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

        .stack-app { background: var(--card-background); }
        .stack-app footer { color: inherit; }

        .stack-app .mc-layout {
            display: flex;
            gap: 20px;
            margin-top: 20px;
            min-height: 600px;
        }

        /* ---- 左侧仓库 ---- */
        .stack-app .mc-warehouse {
            flex: 0 0 220px;
            background: var(--card-background);
            border-radius: var(--card-border-radius);
            padding: 16px;
            display: flex;
            flex-direction: column;
            border: 1px solid var(--card-separator-color);
        }
        .stack-app .mc-warehouse h3 {
            color: inherit;
            font-size: 14px;
            margin-bottom: 10px;
        }
        .stack-app .mc-warehouse-list {
            flex: 1;
            overflow-y: auto;
            list-style: none;
            margin-bottom: 10px;
        }
        .stack-app .mc-warehouse-list li {
            padding: 8px 12px;
            margin-bottom: 4px;
            background: var(--card-background);
            border-radius: var(--card-border-radius);
            color: inherit;
            cursor: pointer;
            font-family: 'Courier New', monospace;
            font-size: 14px;
            transition: background 0.15s;
            border: 1px solid var(--card-separator-color);
        }
        .stack-app .mc-warehouse-list li:hover {
            background: var(--card-background);
        }
        .stack-app .mc-warehouse-list li.active {
            background: var(--card-background);
            border-left: 1px solid var(--card-separator-color);
            border-color: var(--card-separator-color);
        }
        .stack-app .btn-primary {
            padding: 10px;
            background: var(--card-background);
            color: inherit;
            border: none;
            border-radius: var(--card-border-radius);
            font-weight: bold;
            cursor: pointer;
            font-size: 14px;
            transition: background 0.15s;
        }
        .stack-app .btn-primary:hover { background: var(--card-background); }

        /* ---- 右侧主面板 ---- */
        .stack-app .mc-main {
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        /* 显示偏好 */
        .stack-app .mc-mode {
            display: flex;
            gap: 16px;
            align-items: center;
            background: var(--card-background);
            border-radius: var(--card-border-radius);
            padding: 12px 16px;
            border: 1px solid var(--card-separator-color);
        }
        .stack-app .mc-mode label {
            color: inherit;
            font-size: 13px;
            cursor: pointer;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .stack-app .mc-mode input[type="radio"] {
            accent-color: #4a90d9;
        }

        /* 运算区 */
        .stack-app .mc-section {
            background: var(--card-background);
            border-radius: var(--card-border-radius);
            padding: 16px;
            border: 1px solid var(--card-separator-color);
        }
        .stack-app .mc-section h4 {
            color: inherit;
            font-size: 13px;
            margin-bottom: 10px;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

        .stack-app .mc-op-row {
            display: flex;
            gap: 10px;
            align-items: center;
            flex-wrap: wrap;
        }
        .stack-app .mc-op-row select {
            padding: 6px 10px;
            background: var(--card-background);
            color: inherit;
            border: 1px solid var(--card-separator-color);
            border-radius: var(--card-border-radius);
            font-size: 14px;
        }
        .stack-app .mc-op-row select:focus { outline: none; border-color: var(--card-separator-color); }

        .stack-app .btn-op {
            padding: 8px 16px;
            background: var(--card-background);
            color: inherit;
            border: none;
            border-radius: var(--card-border-radius);
            cursor: pointer;
            font-size: 13px;
            font-weight: 600;
            transition: background 0.15s;
        }
        .stack-app .btn-op:hover { background: var(--card-background); }
        .stack-app .btn-op.accent { background: var(--card-background); color: inherit; }
        .stack-app .btn-op.accent:hover { background: var(--card-background); }
        .stack-app .btn-op.green { background: var(--card-background); color: inherit; }
        .stack-app .btn-op.green:hover { background: var(--card-background); }
        .stack-app .btn-op.red { background: var(--card-background); color: inherit; }
        .stack-app .btn-op.red:hover { background: var(--card-background); }

