:root{
    --bg:#FAFAF8; --panel:#FFFFFF; --panel-2:#F5F3EF; --line:#E7E2D9; --text:#1B1D22;
    --muted:#6B7178; --accent:#C75B12; --accent-soft:#FCE7D3; --accent-ink:#8A3F0C;
    --ok:#1E8A4E; --ok-soft:#DFF3E6; --warn:#A6720B; --warn-soft:#FBEFD3;
    --bad:#C0392B; --bad-soft:#FBE1DD; --info:#2563EB; --info-soft:#E1EAFD;
    --shadow:0 1px 2px rgba(20,16,8,.04), 0 8px 24px rgba(20,16,8,.05);
    --max:980px;
  }
  :root[data-theme="dark"]{
    --bg:#0E1116; --panel:#161B22; --panel-2:#1B212B; --line:#232A33; --text:#E6EAF0;
    --muted:#9BA6B4; --accent:#DB7A34; --accent-soft:#3A2718; --accent-ink:#F0A868;
    --ok:#3CB273; --ok-soft:#123422; --warn:#D9AE3E; --warn-soft:#3A2E10;
    --bad:#E06B58; --bad-soft:#3A1712; --info:#6C93EE; --info-soft:#16233F;
    --shadow:0 1px 2px rgba(0,0,0,.3), 0 8px 24px rgba(0,0,0,.35);
  }
  *{box-sizing:border-box}
  body{
    margin:0; background:var(--bg); color:var(--text);
    font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
    line-height:1.6; -webkit-font-smoothing:antialiased;
    transition:background .15s ease, color .15s ease;
  }
  .wrap{max-width:var(--max); margin:0 auto; padding:0 20px}
  a{color:var(--accent-ink)}

  header{border-bottom:1px solid var(--line); padding:16px 0; position:sticky; top:0; background:var(--bg); z-index:10}
  header .row{display:flex; align-items:center; justify-content:space-between}
  header .controls{display:flex; align-items:center; gap:8px}
  .logo{font-weight:700; font-size:18px; letter-spacing:-.2px}
  .logo span{color:var(--accent)}
  .theme-toggle{
    background:var(--panel); border:1px solid var(--line); border-radius:8px;
    width:36px; height:36px; padding:0; flex:none; display:flex; align-items:center; justify-content:center;
    cursor:pointer; color:var(--text);
  }
  .theme-toggle svg{width:18px; height:18px; flex:none}
  .theme-toggle .moon{display:none}
  :root[data-theme="dark"] .theme-toggle .sun{display:none}
  :root[data-theme="dark"] .theme-toggle .moon{display:block}
  .lang-select{
    background:var(--panel); border:1px solid var(--line); border-radius:8px;
    height:36px; padding:0 10px; color:var(--text); font-size:13px; font-weight:600;
    cursor:pointer;
  }

  .hero{padding:52px 0 28px; text-align:center}
  .badge{
    display:inline-block; background:var(--accent-soft); color:var(--accent-ink);
    font-size:13px; font-weight:600; padding:6px 14px; border-radius:20px; margin-bottom:18px;
  }
  .hero h1{font-size:clamp(28px,4.5vw,44px); line-height:1.14; margin:0 0 16px; letter-spacing:-1px; font-weight:700}
  .hero p{color:var(--muted); font-size:17px; margin:0 auto 28px; max-width:620px}

  form{display:flex; gap:10px; max-width:620px; margin:0 auto; flex-wrap:wrap}
  input[type=url], input[type=text]{
    flex:1 1 320px; background:var(--panel); border:1px solid var(--line);
    color:var(--text); padding:14px 16px; border-radius:8px; font-size:16px;
  }
  input[type=url]:focus, input[type=text]:focus{outline:none; border-color:var(--accent)}
  button{
    background:var(--accent); color:#fff; border:0; padding:14px 28px;
    border-radius:8px; font-weight:600; font-size:15px; cursor:pointer;
  }
  button:hover:not(:disabled){filter:brightness(0.92)}
  button:disabled{opacity:.55; cursor:default}

  .status{text-align:center; color:var(--muted); margin:22px 0; min-height:24px}
  .status.error{color:var(--bad)}

  .statbar{
    display:flex; justify-content:center; flex-wrap:wrap; gap:10px 28px;
    color:var(--muted); font-size:13px; margin:0 0 8px; padding:0;
  }
  .statbar > div{display:flex; gap:5px; align-items:baseline}
  .statbar dt{font-weight:400; margin:0}
  .statbar dt::after{content:":"}
  .statbar dd{margin:0; color:var(--text); font-weight:700}
  .statbar b{color:var(--text)}
  .livecount{
    text-align:center; margin:18px 0 0; font-size:13px; color:var(--muted);
  }
  .livecount .dot{
    display:inline-block; width:7px; height:7px; border-radius:50%;
    background:var(--ok); margin-right:6px; vertical-align:middle;
  }
  .livecount b{color:var(--text); font-variant-numeric:tabular-nums}

  section.block{padding:52px 0; border-top:1px solid var(--line)}
  section.block h2{font-size:26px; letter-spacing:-.4px; margin:0 0 8px; text-align:center}
  section.block > .lede{color:var(--muted); text-align:center; max-width:600px; margin:0 auto 36px; font-size:16px}

