.ppqpb-app {
    --ink: #061326;
    --muted: #50617f;
    --line: #d9e0ec;
    --soft: #f5f7fb;
    --panel: #ffffff;
    --brand: #183a78;
    --brand-2: #c9921b;
    --warm: #f3d99a;
    --green: #d8f8e5;
    --blue: #dfe8ff;
    --pink: #ffdce4;
    color: var(--ink);
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    line-height: 1.45;
    background: #f8fafc;
    min-height: 100vh;
    margin: 0;
}

.ppqpb-app * {
    box-sizing: border-box;
}

.ppqpb-app button,
.ppqpb-app input,
.ppqpb-app textarea,
.ppqpb-app select {
    font: inherit;
}

.ppqpb-topbar {
    position: sticky;
    top: 0;
    z-index: 30;
    display: grid;
    grid-template-columns: auto auto auto 1fr;
    gap: 18px;
    align-items: center;
    padding: 14px 18px;
    border-bottom: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.94);
    backdrop-filter: blur(12px);
}

.ppqpb-menu-toggle {
    display: none;
    align-items: center;
    justify-content: center;
    min-height: 40px;
    padding: 9px 14px;
    border: 1px solid var(--line);
    border-radius: 7px;
    color: var(--brand);
    background: #fff;
    cursor: pointer;
}

.ppqpb-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--brand);
    font-size: 24px;
    line-height: 1.05;
}

.ppqpb-brand strong {
    max-width: 145px;
}

.ppqpb-brand-icon {
    display: grid;
    place-items: center;
    width: 38px;
    height: 38px;
    border: 2px solid var(--brand);
    border-radius: 8px;
    color: var(--brand-2);
    transform: rotate(-12deg);
}

.ppqpb-stats {
    display: flex;
    gap: 7px;
    align-items: center;
    color: var(--muted);
}

.ppqpb-toolbar {
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: 10px;
    align-items: center;
}

.ppqpb-autosave {
    min-width: 150px;
    padding: 9px 14px;
    border: 1px solid var(--line);
    border-radius: 999px;
    color: var(--muted);
    background: #fff;
    text-align: center;
    font-size: 14px;
}

.ppqpb-btn,
.ppqpb-segment button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    gap: 8px;
    padding: 10px 16px;
    border: 1px solid var(--line);
    border-radius: 7px;
    color: var(--ink);
    background: #fff;
    cursor: pointer;
    transition: 0.18s ease;
}

.ppqpb-btn:hover,
.ppqpb-segment button:hover {
    border-color: #b8c4d6;
    box-shadow: 0 8px 22px rgba(12, 31, 63, 0.08);
}

.ppqpb-primary,
.ppqpb-segment button.is-active {
    border-color: var(--brand);
    color: #fff;
    background: var(--brand);
}

.ppqpb-segment {
    display: inline-flex;
    overflow: hidden;
    padding: 4px;
    border-radius: 8px;
    background: #edf0f5;
}

.ppqpb-segment button {
    min-height: 36px;
    border: 0;
    border-radius: 6px;
    background: transparent;
}

.ppqpb-segment button.is-active:nth-child(2) {
    color: #101419;
    background: var(--brand-2);
}

.ppqpb-muted {
    color: var(--muted);
}

.ppqpb-shell {
    display: grid;
    grid-template-columns: minmax(360px, 1fr) minmax(420px, 0.98fr);
    gap: 30px;
    padding: 22px 24px 34px;
}

.ppqpb-shell.is-edit {
    grid-template-columns: minmax(0, 980px);
}

.ppqpb-shell.is-edit .ppqpb-preview-wrap {
    display: none;
}

.ppqpb-shell.is-preview {
    grid-template-columns: minmax(0, 980px);
    justify-content: center;
}

.ppqpb-shell.is-preview .ppqpb-editor {
    display: none;
}

.ppqpb-notice {
    margin-bottom: 20px;
    padding: 15px 18px;
    border-radius: 8px;
    color: #315d96;
    background: var(--warm);
}

.ppqpb-panel {
    margin-bottom: 20px;
    padding: 26px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--panel);
}

.ppqpb-panel h2 {
    margin: 0 0 22px;
    font-size: 22px;
    letter-spacing: 0;
}

.ppqpb-section-title {
    display: flex;
    justify-content: space-between;
    gap: 14px;
    align-items: center;
    margin-bottom: 14px;
}

.ppqpb-section-title h2 {
    margin: 0;
}

.ppqpb-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.ppqpb-grid {
    display: grid;
    gap: 18px;
    margin-bottom: 18px;
}

.ppqpb-grid-2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.ppqpb-grid-3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.ppqpb-app label {
    display: grid;
    gap: 8px;
    color: var(--ink);
    font-weight: 500;
}

