/* ==========================================================================
   经营所得个税 · 页面专属样式
   视觉：一张「个人经营所得税单」——顶部编号条 + 应纳税额大数字 + 五级税率阶梯。
   颜色走 --d3-* 令牌，深色主题自动生效。前缀统一 bit-
   ========================================================================== */

/* 深色下 #24507e 太暗，配深色文字对比不足，提亮一档 */
html[data-theme="dark"] {
    --d3-accent: #6aa5db;
    --d3-accent-rgb: 106, 165, 219;
}

/* ---------- 1. 表单 ---------- */
.d3-h1 { max-width: 24em; }

.bit-builder { margin-top: 26px; overflow: visible; }

.bit-fields {
    display: grid;
    grid-template-columns:
        minmax(0, .95fr) minmax(0, .95fr) minmax(0, 1.1fr) minmax(0, 1.05fr);
    gap: 12px 14px;
    align-items: end;
}

.bit-field { min-width: 0; }

.bit-fields .span-2 { grid-column: span 2; }

.bit-field > label,
.bit-label {
    display: block;
    font-size: var(--d3-fs-label);
    font-weight: 600;
    color: var(--d3-ink-2);
    margin-bottom: 6px;
}

/* 主体类型 / 征收方式：胶囊组 */
.bit-seg {
    display: flex;
    align-items: center;
    gap: 4px;
    min-height: 43px;
    padding: 3px;
    border: 1px solid var(--d3-line-2);
    border-radius: var(--d3-radius-sm);
    background: var(--d3-paper-2);
}

.bit-seg input {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.bit-seg label {
    flex: 1 1 0;
    min-width: 0;
    text-align: center;
    cursor: pointer;
    font-size: 12px;
    font-weight: 650;
    line-height: 1.15;
    padding: 7px 6px;
    border-radius: 5px;
    color: var(--d3-ink-3);
    white-space: nowrap;
    transition: background .14s ease, color .14s ease;
}

.bit-seg input:checked + label {
    background: var(--d3-accent);
    color: var(--d3-accent-ink);
}

.bit-seg input:focus-visible + label {
    outline: 2px solid rgba(var(--d3-accent-rgb), .55);
    outline-offset: 2px;
}

.bit-sub {
    margin: 12px 0 0;
    font-size: 12px;
    line-height: 1.7;
    color: var(--d3-ink-3);
}
.bit-sub b { color: var(--d3-ink-2); font-weight: 650; }

/* 勾选行 */
.bit-check {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    margin-top: 14px;
    padding: 10px 12px;
    font-size: 12.5px;
    line-height: 1.65;
    color: var(--d3-ink-2);
    background: var(--d3-paper-2);
    border: 1px solid var(--d3-line);
    border-radius: var(--d3-radius-sm);
    cursor: pointer;
}

.bit-check input {
    flex: none;
    width: 15px;
    height: 15px;
    margin: 2px 0 0;
    accent-color: var(--d3-accent);
    cursor: pointer;
}

.bit-check b { color: var(--d3-ink); font-weight: 650; }

.bit-deduct {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px 14px;
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px dashed var(--d3-line);
}
.bit-deduct[hidden] { display: none; }

.bit-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 14px;
    padding-top: 13px;
    border-top: 1px dashed var(--d3-line);
}

.bit-btn {
    appearance: none;
    font: inherit;
    font-size: 13px;
    font-weight: 650;
    line-height: 1.2;
    padding: 9px 16px;
    border-radius: var(--d3-radius-sm);
    border: 1px solid var(--d3-accent);
    background: var(--d3-accent);
    color: var(--d3-accent-ink);
    cursor: pointer;
    white-space: nowrap;
    transition: filter .15s ease, border-color .15s ease, color .15s ease;
}

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

.bit-btn-ghost {
    background: var(--d3-card);
    border-color: var(--d3-line-2);
    color: var(--d3-ink-2);
    font-weight: 600;
    font-size: 12.5px;
    padding: 9px 13px;
}

.bit-btn-ghost:hover {
    filter: none;
    border-color: var(--d3-accent);
    color: var(--d3-accent);
}

.bit-err {
    margin: 10px 0 0;
    font-size: 12.5px;
    line-height: 1.6;
    color: var(--d3-bad);
}
.bit-err[hidden] { display: none; }

/* ---------- 2. 主体区 ---------- */
.bit-stage {
    display: grid;
    grid-template-columns: minmax(0, 1.12fr) minmax(0, .88fr);
    gap: 18px;
    align-items: start;
    margin-top: 20px;
}

