:root{
    --navy:#00396b;
    --navy-2:#005199;
    --cyan:#17b6e9;
    --cyan-soft:#e7f7fd;
    --ink:#0e2233;
    --muted:#5c7184;
    --line:#dbe6ee;
    --bg:#f4f8fb;
    --card:#ffffff;
    --good:#1a8f5e;
    --good-bg:#e8f8f0;
    --warn-bg:#fff8e1;
    --warn-line:#f0d98c;
    --radius:14px;
    --font-display: 'Sora', 'Segoe UI', system-ui, sans-serif;
    --font-body: 'Inter', 'Segoe UI', system-ui, sans-serif;
    --font-mono: 'JetBrains Mono', 'SFMono-Regular', Consolas, monospace;
  }
  *{box-sizing:border-box;}
  html,body{margin:0;padding:0;}
  body{
    background:
      radial-gradient(1100px 500px at 100% -10%, rgba(23,182,233,.10), transparent 60%),
      radial-gradient(900px 500px at -10% 110%, rgba(0,57,107,.08), transparent 60%),
      var(--bg);
    font-family:var(--font-body);
    color:var(--ink);
    min-height:100vh;
    padding:32px 20px 64px;
  }
  .wrap{max-width:1080px;margin:0 auto;}

  /* Header */
  .topbar{
    display:flex;align-items:center;justify-content:space-between;
    gap:16px;margin-bottom:28px;flex-wrap:wrap;
  }
  .brand{display:flex;align-items:center;gap:14px;}
  .brand img{height:48px;width:auto;max-width:none;display:block;object-fit:contain;flex:none;}
  .brand .divider{width:1px;height:34px;background:var(--line);}
  .brand .titles h1{
    font-family:var(--font-display);
    font-size:17px;font-weight:700;margin:0;color:var(--navy);
    letter-spacing:.2px;
  }
  .brand .titles p{margin:2px 0 0;font-size:12.5px;color:var(--muted);}
  .origin-pill{
    display:flex;align-items:center;gap:8px;
    background:var(--card);border:1px solid var(--line);
    border-radius:999px;padding:8px 16px;font-size:13px;color:var(--navy);
    font-weight:600;box-shadow:0 1px 2px rgba(14,34,51,.04);
  }
  .origin-pill .dot{width:8px;height:8px;border-radius:50%;background:var(--cyan);flex:none;
    box-shadow:0 0 0 4px var(--cyan-soft);}

  /* Layout */
  .grid{display:grid;grid-template-columns:1.1fr .9fr;gap:24px;align-items:start;}
  @media (max-width:860px){.grid{grid-template-columns:1fr;}}

  .card{
    background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
    padding:26px;box-shadow:0 1px 2px rgba(14,34,51,.03), 0 12px 32px -20px rgba(14,34,51,.18);
  }
  .card h2{
    font-family:var(--font-display);font-size:14px;font-weight:700;
    text-transform:uppercase;letter-spacing:.09em;color:var(--navy);margin:0 0 20px;
    display:flex;align-items:center;gap:9px;
  }
  .card h2 .idx{
    display:inline-flex;align-items:center;justify-content:center;
    width:22px;height:22px;border-radius:7px;background:var(--navy);color:#fff;
    font-size:11px;font-weight:700;letter-spacing:0;
  }

  .field{margin-bottom:18px;position:relative;}
  .field:last-child{margin-bottom:0;}
  .field label{
    display:block;font-size:12.5px;font-weight:600;color:var(--muted);
    margin-bottom:7px;letter-spacing:.01em;
  }

  /* Searchable combobox */
  .combo{position:relative;}
  .combo input.combo-input{
    width:100%;padding:12px 40px 12px 14px;border:1.5px solid var(--line);
    border-radius:10px;font-size:14.5px;font-family:var(--font-body);color:var(--ink);
    background:#fbfdfe;transition:border-color .15s, box-shadow .15s;
  }
  .combo input.combo-input:focus{
    outline:none;border-color:var(--cyan);box-shadow:0 0 0 3px var(--cyan-soft);background:#fff;
  }
  .combo .caret{
    position:absolute;right:14px;top:50%;transform:translateY(-50%);
    pointer-events:none;color:var(--muted);font-size:11px;
  }
  .combo-panel{
    position:absolute;z-index:30;top:calc(100% + 6px);left:0;right:0;
    background:#fff;border:1px solid var(--line);border-radius:10px;
    box-shadow:0 16px 40px -12px rgba(14,34,51,.28);
    max-height:230px;overflow-y:auto;display:none;
  }
  .combo-panel.open{display:block;}
  .combo-opt{
    padding:10px 14px;font-size:14px;cursor:pointer;color:var(--ink);
    display:flex;align-items:center;justify-content:space-between;gap:8px;
  }
  .combo-opt:hover, .combo-opt.active{background:var(--cyan-soft);}
  .combo-opt .tag{font-size:10.5px;color:var(--muted);font-family:var(--font-mono);}
  .combo-empty{padding:14px;font-size:13px;color:var(--muted);}

