/* ==========================================================================
   办公用品与耗材采购预算计算器 /tool/office-supplies-budget-calc
   视觉主题：牛皮纸台账 —— 牛皮纸棕 + 印泥红 + 燕麦米 + 衬线标题
   深浅双主题；深色模式跟随导航栏 #themeToggle，页面内不另设切换开关
   ========================================================================== */

.osb-page {
    /* ---- 浅色（默认） ---- */
    --osb-bg: #f3ecdd;
    --osb-bg-2: #ebe1cc;
    --osb-card: #fffdf6;
    --osb-card-2: #f7f1e2;
    --osb-ink: #3a2c18;
    --osb-ink-2: #6b5a3e;
    --osb-ink-3: #9c8b6c;
    --osb-line: #ddd2b8;
    --osb-line-2: #e9e0cb;
    --osb-brown: #7a4a21;
    --osb-brown-2: #96622f;
    --osb-brown-soft: #f0e3cf;
    --osb-red: #b03024;
    --osb-red-soft: #f8e6e0;
    --osb-green: #3c6e46;
    --osb-green-soft: #e6efe4;
    --osb-blue: #4a5f77;
    --osb-blue-soft: #e7ecf1;
    --osb-shadow: 0 16px 36px rgba(58, 44, 24, .14);
    --osb-shadow-sm: 0 5px 16px rgba(58, 44, 24, .09);
    --osb-radius: 14px;
    --osb-mono: "JetBrains Mono", "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
    --osb-serif: "Noto Serif SC", "Songti SC", SimSun, serif;
}

:root[data-theme="dark"] .osb-page {
    /* ---- 深色 ---- */
    --osb-bg: #16100a;
    --osb-bg-2: #1d150c;
    --osb-card: #241a10;
    --osb-card-2: #2c2114;
    --osb-ink: #f0e6d4;
    --osb-ink-2: #c4b294;
    --osb-ink-3: #96856a;
    --osb-line: #3d2f1c;
    --osb-line-2: #332717;
    --osb-brown: #d3a065;
    --osb-brown-2: #e0b47e;
    --osb-brown-soft: #2e2113;
    --osb-red: #e0837a;
    --osb-red-soft: #331c17;
    --osb-green: #85bd8f;
    --osb-green-soft: #1b2a1d;
    --osb-blue: #92a7c0;
    --osb-blue-soft: #1d2530;
    --osb-shadow: 0 16px 40px rgba(0, 0, 0, .5);
    --osb-shadow-sm: 0 5px 16px rgba(0, 0, 0, .38);
}

.osb-page {
    color: var(--osb-ink);
    font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    line-height: 1.75;
    font-variant-numeric: tabular-nums;
    padding: 26px 26px 30px;
    margin-top: 22px;
    background:
        repeating-linear-gradient(90deg, transparent 0 119px, rgba(122, 74, 33, .05) 119px 120px),
        linear-gradient(180deg, var(--osb-bg-2), var(--osb-bg));
    border: 1px solid var(--osb-line);
    border-radius: var(--osb-radius);
    box-shadow: var(--osb-shadow);
}

.osb-page * { box-sizing: border-box; }

.osb-page h1,
.osb-page h2,
.osb-page h3 { margin: 0; line-height: 1.4; letter-spacing: .4px; }
.osb-page h1 { font-family: var(--osb-serif); font-size: 30px; font-weight: 700; color: var(--osb-brown); }
.osb-page h2 { font-family: var(--osb-serif); font-size: 20px; font-weight: 700; color: var(--osb-ink); }
.osb-page h3 { font-size: 15px; font-weight: 700; color: var(--osb-ink); }

/* ===================== 首屏 ===================== */
.osb-hero { margin-bottom: 20px; }

.osb-kicker {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 2px;
    color: var(--osb-red);
    background: var(--osb-red-soft);
    border: 1px solid var(--osb-line);
    border-radius: 4px;
    padding: 3px 12px;
    margin-bottom: 12px;
}

.osb-lead {
    margin: 10px 0 14px;
    font-size: 15px;
    color: var(--osb-ink-2);
    max-width: 62ch;
    line-height: 1.85;
}
.osb-lead b { color: var(--osb-brown); font-weight: 700; }