        /* 结果显示 */
        .stack-app .mc-result {
            background: var(--card-background);
            border-radius: var(--card-border-radius);
            padding: 16px;
            min-height: 120px;
            border: 1px solid var(--card-separator-color);
        }
        .stack-app .mc-result h4 {
            color: inherit;
            font-size: 13px;
            margin-bottom: 10px;
        }
        .stack-app .mc-result-content {
            min-height: 60px;
            display: flex;
            align-items: center;
            justify-content: center;
            overflow-x: auto;
            padding: 10px;
        }
        .stack-app .mc-result-content .katex { font-size: 1.15em; }
        .stack-app .mc-result-content .katex .mathnormal { color: #333; }
        .stack-app .mc-error {
            color: var(--stack-danger);
            font-size: 14px;
            text-align: center;
        }

        /* 保存 */
        .stack-app .mc-save {
            display: flex;
            gap: 10px;
            align-items: center;
        }
        .stack-app .mc-save label {
            color: inherit;
        }
        .stack-app .mc-save input {
            padding: 8px 12px;
            background: var(--card-background);
            color: inherit;
            border: 1px solid var(--card-separator-color);
            border-radius: var(--card-border-radius);
            font-size: 14px;
            width: 120px;
        }
        .stack-app .mc-save input:focus { outline: none; border-color: var(--card-separator-color); }

        /* ---- 模态框 ---- */
        .stack-app .modal-overlay {
            display: none;
            position: fixed;
            top: 0; left: 0; right: 0; bottom: 0;
            background: var(--card-background);
            z-index: 1000;
            justify-content: center;
            align-items: center;
        }
        .stack-app .modal-overlay.show { display: flex; }

        .stack-app .modal {
            background: var(--card-background);
            border-radius: var(--card-border-radius);
            padding: 24px;
            width: 560px;
            max-width: 94vw;
            max-height: 90vh;
            overflow-y: auto;
            box-shadow: var(--shadow-l1);
            border: 1px solid var(--card-separator-color);
        }
        .stack-app .modal h3 {
            color: inherit;
            margin-bottom: 16px;
        }

        .stack-app .modal-top {
            display: flex;
            gap: 10px;
            align-items: center;
            flex-wrap: wrap;
            margin-bottom: 12px;
        }
        .stack-app .modal-top label {
            color: inherit;
            font-size: 13px;
        }
        .stack-app .modal-top input,
.stack-app .modal-top select {
            padding: 6px 10px;
            background: var(--card-background);
            color: inherit;
            border: 1px solid var(--card-separator-color);
            border-radius: var(--card-border-radius);
            font-size: 14px;
            width: 60px;
            text-align: center;
        }
        .stack-app .modal-top input:focus,
.stack-app .modal-top select:focus {
            outline: none;
            border-color: var(--card-separator-color);
        }
        .stack-app .modal-top input[type="text"] { width: 70px; }

        .stack-app .matrix-grid-wrap {
            overflow-x: auto;
            margin-bottom: 12px;
        }
        .stack-app .matrix-grid {
            border-collapse: collapse;
            margin: 0 auto;
        }
        .stack-app .matrix-grid td {
            padding: 2px;
        }
        .stack-app .matrix-grid input {
            width: 60px;
            padding: 6px 4px;
            background: var(--card-background);
            color: inherit;
            border: 1px solid var(--card-separator-color);
            border-radius: var(--card-border-radius);
            text-align: center;
            font-size: 14px;
        }
        .stack-app .matrix-grid input:focus {
            outline: none;
            border-color: var(--card-separator-color);
        }

        .stack-app .modal-btns {
            display: flex;
            gap: 10px;
            margin-top: 12px;
        }
        .stack-app .btn-secondary {
            padding: 10px 20px;
            background: var(--card-background);
            color: inherit;
            border: none;
            border-radius: var(--card-border-radius);
            cursor: pointer;
            font-weight: bold;
            font-size: 14px;
        }
        .stack-app .btn-secondary:hover { background: var(--card-background); }
        .stack-app .btn-save {
            padding: 10px 20px;
            background: var(--card-background);
            color: inherit;
            border: none;
            border-radius: var(--card-border-radius);
            cursor: pointer;
            font-weight: bold;
            font-size: 14px;
        }
        .stack-app .btn-save:hover { background: var(--card-background); }

