/* 个人所得税计算器 — Slate Professional 深夜蓝 */
:root {
    --bg: #0f172a;
    --panel: rgba(30, 41, 59, 0.52);
    --panel-solid: #1e293b;
    --border: rgba(148, 163, 184, 0.22);
    --accent: #38bdf8;
    --accent-soft: rgba(56, 189, 248, 0.16);
    --ink: #f1f5f9;
    --ink-soft: #94a3b8;
    --ink-bright: #7dd3fc;
    --ok: #4ade80;
    --warn: #fbbf24;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    font-family: "Segoe UI", "Microsoft YaHei", -apple-system, sans-serif;
    background: linear-gradient(160deg, #0f172a 0%, #16213b 60%, #0f172a 100%);
    min-height: 100vh;
    color: var(--ink);
    font-size: 14px;
    line-height: 1.6;
    padding-bottom: 40px;
}

.tool-header {
    max-width: 1200px;
    margin: 0 auto;
    padding: 28px 20px 10px;
    text-align: center;
}
.back-link {
    display: inline-block;
    color: var(--ink-bright);
    text-decoration: none;
    font-size: 13px;
    margin-bottom: 14px;
    padding: 5px 14px;
    border: 1px solid var(--border);
    border-radius: 20px;
    background: rgba(2, 6, 23, 0.4);
}
.back-link:hover { background: var(--accent-soft); }
.tool-header h1 { font-size: 1.7em; color: var(--ink); }
.tool-header .sub { color: var(--ink-soft); font-size: 13px; margin-top: 6px; }

.tc-main { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* Tabs */
.tc-tabs {
    display: flex;
    gap: 8px;
    margin: 22px 0 16px;
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 6px;
}
.tc-tab {
    flex: 1;
    padding: 10px 0;
    border: none;
    border-radius: 8px;
    background: transparent;
    color: var(--ink-soft);
    font-size: 14px;
    cursor: pointer;
    font-family: inherit;
    transition: all .18s;
}
.tc-tab:hover { color: var(--ink-bright); }
.tc-tab.active {
    background: var(--accent-soft);
    color: var(--ink-bright);
    border: 1px solid rgba(56, 189, 248, 0.35);
    font-weight: 600;
}

/* Panels */
.tc-panel {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 22px;
    margin-bottom: 18px;
}
.tc-form-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 14px 18px;
    margin-bottom: 16px;
}
.tc-panel label {
    display: flex;
    flex-direction: column;
    gap: 6px;
    color: var(--ink-soft);
    font-size: 13px;
}
.tc-panel input, .tc-panel select {
    padding: 8px 10px;
    border: 1px solid rgba(148, 163, 184, 0.35);
    border-radius: 6px;
    background: rgba(2, 6, 23, 0.45);
    color: var(--ink);
    font-size: 14px;
    font-family: inherit;
    width: 100%;
}
.tc-panel input:focus, .tc-panel select:focus {
    outline: none;
    border-color: var(--accent);
}
input:-webkit-autofill,
input:-webkit-autofill:hover,
input:-webkit-autofill:focus {
    -webkit-box-shadow: 0 0 0 1000px #172033 inset;
    -webkit-text-fill-color: var(--ink);
    transition: background-color 9999s;
}

.tc-deduct {
    border: 1px dashed var(--border);
    border-radius: 10px;
    padding: 14px 16px 2px;
    margin-bottom: 16px;
}
.tc-deduct-title { color: var(--ink-bright); font-size: 13px; font-weight: 600; margin-bottom: 12px; }

.tc-note { color: var(--ink-soft); font-size: 13px; margin-bottom: 14px; }
.tc-note b { color: var(--warn); }

.btn-primary {
    display: block;
    width: 260px;
    margin: 6px auto 4px;
    padding: 11px 0;
    border: none;
    border-radius: 8px;
    background: linear-gradient(135deg, #0ea5e9, #38bdf8);
    color: #062a3d;
    font-size: 15px;
    font-weight: 700;
    cursor: pointer;
    font-family: inherit;
    transition: transform .12s, box-shadow .12s;
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 6px 18px rgba(56, 189, 248, 0.3); }

