/* ======================================================================
   calc60 设计系统 —— 计算类工具的公共骨架
   页面根节点：<main class="c60" style="--a:#xxxxxx;--a2:#xxxxxx">
   所有样式均限定在 .c60 作用域内，避免影响站内其它页面。
   ====================================================================== */

.c60{
  --a:#2563eb;
  --a2:#7c3aed;
  --a-soft:rgba(37,99,235,.10);
  --a-line:rgba(37,99,235,.24);
  --ink:#0f172a;
  --ink2:#334155;
  --muted:#64748b;
  --bg:#f5f7fb;
  --card:#ffffff;
  --line:#e3e9f2;
  --soft:#f1f5f9;
  --ok:#059669;
  --ok-soft:#ecfdf5;
  --warn:#b45309;
  --warn-soft:#fff7ed;
  --err:#dc2626;
  --err-soft:#fef2f2;
  --r:18px;
  --r-sm:12px;
  --shadow:0 12px 32px rgba(15,23,42,.07);
  --shadow-sm:0 4px 14px rgba(15,23,42,.05);
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;

  display:block;
  min-height:100vh;
  padding:0 0 56px;
  background:
    radial-gradient(1100px 520px at 8% -10%, color-mix(in srgb, var(--a) 9%, transparent), transparent 70%),
    radial-gradient(900px 460px at 92% 6%, color-mix(in srgb, var(--a2) 8%, transparent), transparent 66%),
    var(--bg);
  color:var(--ink);
  font-family:var(--font);
  font-size:15px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

.c60 *,
.c60 *::before,
.c60 *::after{box-sizing:border-box;}

.c60-wrap{
  width:100%;
  max-width:1180px;
  margin:0 auto;
  padding:0 20px;
}

.c60 a{color:var(--a);text-decoration:none;}
.c60 a:hover{text-decoration:underline;}

/* ---------------------------------------------------------------- HERO */
.c60-hero{
  position:relative;
  overflow:hidden;
  margin:18px auto 0;
  border-radius:24px;
  background:
    linear-gradient(135deg, color-mix(in srgb, var(--a) 12%, #fff) 0%, color-mix(in srgb, var(--a2) 9%, #fff) 54%, #fff 100%);
  border:1px solid var(--line);
  box-shadow:var(--shadow);
}
.c60-hero::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:
    linear-gradient(to right, rgba(15,23,42,.045) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(15,23,42,.045) 1px, transparent 1px);
  background-size:34px 34px;
  mask-image:radial-gradient(80% 80% at 70% 20%, #000 0%, transparent 78%);
  -webkit-mask-image:radial-gradient(80% 80% at 70% 20%, #000 0%, transparent 78%);
  pointer-events:none;
  opacity:.7;
}
.c60-hero-in{
  position:relative;
  z-index:1;
  display:grid;
  grid-template-columns:minmax(0,1.25fr) minmax(0,.75fr);
  gap:28px;
  align-items:center;
  padding:34px 38px 36px;
}
.c60-hero-main{min-width:0;}
.c60-hero-badge{
  display:inline-flex;
  align-items:center;
   gap:8px;
  padding:6px 12px 6px 7px;
  border-radius:999px;
  background:rgba(255,255,255,.78);
  border:1px solid color-mix(in srgb, var(--a) 22%, #fff);
  color:var(--a);
  font-size:12.5px;
  font-weight:800;
  letter-spacing:.4px;
  box-shadow:var(--shadow-sm);
}
.c60-hero-badge .ico{
  display:inline-grid;
  place-items:center;
  width:26px;height:26px;
  border-radius:999px;
  font-size:15px;
  background:linear-gradient(135deg,var(--a),var(--a2));
  color:#fff;
}
.c60-hero h1{
  margin:16px 0 10px;
  font-size:clamp(26px,3.2vw,40px);
  line-height:1.22;
  font-weight:900;
  letter-spacing:-.6px;
  color:var(--ink);
}
.c60-hero h1 em{
  font-style:normal;
  background:linear-gradient(120deg,var(--a),var(--a2));
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}
.c60-hero-sub{
  margin:0;
  max-width:60ch;
  color:var(--ink2);
  font-size:15.5px;
  line-height:1.8;
}
.c60-hero-sub b{color:var(--ink);font-weight:800;}
.c60-hero-sub em{font-style:normal;color:var(--a);font-weight:800;}
.c60-hero-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px;}
.c60-tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 11px;
  border-radius:999px;
  background:rgba(255,255,255,.72);
  border:1px solid var(--line);
  color:var(--ink2);
  font-size:12.5px;
  font-weight:700;
}
.c60-tag i{font-style:normal;color:var(--a);}