        /* 解标签 */
        .stack-app .dec-label {
            display: inline-block;
            color: inherit;
            font-weight: bold;
            margin-right: 8px;
            font-size: 14px;
        }

        @media (max-width: 768px) {
            .stack-app .mc-layout { flex-direction: column; }
            .stack-app .mc-warehouse { flex: none; }
            .stack-app .mc-op-row { flex-wrap: wrap; }
            .stack-app .modal { width: 100%; }
        }
    

        .stack-app {
            --lab-ink: var(--card-text-color-main);
            --lab-muted: var(--card-text-color-secondary);
            --lab-line: var(--card-separator-color);
            --lab-soft: #eef2f6;
            --lab-paper: var(--card-background);
            --lab-blue: #165dff;
            --lab-blue-dark: #0c3fb4;
            --lab-green: #087f5b;
            --lab-orange: #f26a2e;
            --lab-red: #c9364f;
            --lab-shadow: 6px 6px 0 #102033;
        }
        .stack-app {
            min-width: 320px;
            background:
                var(--card-background);
            background-size: 24px 24px;
            color: inherit;
        }
        .stack-app .global-nav { border-bottom: 1px solid var(--card-separator-color); background: var(--card-background); }
        .stack-app .tool-hero {
            padding: 54px 20px 72px;
            border-bottom: 1px solid var(--card-separator-color);
            background: var(--card-background);
            text-align: left;
        }
        .stack-app .tool-hero-inner { width: min(1240px, 100%); margin: 0 auto; }
        .stack-app .tool-kicker,
.stack-app .panel-index,
.stack-app .field-label,
.stack-app .section-code,
.stack-app .status-code {
            font-family: "Cascadia Code", "SFMono-Regular", Consolas, monospace;
            letter-spacing: 0.12em;
            text-transform: uppercase;
        }
        .stack-app .tool-kicker {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 14px;
            color: inherit;
            font-size: 12px;
            font-weight: 800;
        }
        .stack-app .tool-kicker::before { width: 28px; height: 3px; background: var(--card-background); content: ""; }
        .stack-app .tool-hero h1 {
            margin: 0;
            color: inherit;
            font-family: var(--base-font-family);
            font-size: clamp(38px, 7vw, 72px);
            line-height: 0.98;
            letter-spacing: -0.04em;
        }
        .stack-app .tool-hero p {
            max-width: 760px;
            margin: 18px 0 0;
            color: inherit;
            font-size: 16px;
            line-height: 1.8;
        }
        .stack-app .hero-status { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 22px; }
        .stack-app .hero-status span {
            padding: 6px 9px;
            border: 1px solid var(--card-separator-color);
            background: var(--card-background);
            color: inherit;
            font-family: "Cascadia Code", Consolas, monospace;
            font-size: 11px;
            font-weight: 700;
        }
        .stack-app .matrix-shell {
            width: min(1240px, calc(100% - 32px));
            max-width: none;
            margin: -38px auto 72px;
            padding: 0;
        }
        .stack-app .mc-layout {
            display: grid;
            grid-template-columns: 250px minmax(0, 1fr);
            gap: 0;
            min-height: 650px;
            margin-top: 0;
            border: 1px solid var(--card-separator-color);
            background: var(--card-background);
            box-shadow: var(--shadow-l1);
        }
        .stack-app .mc-warehouse {
            display: flex;
            min-width: 0;
            padding: 0;
            border: 0;
            border-right: 1px solid var(--card-separator-color);
            border-radius: var(--card-border-radius);
            background: var(--card-background);
            color: inherit;
        }
        .stack-app .warehouse-head { padding: 22px 18px 16px; border-bottom: 1px solid var(--card-separator-color); }
        .stack-app .warehouse-head .panel-index { color: inherit; font-size: 10px; font-weight: 800; }
        .stack-app .warehouse-head h2 { margin: 7px 0 0; color: inherit; font-size: 18px; }