.ppqpb-app input,
.ppqpb-app textarea,
.ppqpb-app select {
    width: 100%;
    min-height: 50px;
    padding: 12px 15px;
    border: 1px solid var(--line);
    border-radius: 7px;
    color: var(--ink);
    background: #fff;
    outline: none;
}

.ppqpb-app textarea {
    resize: vertical;
    min-height: 92px;
}

.ppqpb-app input:focus,
.ppqpb-app textarea:focus,
.ppqpb-app select:focus {
    border-color: var(--brand);
    box-shadow: 0 0 0 3px rgba(24, 58, 120, 0.12);
}

.ppqpb-upload {
    position: relative;
    align-content: start;
}

.ppqpb-upload input {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.ppqpb-upload b {
    display: grid;
    place-items: center;
    width: 164px;
    min-height: 80px;
    border: 1px solid var(--line);
    border-radius: 7px;
    background: #fff;
    font-weight: 500;
    cursor: pointer;
}

.ppqpb-upload small {
    color: var(--muted);
}

.ppqpb-logo-preview img {
    max-width: 150px;
    max-height: 90px;
    object-fit: contain;
}

.ppqpb-type-picker {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
    max-width: 720px;
    margin: 0 0 18px auto;
    padding: 12px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: #fff;
    box-shadow: 0 14px 35px rgba(6, 19, 38, 0.12);
}

.ppqpb-type-option {
    display: grid;
    grid-template-columns: 44px 1fr;
    gap: 12px;
    align-items: center;
    padding: 10px;
    border: 0;
    border-radius: 8px;
    background: #fff;
    text-align: left;
    cursor: pointer;
}

.ppqpb-type-option:hover {
    background: var(--soft);
}

.ppqpb-type-option i {
    display: grid;
    place-items: center;
    width: 44px;
    height: 44px;
    border-radius: 8px;
    color: var(--brand);
    background: #e9edf4;
    font-style: normal;
}

.ppqpb-type-option b {
    display: block;
    font-weight: 600;
}

.ppqpb-type-option small {
    color: var(--muted);
}

.ppqpb-empty {
    display: grid;
    place-items: center;
    gap: 8px;
    min-height: 220px;
    border: 2px dashed #d7dfec;
    border-radius: 8px;
    color: var(--muted);
    text-align: center;
}

.ppqpb-item {
    display: grid;
    grid-template-columns: 28px 1fr;
    gap: 16px;
    padding: 24px 0;
    border-bottom: 1px solid var(--line);
}

.ppqpb-drag {
    color: var(--muted);
    user-select: none;
}

.ppqpb-item-head {
    display: grid;
    grid-template-columns: auto 1fr auto;
    gap: 12px;
    align-items: start;
}

.ppqpb-qnum {
    font-weight: 700;
    white-space: nowrap;
}

.ppqpb-badge {
    display: inline-flex;
    align-items: center;
    width: max-content;
    min-height: 30px;
    padding: 5px 14px;
    border-radius: 999px;
    color: #0f4fb2;
    background: var(--blue);
    font-size: 14px;
}

.ppqpb-badge.short { color: #078241; background: var(--green); }
.ppqpb-badge.long { color: #b26000; background: #fff1c7; }
.ppqpb-badge.image { color: #6f2a8e; background: #efe3f7; }
.ppqpb-badge.case { color: #c51f4b; background: var(--pink); }
.ppqpb-badge.match { color: #007d91; background: #d5f8fb; }
.ppqpb-badge.truefalse { color: #ba5a00; background: #ffead0; }

.ppqpb-marks {
    display: grid;
    grid-template-columns: auto 78px;
    gap: 10px;
    align-items: center;
    color: var(--muted);
}

.ppqpb-marks input {
    text-align: center;
}

.ppqpb-field-row {
    display: grid;
    grid-template-columns: minmax(220px, 1fr) auto auto;
    gap: 10px;
    align-items: start;
    margin: 8px 0 20px;
}

.ppqpb-icon-btn {
    width: 42px;
    min-width: 42px;
    min-height: 42px;
    padding: 0;
}

.ppqpb-lang {
    min-width: 36px;
    min-height: 42px;
    border: 0;
    background: transparent;
    color: var(--ink);
    cursor: pointer;
}

.ppqpb-row-actions {
    display: flex;
    gap: 8px;
    margin-top: 14px;
}

.ppqpb-inline-list {
    display: grid;
    gap: 10px;
}

.ppqpb-option-row,
.ppqpb-pair-row,
.ppqpb-statement-row,
.ppqpb-instruction-row {
    display: grid;
    grid-template-columns: 28px minmax(0, 1fr) auto auto auto;
    gap: 10px;
    align-items: center;
}

