/*!
 * 口算练习生成 —— 可打印口算题卡（1-6 年级）
 * 与站点其它工具页保持一致，含专门的打印样式，完整适配黑夜模式。
 */

.oa-wrap { max-width: 100%; }

/* ---------------- 配置面板 ---------------- */
.oa-panel {
    padding: 14px 16px;
    border: 1px solid var(--c-border, #eef1f6);
    border-radius: 16px;
    background: var(--c-bg-card, #fff);
    margin-bottom: 14px;
}

.oa-row {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 8px 0;
}

.oa-row + .oa-row { border-top: 1px dashed var(--c-border, #eef1f6); }

.oa-row-label {
    flex: 0 0 62px;
    padding-top: 6px;
    font-size: 13px;
    font-weight: 700;
    color: var(--c-text-muted, #94a3b8);
}

.oa-row-body { flex: 1 1 auto; display: flex; flex-wrap: wrap; gap: 7px; }

.oa-chip {
    padding: 6px 12px;
    font-size: 13px;
    font-weight: 600;
    color: var(--c-text-sub, #475569);
    background: var(--c-surface-soft, #f1f5f9);
    border: 1px solid transparent;
    border-radius: 9px;
    cursor: pointer;
    transition: all .15s;
}

.oa-chip:hover { border-color: var(--c-primary, #0066ff); color: var(--c-primary, #0066ff); }

.oa-chip.is-active {
    color: #fff;
    background: var(--c-primary, #0066ff);
    border-color: var(--c-primary, #0066ff);
}

.oa-chip--type.is-active { background: #1c7ed6; border-color: #1c7ed6; }
.oa-chip--all { font-size: 12px; padding: 6px 10px; opacity: .85; }

.oa-count-custom {
    width: 84px;
    height: 34px;
    padding: 0 10px;
    font-size: 13px;
    color: var(--c-text, #0f172a);
    background: var(--c-surface-soft, #f7f9fc);
    border: 1px solid var(--c-border, #e2e8f0);
    border-radius: 9px;
    outline: none;
}

.oa-count-custom:focus { border-color: var(--c-primary, #0066ff); }
.oa-count-unit { align-self: center; font-size: 12.5px; color: var(--c-text-muted, #94a3b8); }

/* ---------------- 操作按钮 ---------------- */
.oa-actions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 9px;
    margin-bottom: 14px;
}

.oa-btn {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    height: 38px;
    padding: 0 14px;
    font-size: 13.5px;
    font-weight: 700;
    color: #fff;
    background: var(--c-primary, #0066ff);
    border: 0;
    border-radius: 10px;
    cursor: pointer;
    transition: opacity .15s, transform .15s;
}

.oa-btn:hover { opacity: .9; transform: translateY(-1px); }

.oa-btn--ghost {
    color: var(--c-text-sub, #475569);
    background: var(--c-surface-soft, #f1f5f9);
    border: 1px solid var(--c-border, #e2e8f0);
}

.oa-btn--ghost:hover { border-color: var(--c-primary, #0066ff); color: var(--c-primary, #0066ff); }
.oa-btn--ghost.is-active { color: #fff; background: #f59f00; border-color: #f59f00; }
.oa-btn--print { background: #1c7ed6; }

.oa-spacer { flex: 1 1 auto; }

.oa-meta { font-size: 12.5px; color: var(--c-text-muted, #94a3b8); }
.oa-meta b { color: var(--c-primary, #0066ff); font-variant-numeric: tabular-nums; }

/* ---------------- 题卡 ---------------- */
.oa-sheet {
    padding: 20px 22px 24px;
    border: 1px solid var(--c-border, #eef1f6);
    border-radius: 16px;
    background: var(--c-bg-card, #fff);
}

.oa-sheet-head { margin-bottom: 16px; text-align: center; }

.oa-sheet-title {
    font-size: 19px;
    font-weight: 800;
    color: var(--c-text, #0f172a);
    margin-bottom: 8px;
}