        .stack-app .warehouse-head p { margin: 7px 0 0; color: inherit; font-size: 11px; line-height: 1.6; }
        .stack-app .mc-warehouse-list {
            flex: 1;
            min-height: 280px;
            margin: 0;
            padding: 12px;
            overflow-y: auto;
        }
        .stack-app .mc-warehouse-list li { margin: 0 0 7px; padding: 0; border: 0; border-radius: var(--card-border-radius); background: transparent; }
        .stack-app .matrix-item {
            display: flex;
            width: 100%;
            align-items: center;
            justify-content: space-between;
            gap: 8px;
            padding: 11px 12px;
            border: 1px solid var(--card-separator-color);
            background: var(--card-background);
            color: inherit;
            font-family: "Cascadia Code", Consolas, monospace;
            text-align: left;
            cursor: pointer;
        }
        .stack-app .matrix-item:hover { border-color: var(--card-separator-color); background: var(--card-background); }
        .stack-app .matrix-item.active { border-color: var(--card-separator-color); background: var(--card-background); color: inherit; }
        .stack-app .matrix-item small { color: inherit; font-size: 9px; }
        .stack-app .matrix-item.active small { color: inherit; }
        .stack-app .btn-primary {
            margin: 12px;
            padding: 12px;
            border: 1px solid var(--card-separator-color);
            border-radius: var(--card-border-radius);
            background: var(--card-background);
            color: inherit;
            font-family: "Cascadia Code", Consolas, monospace;
            font-size: 11px;
            font-weight: 800;
        }
        .stack-app .btn-primary:hover { background: var(--card-background); }
        .stack-app .mc-main { display: flex; min-width: 0; gap: 0; background: var(--card-background); }
        .stack-app .workspace-topline {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 14px 18px;
            border-bottom: 1px solid var(--card-separator-color);
            background: var(--card-background);
        }
        .stack-app .dependency-state { display: flex; align-items: center; gap: 8px; color: inherit; font-size: 11px; }
        .stack-app .dependency-state::before { width: 8px; height: 8px; background: var(--card-background); content: ""; }
        .stack-app .dependency-state.error::before { background: var(--card-background); }
        .stack-app .status-code { color: inherit; font-size: 10px; font-weight: 800; }
        .stack-app .mc-mode {
            display: inline-flex;
            gap: 0;
            padding: 0;
            border: 1px solid var(--card-separator-color);
            border-radius: var(--card-border-radius);
            background: var(--card-background);
        }
        .stack-app .mc-mode label {
            min-height: 34px;
            padding: 8px 11px;
            border-right: 1px solid var(--card-separator-color);
            color: inherit;
            font-family: "Cascadia Code", Consolas, monospace;
            font-size: 10px;
        }
        .stack-app .mc-mode label:last-child { border-right: 0; }
        .stack-app .mc-mode label:has(input:checked) { background: var(--card-background); color: inherit; }
        .stack-app .mc-mode input { position: absolute; width: 1px; height: 1px; opacity: 0; }
        .stack-app .workspace-body { display: flex; flex: 1; min-width: 0; flex-direction: column; gap: 16px; padding: 18px; }
        .stack-app .operation-grid { display: grid; grid-template-columns: 1.12fr 0.88fr; gap: 16px; }
        .stack-app .mc-section {
            padding: 0;
            border: 1px solid var(--card-separator-color);
            border-radius: var(--card-border-radius);
            background: var(--card-background);
        }
        .stack-app .section-head {
            display: flex;
            align-items: flex-start;
            justify-content: space-between;
            gap: 14px;
            padding: 15px 16px;
            border-bottom: 1px solid var(--card-separator-color);
        }
        .stack-app .section-head h3 { margin: 4px 0 0; color: inherit; font-size: 15px; }