.c60-hero-art{
  position:relative;
  display:grid;
  place-items:center;
  min-height:190px;
}
.c60-hero-art .ring{
  position:absolute;
  width:168px;height:168px;
  border-radius:50%;
  border:1px dashed color-mix(in srgb, var(--a) 40%, #fff);
  animation:c60spin 26s linear infinite;
}
.c60-hero-art .ring:nth-child(2){
  width:118px;height:118px;
  border-style:solid;
  border-color:color-mix(in srgb, var(--a2) 26%, transparent);
  animation-direction:reverse;
  animation-duration:18s;
}
.c60-hero-art .core{
  position:relative;
  display:grid;
  place-items:center;
  width:96px;height:96px;
  border-radius:26px;
  font-size:40px;
  background:linear-gradient(145deg,var(--a),var(--a2));
  color:#fff;
  box-shadow:0 18px 40px color-mix(in srgb, var(--a) 34%, transparent);
}
.c60-hero-art .chip{
  position:absolute;
  padding:7px 12px;
  border-radius:12px;
  background:rgba(255,255,255,.92);
  border:1px solid var(--line);
  font-size:12px;
  font-weight:800;
  color:var(--ink2);
  box-shadow:var(--shadow-sm);
}
.c60-hero-art .chip.c1{top:10px;left:2px;transform:rotate(-4deg);}
.c60-hero-art .chip.c2{bottom:14px;right:0;transform:rotate(3deg);}
.c60-hero-art .chip b{color:var(--a);}
@keyframes c60spin{to{transform:rotate(360deg);}}
@media (prefers-reduced-motion:reduce){
  .c60-hero-art .ring{animation:none;}
}

/* hero 变体：居中 */
.c60-hero.is-center .c60-hero-in{grid-template-columns:1fr;text-align:center;}
.c60-hero.is-center .c60-hero-tags{justify-content:center;}
.c60-hero.is-center .c60-hero-sub{margin-inline:auto;}
.c60-hero.is-center .c60-hero-art{display:none;}

/* hero 变体：横幅 */
.c60-hero.is-band .c60-hero-in{
  grid-template-columns:1fr;
  padding:30px 34px 28px;
}
.c60-hero.is-band .c60-hero-art{display:none;}
.c60-hero.is-band h1{margin-top:12px;}

/* --------------------------------------------------------------- SHELL */
.c60-shell{
  display:grid;
  grid-template-columns:minmax(0,.94fr) minmax(0,1.06fr);
  gap:22px;
  align-items:start;
  margin-top:22px;
}
.c60-col{display:flex;flex-direction:column;gap:22px;min-width:0;}

.c60-card{
  position:relative;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--r);
  box-shadow:var(--shadow-sm);
  padding:24px;
}
.c60-card-h{
  display:flex;align-items:center;justify-content:space-between;
  gap:12px;
  margin:0 0 16px;
}
.c60-card-h h2{
  margin:0;
  font-size:17px;
  font-weight:900;
  letter-spacing:-.2px;
  display:flex;align-items:center;gap:10px;
}
.c60-card-h h2 .no{
  display:inline-grid;
  place-items:center;
  width:28px;height:28px;
  border-radius:9px;
  background:linear-gradient(135deg,var(--a),var(--a2));
  color:#fff;
  font-size:12px;
  font-weight:900;
  letter-spacing:0;
  box-shadow:0 6px 16px color-mix(in srgb,var(--a) 30%,transparent);
}
.c60-card-h .aside{
  font-size:12.5px;
  color:var(--muted);
  font-weight:600;
  white-space:nowrap;
}
.c60-tip{
  margin:-4px 0 16px;
  color:var(--muted);
  font-size:13px;
  line-height:1.7;
}
.c60-tip b{color:var(--ink2);}