.ppqpb-pair-row {
    grid-template-columns: 28px minmax(0, 1fr) auto auto minmax(0, 1fr) auto auto auto;
}

.ppqpb-statement-row {
    grid-template-columns: 28px minmax(0, 1fr) auto auto auto auto;
}

.ppqpb-mini-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 18px;
    align-items: end;
    margin-top: 18px;
}

.ppqpb-mini-grid label {
    min-width: 140px;
}

.ppqpb-image-editor {
    display: grid;
    grid-template-columns: minmax(180px, 240px) minmax(180px, 1fr) minmax(140px, 180px);
    gap: 18px;
    align-items: end;
    margin-top: 18px;
}

.ppqpb-subtitle {
    margin: 22px 0 10px;
    color: var(--muted);
    font-weight: 600;
}

.ppqpb-section-item {
    grid-template-columns: 28px 1fr auto;
    padding: 14px;
    border-radius: 8px;
    border-bottom: 0;
    background: var(--warm);
}

.ppqpb-text-item,
.ppqpb-columns-item {
    padding: 18px;
    border: 1px solid var(--line);
    border-radius: 8px;
}

.ppqpb-column-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
}

.ppqpb-column-count {
    max-width: 180px;
    margin-bottom: 12px;
}

.ppqpb-subquestions {
    display: grid;
    gap: 12px;
    margin-top: 16px;
}

.ppqpb-sub-card {
    display: grid;
    gap: 10px;
    padding: 14px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: #fbfcff;
}

.ppqpb-sub-head {
    display: grid;
    grid-template-columns: 28px minmax(120px, 1fr) minmax(100px, 140px) auto;
    gap: 10px;
    align-items: center;
}

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

.ppqpb-preview-wrap {
    position: sticky;
    top: 92px;
    align-self: start;
    max-height: calc(100vh - 112px);
    overflow: auto;
    padding: 0 6px 20px;
}

.ppqpb-paper {
    width: min(100%, 920px);
    min-height: 980px;
    margin: 0 auto;
    padding: 44px 52px;
    background: #fff;
    color: #111827;
    box-shadow: 0 10px 34px rgba(6, 19, 38, 0.08);
    font-family: Georgia, "Times New Roman", serif;
}

.ppqpb-paper-header {
    display: grid;
    gap: 22px;
    border-bottom: 2px solid #d1d5db;
    padding-bottom: 14px;
}

.ppqpb-paper-main-title {
    display: grid;
    grid-template-columns: 96px minmax(0, 1fr) 96px;
    align-items: center;
    gap: 16px;
}

.ppqpb-paper-logo img {
    display: block;
    max-width: 88px;
    max-height: 78px;
    object-fit: contain;
}

.ppqpb-paper-title {
    text-align: center;
}

.ppqpb-paper-title h1 {
    margin: 0 0 8px;
    font-size: 26px;
    letter-spacing: 0;
    text-transform: uppercase;
}

.ppqpb-paper-title h2 {
    margin: 0 0 12px;
    font-size: 20px;
}

.ppqpb-paper-details {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 24px;
    align-items: start;
}

.ppqpb-paper-left-meta,
.ppqpb-paper-meta {
    font-size: 15px;
}

.ppqpb-paper-left-meta p,
.ppqpb-paper-meta p {
    margin: 3px 0;
}

.ppqpb-paper-meta {
    min-width: 160px;
}

.ppqpb-preview-instructions {
    margin: 16px 0 22px;
    padding: 16px;
    background: #f8f9fb;
}

.ppqpb-preview-instructions h3 {
    margin: 0 0 10px;
    font-size: 20px;
}

.ppqpb-preview-instructions ol {
    margin: 0;
    padding-left: 22px;
}

.ppqpb-preview-instructions li {
    margin: 8px 0;
}

.ppqpb-preview-question {
    margin: 18px 0;
    break-inside: avoid;
}

.ppqpb-preview-question-head {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 14px;
    font-weight: 700;
}

.ppqpb-preview-options,
.ppqpb-preview-statements {
    margin: 10px 0 0 24px;
}

.ppqpb-alpha {
    list-style-type: lower-alpha;
}

.ppqpb-preview-subquestions {
    margin: 10px 0 0 30px;
}

.ppqpb-preview-subquestions > li {
    margin: 10px 0;
}

.ppqpb-sub-marks {
    float: right;
    margin-left: 12px;
    white-space: nowrap;
}

.ppqpb-preview-answer-lines span {
    display: block;
    height: 22px;
    border-bottom: 1px solid #d1d5db;
}

.ppqpb-preview-passage {
    margin: 10px 0;
    padding: 12px;
    border: 1px solid #d1d5db;
}

