/* ==========================================================================
   面积计算器 · 页面专属样式
   设计意图：左侧是图形选择卡（点一下换形状），右侧一张方格纸上的示意图会跟着重画，
   面积数字压在图纸右下角，像量房时随手写在图纸上的标注。
   仅本页引用。
   ========================================================================== */

.ar-desk {
    display: grid;
    grid-template-columns: minmax(0, 1.06fr) minmax(0, .94fr);
    gap: 20px;
    align-items: start;
    margin-top: 26px;
}

/* ---------- 图形选择 ---------- */
.ar-shapes {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 7px;
    margin-bottom: 18px;
}

.ar-shape {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 5px;
    cursor: pointer;
    appearance: none;
    font-family: inherit;
    font-size: 11.5px;
    font-weight: 600;
    line-height: 1.2;
    color: var(--d3-ink-3);
    background: var(--d3-paper);
    border: 1px solid var(--d3-line-2);
    border-radius: 8px;
    padding: 9px 4px 8px;
    transition: border-color .15s ease, color .15s ease, background .15s ease;
}

.ar-shape svg {
    width: 28px;
    height: 22px;
    stroke: currentColor;
    stroke-width: 1.4;
    fill: none;
    opacity: .8;
}

.ar-shape:hover {
    border-color: var(--d3-accent);
    color: var(--d3-accent);
    background: rgba(var(--d3-accent-rgb), .06);
}

.ar-shape.is-on {
    border-color: var(--d3-accent);
    background: var(--d3-accent);
    color: var(--d3-accent-ink);
    box-shadow: 0 2px 8px rgba(var(--d3-accent-rgb), .28);
}

.ar-shape.is-on svg { opacity: 1; }

/* ---------- 字段与单位 ---------- */
.ar-fields {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 13px 14px;
}

.ar-fields[hidden] { display: none; }

.ar-units {
    display: flex;
    gap: 6px;
    margin-bottom: 14px;
}

.ar-units input {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.ar-units span {
    display: inline-block;
    cursor: pointer;
    font-size: 12.5px;
    font-weight: 600;
    padding: 7px 12px;
    border: 1px solid var(--d3-line-2);
    border-radius: 7px;
    color: var(--d3-ink-2);
    background: var(--d3-paper);
    transition: all .14s ease;
    user-select: none;
}

.ar-units span:hover { border-color: var(--d3-accent); color: var(--d3-accent); }

.ar-units input:checked + span {
    background: rgba(var(--d3-accent-rgb), .12);
    border-color: var(--d3-accent);
    color: var(--d3-accent);
}

.ar-units input:focus-visible + span {
    outline: 2px solid rgba(var(--d3-accent-rgb), .6);
    outline-offset: 2px;
}

/* ---------- 按钮 ---------- */
.ar-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 18px;
    padding-top: 16px;
    border-top: 1px dashed var(--d3-line);
}

.ar-btn {
    appearance: none;
    cursor: pointer;
    font-family: inherit;
    font-size: 13px;
    font-weight: 650;
    line-height: 1;
    padding: 10px 15px;
    border-radius: 8px;
    border: 1px solid var(--d3-accent);
    background: var(--d3-accent);
    color: var(--d3-accent-ink);
    transition: filter .15s ease, background .15s ease, color .15s ease, border-color .15s ease;
}

.ar-btn:hover { filter: brightness(1.06); }

.ar-btn-ghost {
    background: transparent;
    border-color: var(--d3-line-2);
    color: var(--d3-ink-2);
}

.ar-btn-ghost:hover {
    border-color: var(--d3-accent);
    color: var(--d3-accent);
    background: rgba(var(--d3-accent-rgb), .06);
}

.ar-btn-sm { padding: 8px 12px; font-size: 12.5px; }

.ar-alerts { display: grid; gap: 8px; margin-top: 14px; }
.ar-alerts:empty { display: none; }

/* ---------- 右侧：图纸 + 数字 ---------- */
.ar-result {
    position: relative;
    background: var(--d3-card);
    border: 1px solid var(--d3-line);
    border-radius: var(--d3-radius);
    padding: 16px;
    overflow: hidden;
}

.ar-figure {
    margin: 0;
    border: 1px solid var(--d3-line);
    border-radius: var(--d3-radius-sm);
    background-color: var(--d3-paper);
    /* 方格纸：两条细线叠成 12px 网格 */
    background-image:
        linear-gradient(to right, rgba(120, 120, 120, .1) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(120, 120, 120, .1) 1px, transparent 1px);
    background-size: 12px 12px;
    overflow: hidden;
}

:root[data-theme="dark"] .ar-figure {
    background-image:
        linear-gradient(to right, rgba(140, 150, 170, .12) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(140, 150, 170, .12) 1px, transparent 1px);
}

#arSvg {
    display: block;
    width: 100%;
    height: auto;
}

.ar-figure figcaption {
    padding: 7px 11px;
    font-family: var(--d3-mono);
    font-size: 11.5px;
    color: var(--d3-ink-3);
    border-top: 1px dashed var(--d3-line-2);
    background: var(--d3-card);
}

.ar-number {
    margin-top: 14px;
    padding-bottom: 12px;
    border-bottom: 1px dashed var(--d3-line-2);
}

.ar-number-label {
    font-family: var(--d3-mono);
    font-size: 10.5px;
    letter-spacing: .18em;
    text-transform: uppercase;
    color: var(--d3-ink-3);
}

