/* ==========================================================================
   血压单位换算 · 独立界面设计（基于 desk3 底座）
   设计要点：
   - 主色取血压计的殷红，配合分级色带（绿→黄→橙→红）做「读数落在哪一段」的直观表达
   - 首屏左工具右结果：读数换算 / 单值换算 / 批量换算 三模式同屏切换
   - 数字统一等宽 + tabular-nums，标尺与游标用极简线条，避免花哨阴影
   类名前缀 bpc-，不污染其他页面
   ========================================================================== */

:root {
    --bpc-normal: #2f8a5c;
    --bpc-normal-bg: rgba(47, 138, 92, .16);
    --bpc-high: #b8860b;
    --bpc-high-bg: rgba(184, 134, 11, .16);
    --bpc-g1: #d1740a;
    --bpc-g1-bg: rgba(209, 116, 10, .16);
    --bpc-g2: #d94f22;
    --bpc-g2-bg: rgba(217, 79, 34, .16);
    --bpc-g3: #bb1122;
    --bpc-g3-bg: rgba(187, 17, 34, .16);
    --bpc-low: #2f6fb5;
    --bpc-low-bg: rgba(47, 111, 181, .16);
}

[data-theme="dark"] {
    --bpc-normal: #59c793;
    --bpc-high: #e2b445;
    --bpc-g1: #f0a052;
    --bpc-g2: #f4794d;
    --bpc-g3: #ff6b76;
    --bpc-low: #6ea8e8;
    --bpc-normal-bg: rgba(89, 199, 147, .18);
    --bpc-high-bg: rgba(226, 180, 69, .18);
    --bpc-g1-bg: rgba(240, 160, 82, .18);
    --bpc-g2-bg: rgba(244, 121, 77, .18);
    --bpc-g3-bg: rgba(255, 107, 118, .18);
    --bpc-low-bg: rgba(110, 168, 232, .18);
}

/* ---------- 首屏：操作区 ---------- */
.bpc-stage {
    display: grid;
    grid-template-columns: minmax(0, 1.02fr) minmax(0, .98fr);
    gap: 18px;
    align-items: start;
    margin-top: 24px;
}

.bpc-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    padding: 6px;
    background: var(--d3-paper-2);
    border: 1px solid var(--d3-line);
    border-radius: 10px;
    margin-bottom: 16px;
}

.bpc-tab {
    appearance: none;
    -webkit-appearance: none;
    border: 1px solid transparent;
    background: transparent;
    border-radius: 7px;
    padding: 8px 12px;
    font-family: inherit;
    font-size: 13.5px;
    font-weight: 650;
    color: var(--d3-ink-3);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 7px;
    transition: background .16s ease, color .16s ease, border-color .16s ease;
}
.bpc-tab:hover { color: var(--d3-ink); }
.bpc-tab small {
    font-family: var(--d3-mono);
    font-size: 10px;
    letter-spacing: .1em;
    opacity: .65;
}
.bpc-tab[aria-selected="true"] {
    background: var(--d3-card);
    color: var(--d3-accent);
    border-color: rgba(var(--d3-accent-rgb), .3);
    box-shadow: 0 1px 2px rgba(0, 0, 0, .05);
}

.bpc-panel[hidden] { display: none; }

.bpc-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 13px 14px;
}
.bpc-grid.span-1 { grid-template-columns: minmax(0, 1fr); }
.bpc-cell.span-2 { grid-column: span 2; }
.bpc-cell { min-width: 0; }

.bpc-lab {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 6px;
}
.bpc-lab > label,
.bpc-lab > span.d3-label {
    margin-bottom: 0;
    font-size: var(--d3-fs-label);
    font-weight: 600;
    color: var(--d3-ink-2);
}
.bpc-lab button {
    margin-left: auto;
}

.bpc-mini {
    appearance: none;
    -webkit-appearance: none;
    border: 1px solid var(--d3-line-2);
    background: var(--d3-paper);
    border-radius: 999px;
    padding: 3px 9px;
    font-family: inherit;
    font-size: 11.5px;
    font-weight: 600;
    color: var(--d3-ink-3);
    cursor: pointer;
    transition: all .14s ease;
}
.bpc-mini:hover { color: var(--d3-accent); border-color: var(--d3-accent); }

.bpc-pair {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
    gap: 8px;
    align-items: center;
}
.bpc-pair i {
    font-style: normal;
    font-family: var(--d3-mono);
    color: var(--d3-ink-3);
    font-size: 13px;
}

.bpc-textarea {
    width: 100%;
    min-height: 132px;
    resize: vertical;
    padding: 11px 12px;
    border: 1px solid var(--d3-line-2);
    border-radius: var(--d3-radius-sm);
    background: var(--d3-paper);
    color: var(--d3-ink);
    font-family: var(--d3-mono);
    font-size: 13px;
    line-height: 1.85;
    outline: none;
    transition: border-color .15s ease, box-shadow .15s ease;
}
.bpc-textarea:focus {
    border-color: var(--d3-accent);
    box-shadow: 0 0 0 3px rgba(var(--d3-accent-rgb), .13);
    background: var(--d3-card);
}