  /* Toggle */
  .toggle-row{display:flex;align-items:center;justify-content:space-between;gap:12px;}
  .toggle-row .hint{font-size:11.5px;color:var(--muted);margin-top:4px;}
  .switch{
    position:relative;width:48px;height:28px;border-radius:999px;background:var(--line);
    cursor:pointer;flex:none;transition:background .18s;
  }
  .switch.on{background:var(--cyan);}
  .switch .knob{
    position:absolute;top:3px;left:3px;width:22px;height:22px;border-radius:50%;
    background:#fff;box-shadow:0 1px 3px rgba(0,0,0,.25);transition:left .18s;
  }
  .switch.on .knob{left:23px;}

  /* Add-distance inline */
  .add-distance{
    margin-top:10px;padding:12px 14px;background:var(--warn-bg);
    border:1px solid var(--warn-line);border-radius:10px;display:none;
  }
  .add-distance.show{display:block;}
  .add-distance p{margin:0 0 8px;font-size:12.5px;color:#7a5d12;font-weight:600;}
  .add-distance .row{display:flex;gap:8px;}
  .add-distance input[type=number]{
    flex:1;padding:9px 12px;border:1.5px solid var(--warn-line);border-radius:8px;
    font-size:14px;background:#fff;
  }
  .add-distance button{
    border:none;background:var(--navy);color:#fff;font-weight:600;font-size:13px;
    padding:0 16px;border-radius:8px;cursor:pointer;transition:background .15s;
  }
  .add-distance button:hover{background:var(--navy-2);}

  /* Result panel */
  .result-hero{
    background:linear-gradient(135deg,var(--navy) 0%, var(--navy-2) 60%, #0a6ba8 100%);
    border-radius:var(--radius);padding:28px 26px;color:#fff;position:relative;overflow:hidden;
  }
  .result-hero::after{
    content:"";position:absolute;right:-40px;top:-40px;width:180px;height:180px;
    border-radius:50%;background:radial-gradient(circle, rgba(23,182,233,.35), transparent 70%);
  }
  .result-hero .label{
    font-size:11.5px;text-transform:uppercase;letter-spacing:.12em;font-weight:700;
    color:rgba(255,255,255,.75);margin:0 0 8px;
  }
  .result-hero .value{
    font-family:var(--font-display);font-size:40px;font-weight:700;margin:0;
    letter-spacing:-.01em;position:relative;z-index:1;
  }
  .result-hero .value.error{font-size:16px;font-weight:600;color:#ffe08a;}
  .result-hero .formula{
    margin-top:10px;font-size:12px;color:rgba(255,255,255,.68);font-family:var(--font-mono);
  }

  .breakdown{margin-top:16px;display:grid;grid-template-columns:1fr 1fr;gap:10px;}
  .breakdown .item{
    background:var(--card);border:1px solid var(--line);border-radius:10px;padding:13px 14px;
  }
  .breakdown .item .k{font-size:11px;color:var(--muted);font-weight:600;text-transform:uppercase;letter-spacing:.06em;margin:0 0 4px;}
  .breakdown .item .v{font-family:var(--font-mono);font-size:15px;font-weight:600;color:var(--ink);margin:0;}
  .breakdown .item.full{grid-column:1 / -1;}

  .table-badge{
    display:inline-flex;align-items:center;gap:6px;margin-top:14px;
    background:var(--good-bg);color:var(--good);font-size:12px;font-weight:700;
    padding:6px 12px;border-radius:999px;
  }
  .table-badge .dot{width:6px;height:6px;border-radius:50%;background:var(--good);}

  footer{
    margin-top:28px;text-align:center;font-size:11.5px;color:var(--muted);line-height:1.6;
  }
  footer a{color:var(--navy-2);}