/* --------------------------------------------------------------- FIELDS */
.c60-field{margin-bottom:15px;}
.c60-field-head{
  display:flex;align-items:baseline;justify-content:space-between;
  gap:10px;
  margin-bottom:7px;
}
.c60-field label{
  display:inline-flex;align-items:center;gap:6px;
  font-size:13.5px;
  font-weight:800;
  color:var(--ink2);
  letter-spacing:.1px;
}
.c60-field label .q{
  display:inline-grid;place-items:center;
  width:15px;height:15px;border-radius:50%;
  background:var(--soft);color:var(--muted);
  font-size:10px;font-weight:900;
  cursor:help;
}
.c60-field .hint{font-size:12px;color:var(--muted);}
.c60-control{
  display:flex;
  align-items:center;
  gap:0;
  border:1.5px solid var(--line);
  border-radius:12px;
  background:#fff;
  transition:border-color .18s,box-shadow .18s;
}
.c60-control:focus-within{
  border-color:var(--a);
  box-shadow:0 0 0 4px color-mix(in srgb,var(--a) 14%,transparent);
}
.c60-control input[type="number"],
.c60-control input[type="text"],
.c60-control input[type="date"],
.c60-control select{
  flex:1;
  min-width:0;
  width:100%;
  border:0;
  outline:0;
  background:transparent;
  padding:11px 13px;
  font-size:15px;
  font-weight:700;
  color:var(--ink);
  font-family:var(--font);
}
.c60-control input::placeholder{color:#a3aec2;font-weight:500;}
.c60-control .unit{
  flex:none;
  padding:0 13px 0 10px;
  border-left:1px solid var(--soft);
  color:var(--muted);
  font-size:12.5px;
  font-weight:800;
  white-space:nowrap;
}
.c60-control select{
  appearance:none;
  background-image:linear-gradient(45deg,transparent 50%,var(--muted) 50%),
                    linear-gradient(135deg,var(--muted) 50%,transparent 50%);
  background-position:calc(100% - 16px) 55%,calc(100% - 11px) 55%;
  background-size:5px 5px,5px 5px;
  background-repeat:no-repeat;
  padding-right:34px;
  cursor:pointer;
}
.c60-field.is-err .c60-control{
  border-color:var(--err);
  box-shadow:0 0 0 4px rgba(220,38,38,.08);
}
.c60-field.is-err .err{
  display:block;
  margin-top:5px;
  color:var(--err);
  font-size:12px;
  font-weight:700;
}
.c60-field .err{display:none;}

.c60-grid2{display:grid;grid-template-columns:1fr 1fr;gap:12px;}
.c60-grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;}

/* segmented */
.c60-seg{
  display:flex;
  gap:6px;
  padding:5px;
  border-radius:14px;
  background:var(--soft);
  border:1px solid var(--line);
  margin-bottom:16px;
  overflow-x:auto;
  scrollbar-width:none;
}
.c60-seg::-webkit-scrollbar{display:none;}
.c60-segbtn{
  flex:1;
  min-width:84px;
  padding:9px 12px;
  border:0;
  border-radius:10px;
  background:transparent;
  color:var(--muted);
  font-family:var(--font);
  font-size:13px;
  font-weight:800;
  cursor:pointer;
  white-space:nowrap;
  transition:background .18s,color .18s,box-shadow .18s;
}
.c60-segbtn:hover{color:var(--ink2);}
.c60-segbtn.on{
  background:#fff;
  color:var(--a);
  box-shadow:0 4px 12px rgba(15,23,42,.09);
}

/* chips */
.c60-chips{display:flex;flex-wrap:wrap;gap:8px;margin:2px 0 16px;}
.c60-chip{
  padding:6px 12px;
  border:1px solid var(--line);
  border-radius:999px;
  background:#fff;
  color:var(--ink2);
  font-family:var(--font);
  font-size:12.5px;
  font-weight:700;
  cursor:pointer;
  transition:all .16s;
}
.c60-chip:hover{border-color:var(--a-line);color:var(--a);}
.c60-chip.on{
  background:var(--a-soft);
  border-color:var(--a);
  color:var(--a);
  font-weight:800;
}

/* range */
.c60-range{
  -webkit-appearance:none;
  appearance:none;
  width:100%;
  height:6px;
  margin:10px 0 4px;
  border-radius:999px;
  background:linear-gradient(to right,var(--a) 0%,var(--a) var(--fill,50%),var(--soft) var(--fill,50%),var(--soft) 100%);
  outline:0;
  cursor:pointer;
}
.c60-range::-webkit-slider-thumb{
  -webkit-appearance:none;
  width:20px;height:20px;
  border-radius:50%;
  background:#fff;
  border:3px solid var(--a);
  box-shadow:0 3px 10px rgba(15,23,42,.18);
}
.c60-range::-moz-range-thumb{
  width:16px;height:16px;
  border-radius:50%;
  background:#fff;border:3px solid var(--a);
}

