:root {
    --mkg-bg: #eef2f7;
    --mkg-panel: #ffffff;
    --mkg-line: #dbe3ee;
    --mkg-line-strong: #c7d3e2;
    --mkg-text: #1f2937;
    --mkg-muted: #526072;
    --mkg-primary: #1d4ed8;
    --mkg-primary-dark: #1e40af;
    --mkg-secondary: #0f766e;
    --mkg-print: #111827;
    --mkg-page-width: 210mm;
    --mkg-page-height: 297mm;
    --mkg-page-padding-inline: 10mm;
    --mkg-page-padding-top: 10mm;
    --mkg-page-padding-bottom: 6mm;
    --mkg-page-padding: var(--mkg-page-padding-top) var(--mkg-page-padding-inline) var(--mkg-page-padding-bottom);
    --mkg-content-width: calc(var(--mkg-page-width) - (var(--mkg-page-padding-inline) * 2));
    --mkg-page-gap: 18px;
    --mkg-preview-scale: 1;
    --mkg-sheet-title-size: 16pt;
    --mkg-sheet-copy-size: 10.5pt;
    --mkg-sheet-footer-size: 6pt;
    --mkg-sheet-section-gap: 4mm;
    --mkg-sheet-footer-gap: 0mm;
    --mkg-sheet-footer-min-height: 0mm;
    --mkg-sheet-footer-reserve: 2.2mm;
    --mkg-sheet-footer-offset: 0.3mm;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    height: 100%;
    -webkit-text-size-adjust: 100%;
}

.mkg-body {
    margin: 0;
    height: 100vh;
    min-height: 100vh;
    font-family: "Nunito", sans-serif;
    background: var(--mkg-bg);
    color: var(--mkg-text);
    display: grid;
    grid-template-rows: auto minmax(0, 1fr);
    overflow: hidden;
}

.mkg-topbar {
    display: flex;
    gap: 16px;
    align-items: center;
    padding: 20px 24px 14px;
}

.mkg-home-link {
    text-decoration: none;
    background: #ffffff;
    border: 2px solid var(--mkg-line);
    color: var(--mkg-primary);
    font-weight: 800;
    border-radius: 12px;
    min-height: 52px;
    min-width: 130px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0 18px;
}

.mkg-home-link:focus-visible,
.mkg-btn:focus-visible,
select:focus-visible,
input:focus-visible {
    outline: 3px solid #93c5fd;
    outline-offset: 2px;
}

.mkg-topbar-text h1 {
    margin: 0;
    font-size: clamp(1.3rem, 2.5vw, 2rem);
}

.mkg-topbar-text p {
    margin: 6px 0 0;
    color: var(--mkg-muted);
    font-weight: 700;
}

.mkg-layout {
    display: grid;
    grid-template-columns: minmax(320px, 420px) 1fr;
    gap: 18px;
    padding: 0 20px 20px;
    align-items: stretch;
    min-height: 0;
    height: 100%;
    overflow: hidden;
}

.mkg-controls {
    background: var(--mkg-panel);
    border: 1px solid var(--mkg-line);
    border-radius: 16px;
    padding: 18px;
    align-self: stretch;
    min-height: 0;
    overflow: auto;
}

.mkg-field {
    margin-bottom: 14px;
}

.mkg-generation-settings {
    margin-bottom: 14px;
}

.mkg-generation-box {
    margin-bottom: 14px;
    padding: 14px;
    border: 1px solid var(--mkg-line);
    border-radius: 14px;
    background: linear-gradient(180deg, #ffffff 0%, #f8fbff 100%);
}

.mkg-generation-box:last-child {
    margin-bottom: 0;
}

.mkg-generation-box h3 {
    margin: 0 0 10px;
    font-size: 0.98rem;
    color: #1e293b;
}

.mkg-pack-note {
    margin: 0 0 12px;
    font-size: 0.92rem;
    line-height: 1.45;
    color: var(--mkg-muted);
    font-weight: 700;
}

.mkg-layout-guidance {
    margin: 14px 0 10px;
}

.mkg-guidance-card {
    padding: 12px 14px;
    border: 1px solid #d8e4f3;
    border-radius: 14px;
    background: linear-gradient(180deg, #ffffff 0%, #f6faff 100%);
}

.mkg-guidance-title {
    margin: 0 0 6px;
    font-size: 0.95rem;
    color: #1e293b;
    font-weight: 800;
}

.mkg-guidance-primary,
.mkg-guidance-secondary {
    margin: 0;
    font-size: 0.9rem;
    line-height: 1.45;
    color: var(--mkg-muted);
    font-weight: 700;
}

.mkg-guidance-secondary {
    margin-top: 6px;
}

.mkg-field label {
    display: block;
    font-weight: 800;
    margin-bottom: 6px;
    color: #1e293b;
}

.mkg-field input,
.mkg-field select {
    width: 100%;
    min-height: 52px;
    border: 2px solid var(--mkg-line);
    border-radius: 12px;
    padding: 0 12px;
    font-size: 1rem;
    font-family: inherit;
    color: #0f172a;
    background: #ffffff;
}

