/* 儿童视力表换算计算器 —— 靛蓝 E 字表 · 对数刻度 */
.c60{
  --a:#4338ca;
  --a2:#818cf8;
  --a-soft:rgba(67,56,202,.10);
  --a-line:rgba(67,56,202,.26);
}

/* HERO：诊室白 + 靛蓝刻度 */
.c60-hero{
  background:
    radial-gradient(560px 280px at 86% 8%, rgba(129,140,248,.40), transparent 66%),
    repeating-linear-gradient(90deg, rgba(67,56,202,.045) 0 1px, transparent 1px 34px),
    linear-gradient(128deg,#eef2ff 0%,#e0e7ff 50%,#f8faff 100%);
}
:root[data-theme="dark"] .c60-hero{
  background:
    radial-gradient(560px 280px at 86% 8%, rgba(129,140,248,.16), transparent 66%),
    repeating-linear-gradient(90deg, rgba(129,140,248,.05) 0 1px, transparent 1px 34px),
    linear-gradient(128deg,#0d1026 0%,#121734 52%,#0a0c1a 100%);
}

/* 视力表：E 字逐行缩小 */
.c60-hero-art .va-chart{
  position:relative;
  width:184px;height:184px;
  border-radius:20px;
  padding:14px 12px;
  background:rgba(255,255,255,.94);
  border:1px solid rgba(67,56,202,.18);
  box-shadow:0 18px 42px rgba(67,56,202,.20);
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:flex-start;
  gap:3px;
  overflow:hidden;
}
:root[data-theme="dark"] .c60-hero-art .va-chart{
  background:#0d1329;
  border-color:rgba(129,140,248,.24);
  box-shadow:0 18px 42px rgba(0,0,0,.5);
}
.c60-hero-art .va-row{
  color:#312e81;
  font-weight:900;
  font-family:"Courier New",monospace;
  letter-spacing:.22em;
  line-height:1.06;
  transform:scaleY(1.25);
}
:root[data-theme="dark"] .c60-hero-art .va-row{color:#c7d2fe;}
.c60-hero-art .va-row.r1{font-size:44px;}
.c60-hero-art .va-row.r2{font-size:31px;opacity:.9;}
.c60-hero-art .va-row.r3{font-size:22px;opacity:.8;}
.c60-hero-art .va-row.r4{font-size:15px;opacity:.7;}
.c60-hero-art .va-eye{
  position:absolute;
  right:10px;bottom:8px;
  font-size:20px;
  opacity:.85;
}
.c60-hero-art .chip{background:rgba(255,255,255,.94);}
:root[data-theme="dark"] .c60-hero-art .chip{background:rgba(10,16,36,.94);}
.c60-hero-art .chip b{color:#4338ca;}
:root[data-theme="dark"] .c60-hero-art .chip b{color:#818cf8;}

/* 主指标 */
.c60-metric.is-hero{
  background:linear-gradient(135deg,#312e81 0%,#4338ca 52%,#6366f1 100%);
  box-shadow:0 16px 34px rgba(67,56,202,.30);
}
.c60-metric.is-hero .v{font-size:clamp(32px,4vw,48px);letter-spacing:-1px;}

.c60-segbtn.on{color:#4338ca;}
:root[data-theme="dark"] .c60-segbtn.on{color:#818cf8;}

/* 小标题 */
.va-sub{
  position:relative;
  margin:20px 0 8px;
  padding-left:12px;
  font-size:13.5px;
  font-weight:900;
  color:var(--ink);
}
.va-sub::before{
  content:"";
  position:absolute;
  left:0;top:4px;bottom:4px;
  width:4px;
  border-radius:4px;
  background:linear-gradient(180deg,#4338ca,#818cf8);
}

