:root{
  --bg:#f6f8f9; --surface:#ffffff; --ink:#15201f; --muted:#5b6b69;
  --accent:#0f766e; --accent-ink:#0b5a54; --button-ink:#ffffff; --line:#e2e8e6;
  --good:#0f766e; --warn-bg:#fff7e6; --warn-line:#f2d38a;
  --shadow:0 1px 2px rgba(16,40,38,.06),0 4px 16px rgba(16,40,38,.05);
  --radius:14px; --maxw:780px;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font:16px/1.65 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
}
a{color:var(--accent-ink);text-decoration:underline;text-underline-offset:.12em}
a:hover{text-decoration:underline}
:focus-visible{outline:3px solid var(--accent);outline-offset:2px;border-radius:4px}

.site-header{
  display:flex;align-items:center;justify-content:space-between;gap:1rem;flex-wrap:wrap;
  max-width:var(--maxw);margin:0 auto;padding:1rem 1.25rem .5rem;
}
.brand-group{display:flex;align-items:baseline;gap:.75rem;flex-wrap:wrap}
.brand{font-size:1.35rem;font-weight:800;letter-spacing:-.02em;color:var(--ink)}
.brand:hover{text-decoration:none}
.brand-mark{color:var(--accent)}
.tagline{color:var(--muted);font-size:.9rem}
.primary-nav{display:flex;gap:.85rem;flex-wrap:wrap;font-size:.9rem;font-weight:700}
.primary-nav a,.site-header a,nav[aria-label="Breadcrumb"] a,.site-footer nav a{text-decoration:none}

nav[aria-label="Breadcrumb"]{
  max-width:var(--maxw);margin:0 auto;padding:.35rem 1.25rem;
  color:var(--muted);font-size:.85rem;
}
nav[aria-label="Breadcrumb"] a{color:var(--muted)}

main{max-width:var(--maxw);margin:0 auto;padding:.5rem 1.25rem 3rem}
h1{font-size:1.9rem;line-height:1.2;letter-spacing:-.02em;margin:.6rem 0 1rem}
h2{font-size:1.15rem;margin:0 0 .6rem}
h3{font-size:1rem;margin:1rem 0 .4rem;color:var(--muted)}

main section{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:1.1rem 1.25rem;margin:0 0 1rem;
}

/* The headline estimate */
.estimate{font-size:1.05rem;margin:.4rem 0}
.estimate strong{font-size:2.1rem;font-weight:800;color:var(--accent);letter-spacing:-.02em;display:inline-block}
.estimate span{color:var(--muted);font-size:1rem}

/* Confidence chips */
.chip{display:inline-block;padding:.12rem .55rem;border-radius:999px;font-size:.8rem;font-weight:700;border:1px solid var(--line)}
.chip-high{background:#e7f6f2;color:#0b5a54;border-color:#bfe6dd}
.chip-medium{background:#eef4fb;color:#1a4f8a;border-color:#cfe0f3}
.chip-low{background:#fbf0ee;color:#8a3b2e;border-color:#f0cfc8}

table{width:100%;border-collapse:collapse;margin:.5rem 0;font-size:.95rem;overflow:hidden;border-radius:10px;border:1px solid var(--line)}
caption{text-align:left;color:var(--muted);padding:.25rem 0}
th,td{padding:.55rem .7rem;text-align:left;border-bottom:1px solid var(--line)}
thead th{background:#eef2f1;font-size:.82rem;text-transform:uppercase;letter-spacing:.03em;color:var(--muted)}
tbody tr:nth-child(even){background:#fafcfb}
tbody tr:last-child td{border-bottom:0}

ul{padding-left:1.2rem}
li{margin:.2rem 0}
.lede{font-size:1.08rem;color:var(--muted);margin-top:-.35rem}
.microcopy{font-size:.85rem;color:var(--muted)}

.facts{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:.6rem;margin:1rem 0}
.facts div,.result-grid div{border:1px solid var(--line);border-radius:10px;padding:.7rem;background:var(--bg)}
.facts dt,.result-grid span{font-size:.78rem;text-transform:uppercase;letter-spacing:.03em;color:var(--muted)}
.facts dd{margin:.2rem 0 0;font-weight:700}
.glossary{margin:0}
.glossary dt{font-weight:800;color:var(--accent-ink);margin-top:.85rem}
.glossary dt:first-child{margin-top:0}
.glossary dd{margin:.2rem 0 0;color:var(--muted)}

.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:.8rem}
label{font-size:.88rem;font-weight:700;color:var(--muted)}
input,select,button{
  width:100%;font:inherit;color:var(--ink);background:var(--surface);
  border:1px solid var(--line);border-radius:9px;padding:.62rem .7rem;margin-top:.25rem;
}
input:focus,select:focus{border-color:var(--accent)}
button{width:auto;background:var(--accent);color:var(--button-ink);border-color:transparent;font-weight:800;cursor:pointer;margin-top:1rem}
button:hover{filter:brightness(.95)}
.input-suffix{display:flex;align-items:center}
.input-suffix input{border-radius:9px 0 0 9px}
.input-suffix span{padding:.62rem .7rem;margin-top:.25rem;border:1px solid var(--line);border-left:0;border-radius:0 9px 9px 0;background:var(--bg)}
.form-error{min-height:1.2em;color:#9b2c2c;font-weight:700}
.result-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:.6rem}
.result-grid strong{display:block;font-size:1.25rem;color:var(--accent-ink);margin-top:.15rem}

.disclaimer,p.disclaimer{
  background:var(--warn-bg);border:1px solid var(--warn-line);border-radius:10px;
  padding:.8rem 1rem;font-size:.9rem;color:#5a4a1f;
}
.site-footer{max-width:var(--maxw);margin:0 auto;padding:0 1.25rem 2rem;color:var(--muted);font-size:.85rem}
.site-footer nav{display:flex;gap:.8rem;flex-wrap:wrap;margin:.8rem 0}
.site-footer nav a{color:var(--muted)}

[role="alert"]{max-width:var(--maxw);margin:1rem auto 0;border-radius:10px}

@media (max-width:560px){
  h1{font-size:1.55rem}
  .estimate strong{font-size:1.7rem}
  main{padding:.5rem 1rem 2.5rem}
  .form-grid,.result-grid,.facts{grid-template-columns:1fr}
  .site-header{align-items:flex-start}
}

@media (prefers-color-scheme:dark){
  :root{
    --bg:#0e1514;--surface:#15201f;--ink:#e8efed;--muted:#9fb0ad;
    --accent:#5eead4;--accent-ink:#7fe9d6;--button-ink:#062e2b;--line:#27332f;
    --warn-bg:#2a2410;--warn-line:#5c4f23;--shadow:none;
  }
  .brand{color:var(--ink)}
  thead th{background:#1b2725}
  tbody tr:nth-child(even){background:#172220}
  .chip-medium{background:#152a3a;color:#9cc4ee;border-color:#244a66}
  .chip-low{background:#33201b;color:#e7a795;border-color:#5c352b}
  .disclaimer,p.disclaimer{color:#e4d39a}
}