.mkg-field-help {
    margin: 6px 2px 0;
    font-size: 0.88rem;
    line-height: 1.45;
    color: var(--mkg-muted);
    font-weight: 700;
}

.mkg-topic-mode-note {
    margin: 0 0 14px;
    padding: 10px 12px;
    border-radius: 12px;
    background: #f8fbff;
    border: 1px solid #d7e6f7;
    font-size: 0.9rem;
    line-height: 1.45;
    color: #516273;
    font-weight: 700;
}

.mkg-checkbox-wrap {
    display: flex;
    align-items: center;
    gap: 10px;
    min-height: 52px;
    border: 2px solid var(--mkg-line);
    border-radius: 12px;
    padding: 8px 12px;
    background: #ffffff;
}

.mkg-checkbox-wrap input[type="checkbox"] {
    width: 24px;
    height: 24px;
    margin: 0;
}

.mkg-checkbox-wrap span {
    font-weight: 700;
}

.mkg-actions {
    display: grid;
    gap: 10px;
    margin-top: 10px;
}

.mkg-presets {
    margin: 16px 0 8px;
    padding: 14px;
    border: 1px solid var(--mkg-line);
    border-radius: 14px;
    background: linear-gradient(180deg, #f8fbff 0%, #eef6ff 100%);
}

.mkg-preset-head {
    display: flex;
    justify-content: space-between;
    gap: 10px;
    align-items: baseline;
    margin-bottom: 10px;
    font-weight: 800;
    color: #1e293b;
}

.mkg-preset-head small {
    color: var(--mkg-muted);
    font-weight: 700;
}

.mkg-preset-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
}

.mkg-preset-btn {
    min-height: 42px;
    border: 1px solid #bfd1ea;
    border-radius: 999px;
    background: #ffffff;
    color: #1d4ed8;
    font: inherit;
    font-weight: 800;
    cursor: pointer;
    padding: 0 12px;
}

.mkg-preset-btn.is-active {
    background: #1d4ed8;
    border-color: #1d4ed8;
    color: #ffffff;
}

.mkg-btn {
    border: none;
    border-radius: 12px;
    min-height: 56px;
    font-family: inherit;
    font-size: 1.05rem;
    font-weight: 800;
    cursor: pointer;
}

.mkg-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.mkg-btn-primary {
    background: var(--mkg-primary);
    color: #ffffff;
}

.mkg-btn-primary:hover {
    background: var(--mkg-primary-dark);
}

.mkg-btn-secondary {
    background: #0f766e;
    color: #ffffff;
}

.mkg-btn-print {
    background: var(--mkg-print);
    color: #ffffff;
}

.mkg-status {
    min-height: 22px;
    margin: 12px 2px 2px;
    font-weight: 700;
    color: var(--mkg-muted);
}

.mkg-preview-panel {
    background: var(--mkg-panel);
    border: 1px solid var(--mkg-line);
    border-radius: 16px;
    padding: 12px;
    min-width: 0;
    min-height: 0;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.mkg-preview-tools {
    font-weight: 800;
    color: #334155;
    margin: 4px 4px 10px;
}

.mkg-preview-root {
    --mkg-preview-scale: 1;
    overflow: auto;
    padding: 6px 4px 14px;
    min-height: 0;
    flex: 1 1 auto;
}

.mkg-page-stack {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--mkg-page-gap);
    min-width: calc(var(--mkg-page-width) * var(--mkg-preview-scale));
}

.mkg-page-frame {
    width: calc(var(--mkg-page-width) * var(--mkg-preview-scale));
    height: calc(var(--mkg-page-height) * var(--mkg-preview-scale));
    flex: 0 0 auto;
}

.mkg-sheet {
    width: var(--mkg-page-width);
    height: var(--mkg-page-height);
    background: #ffffff;
    border: 1px solid var(--mkg-line-strong);
    box-shadow: 0 14px 30px rgba(15, 23, 42, 0.12);
    color: #111827;
    transform: scale(var(--mkg-preview-scale));
    transform-origin: top left;
}

.mkg-sheet-page {
    position: relative;
    height: 100%;
    padding: var(--mkg-page-padding);
    overflow: hidden;
}

.mkg-sheet-main {
    min-height: 0;
    display: flex;
    flex-direction: column;
    gap: var(--mkg-sheet-section-gap);
    width: var(--mkg-content-width);
    height: 100%;
    padding-bottom: var(--mkg-sheet-footer-reserve);
}

.mkg-sheet-placeholder .mkg-sheet-page {
    display: grid;
    place-content: center;
    text-align: center;
    gap: 10px;
}

.mkg-sheet-placeholder h2,
.mkg-sheet-placeholder p {
    margin: 0;
}

.mkg-sheet-header {
    display: flex;
    flex-direction: column;
    gap: 2.4mm;
}

