc-grid-scroll { max-height: 400px; }
    .mc-flow-line { flex-basis: 12px; margin: 0 6px; }
    .mc-flow-step { font-size: 11.5px; }
}