/* buttons */
.c60-actions{display:flex;flex-wrap:wrap;gap:9px;margin-top:18px;}
.c60-btn{
  display:inline-flex;align-items:center;justify-content:center;gap:7px;
  padding:11px 18px;
  border-radius:12px;
  border:1.5px solid var(--line);
  background:#fff;
  color:var(--ink2);
  font-family:var(--font);
  font-size:13.5px;
  font-weight:800;
  cursor:pointer;
  transition:all .16s;
  white-space:nowrap;
}
.c60-btn:hover{border-color:var(--a-line);color:var(--a);transform:translateY(-1px);}
.c60-btn:active{transform:translateY(0);}
.c60-btn-main{
  border-color:transparent;
  background:linear-gradient(135deg,var(--a),var(--a2));
  color:#fff;
  box-shadow:0 10px 22px color-mix(in srgb,var(--a) 30%,transparent);
}
.c60-btn-main:hover{color:#fff;filter:brightness(1.04);}
.c60-btn-ghost{background:var(--soft);border-color:transparent;}
.c60-btn-sm{padding:7px 12px;font-size:12.5px;border-radius:9px;}
.c60-btn-danger{border-color:rgba(220,38,38,.3);color:var(--err);}
.c60-btn-danger:hover{border-color:var(--err);color:var(--err);}

/* message */
.c60-msg{
  min-height:20px;
  margin-top:13px;
  padding:9px 12px;
  border-radius:10px;
  font-size:13px;
  font-weight:700;
  line-height:1.6;
  background:var(--soft);
  color:var(--muted);
}
.c60-msg.ok{background:var(--ok-soft);color:var(--ok);}
.c60-msg.warn{background:var(--warn-soft);color:var(--warn);}
.c60-msg.err{background:var(--err-soft);color:var(--err);}

/* --------------------------------------------------------------- RESULTS */
.c60-metrics{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(120px,1fr));
  gap:10px;
}
.c60-metric{
  position:relative;
  padding:15px 14px;
  border-radius:14px;
  background:linear-gradient(160deg,#fff, color-mix(in srgb,var(--a) 4%, #fff));
  border:1px solid var(--line);
  min-width:0;
  overflow:hidden;
}
.c60-metric::after{
  content:"";
  position:absolute;
  left:0;top:0;right:0;
  height:3px;
  background:linear-gradient(90deg,var(--a),var(--a2));
  opacity:.85;
}
.c60-metric .k{
  font-size:11.5px;
  color:var(--muted);
  font-weight:800;
  letter-spacing:.4px;
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
}
.c60-metric .v{
  margin-top:5px;
  font-size:clamp(21px,2.3vw,29px);
  line-height:1.15;
  font-weight:900;
  letter-spacing:-.8px;
  color:var(--ink);
  word-break:break-all;
}
.c60-metric .v small{
  font-size:12px;
  font-weight:700;
  color:var(--muted);
  letter-spacing:0;
  margin-left:3px;
}
.c60-metric .s{margin-top:3px;font-size:11.5px;color:var(--muted);}
.c60-metric.is-hero{
  grid-column:1/-1;
  background:linear-gradient(135deg,color-mix(in srgb,var(--a) 92%, #000 8%),var(--a2));
  border-color:transparent;
  color:#fff;
  box-shadow:0 14px 30px color-mix(in srgb,var(--a) 26%, transparent);
}
.c60-metric.is-hero .k{color:rgba(255,255,255,.82);}
.c60-metric.is-hero .v{color:#fff;}
.c60-metric.is-hero .v small{color:rgba(255,255,255,.8);}
.c60-metric.is-hero .s{color:rgba(255,255,255,.8);}
.c60-metric.is-hero::after{display:none;}

/* formula / steps */
.c60-steps{
  margin-top:14px;
  padding:14px 16px;
  border-radius:12px;
  background:var(--soft);
  border:1px dashed color-mix(in srgb,var(--a) 22%, var(--line));
  font-size:13px;
  line-height:1.9;
  color:var(--ink2);
  overflow-x:auto;
}
.c60-steps code{
  display:inline-block;
  padding:1px 6px;
  border-radius:6px;
  background:#fff;
  border:1px solid var(--line);
  font-family:ui-monospace,SFMono-Regular,Consolas,monospace;
  font-size:12.5px;
  color:var(--a);
  white-space:nowrap;
}
.c60-steps b{color:var(--ink);}