.osb-tags { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 6px; }
.osb-tags li {
    font-size: 12px;
    color: var(--osb-ink-2);
    background: var(--osb-card);
    border: 1px solid var(--osb-line);
    border-radius: 4px;
    padding: 3px 11px;
}

/* ===================== 预算速览卡 ===================== */
.osb-overview {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
    margin-bottom: 18px;
}
.osb-ov-card {
    background: var(--osb-card);
    border: 1px solid var(--osb-line);
    border-radius: 10px;
    padding: 14px 16px;
    display: flex;
    flex-direction: column;
    gap: 2px;
    position: relative;
    box-shadow: var(--osb-shadow-sm);
}
.osb-ov-card::after {
    content: "";
    position: absolute;
    top: 10px;
    right: 12px;
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--osb-line);
}
.osb-ov-card.is-main::after { background: var(--osb-red); }
.osb-ov-label { font-size: 12px; color: var(--osb-ink-3); }
.osb-ov-val { font-family: var(--osb-mono); font-size: 26px; font-weight: 700; color: var(--osb-ink); line-height: 1.25; }
.osb-ov-card.is-main .osb-ov-val { color: var(--osb-red); font-size: 30px; }
.osb-ov-unit { font-size: 11px; color: var(--osb-ink-3); }

/* ===================== 预置示例 ===================== */
.osb-presets { display: flex; align-items: center; flex-wrap: wrap; gap: 8px; margin-bottom: 16px; }
.osb-presets-label { font-size: 12px; font-weight: 700; letter-spacing: 1px; color: var(--osb-ink-3); }
.osb-presets button {
    font: inherit;
    font-size: 13px;
    color: var(--osb-brown);
    background: var(--osb-card);
    border: 1px solid var(--osb-line);
    border-radius: 4px;
    padding: 5px 14px;
    cursor: pointer;
    transition: all .15s ease;
}
.osb-presets button:hover { border-color: var(--osb-brown); background: var(--osb-brown-soft); }

/* ===================== 校验条 ===================== */
.osb-errbar {
    border-radius: 8px;
    border: 1px solid var(--osb-red);
    background: var(--osb-red-soft);
    color: var(--osb-red);
    font-size: 13px;
    line-height: 1.7;
    padding: 10px 14px;
    margin-bottom: 16px;
}
.osb-errbar.is-warn { border-color: var(--osb-brown-2); background: var(--osb-brown-soft); color: var(--osb-brown); }
.osb-errbar ul { margin: 0; padding-left: 18px; }

/* ===================== 面板 ===================== */
.osb-panel {
    background: var(--osb-card);
    border: 1px solid var(--osb-line);
    border-radius: 12px;
    padding: 22px 24px;
    margin-bottom: 18px;
    box-shadow: var(--osb-shadow-sm);
}
.osb-panel-head { margin-bottom: 16px; }
.osb-pk {
    display: inline-block;
    font-size: 11px;
    font-weight: 800;
    letter-spacing: 3px;
    color: var(--osb-card);
    background: var(--osb-brown);
    border-radius: 4px;
    padding: 2px 10px;
    margin-bottom: 8px;
}
.osb-panel-head h2 { margin-bottom: 4px; }
.osb-panel-head p { margin: 0; font-size: 13px; color: var(--osb-ink-2); }

/* ===================== 表单 ===================== */
.osb-grid { display: grid; gap: 12px; }
.osb-grid--5 { grid-template-columns: repeat(5, 1fr); }
.osb-field { display: flex; flex-direction: column; gap: 5px; }
.osb-label { font-size: 13px; font-weight: 600; color: var(--osb-ink-2); }
.osb-unit { font-size: 11px; font-weight: 400; color: var(--osb-ink-3); }
.osb-input {
    font: inherit;
    font-size: 14px;
    color: var(--osb-ink);
    background: var(--osb-card-2);
    border: 1px solid var(--osb-line);
    border-radius: 8px;
    padding: 8px 12px;
    width: 100%;
    outline: none;
    transition: border-color .15s ease;
}
.osb-input:focus { border-color: var(--osb-brown); }
.osb-mono { font-family: var(--osb-mono); }
.osb-select {
    font: inherit;
    font-size: 14px;
    color: var(--osb-ink);
    background: var(--osb-card-2);
    border: 1px solid var(--osb-line);
    border-radius: 8px;
    padding: 8px 12px;
    width: 100%;
    outline: none;
}

