:root{
  --bg:#faf7f2; --panel:#ffffff; --border:#e7ded1; --text:#2b241c; --sub:#786b58;
  --accent:#c1622b; --accent-dark:#9c4c1f; --accent-soft:#fbeadd;
  --ok:#2f7d4f; --ok-soft:#e7f5ec;
  --radius:14px;
  --maxw:760px;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0; background:var(--bg); color:var(--text);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  line-height:1.5;
}
a{color:var(--accent);}
header.site{
  border-bottom:1px solid var(--border); background:var(--panel);
}
.site-inner{max-width:var(--maxw); margin:0 auto; padding:16px 20px; display:flex; align-items:center; flex-wrap:wrap; gap:12px;}
.brand{display:flex; align-items:center; gap:10px; font-weight:800; font-size:18px; text-decoration:none; color:var(--text); margin-right:auto;}
.brand .mark{width:30px; height:30px; border-radius:9px; background:var(--accent); display:flex; align-items:center; justify-content:center; font-size:16px;}
nav.toollist{display:flex; gap:6px; flex-wrap:wrap;}
nav.toollist a{
  font-size:13px; padding:7px 12px; border-radius:999px; text-decoration:none; color:var(--sub);
  border:1px solid var(--border); background:var(--panel);
}
nav.toollist a.active, nav.toollist a:hover{ color:var(--accent-dark); border-color:var(--accent); background:var(--accent-soft); }

main{max-width:var(--maxw); margin:0 auto; padding:28px 20px 64px;}
h1{font-size:26px; margin:0 0 6px;}
.lede{color:var(--sub); font-size:15px; margin:0 0 24px; max-width:56ch;}

.card{background:var(--panel); border:1px solid var(--border); border-radius:var(--radius); padding:22px; margin-bottom:18px;}
.card h2{font-size:16px; margin:0 0 14px;}

label{display:block; font-size:13px; font-weight:600; color:var(--sub); margin:0 0 5px;}
input[type=text], input[type=number], select, textarea{
  width:100%; padding:10px 12px; border:1px solid var(--border); border-radius:9px;
  font-size:15px; font-family:inherit; background:#fffdfa; color:var(--text);
}
textarea{resize:vertical; min-height:140px; line-height:1.6;}
.row{display:grid; grid-template-columns:1fr 1fr; gap:12px;}
.row3{display:grid; grid-template-columns:1fr 1fr 1fr; gap:12px;}
.field{margin-bottom:14px;}
@media (max-width:520px){ .row, .row3{grid-template-columns:1fr;} }

button.primary{
  background:var(--accent); color:#fff; border:none; padding:11px 20px; border-radius:9px;
  font-size:15px; font-weight:700; cursor:pointer;
}
button.primary:hover{background:var(--accent-dark);}
button.ghost{
  background:transparent; color:var(--sub); border:1px solid var(--border); padding:11px 16px; border-radius:9px;
  font-size:14px; cursor:pointer;
}

.result{
  margin-top:18px; padding:16px 18px; border-radius:10px; background:var(--ok-soft);
  border:1px solid #cfe9d9; display:none;
}
.result.show{display:block;}
.result h3{margin:0 0 8px; font-size:14px; color:var(--ok);}
.result table{width:100%; border-collapse:collapse; font-size:14.5px;}
.result td{padding:6px 4px; border-bottom:1px solid #dfeee5;}
.result tr:last-child td{border-bottom:none;}
.result .qty{font-weight:700; text-align:right; white-space:nowrap;}

.note{font-size:12.5px; color:var(--sub); margin-top:10px;}
.hub-grid{display:grid; grid-template-columns:1fr; gap:14px; margin-top:20px;}
.hub-card{
  display:block; background:var(--panel); border:1px solid var(--border); border-radius:var(--radius);
  padding:20px; text-decoration:none; color:var(--text);
}
.hub-card:hover{border-color:var(--accent);}
.hub-card .eyebrow{font-size:12px; text-transform:uppercase; letter-spacing:.04em; color:var(--accent-dark); font-weight:700;}
.hub-card h2{margin:6px 0 6px; font-size:19px;}
.hub-card p{margin:0; color:var(--sub); font-size:14px;}

footer.site{border-top:1px solid var(--border); padding:22px 20px; text-align:center; color:var(--sub); font-size:12.5px;}

.chip-toggle{display:inline-flex; border:1px solid var(--border); border-radius:9px; overflow:hidden;}
.chip-toggle button{
  border:none; background:var(--panel); padding:9px 14px; font-size:13.5px; cursor:pointer; color:var(--sub);
}
.chip-toggle button.active{background:var(--accent); color:#fff;}

.error{color:#b3261e; font-size:13px; margin-top:8px; display:none;}
.error.show{display:block;}

.lang-switch{display:inline-flex; border:1px solid var(--border); border-radius:999px; overflow:hidden; flex-shrink:0;}
.lang-switch button{
  border:none; background:var(--panel); padding:6px 10px; font-size:11.5px; font-weight:700;
  letter-spacing:.03em; cursor:pointer; color:var(--sub);
}
.lang-switch button.active{background:var(--accent); color:#fff;}
.lang-switch button:not(.active):hover{background:var(--accent-soft); color:var(--accent-dark);}

.view-toggle{display:flex; align-items:center; justify-content:flex-end; gap:8px; margin-bottom:2px;}

.infographic-grid{
  display:grid; grid-template-columns:repeat(auto-fill, minmax(150px, 1fr)); gap:10px; margin-top:2px;
}
.infographic-card{
  background:#fffdfa; border:1px solid #dfeee5; border-radius:12px; padding:14px 12px; text-align:center;
}
.infographic-card .igc-icon{font-size:28px; line-height:1;}
.infographic-card .igc-original{font-size:11.5px; color:var(--sub); text-decoration:line-through; margin-top:6px;}
.infographic-card .igc-scaled{font-size:16px; font-weight:800; color:var(--ok); margin-top:2px;}
.infographic-card .igc-rest{font-size:12px; color:var(--text); margin-top:4px; word-break:break-word;}

.result table.hidden, .infographic-grid.hidden{display:none;}

.steps-card{display:none;}
.steps-card.show{display:block;}
.steps-card .steps-subtitle{color:var(--sub); font-size:13px; margin:-6px 0 16px;}
.steps-list{list-style:none; margin:0; padding:0; display:flex; flex-direction:column; gap:0;}
.steps-list li{
  display:flex; gap:14px; padding:0 0 18px 0; position:relative;
}
.steps-list li:not(:last-child)::before{
  content:""; position:absolute; left:19px; top:40px; bottom:0; width:2px; background:var(--border);
}
.steps-list .step-icon{
  flex:0 0 40px; height:40px; border-radius:50%; background:var(--accent-soft); color:var(--accent-dark);
  display:flex; align-items:center; justify-content:center; font-size:19px; z-index:1;
}
.steps-list .step-text{padding-top:8px; font-size:14.5px;}

.examples-row{display:flex; gap:10px; align-items:flex-end; margin-bottom:14px;}
.examples-row .field{flex:1; margin-bottom:0;}