.oa-sheet-info {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 18px;
    font-size: 12.5px;
    color: var(--c-text-sub, #475569);
}

.oa-sheet-info i {
    display: inline-block;
    min-width: 56px;
    margin-left: 4px;
    border-bottom: 1px solid var(--c-text-muted, #94a3b8);
}

.oa-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 10px 14px;
}

.oa-item {
    display: flex;
    align-items: center;
    gap: 5px;
    padding: 7px 8px;
    font-size: 15px;
    border-radius: 8px;
    border: 1px solid transparent;
}

.oa-no {
    flex: 0 0 auto;
    min-width: 22px;
    font-size: 11.5px;
    color: var(--c-text-muted, #94a3b8);
    font-variant-numeric: tabular-nums;
}

.oa-q {
    flex: 1 1 auto;
    color: var(--c-text, #0f172a);
    font-family: "Cambria Math", "Times New Roman", Georgia, serif;
    white-space: nowrap;
}

.oa-eq { flex: 0 0 auto; color: var(--c-text-muted, #94a3b8); }

.oa-blank {
    flex: 0 0 auto;
    display: inline-block;
    width: 46px;
    height: 1px;
    margin: 0 2px;
    border-bottom: 1.5px solid var(--c-text-muted, #94a3b8);
}

.oa-ans {
    flex: 0 0 auto;
    min-width: 40px;
    font-weight: 800;
    color: #c92a2a;
    font-family: "Cambria Math", "Times New Roman", Georgia, serif;
}

.oa-input {
    flex: 0 0 auto;
    width: 58px;
    height: 28px;
    padding: 0 6px;
    font-size: 14px;
    font-weight: 700;
    text-align: center;
    color: var(--c-primary, #0066ff);
    background: var(--c-surface-soft, #f7f9fc);
    border: 1px solid var(--c-border, #e2e8f0);
    border-radius: 6px;
    outline: none;
}

.oa-input:focus { border-color: var(--c-primary, #0066ff); box-shadow: 0 0 0 2px rgba(0, 102, 255, .12); }
.oa-input:disabled { color: var(--c-text-sub, #475569); background: transparent; }

.oa-mark {
    flex: 0 0 auto;
    font-size: 12px;
    font-weight: 800;
    white-space: nowrap;
}

.oa-mark.is-ok { color: #2f9e44; }
.oa-mark.is-bad { color: #c92a2a; }

.oa-item.is-right { background: rgba(47, 158, 68, .08); }
.oa-item.is-wrong { background: rgba(201, 42, 42, .08); }

/* ---------------- 批改结果 ---------------- */
.oa-summary {
    margin-top: 16px;
    padding: 14px 16px;
    text-align: center;
    border: 1px solid var(--c-border, #eef1f6);
    border-radius: 12px;
    background: var(--c-surface-soft, #f7f9fc);
}

.oa-sum-main { font-size: 16px; font-weight: 700; color: var(--c-text, #0f172a); }
.oa-sum-main b { color: var(--c-primary, #0066ff); font-size: 20px; }
.oa-sum-sub { margin-top: 4px; font-size: 12.5px; color: var(--c-text-muted, #94a3b8); }

/* ---------------- 空状态 / 提示 ---------------- */
.oa-empty {
    padding: 46px 16px;
    text-align: center;
    color: var(--c-text-muted, #94a3b8);
}

.oa-empty .emoji { font-size: 38px; margin-bottom: 10px; }
.oa-empty p { font-size: 13.5px; line-height: 1.7; }

.oa-tips {
    margin-top: 14px;
    font-size: 12.5px;
    line-height: 1.9;
    color: var(--c-text-muted, #94a3b8);
}

.oa-tips b { color: var(--c-text-sub, #475569); }

/* ---------------- 响应式 ---------------- */
@media (max-width: 900px) {
    .oa-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (max-width: 640px) {
    .oa-panel { padding: 12px; }
    .oa-row { flex-direction: column; gap: 6px; }
    .oa-row-label { padding-top: 0; }
    .oa-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px 10px; }
    .oa-sheet { padding: 14px 12px 18px; }
    .oa-item { font-size: 14px; }
    .oa-q { white-space: normal; }
}