/* 结果数值 */
#vaMain,#vaDecimal,#vaLogmar,#vaSnellen,#vaAgeRef{font-size:clamp(20px,2.5vw,28px);}
#vaGrade{font-size:clamp(17px,2vw,22px);}
#vaGrade.is-normal{color:#15803d;}
#vaGrade.is-mild{color:#ca8a04;}
#vaGrade.is-mid{color:#ea580c;}
#vaGrade.is-high{color:#dc2626;}
:root[data-theme="dark"] #vaGrade.is-normal{color:#4ade80;}
:root[data-theme="dark"] #vaGrade.is-mild{color:#facc15;}
:root[data-theme="dark"] #vaGrade.is-mid{color:#fb923c;}
:root[data-theme="dark"] #vaGrade.is-high{color:#f87171;}

/* 换算表 */
#vaTable td{font-variant-numeric:tabular-nums;text-align:center;}
#vaTable th{text-align:center;}
#vaTable td:first-child{font-weight:900;color:#4338ca;}
:root[data-theme="dark"] #vaTable td:first-child{color:#818cf8;}
#vaTable tbody tr.is-current td{
  background:color-mix(in srgb,var(--a) 11%,var(--card));
  font-weight:800;
  color:var(--ink);
}
#vaTable tbody tr:nth-child(even) td{background:color-mix(in srgb,var(--a) 3%,transparent);}
#vaTable tbody tr.is-current:nth-child(even) td{background:color-mix(in srgb,var(--a) 11%,var(--card));}
#vaTable tbody tr.is-weak td:first-child{opacity:.75;}

/* 解读卡 */
.va-advice{display:flex;flex-direction:column;gap:9px;margin-top:10px;}
.va-advice .row{
  display:grid;
  grid-template-columns:50px minmax(0,1fr);
  gap:11px;
  padding:11px 13px;
  border-radius:12px;
  background:var(--soft);
  border-left:3px solid rgba(67,56,202,.5);
}
:root[data-theme="dark"] .va-advice .row{background:#141f31;border-left-color:#818cf8;}
.va-advice .tag{
  display:grid;
  place-items:center;
  height:24px;
  border-radius:7px;
  background:rgba(67,56,202,.12);
  color:#4338ca;
  font-size:11px;
  font-weight:900;
}
:root[data-theme="dark"] .va-advice .tag{background:rgba(129,140,248,.14);color:#818cf8;}
.va-advice .tx{font-size:12.5px;line-height:1.7;color:var(--ink2);}
.va-advice .tx b{color:var(--ink);}

/* 条形图 */
.c60-bar-row .bf{background:linear-gradient(90deg,#4338ca,#818cf8);}

/* 批量表 */
#vaBatchTable td:first-child{font-weight:800;color:var(--ink);}
#vaBatchTable td:nth-child(n+3){font-variant-numeric:tabular-nums;}
#vaBatchTableWrap{margin-top:12px;}
.c60-table tr.is-bad td{background:rgba(220,38,38,.07);color:#b91c1c;}
:root[data-theme="dark"] .c60-table tr.is-bad td{background:rgba(248,113,113,.10);color:#fca5a5;}

/* 输入 */
#vaValue,#vaAge,#vaMonths{font-variant-numeric:tabular-nums;font-weight:800;}
#vaValueUnit{min-width:42px;text-align:center;}

@media (max-width:960px){
  .c60-hero-art .va-chart{width:152px;height:152px;}
  .c60-hero-art .va-row.r1{font-size:36px;}
  .c60-hero-art .va-row.r2{font-size:26px;}
  .c60-hero-art .va-row.r3{font-size:18px;}
  .c60-hero-art .va-row.r4{font-size:12px;}
}
@media (max-width:640px){
  .c60-hero-art{display:none;}
  .c60-metrics{grid-template-columns:1fr 1fr;}
  #vaTable{min-width:420px;}
  .va-advice .row{grid-template-columns:44px minmax(0,1fr);}
}
@media print{
  .c60-actions,.c60-batch,.c60-hist{display:none!important;}
  #vaTable{font-size:11px;}
  #vaTable th,#vaTable td{padding:5px 7px;}
  #vaTable tbody tr{break-inside:avoid;}
}