        .stack-app .section-code { color: inherit; font-size: 9px; font-weight: 800; }
        .stack-app .section-head p { max-width: 240px; color: inherit; font-size: 10px; line-height: 1.6; text-align: right; }
        .stack-app .section-body { padding: 16px; }
        .stack-app .selector-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; margin-bottom: 14px; }
        .stack-app .selector-field { display: flex; min-width: 0; flex-direction: column; gap: 6px; }
        .stack-app .field-label { color: inherit; font-size: 9px; font-weight: 800; }
        .stack-app .mc-op-row { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; }
        .stack-app .mc-op-row.decomp { grid-template-columns: repeat(3, minmax(0, 1fr)); }
        .stack-app .mc-op-row select,
.stack-app .mc-save input {
            width: 100%;
            min-height: 42px;
            padding: 9px 11px;
            border: 1px solid var(--card-separator-color);
            border-radius: var(--card-border-radius);
            background: var(--card-background);
            color: inherit;
            font-family: "Cascadia Code", Consolas, monospace;
            font-size: 13px;
        }
        .stack-app .mc-op-row select:focus,
.stack-app .mc-save input:focus { border-color: var(--card-separator-color); outline: 3px solid rgba(22, 93, 255, 0.14); }
        .stack-app .btn-op,
.stack-app .btn-secondary,
.stack-app .btn-save,
.stack-app .utility-btn {
            min-height: 40px;
            padding: 9px 12px;
            border: 1px solid var(--card-separator-color);
            border-radius: var(--card-border-radius);
            background: var(--card-background);
            color: inherit;
            font-family: "Cascadia Code", Consolas, monospace;
            font-size: 11px;
            font-weight: 800;
            cursor: pointer;
            transition: transform 0.12s, box-shadow 0.12s;
        }
        .stack-app .btn-op:hover,
.stack-app .btn-secondary:hover,
.stack-app .btn-save:hover,
.stack-app .utility-btn:hover {
            transform: translate(-2px, -2px);
            box-shadow: var(--shadow-l1);
        }
        .stack-app .btn-op:active,
.stack-app .btn-secondary:active,
.stack-app .btn-save:active,
.stack-app .utility-btn:active { transform: none; box-shadow: none; }
        .stack-app .btn-op.accent { background: var(--card-background); color: inherit; }
        .stack-app .btn-op.green { background: var(--card-background); color: inherit; }
        .stack-app .mc-result {
            min-height: 250px;
            padding: 0;
            border: 1px solid var(--card-separator-color);
            border-radius: var(--card-border-radius);
            background: var(--card-background);
        }
        .stack-app .result-head {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            padding: 13px 16px;
            border-bottom: 1px solid var(--card-separator-color);
            background: var(--card-background);
            color: inherit;
        }
        .stack-app .result-head h3 { margin: 0; color: inherit; font-size: 13px; }
        .stack-app .result-head .utility-btn { min-height: 30px; padding: 5px 9px; border-color: var(--card-separator-color); background: transparent; color: inherit; }
        .stack-app .mc-result-content {
            min-height: 190px;
            padding: 24px;
            background:
                var(--card-background);
            background-size: 100% 30px;
        }
        .stack-app .mc-result-content .katex { color: var(--lab-ink); font-size: 1.15em; }
        .stack-app .mc-error { color: var(--stack-danger); font-size: 13px; font-weight: 700; }
        .stack-app .numeric-note { width: 100%; margin-top: 12px; color: inherit; font-size: 11px; text-align: center; }
        .stack-app .mc-save {
            display: grid;
            grid-template-columns: minmax(180px, 1fr) 180px auto;
            gap: 10px;
            align-items: end;
            padding: 14px 16px;
            border: 1px solid var(--card-separator-color);
            background: var(--card-background);
        }
        .stack-app .mc-save label { color: inherit; font-size: 11px; line-height: 1.5; }