/* ---------------- 黑夜模式 ---------------- */
[data-theme="dark"] .oa-panel,
[data-theme="dark"] .oa-sheet {
    background: var(--c-bg-card, #131c31);
    border-color: rgba(255, 255, 255, .08);
}

[data-theme="dark"] .oa-chip,
[data-theme="dark"] .oa-btn--ghost {
    color: var(--c-text-sub, #9ca3af);
    background: rgba(255, 255, 255, .04);
    border-color: rgba(255, 255, 255, .12);
}

[data-theme="dark"] .oa-chip:hover,
[data-theme="dark"] .oa-btn--ghost:hover { color: #58bdf0; border-color: #58bdf0; }

[data-theme="dark"] .oa-chip.is-active,
[data-theme="dark"] .oa-btn--ghost.is-active { color: #fff; }

[data-theme="dark"] .oa-count-custom {
    background: rgba(255, 255, 255, .04);
    border-color: rgba(255, 255, 255, .12);
    color: var(--c-text, #e5e7eb);
}

[data-theme="dark"] .oa-input {
    color: #58bdf0;
    background: rgba(255, 255, 255, .04);
    border-color: rgba(255, 255, 255, .14);
}

[data-theme="dark"] .oa-ans { color: #ff8787; }
[data-theme="dark"] .oa-mark.is-ok { color: #4ede78; }
[data-theme="dark"] .oa-mark.is-bad { color: #ff8787; }
[data-theme="dark"] .oa-summary { background: rgba(255, 255, 255, .04); border-color: rgba(255, 255, 255, .1); }
[data-theme="dark"] .oa-sum-main b { color: #58bdf0; }

/* ======================================================================
 *  打印样式：只保留题卡，四列排版，自动分页
 * ==================================================================== */
@page { margin: 12mm 10mm; }

@media print {
    /* 隐藏站点框架与所有交互元素 */
    body > * { display: none !important; }
    body > .detail-wrap { display: block !important; }

    .evade-fab, .evade-modal, .evade-toast, .evade-banner,
    .theme-toggle, .nav-header, .nav-mask, .footer, .back-to-top,
    .detail-breadcrumb, .detail-tabs, .tab-panel,
    .calc-info, .calc-disclaim, .related,
    .oa-panel, .oa-actions, .oa-tips, .oa-summary {
        display: none !important;
    }

    html, body {
        background: #fff !important;
        color: #000 !important;
    }

    body { padding: 0 !important; }

    .detail-wrap { padding: 0 !important; }
    .detail-wrap .container { max-width: 100% !important; padding: 0 !important; }

    .oa-sheet {
        border: 0 !important;
        border-radius: 0 !important;
        padding: 0 !important;
        background: #fff !important;
        box-shadow: none !important;
    }

    .oa-sheet-title { color: #000 !important; font-size: 17pt; }
    .oa-sheet-info { color: #333 !important; font-size: 10pt; }
    .oa-sheet-info i { border-bottom-color: #000 !important; }

    .oa-grid {
        grid-template-columns: repeat(4, minmax(0, 1fr)) !important;
        gap: 9pt 12pt !important;
    }

    .oa-item {
        padding: 2pt 0 !important;
        font-size: 12pt !important;
        border: 0 !important;
        background: transparent !important;
        break-inside: avoid;
        page-break-inside: avoid;
    }

    .oa-no { color: #666 !important; font-size: 9pt !important; }
    .oa-q { color: #000 !important; }
    .oa-eq { color: #000 !important; }
    .oa-blank { border-bottom-color: #000 !important; width: 34pt !important; }
    .oa-ans { color: #000 !important; }
    .oa-input { display: none !important; }
    .oa-mark { color: #c00 !important; }

    .oa-empty { display: none !important; }
}