.bit-stage > * { min-width: 0; }

/* 税单 */
.bit-receipt {
    position: relative;
    padding: 0 0 16px;
    background: var(--d3-card);
    border: 1px solid var(--d3-line);
    border-radius: var(--d3-radius);
    overflow: hidden;
}

.bit-receipt::before {
    content: "";
    position: absolute;
    left: 0; top: 0; right: 0;
    height: 3px;
    background: linear-gradient(to right, var(--d3-accent), rgba(var(--d3-accent-rgb), .12));
}

.bit-receipt-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    padding: 12px 18px 10px;
    border-bottom: 1px dashed var(--d3-line);
    font-family: var(--d3-mono);
    font-size: 10px;
    letter-spacing: .14em;
    text-transform: uppercase;
    color: var(--d3-ink-3);
}

.bit-receipt-top b { color: var(--d3-ink-2); letter-spacing: .04em; }

.bit-receipt-body { padding: 14px 18px 0; }

.bit-badge {
    font-family: var(--d3-mono);
    font-size: 11px;
    font-weight: 650;
    line-height: 1;
    padding: 5px 8px;
    border-radius: 999px;
    border: 1px solid var(--d3-line-2);
    color: var(--d3-ink-3);
    white-space: nowrap;
    letter-spacing: 0;
}

.bit-badge.is-ok { border-color: rgba(29, 107, 79, .38); color: var(--d3-ok); background: rgba(29, 107, 79, .07); }
.bit-badge.is-warn { border-color: rgba(168, 84, 26, .42); color: var(--d3-warn); background: rgba(168, 84, 26, .08); }
.bit-badge.is-relief { border-color: rgba(var(--d3-accent-rgb), .45); color: var(--d3-accent); background: rgba(var(--d3-accent-rgb), .1); }

/* 双数字 */
.bit-nums {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
}

.bit-num-kicker {
    display: block;
    font-size: 11.5px;
    color: var(--d3-ink-3);
    margin-bottom: 4px;
}

.bit-num {
    margin: 0;
    font-family: var(--d3-mono);
    font-variant-numeric: tabular-nums;
    font-size: clamp(24px, 3vw, 33px);
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -.035em;
    color: var(--d3-ink);
}

.bit-num.is-due { color: var(--d3-accent); }

.bit-num-sub {
    margin: 6px 0 0;
    font-size: 11.5px;
    line-height: 1.55;
    color: var(--d3-ink-3);
}

/* ---------- 3. 税率阶梯 ---------- */
.bit-ladder {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 6px;
    margin: 16px 0 0;
    padding-top: 14px;
    border-top: 1px dashed var(--d3-line);
}

.bit-step {
    padding: 8px 6px 9px;
    text-align: center;
    border: 1px solid var(--d3-line);
    border-radius: var(--d3-radius-sm);
    background: var(--d3-paper-2);
    transition: background .2s ease, border-color .2s ease, transform .2s ease;
}

.bit-step b {
    display: block;
    font-family: var(--d3-mono);
    font-size: 15px;
    font-weight: 700;
    line-height: 1.1;
    color: var(--d3-ink-2);
}

.bit-step small {
    display: block;
    margin-top: 3px;
    font-size: 10px;
    line-height: 1.3;
    color: var(--d3-ink-3);
    white-space: nowrap;
}

.bit-step.is-active {
    background: var(--d3-accent);
    border-color: var(--d3-accent);
    transform: translateY(-3px);
    box-shadow: 0 4px 12px rgba(var(--d3-accent-rgb), .22);
}

.bit-step.is-active b,
.bit-step.is-active small { color: var(--d3-accent-ink); }

/* 深色下实色填充太刺眼，改成描边式高亮 */
html[data-theme="dark"] .bit-step.is-active {
    background: rgba(var(--d3-accent-rgb), .14);
    border-color: rgba(var(--d3-accent-rgb), .55);
    box-shadow: 0 4px 12px rgba(0, 0, 0, .3);
}

html[data-theme="dark"] .bit-step.is-active b { color: var(--d3-accent); }
html[data-theme="dark"] .bit-step.is-active small { color: var(--d3-ink-2); }