/* ===================== 台账表 ===================== */
.osb-table-wrap { overflow-x: auto; border: 1px solid var(--osb-line); border-radius: 10px; }
.osb-table { width: 100%; border-collapse: collapse; font-size: 13px; min-width: 860px; }
.osb-table th, .osb-table td { padding: 8px 10px; text-align: left; border-bottom: 1px solid var(--osb-line-2); white-space: nowrap; }
.osb-table th {
    font-size: 12px;
    color: var(--osb-ink-3);
    background: var(--osb-card-2);
    font-weight: 700;
}
.osb-table td { color: var(--osb-ink); }
.osb-table .osb-mono { font-family: var(--osb-mono); }
.osb-table tbody tr:hover { background: var(--osb-card-2); }
.osb-table tbody tr:last-child td { border-bottom: none; }
.osb-table tfoot td {
    background: var(--osb-brown-soft);
    font-weight: 700;
    border-top: 2px solid var(--osb-brown);
    border-bottom: none;
}
.osb-op { white-space: nowrap; }

.osb-table .osb-input, .osb-table .osb-select {
    font-size: 13px;
    padding: 5px 8px;
    border-radius: 6px;
    background: var(--osb-card);
}
.osb-table .cell-name { min-width: 150px; }
.osb-table .cell-num { width: 88px; }
.osb-table td.is-calc { font-family: var(--osb-mono); color: var(--osb-ink-2); }
.osb-table td.is-buy { font-family: var(--osb-mono); font-weight: 700; color: var(--osb-brown); }
.osb-table td.is-buy.is-zero { color: var(--osb-ink-3); font-weight: 400; }

.osb-del {
    width: 22px;
    height: 22px;
    border-radius: 4px;
    border: none;
    background: var(--osb-red-soft);
    color: var(--osb-red);
    font-size: 12px;
    font-weight: 800;
    cursor: pointer;
}
.osb-del:hover { background: var(--osb-red); color: #fff; }
.osb-table .empty-row td { text-align: center; color: var(--osb-ink-3); padding: 18px 0; }

.osb-item-bar { display: flex; align-items: center; gap: 14px; margin-top: 12px; flex-wrap: wrap; }
.osb-mini-btn {
    font: inherit;
    font-size: 12px;
    font-weight: 700;
    color: var(--osb-brown);
    background: var(--osb-brown-soft);
    border: 1px dashed var(--osb-brown);
    border-radius: 999px;
    padding: 4px 13px;
    cursor: pointer;
    transition: all .15s ease;
}
.osb-mini-btn:hover { background: var(--osb-brown); color: var(--osb-card); }
.osb-item-sum { font-size: 13px; color: var(--osb-ink-2); }
.osb-item-sum b { font-family: var(--osb-mono); color: var(--osb-red); }

/* ===================== 策略清单 ===================== */
.osb-facts { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 12px; }
.osb-fact {
    background: var(--osb-card-2);
    border: 1px solid var(--osb-line-2);
    border-radius: 10px;
    padding: 12px 14px;
    font-size: 13px;
    line-height: 1.75;
    color: var(--osb-ink-2);
}
.osb-fact b { color: var(--osb-brown); font-family: var(--osb-mono); }
.osb-fact.is-tip { border-left: 3px solid var(--osb-red); }
.osb-fact.is-save { border-left: 3px solid var(--osb-green); }
.osb-fact.is-save b { color: var(--osb-green); }

/* ===================== 按钮 ===================== */
.osb-btn {
    font: inherit;
    font-size: 14px;
    font-weight: 700;
    color: var(--osb-ink);
    background: var(--osb-card);
    border: 1px solid var(--osb-line);
    border-radius: 8px;
    padding: 9px 18px;
    cursor: pointer;
    transition: all .15s ease;
}
.osb-btn:hover { border-color: var(--osb-brown); color: var(--osb-brown); }
.osb-btn--primary { background: var(--osb-brown); border-color: var(--osb-brown); color: var(--osb-card); }
.osb-btn--primary:hover { background: var(--osb-brown-2); border-color: var(--osb-brown-2); color: var(--osb-card); }
.osb-btn--ghost { background: transparent; }
.osb-btn:disabled { opacity: .55; cursor: not-allowed; }