/* bar chart */
.c60-bars{margin-top:16px;display:flex;flex-direction:column;gap:9px;}
.c60-bar-row{display:grid;grid-template-columns:92px minmax(0,1fr) 78px;gap:10px;align-items:center;}
.c60-bar-row .bk{font-size:12px;color:var(--muted);font-weight:700;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.c60-bar-row .bt{height:10px;border-radius:999px;background:var(--soft);overflow:hidden;}
.c60-bar-row .bf{height:100%;border-radius:999px;background:linear-gradient(90deg,var(--a),var(--a2));transition:width .5s cubic-bezier(.2,.7,.2,1);}
.c60-bar-row .bv{text-align:right;font-size:12px;font-weight:800;color:var(--ink2);white-space:nowrap;}

/* table */
.c60-table-wrap{overflow-x:auto;margin-top:14px;border:1px solid var(--line);border-radius:12px;}
.c60-table{width:100%;border-collapse:collapse;font-size:13px;min-width:420px;}
.c60-table th{
  padding:10px 12px;
  background:var(--soft);
  color:var(--ink2);
  font-weight:800;
  text-align:left;
  white-space:nowrap;
  border-bottom:1px solid var(--line);
}
.c60-table td{
  padding:9px 12px;
  border-bottom:1px solid var(--soft);
  color:var(--ink2);
}
.c60-table tr:last-child td{border-bottom:0;}
.c60-table tr.is-total td{background:color-mix(in srgb,var(--a) 5%, #fff);font-weight:800;color:var(--ink);}

/* note / warn */
.c60-note{
  margin-top:16px;
  padding:13px 15px;
  border-radius:12px;
  border-left:4px solid var(--a);
  background:var(--a-soft);
  color:var(--ink2);
  font-size:13px;
  line-height:1.8;
}
.c60-note h3,.c60-warn h3{margin:0 0 6px;font-size:13.5px;font-weight:900;color:var(--ink);}
.c60-warn{
  margin-top:14px;
  padding:13px 15px;
  border-radius:12px;
  border-left:4px solid var(--warn);
  background:var(--warn-soft);
  color:#7c2d12;
  font-size:13px;
  line-height:1.8;
}
.c60-warn h3{color:#7c2d12;}
.c60-note ul,.c60-warn ul{margin:6px 0 0;padding-left:18px;}
.c60-note li,.c60-warn li{margin:4px 0;}
.c60-note b,.c60-warn b{font-weight:900;}

/* batch */
.c60-batch{display:none;}
.c60-batch.on{display:block;}
.c60-batch textarea{
  width:100%;
  min-height:112px;
  resize:vertical;
  padding:12px 14px;
  border:1.5px solid var(--line);
  border-radius:12px;
  outline:0;
  background:#fff;
  color:var(--ink);
  font-family:ui-monospace,SFMono-Regular,Consolas,monospace;
  font-size:13px;
  line-height:1.7;
  transition:border-color .18s,box-shadow .18s;
}
.c60-batch textarea:focus{
  border-color:var(--a);
  box-shadow:0 0 0 4px color-mix(in srgb,var(--a) 14%,transparent);
}

/* history */
.c60-hist{display:flex;flex-wrap:wrap;gap:8px;margin-top:10px;}
.c60-hist-item{
  display:inline-flex;align-items:center;gap:8px;
  padding:7px 11px;
  border-radius:9px;
  border:1px solid var(--line);
  background:#fff;
  color:var(--ink2);
  font-size:12px;
  font-weight:700;
  cursor:pointer;
  transition:all .16s;
}
.c60-hist-item:hover{border-color:var(--a-line);color:var(--a);}
.c60-hist-empty{font-size:12.5px;color:var(--muted);}

/* tabs */
.c60-tabs{display:flex;gap:6px;padding:5px;background:var(--soft);border-radius:12px;margin-bottom:14px;overflow-x:auto;}
.c60-tab{
  flex:1;min-width:74px;padding:8px 12px;border:0;border-radius:8px;background:transparent;
  color:var(--muted);font-family:var(--font);font-size:12.5px;font-weight:800;cursor:pointer;white-space:nowrap;
}
.c60-tab.on{background:#fff;color:var(--a);box-shadow:0 3px 10px rgba(15,23,42,.08);}