        .stack-app .save-field { display: flex; min-width: 0; flex-direction: column; gap: 6px; }
        .stack-app .modal-overlay { padding: 20px; background: var(--card-background); }
        .stack-app .modal {
            width: min(760px, 96vw);
            max-height: 92vh;
            padding: 0;
            border: 1px solid var(--card-separator-color);
            border-radius: var(--card-border-radius);
            background: var(--card-background);
            box-shadow: var(--shadow-l1);
        }
        .stack-app .modal-header { padding: 18px 20px; border-bottom: 1px solid var(--card-separator-color); }
        .stack-app .modal-header h3 { margin: 5px 0 0; color: inherit; font-size: 20px; }
        .stack-app .modal-body { padding: 18px 20px; }
        .stack-app .modal-top { display: grid; grid-template-columns: 1.4fr 0.7fr 0.7fr auto; gap: 10px; align-items: end; }
        .stack-app .modal-top label { display: flex; flex-direction: column; gap: 6px; color: inherit; font-size: 10px; }
        .stack-app .modal-top input {
            width: 100% !important;
            min-height: 40px;
            padding: 8px 10px;
            border: 1px solid var(--card-separator-color);
            border-radius: var(--card-border-radius);
            background: var(--card-background);
            color: inherit;
            font-family: "Cascadia Code", Consolas, monospace;
        }
        .stack-app .matrix-grid-wrap { margin: 16px 0 0; padding: 14px; border: 1px solid var(--card-separator-color); background: var(--card-background); }
        .stack-app .matrix-grid input {
            width: 66px;
            min-height: 38px;
            border: 1px solid var(--card-separator-color);
            border-radius: var(--card-border-radius);
            font-family: "Cascadia Code", Consolas, monospace;
        }
        .stack-app .matrix-grid input:focus { border-color: var(--card-separator-color); outline: 2px solid rgba(22, 93, 255, 0.16); }
        .stack-app .modal-feedback { min-height: 20px; margin-top: 10px; color: inherit; font-size: 11px; font-weight: 700; }
        .stack-app .modal-btns { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; }
        .stack-app .btn-save { background: var(--card-background); color: inherit; }
        .stack-app footer { color: inherit; }
        @media (max-width: 900px) {
            .stack-app .matrix-shell { width: min(100% - 24px, 760px); }
            .stack-app .mc-layout { grid-template-columns: 1fr; }
            .stack-app .mc-warehouse { min-height: 0; border-right: 0; border-bottom: 1px solid var(--card-separator-color); }
            .stack-app .mc-warehouse-list { display: flex; min-height: 0; gap: 8px; padding-bottom: 4px; overflow-x: auto; }
            .stack-app .mc-warehouse-list li { min-width: 130px; }
            .stack-app .operation-grid { grid-template-columns: 1fr; }
        }
        @media (max-width: 620px) {
            .stack-app .tool-hero { padding: 42px 18px 64px; }
            .stack-app .tool-hero h1 { font-size: 42px; }
            .stack-app .hero-status { display: none; }
            .stack-app .matrix-shell { margin-top: -28px; }
            .stack-app .workspace-topline { align-items: flex-start; flex-direction: column; }
            .stack-app .mc-mode { width: 100%; }
            .stack-app .mc-mode label { flex: 1; justify-content: center; }
            .stack-app .workspace-body { padding: 12px; }
            .stack-app .section-head { flex-direction: column; }
            .stack-app .section-head p { text-align: left; }
            .stack-app .mc-op-row.decomp { grid-template-columns: repeat(2, minmax(0, 1fr)); }
            .stack-app .mc-save { grid-template-columns: 1fr; align-items: stretch; }
            .stack-app .modal-top { grid-template-columns: repeat(2, minmax(0, 1fr)); }
            .stack-app .modal-top .name-field { grid-column: 1 / -1; }
            .stack-app .modal-top .btn-secondary { grid-column: 1 / -1; }
            .stack-app .matrix-grid input { width: 56px; }
        }
        @media (prefers-reduced-motion: reduce) {
            .stack-app *,
.stack-app *::before,
.stack-app *::after { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }
        }