.osb-scheme-bar { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 14px; }
.osb-scheme-bar .osb-input { max-width: 240px; }
.osb-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 16px; }

/* ===================== CSV 预览 ===================== */
.osb-pre {
    margin: 0;
    background: var(--osb-card-2);
    border: 1px solid var(--osb-line-2);
    border-radius: 10px;
    padding: 14px 16px;
    font-family: var(--osb-mono);
    font-size: 12.5px;
    line-height: 1.8;
    color: var(--osb-ink-2);
    white-space: pre-wrap;
    word-break: break-all;
    max-height: 380px;
    overflow: auto;
}

/* ===================== FAQ ===================== */
.osb-faq { display: flex; flex-direction: column; gap: 10px; }
.osb-faq-item {
    background: var(--osb-card-2);
    border: 1px solid var(--osb-line-2);
    border-radius: 10px;
    overflow: hidden;
}
.osb-faq-item summary {
    cursor: pointer;
    font-size: 14px;
    font-weight: 700;
    color: var(--osb-ink);
    padding: 12px 16px;
    list-style: none;
    position: relative;
    padding-right: 40px;
}
.osb-faq-item summary::-webkit-details-marker { display: none; }
.osb-faq-item summary::after {
    content: "+";
    position: absolute;
    right: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--osb-red);
    font-size: 18px;
    font-weight: 800;
}
.osb-faq-item[open] summary::after { content: "−"; }
.osb-faq-a { padding: 0 16px 14px; font-size: 13px; line-height: 1.9; color: var(--osb-ink-2); }
.osb-faq-a b { color: var(--osb-brown); }

/* ===================== 留言板 ===================== */
.osb-comments { margin-bottom: 20px; }

/* ===================== A4 采购单（仅打印可见） ===================== */
.osb-sheet { display: none; }

/* ===================== Toast ===================== */
.osb-toast {
    position: fixed;
    left: 50%;
    bottom: 32px;
    transform: translateX(-50%) translateY(16px);
    background: rgba(58, 44, 24, .95);
    color: #fff;
    font-size: 14px;
    padding: 10px 20px;
    border-radius: 8px;
    opacity: 0;
    pointer-events: none;
    transition: all .3s ease;
    z-index: 9999;
    max-width: 86vw;
}
.osb-toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ===================== 响应式 ===================== */
@media (max-width: 1080px) {
    .osb-grid--5 { grid-template-columns: repeat(3, 1fr); }
    .osb-overview { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 960px) {
    .osb-page { padding: 20px 16px 24px; }
    .osb-page h1 { font-size: 24px; }
}
@media (max-width: 620px) {
    .osb-grid--5 { grid-template-columns: 1fr 1fr; }
    .osb-overview { grid-template-columns: 1fr; }
}

/* ===================== 打印样式：A4 采购预算单 ===================== */
@media print {
    body > *:not(.detail-wrap) { display: none !important; }
    .detail-wrap .container > *:not(.osb-sheet) { display: none !important; }
    .osb-sheet {
        display: block !important;
        color: #000;
        font-size: 12px;
        line-height: 1.8;
    }
    .osb-sheet h1 { font-family: var(--osb-serif); font-size: 20px; color: #000; margin: 0 0 4px; }
    .osb-sheet .osb-sheet-meta { font-size: 11px; color: #444; margin-bottom: 14px; }
    .osb-sheet table { width: 100%; border-collapse: collapse; margin-bottom: 14px; }
    .osb-sheet th, .osb-sheet td { border: 1px solid #999; padding: 5px 8px; text-align: left; }
    .osb-sheet th { background: #eee; }
    .osb-sheet .osb-sheet-sign { margin-top: 26px; display: flex; gap: 60px; color: #333; }
    .osb-toast, .osb-comments, .osb-errbar { display: none !important; }
}