.mkg-sheet-header h2 {
    margin: 0;
    text-align: center;
    font-size: var(--mkg-sheet-title-size);
    line-height: 1.2;
}

.mkg-sheet-header--answer h2 {
    text-align: left;
}

.mkg-sheet-kicker {
    margin: 0;
    font-size: 9pt;
    line-height: 1.35;
    font-weight: 800;
    color: #1d4ed8;
    letter-spacing: 0.02em;
    text-transform: uppercase;
}

.mkg-meta-line {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    flex-wrap: wrap;
    font-size: var(--mkg-sheet-copy-size);
    line-height: 1.35;
    font-weight: 700;
}

.mkg-meta-line--teacher {
    margin-top: 1mm;
}

.mkg-meta-line--pack {
    color: #334155;
}

.mkg-instruction {
    margin: 0;
    font-size: var(--mkg-sheet-copy-size);
    line-height: 1.4;
    font-weight: 700;
}

.mkg-answer-source {
    margin: -1mm 0 0;
    font-size: var(--mkg-sheet-copy-size);
    line-height: 1.35;
    font-weight: 700;
    color: var(--mkg-muted);
}

.mkg-question-grid {
    display: flex;
    flex-direction: column;
    gap: 3mm;
}

.mkg-question {
    border-bottom: 1px dashed #d1d5db;
    padding-bottom: 2mm;
    min-height: 9mm;
    display: flex;
    align-items: flex-start;
    gap: 8px;
}

.mkg-question-number {
    font-weight: 800;
    min-width: 8mm;
}

.mkg-question-text {
    font-size: var(--mkg-sheet-copy-size);
    font-weight: 700;
    line-height: 1.35;
}

.mkg-question-operation {
    min-height: 29mm;
    align-items: flex-start;
}

.mkg-op-stack {
    --mkg-op-width: 4ch;
    width: calc(var(--mkg-op-width) + 2ch);
    font-family: "Courier New", Courier, monospace;
    font-size: 12pt;
    font-weight: 700;
    line-height: 1.16;
    font-variant-numeric: tabular-nums lining-nums;
}

.mkg-op-row {
    display: grid;
    grid-template-columns: 1.2ch var(--mkg-op-width);
    align-items: baseline;
    justify-content: end;
    column-gap: 0.15ch;
}

.mkg-op-sign {
    text-align: center;
}

.mkg-op-value {
    text-align: right;
    white-space: nowrap;
}

.mkg-op-answer-line {
    border-top: 2px solid #1f2937;
    margin-top: 1px;
    height: 10px;
}

.mkg-answer-grid {
    display: flex;
    flex-direction: column;
    gap: 3mm;
}

.mkg-answer-row {
    display: grid;
    grid-template-columns: repeat(var(--mkg-answer-cols, 2), minmax(0, 1fr));
    gap: 4mm;
}

.mkg-answer-cell {
    border: 1px solid var(--mkg-line-strong);
    border-radius: 10px;
    min-height: 11mm;
    padding: 2.4mm 2.8mm;
    background: #ffffff;
}

.mkg-answer-cell-empty {
    border-color: transparent;
    background: transparent;
}

.mkg-answer-item {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 2mm;
    align-items: start;
    font-size: 10pt;
    line-height: 1.35;
    font-weight: 700;
}

.mkg-answer-number {
    white-space: nowrap;
}

.mkg-sheet-footer {
    position: absolute;
    left: 50%;
    bottom: var(--mkg-sheet-footer-offset);
    transform: translateX(-50%);
    width: var(--mkg-content-width);
    min-height: var(--mkg-sheet-footer-min-height);
    padding-top: 0;
    text-align: center;
    font-size: var(--mkg-sheet-footer-size);
    font-weight: 600;
    line-height: 1;
    color: #64748b;
    letter-spacing: 0.02em;
    background: transparent;
    pointer-events: none;
}

.mkg-measure-root {
    position: absolute;
    left: -99999px;
    top: 0;
    visibility: hidden;
    pointer-events: none;
}

.mkg-measure-root .mkg-sheet {
    transform: none !important;
    box-shadow: none !important;
}

@media (max-width: 1080px) {
    .mkg-body {
        height: auto;
        overflow: auto;
        grid-template-rows: auto auto;
    }

    .mkg-layout {
        grid-template-columns: 1fr;
        height: auto;
        overflow: visible;
    }

    .mkg-controls {
        overflow: visible;
    }

    .mkg-preview-panel {
        overflow: visible;
    }

    .mkg-preview-root {
        flex: none;
    }
}

@media (max-width: 700px) {
    .mkg-topbar {
        flex-direction: column;
        align-items: flex-start;
        padding: 14px 12px 8px;
    }

    .mkg-layout {
        padding: 0 10px 14px;
    }

    .mkg-preview-panel {
        padding: 10px;
    }

    .mkg-page-stack {
        gap: 12px;
    }

    .mkg-preset-grid {
        grid-template-columns: 1fr;
    }
}