/* toast */
.c60-toast{
  position:fixed;
  left:50%;
  bottom:28px;
  transform:translate(-50%,20px);
  z-index:9999;
  padding:11px 18px;
  border-radius:12px;
  background:rgba(15,23,42,.94);
  color:#fff;
  font-size:13.5px;
  font-weight:700;
  box-shadow:0 14px 34px rgba(15,23,42,.28);
  opacity:0;
  pointer-events:none;
  transition:opacity .2s,transform .2s;
}
.c60-toast.on{opacity:1;transform:translate(-50%,0);}

/* ------------------------------------------------------------- DARK MODE */
:root[data-theme="dark"] .c60{
  --ink:#e8eef8;
  --ink2:#c7d2e2;
  --muted:#94a3b8;
  --bg:#070d18;
  --card:#0e1626;
  --line:#1f2b3e;
  --soft:#141f31;
  --ok:#34d399;
  --ok-soft:rgba(16,185,129,.12);
  --warn:#fbbf24;
  --warn-soft:rgba(245,158,11,.12);
  --err:#f87171;
  --err-soft:rgba(239,68,68,.12);
  --shadow:0 16px 40px rgba(0,0,0,.36);
  --shadow-sm:0 6px 18px rgba(0,0,0,.24);
  background:
    radial-gradient(1100px 520px at 8% -10%, color-mix(in srgb, var(--a) 16%, transparent), transparent 70%),
    radial-gradient(900px 460px at 92% 6%, color-mix(in srgb, var(--a2) 14%, transparent), transparent 66%),
    var(--bg);
}
:root[data-theme="dark"] .c60-hero{
  background:linear-gradient(135deg,color-mix(in srgb,var(--a) 18%,#0b1322) 0%,color-mix(in srgb,var(--a2) 15%,#0b1322) 56%,#0b1322 100%);
}
:root[data-theme="dark"] .c60-hero::before{
  background-image:
    linear-gradient(to right, rgba(148,163,184,.09) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(148,163,184,.09) 1px, transparent 1px);
}
:root[data-theme="dark"] .c60-hero-badge,
:root[data-theme="dark"] .c60-tag,
:root[data-theme="dark"] .c60-hero-art .chip{
  background:rgba(14,22,38,.82);
  border-color:var(--line);
}
:root[data-theme="dark"] .c60-control,
:root[data-theme="dark"] .c60-chip,
:root[data-theme="dark"] .c60-btn,
:root[data-theme="dark"] .c60-hist-item,
:root[data-theme="dark"] .c60-segbtn.on,
:root[data-theme="dark"] .c60-tab.on{
  background:#101a2b;
}
:root[data-theme="dark"] .c60-segbtn.on,
:root[data-theme="dark"] .c60-tab.on{background:#182338;}
:root[data-theme="dark"] .c60-steps code{background:#0a1220;border-color:var(--line);}
:root[data-theme="dark"] .c60-metric{
  background:linear-gradient(160deg,#101a2b, color-mix(in srgb,var(--a) 10%, #101a2b));
}

/* ------------------------------------------------------------- RESPONSIVE */
@media (max-width:980px){
  .c60-shell{grid-template-columns:1fr;}
  .c60-hero-in{grid-template-columns:1fr;padding:28px 26px 30px;}
  .c60-hero-art{display:none;}
}
@media (max-width:640px){
  .c60-wrap{padding:0 14px;}
  .c60-hero{margin-top:12px;border-radius:18px;}
  .c60-hero h1{font-size:26px;letter-spacing:-.4px;}
  .c60-hero-sub{font-size:14px;}
  .c60-card{padding:18px 16px;border-radius:16px;}
  .c60-grid2,.c60-grid3{grid-template-columns:1fr;}
  .c60-bar-row{grid-template-columns:74px minmax(0,1fr) 62px;}
  .c60-actions .c60-btn{flex:1 1 auto;}
  .c60-metrics{grid-template-columns:1fr 1fr;}
  .c60-metric.is-hero{grid-column:1/-1;}
}

/* ------------------------------------------------------------------ PRINT */
@media print{
  .c60{background:#fff!important;}
  .c60-hero{box-shadow:none;}
  .c60-actions,.c60-seg,.c60-chips,.c60-msg,.c60-batch,.c60-hist{display:none!important;}
  .c60-shell{grid-template-columns:1fr;}
  .c60-card{box-shadow:none;break-inside:avoid;}
}