/* Result cards */
.tc-result { margin-top: 18px; }
.tc-cards {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
    margin-bottom: 14px;
}
.tc-card {
    background: rgba(2, 6, 23, 0.4);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 14px;
    text-align: center;
}
.tc-card span { display: block; color: var(--ink-soft); font-size: 12px; margin-bottom: 6px; }
.tc-card b { color: var(--ink); font-size: 1.35em; font-variant-numeric: tabular-nums; }
.tc-card.main { border-color: rgba(56, 189, 248, 0.5); background: var(--accent-soft); }
.tc-card.main b { color: var(--accent); font-size: 1.6em; }

.tc-calc-detail {
    background: rgba(2, 6, 23, 0.35);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 14px 16px;
    color: var(--ink-soft);
    font-size: 13px;
    font-family: Consolas, "Courier New", monospace;
    white-space: pre-wrap;
    line-height: 1.9;
}

/* Monthly table */
.tc-table-wrap {
    max-height: 480px;
    overflow: auto;
    border: 1px solid var(--border);
    border-radius: 10px;
}
.tc-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
    font-variant-numeric: tabular-nums;
}
.tc-table th, .tc-table td {
    padding: 9px 12px;
    text-align: right;
    border-bottom: 1px solid rgba(148, 163, 184, 0.14);
    color: var(--ink);
}
.tc-table th:nth-child(1), .tc-table td:nth-child(1) { text-align: center; }
.tc-table thead th {
    position: sticky;
    top: 0;
    background: var(--panel-solid);
    color: var(--ink-bright);
    font-weight: 600;
    z-index: 1;
}
.tc-table tbody tr:hover { background: rgba(56, 189, 248, 0.07); }
.tc-table .jump { color: var(--warn); font-weight: 600; }

/* Bonus compare */
.b-compare {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
    margin-bottom: 14px;
}
.b-scheme {
    background: rgba(2, 6, 23, 0.4);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 16px;
}
.b-scheme.best { border-color: rgba(74, 222, 128, 0.55); }
.b-scheme h3 { font-size: 14px; color: var(--ink-bright); margin-bottom: 10px; }
.b-scheme h3 small { color: var(--ink-soft); font-weight: 400; }
.b-lines {
    color: var(--ink-soft);
    font-size: 12.5px;
    font-family: Consolas, monospace;
    line-height: 1.9;
    white-space: pre-wrap;
    margin-bottom: 10px;
}
.b-tax { font-size: 1.15em; color: var(--ink); font-variant-numeric: tabular-nums; }
.b-tax b { color: var(--accent); font-size: 1.25em; }
.b-scheme.best .b-tax b { color: var(--ok); }

.b-verdict {
    text-align: center;
    background: var(--accent-soft);
    border: 1px solid rgba(56, 189, 248, 0.4);
    border-radius: 10px;
    padding: 12px;
    font-size: 14px;
    margin-bottom: 14px;
}
.b-verdict b { color: var(--ink-bright); }

.tc-tip {
    color: var(--warn);
    font-size: 12.5px;
    background: rgba(251, 191, 36, 0.08);
    border: 1px dashed rgba(251, 191, 36, 0.35);
    border-radius: 8px;
    padding: 10px 14px;
}

/* Reference tables */
.tc-ref {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 20px 22px;
    margin-bottom: 20px;
}
.tc-ref h2 { font-size: 15px; color: var(--ink-bright); margin-bottom: 14px; }
.tc-ref-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.tc-ref h3 { font-size: 13px; color: var(--ink-soft); margin-bottom: 8px; }
.tc-foot { color: var(--ink-soft); font-size: 12px; margin-top: 14px; line-height: 1.8; }

.tool-footer {
    text-align: center;
    color: var(--ink-soft);
    font-size: 12px;
    padding: 20px;
}