.bpc-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 9px;
    margin-top: 16px;
}

.bpc-btn {
    appearance: none;
    -webkit-appearance: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 7px;
    height: 38px;
    padding: 0 15px;
    border-radius: var(--d3-radius-sm);
    border: 1px solid var(--d3-line-2);
    background: var(--d3-card);
    color: var(--d3-ink);
    font-family: inherit;
    font-size: 13.5px;
    font-weight: 650;
    cursor: pointer;
    transition: transform .12s ease, border-color .16s ease, background .16s ease, color .16s ease;
}
.bpc-btn:hover { border-color: var(--d3-accent); color: var(--d3-accent); }
.bpc-btn:active { transform: translateY(1px); }
.bpc-btn-primary {
    background: var(--d3-accent);
    border-color: var(--d3-accent);
    color: #fff;
}
.bpc-btn-primary:hover { background: color-mix(in srgb, var(--d3-accent) 86%, #000); color: #fff; }
.bpc-btn-ghost { background: transparent; }
.bpc-btn-sm { height: 30px; padding: 0 10px; font-size: 12.5px; }
.bpc-btn[disabled] { opacity: .5; cursor: not-allowed; }

/* ---------- 结果卡 ---------- */
.bpc-result {
    background: var(--d3-card);
    border: 1px solid var(--d3-line);
    border-radius: var(--d3-radius);
    overflow: hidden;
}
.bpc-result-head {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
    padding: 13px 18px;
    border-bottom: 1px solid var(--d3-line);
    background: var(--d3-card-2);
}
.bpc-result-head h2 { font-size: 15px; }
.bpc-result-head .bpc-grade { margin-left: auto; }
.bpc-result-body { padding: 18px; }
.bpc-view[hidden] { display: none; }

.bpc-big {
    display: flex;
    align-items: baseline;
    gap: 9px;
    flex-wrap: wrap;
    font-family: var(--d3-mono);
    font-variant-numeric: tabular-nums;
    font-size: clamp(28px, 4.2vw, 38px);
    font-weight: 700;
    line-height: 1.15;
    letter-spacing: -.03em;
    color: var(--d3-ink);
}
.bpc-big .u {
    font-family: var(--d3-sans);
    font-size: 13.5px;
    font-weight: 600;
    color: var(--d3-ink-3);
    letter-spacing: 0;
}
.bpc-alt {
    margin-top: 10px;
    font-size: 14.5px;
    color: var(--d3-ink-2);
    line-height: 1.75;
}
.bpc-alt b { font-family: var(--d3-mono); color: var(--d3-ink); font-weight: 650; }

/* 分级徽标 */
.bpc-grade {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 10px;
    border-radius: 999px;
    font-size: 12.5px;
    font-weight: 650;
    white-space: nowrap;
    border: 1px solid transparent;
}
.bpc-grade::before {
    content: "";
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: currentColor;
}
.bpc-grade.is-normal { color: var(--bpc-normal); background: var(--bpc-normal-bg); }
.bpc-grade.is-high   { color: var(--bpc-high);   background: var(--bpc-high-bg); }
.bpc-grade.is-g1     { color: var(--bpc-g1);     background: var(--bpc-g1-bg); }
.bpc-grade.is-g2     { color: var(--bpc-g2);     background: var(--bpc-g2-bg); }
.bpc-grade.is-g3     { color: var(--bpc-g3);     background: var(--bpc-g3-bg); }
.bpc-grade.is-low    { color: var(--bpc-low);    background: var(--bpc-low-bg); }
.bpc-grade.is-none   { color: var(--d3-ink-3);   background: var(--d3-paper-2); }