/* ---------- 4. 分档表 ---------- */
.bit-table { margin-top: 14px; }
.bit-table th,
.bit-table td { font-size: 12.5px; }
.bit-table td:first-child { color: var(--d3-ink-3); width: 42px; }
.bit-table td.num, .bit-table th { font-family: var(--d3-mono); }
.bit-table tr.bit-sum td {
    font-weight: 700;
    color: var(--d3-ink);
    background: var(--d3-paper-2);
    border-top: 1px solid var(--d3-line-2);
}
.bit-td-empty {
    text-align: center;
    color: var(--d3-ink-3);
    font-size: 12.5px;
    padding: 18px 0;
}

/* ---------- 5. 指标 ---------- */
.bit-kv {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1px;
    margin: 0;
    background: var(--d3-line);
    border: 1px solid var(--d3-line);
    border-radius: var(--d3-radius);
    overflow: hidden;
}

.bit-kv > div { padding: 9px 13px 10px; background: var(--d3-card); min-width: 0; }

/* 奇数项时最后一项占满整行 */
.bit-kv > div:last-child:nth-child(odd) { grid-column: 1 / -1; }

.bit-kv dt {
    font-size: 11.5px;
    color: var(--d3-ink-3);
    margin-bottom: 3px;
}

.bit-kv dd {
    margin: 0;
    font-family: var(--d3-mono);
    font-variant-numeric: tabular-nums;
    font-size: 14px;
    font-weight: 650;
    color: var(--d3-ink);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* ---------- 6. 提示 ---------- */
.bit-alerts { display: grid; gap: 8px; margin-top: 12px; }
.bit-alerts:empty { display: none; }

.bit-alert {
    display: flex;
    gap: 8px;
    align-items: flex-start;
    padding: 8px 11px;
    font-size: 12.5px;
    line-height: 1.6;
    border-radius: var(--d3-radius-sm);
    border: 1px solid var(--d3-line-2);
    background: var(--d3-paper-2);
    color: var(--d3-ink-2);
}

.bit-alert::before {
    content: "";
    flex: none;
    width: 6px;
    height: 6px;
    margin-top: 6px;
    border-radius: 50%;
    background: var(--d3-ink-3);
}

.bit-alert.is-ok { border-color: rgba(29, 107, 79, .34); background: rgba(29, 107, 79, .06); color: var(--d3-ok); }
.bit-alert.is-ok::before { background: var(--d3-ok); }
.bit-alert.is-warn { border-color: rgba(168, 84, 26, .4); background: rgba(168, 84, 26, .07); color: var(--d3-warn); }
.bit-alert.is-warn::before { background: var(--d3-warn); }
.bit-alert.is-bad { border-color: rgba(176, 42, 36, .38); background: rgba(176, 42, 36, .07); color: var(--d3-bad); }
.bit-alert.is-bad::before { background: var(--d3-bad); }

/* ---------- 7. 报告 ---------- */
.bit-report {
    margin: 12px 0 0;
    padding: 12px 14px;
    font-family: var(--d3-mono);
    font-size: 12px;
    line-height: 1.8;
    color: var(--d3-ink-2);
    background: var(--d3-paper-2);
    border: 1px dashed var(--d3-line-2);
    border-radius: var(--d3-radius-sm);
    white-space: pre-wrap;
    word-break: break-word;
}

/* ---------- 8. 响应式 ---------- */
@media (max-width: 1080px) {
    .bit-stage { grid-template-columns: minmax(0, 1fr); }
    .bit-fields { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 640px) {
    .bit-builder { margin-top: 18px; }
    .bit-fields { grid-template-columns: minmax(0, 1fr); }
    .bit-fields .span-2 { grid-column: auto; }
    .bit-deduct { grid-template-columns: minmax(0, 1fr); }
    .bit-nums { grid-template-columns: minmax(0, 1fr); gap: 10px; }
    .bit-ladder { gap: 4px; }
    .bit-step { padding: 7px 3px 8px; }
    .bit-step b { font-size: 13px; }
    .bit-step small { font-size: 9px; }
    .bit-kv { grid-template-columns: minmax(0, 1fr); }
    /* base.css 给 .d3-table 定了 460px 最小宽，窄屏必须放开，否则整表横向滚动 */
    .bit-table { min-width: 0; }
    .bit-table th,
    .bit-table td { padding: 8px 5px; font-size: 11.5px; }
    /* 级数列对填报没有信息量，窄屏去掉 */
    .bit-table th:nth-child(1),
    .bit-table td:nth-child(1) { display: none; }
    .bit-actions .bit-btn-ghost { flex: 1 1 auto; }
    .bit-receipt-body { padding: 12px 14px 0; }
    .bit-receipt-top { padding: 10px 14px 9px; }
}