.ar-number-value {
    display: flex;
    align-items: baseline;
    gap: 6px;
    margin-top: 4px;
    font-family: var(--d3-mono);
    font-variant-numeric: tabular-nums;
    font-size: clamp(34px, 5vw, 46px);
    font-weight: 700;
    line-height: 1.05;
    letter-spacing: -.04em;
    color: var(--d3-ink);
}

.ar-number-value small {
    font-family: var(--d3-sans);
    font-size: 14px;
    font-weight: 600;
    color: var(--d3-ink-3);
    letter-spacing: 0;
}

.ar-number-sub {
    margin-top: 5px;
    font-size: 12.5px;
    color: var(--d3-ink-3);
}

.ar-conv {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1px;
    margin: 12px 0 0;
    background: var(--d3-line);
    border: 1px solid var(--d3-line);
    border-radius: var(--d3-radius-sm);
    overflow: hidden;
}

.ar-conv > div {
    background: var(--d3-card);
    padding: 9px 10px;
}

.ar-conv dt {
    font-size: 11px;
    color: var(--d3-ink-3);
    margin-bottom: 2px;
}

.ar-conv dd {
    margin: 0;
    font-family: var(--d3-mono);
    font-variant-numeric: tabular-nums;
    font-size: 13.5px;
    font-weight: 650;
    color: var(--d3-ink);
}

.ar-material {
    margin-top: 12px;
    display: grid;
    gap: 7px;
}

.ar-material-row {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 10px;
    font-size: 12.5px;
    color: var(--d3-ink-2);
    padding: 9px 11px;
    border-radius: 7px;
    background: rgba(var(--d3-accent-rgb), .07);
}

.ar-material-row b { color: var(--d3-accent); font-family: var(--d3-mono); }

.ar-material-row strong {
    font-family: var(--d3-mono);
    font-variant-numeric: tabular-nums;
    font-size: 14px;
    color: var(--d3-ink);
}

.ar-note {
    margin-top: 11px;
    font-size: 11.5px;
    line-height: 1.7;
    color: var(--d3-ink-3);
}

/* ---------- SVG 内元素 ---------- */
.ar-svg-shape {
    fill: rgba(var(--d3-accent-rgb), .16);
    stroke: var(--d3-accent);
    stroke-width: 1.8;
    stroke-linejoin: round;
}

.ar-svg-dim {
    stroke: var(--d3-ink-3);
    stroke-width: 1;
    stroke-dasharray: 3 3;
    fill: none;
}

.ar-svg-text {
    fill: var(--d3-ink-2);
    font-family: var(--d3-mono);
    font-size: 11px;
}

.ar-svg-label {
    fill: var(--d3-ink-3);
    font-family: var(--d3-mono);
    font-size: 10px;
}

.ar-svg-fill {
    fill: var(--d3-accent);
    opacity: .9;
}

/* ---------- 批量 ---------- */
.ar-batch-wrap {
    margin-top: 22px;
    background: var(--d3-card);
    border: 1px solid var(--d3-line);
    border-radius: var(--d3-radius);
    padding: 16px 18px 18px;
}

.ar-batch-head {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 8px 14px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--d3-line);
}

.ar-batch-head h2 { font-size: var(--d3-fs-h3); }

.ar-batch-head span {
    font-size: 12px;
    color: var(--d3-ink-3);
    margin-left: auto;
}

.ar-batch {
    display: grid;
    grid-template-columns: minmax(240px, 340px) minmax(0, 1fr);
    gap: 16px;
    margin-top: 14px;
    align-items: start;
}

.ar-batch textarea {
    width: 100%;
    font-family: var(--d3-mono);
    font-size: 12.5px;
    line-height: 1.75;
    color: var(--d3-ink);
    background: var(--d3-paper);
    border: 1px solid var(--d3-line-2);
    border-radius: var(--d3-radius-sm);
    padding: 10px 12px;
    resize: vertical;
    outline: none;
    transition: border-color .15s ease, box-shadow .15s ease;
}

.ar-batch textarea:focus {
    border-color: var(--d3-accent);
    box-shadow: 0 0 0 3px rgba(var(--d3-accent-rgb), .13);
}

.ar-batch-act {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    margin-top: 9px;
}

.ar-batch-act .d3-hint { margin: 0; }

.ar-table-wrap { background: var(--d3-card); }
.ar-table { min-width: 420px; }
.ar-table td.num, .ar-table td:not(:first-child) { font-family: var(--d3-mono); font-variant-numeric: tabular-nums; }
.ar-empty { text-align: center !important; color: var(--d3-ink-3); font-family: var(--d3-sans) !important; }

/* ---------- 响应式 ---------- */
@media (max-width: 1080px) {
    .ar-desk { grid-template-columns: minmax(0, 1fr); }
    .ar-batch { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 640px) {
    .ar-shapes { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 5px; }
    .ar-shape { font-size: 11px; padding: 8px 2px 7px; }
    .ar-shape svg { width: 24px; height: 19px; }
    .ar-units { flex-wrap: wrap; }
    .ar-number-value { font-size: 32px; }
    .ar-batch-wrap { padding: 14px; }
}

@media print {
    .d3-top, .d3-foot, .ar-actions, .ar-batch-wrap, .d3-related { display: none !important; }
    .ar-desk { grid-template-columns: 1fr; }
    body { background: #fff; }
}