.ppqpb-preview-image {
    margin: 14px 0 18px;
    text-align: center;
}

.ppqpb-preview-image img {
    max-width: 100%;
    height: auto;
    object-fit: contain;
}

.ppqpb-match-table {
    width: 100%;
    margin-top: 10px;
    border-collapse: collapse;
}

.ppqpb-match-table th,
.ppqpb-match-table td {
    padding: 7px 8px;
    border: 1px solid #d1d5db;
    text-align: left;
}

.ppqpb-preview-statements li {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 28px 28px;
    gap: 8px;
    align-items: start;
    margin: 8px 0;
}

.ppqpb-tf-box {
    display: inline-grid;
    place-items: center;
    width: 24px;
    height: 24px;
    border: 1px solid #111827;
    font-weight: 700;
}

.ppqpb-preview-section {
    margin: 22px 0 12px;
    padding: 10px 14px;
    background: #f3f4f6;
    text-align: center;
    font-weight: 700;
}

.ppqpb-preview-columns {
    display: grid;
    gap: 18px;
}

.ppqpb-preview-footer {
    margin-top: 28px;
    padding-top: 18px;
    border-top: 1px solid #d1d5db;
    color: #40506d;
    text-align: center;
}

.ppqpb-toast {
    position: fixed;
    right: 18px;
    bottom: 18px;
    z-index: 50;
    padding: 12px 16px;
    border-radius: 8px;
    color: #fff;
    background: var(--brand);
    box-shadow: 0 14px 34px rgba(6, 19, 38, 0.22);
}

@media (max-width: 1180px) {
    .ppqpb-topbar {
        grid-template-columns: 1fr;
    }

    .ppqpb-toolbar {
        justify-content: flex-start;
    }

    .ppqpb-shell {
        grid-template-columns: 1fr;
    }

    .ppqpb-preview-wrap {
        position: static;
        max-height: none;
    }
}

@media (max-width: 720px) {
    .ppqpb-shell {
        padding-left: 12px;
        padding-right: 12px;
    }

    .ppqpb-topbar {
        grid-template-columns: minmax(0, 1fr) auto;
        gap: 10px;
        padding: 10px 12px;
    }

    .ppqpb-brand {
        min-width: 0;
        font-size: 19px;
    }

    .ppqpb-brand-icon {
        width: 34px;
        height: 34px;
        font-size: 12px;
    }

    .ppqpb-stats {
        grid-column: 1 / -1;
        font-size: 13px;
    }

    .ppqpb-menu-toggle {
        display: inline-flex;
    }

    .ppqpb-toolbar {
        display: none;
        grid-column: 1 / -1;
        align-items: stretch;
        width: 100%;
        padding: 12px;
        border: 1px solid var(--line);
        border-radius: 8px;
        background: #fff;
        box-shadow: 0 14px 28px rgba(6, 19, 38, 0.12);
    }

    .ppqpb-app.is-menu-open .ppqpb-toolbar {
        display: flex;
    }

    .ppqpb-panel {
        padding: 18px;
    }

    .ppqpb-grid-2,
    .ppqpb-grid-3,
    .ppqpb-type-picker,
    .ppqpb-item-head,
    .ppqpb-field-row,
    .ppqpb-image-editor,
    .ppqpb-option-row,
    .ppqpb-pair-row,
    .ppqpb-statement-row,
    .ppqpb-instruction-row,
    .ppqpb-sub-head,
    .ppqpb-sub-options,
    .ppqpb-paper-header {
        grid-template-columns: 1fr;
    }

    .ppqpb-item {
        grid-template-columns: 1fr;
    }

    .ppqpb-toolbar,
    .ppqpb-actions,
    .ppqpb-section-title {
        align-items: stretch;
        flex-direction: column;
    }

    .ppqpb-btn,
    .ppqpb-segment,
    .ppqpb-segment button {
        width: 100%;
    }

    .ppqpb-paper {
        padding: 28px 20px;
        min-height: 720px;
    }

    .ppqpb-paper-main-title,
    .ppqpb-paper-details {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .ppqpb-paper-logo img {
        margin: 0 auto;
    }

    .ppqpb-paper-title,
    .ppqpb-paper-left-meta,
    .ppqpb-paper-meta {
        text-align: center;
    }
}

@media print {
    @page {
        size: A4;
        margin: 14mm 12mm;
    }

    body * {
        visibility: hidden;
    }

    .ppqpb-paper,
    .ppqpb-paper * {
        visibility: visible;
    }

    .ppqpb-paper {
        position: absolute;
        left: 0;
        top: 0;
        width: 100%;
        min-height: 0;
        padding: 0;
        box-shadow: none;
    }
}