/* ---------- 分级标尺 ---------- */
.bpc-band + .bpc-band { margin-top: 18px; }
.bpc-band-head {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 10px;
    margin-bottom: 7px;
}
.bpc-band-head span { font-size: 12px; color: var(--d3-ink-3); }
.bpc-band-head b {
    font-family: var(--d3-mono);
    font-variant-numeric: tabular-nums;
    font-size: 13.5px;
    color: var(--d3-ink);
}
.bpc-band-wrap { position: relative; padding-top: 26px; }
.bpc-flag {
    position: absolute;
    top: 0;
    transform: translateX(-50%);
    background: var(--d3-ink);
    color: var(--d3-paper);
    font-family: var(--d3-mono);
    font-size: 11.5px;
    font-weight: 600;
    padding: 2px 7px;
    border-radius: 6px;
    white-space: nowrap;
    transition: left .28s cubic-bezier(.4, 0, .2, 1);
}
.bpc-track {
    position: relative;
    height: 14px;
    border-radius: 999px;
    overflow: hidden;
    background: var(--d3-paper-2);
    border: 1px solid var(--d3-line);
}
.bpc-track i.seg { position: absolute; top: 0; bottom: 0; display: block; z-index: 1; }
.bpc-track i.seg.s-normal { background: var(--bpc-normal); opacity: .78; }
.bpc-track i.seg.s-high   { background: var(--bpc-high);   opacity: .78; }
.bpc-track i.seg.s-g1     { background: var(--bpc-g1);     opacity: .8; }
.bpc-track i.seg.s-g2     { background: var(--bpc-g2);     opacity: .82; }
.bpc-track i.seg.s-g3     { background: var(--bpc-g3);     opacity: .85; }
.bpc-mark {
    position: absolute;
    z-index: 3;
    top: -4px;
    bottom: -4px;
    width: 3px;
    margin-left: -1.5px;
    border-radius: 2px;
    background: var(--d3-ink);
    box-shadow: 0 0 0 2px var(--d3-card);
    transition: left .28s cubic-bezier(.4, 0, .2, 1);
}
.bpc-ticks {
    position: relative;
    height: 15px;
    margin-top: 5px;
    font-family: var(--d3-mono);
    font-size: 10.5px;
    color: var(--d3-ink-3);
}
.bpc-ticks span { position: absolute; transform: translateX(-50%); white-space: nowrap; }

.bpc-legend {
    display: flex;
    flex-wrap: wrap;
    gap: 6px 14px;
    margin-top: 14px;
    font-size: 12px;
    color: var(--d3-ink-2);
}
.bpc-legend i {
    display: inline-block;
    width: 9px;
    height: 9px;
    border-radius: 2px;
    margin-right: 6px;
    vertical-align: -1px;
}

/* ---------- 批量结果 ---------- */
.bpc-batch-box {
    margin-top: 14px;
}
.bpc-out {
    min-height: 96px;
    margin-top: 10px;
    padding: 11px 12px;
    border: 1px solid var(--d3-line);
    border-radius: var(--d3-radius-sm);
    background: var(--d3-paper);
    color: var(--d3-ink-2);
    font-family: var(--d3-mono);
    font-size: 13px;
    line-height: 1.8;
    white-space: pre-wrap;
    word-break: break-all;
    overflow: auto;
    max-height: 260px;
}
.bpc-count {
    display: flex;
    flex-wrap: wrap;
    gap: 8px 16px;
    font-size: 13px;
    color: var(--d3-ink-2);
}
.bpc-count b { font-family: var(--d3-mono); color: var(--d3-ink); }
.bpc-row-bad td { color: var(--d3-bad) !important; }

/* ---------- AI ---------- */
.bpc-ai {
    margin-top: 18px;
    padding: 15px 16px;
    border-radius: var(--d3-radius);
    border: 1px dashed rgba(var(--d3-accent-rgb), .45);
    background: rgba(var(--d3-accent-rgb), .04);
}
.bpc-ai-head {
    display: flex;
    align-items: center;
    gap: 9px;
    margin-bottom: 6px;
}
.bpc-ai-head h3 { font-size: 14.5px; }
.bpc-ai-head .bpc-tag {
    font-family: var(--d3-mono);
    font-size: 10.5px;
    letter-spacing: .08em;
    padding: 2px 7px;
    border-radius: 999px;
    color: var(--d3-accent);
    background: rgba(var(--d3-accent-rgb), .12);
}
.bpc-ai p {
    font-size: 12.5px;
    line-height: 1.75;
    color: var(--d3-ink-3);
    margin-bottom: 12px;
}
.bpc-ai-out {
    margin-top: 12px;
    padding: 12px 14px;
    border-radius: var(--d3-radius-sm);
    background: var(--d3-card);
    border: 1px solid var(--d3-line);
    font-size: 14px;
    line-height: 1.85;
    color: var(--d3-ink-2);
    white-space: pre-wrap;
    word-break: break-word;
}
.bpc-ai-out[hidden] { display: none; }

/* ---------- 对照表强调行 ---------- */
.bpc-table .is-key td { font-weight: 650; }
.bpc-table td:first-child { color: var(--d3-ink); }
.bpc-table td.wrap {
    white-space: normal;
    text-align: left;
    min-width: 15em;
    color: var(--d3-ink-2);
}
.bpc-table td.bpc-empty { text-align: center; color: var(--d3-ink-3); }

/* ---------- 响应式 ---------- */
@media (max-width: 960px) {
    .bpc-stage { grid-template-columns: minmax(0, 1fr); }
}
@media (max-width: 640px) {
    .bpc-grid { grid-template-columns: minmax(0, 1fr); }
    .bpc-cell.span-2 { grid-column: span 1; }
    .bpc-pair { grid-template-columns: minmax(0, 1fr); }
    .bpc-pair i { display: none; }
    .bpc-actions .bpc-btn { flex: 1 1 auto; }
    .bpc-result-body { padding: 15px; }
}

@media print {
    .bpc-ai, .bpc-tabs { display: none; }
}