  .steps{display:grid; grid-template-columns:repeat(3,1fr); gap:24px}
  .steps .step{text-align:center}
  .steps .n{
    width:36px; height:36px; border-radius:50%; background:var(--accent-soft); color:var(--accent-ink);
    display:flex; align-items:center; justify-content:center; font-weight:700; margin:0 auto 14px;
  }
  .steps h3{font-size:16px; margin:0 0 6px}
  .steps p{color:var(--muted); font-size:14px; margin:0}

  .cards{display:grid; grid-template-columns:repeat(3,1fr); gap:20px}
  .card{
    background:var(--panel); border:1px solid var(--line); border-radius:12px;
    padding:24px; box-shadow:var(--shadow);
  }
  .card .kicker{
    display:inline-block; font-size:12px; font-weight:700; letter-spacing:.5px;
    padding:3px 9px; border-radius:5px; margin-bottom:12px;
  }
  .card.seo .kicker{background:var(--info-soft); color:var(--info)}
  .card.aeo .kicker{background:var(--ok-soft); color:var(--ok)}
  .card.geo .kicker{background:var(--accent-soft); color:var(--accent-ink)}
  .card h3{margin:0 0 8px; font-size:17px}
  .card p{color:var(--muted); font-size:14px; margin:0}

  table.grades{width:100%; border-collapse:collapse; font-size:14px}
  table.grades th, table.grades td{text-align:left; padding:10px 14px; border-bottom:1px solid var(--line)}
  table.grades th{color:var(--muted); font-weight:600; font-size:12px; text-transform:uppercase; letter-spacing:.4px}
  table.grades td.grade{font-weight:700; font-variant-numeric:tabular-nums}
  .grade-tbl-wrap{
    background:var(--panel); border:1px solid var(--line); border-radius:12px;
    overflow:hidden; box-shadow:var(--shadow); max-width:720px; margin:0 auto;
  }

  .faq{max-width:720px; margin:0 auto}
  .faq details{
    background:var(--panel); border:1px solid var(--line); border-radius:10px;
    padding:16px 18px; margin-bottom:10px;
  }
  .faq summary{cursor:pointer; font-weight:600; font-size:15px; list-style:none}
  .faq summary::-webkit-details-marker{display:none}
  .faq summary::after{content:"+"; float:right; color:var(--muted); font-weight:400}
  .faq details[open] summary::after{content:"−"}
  .faq p{color:var(--muted); font-size:14px; margin:10px 0 0}

  .checklist-grid{display:grid; grid-template-columns:repeat(3,1fr); gap:16px; max-width:900px; margin:0 auto}
  .checkgroup{
    background:var(--panel); border:1px solid var(--line); border-radius:10px;
    padding:16px 18px; box-shadow:var(--shadow);
  }
  .checkgroup summary{cursor:pointer; font-weight:700; font-size:14px; list-style:none}
  .checkgroup summary::-webkit-details-marker{display:none}
  .checkgroup summary::after{content:"+"; float:right; color:var(--muted); font-weight:400}
  .checkgroup[open] summary::after{content:"−"}
  .checkgroup ul{margin:12px 0 0; padding:0 0 0 18px; color:var(--muted); font-size:13.5px; line-height:1.7}
  .checkgroup li{margin-bottom:4px}

  .case-study{
    background:var(--panel); border:1px solid var(--line); border-radius:12px;
    padding:28px 30px; max-width:720px; margin:0 auto; box-shadow:var(--shadow);
  }
  .case-study .before-after{display:flex; gap:24px; justify-content:center; margin:18px 0; flex-wrap:wrap}
  .case-study .stat{text-align:center}
  .case-study .stat .n{font-size:28px; font-weight:700; font-variant-numeric:tabular-nums}
  .case-study .stat .n.before{color:var(--bad)}
  .case-study .stat .n.after{color:var(--ok)}
  .case-study .stat .lbl{color:var(--muted); font-size:12px; text-transform:uppercase; letter-spacing:.4px; margin-top:2px}
  .case-study .arrow{align-self:center; color:var(--muted); font-size:22px}
  .case-study p{color:var(--text); font-size:15px; margin:0 0 12px}
  .case-study ul{color:var(--muted); font-size:14px; margin:0 0 12px; padding-left:20px}
  .case-study li{margin-bottom:4px}

  .evidence{
    background:var(--panel-2); border:1px solid var(--line); border-radius:8px;
    padding:14px 16px; font-family:ui-monospace,Menlo,monospace; font-size:12.5px;
    color:var(--text); overflow-x:auto; margin:12px 0;
  }
  .evidence .cmd{color:var(--muted)}

  @media (max-width:760px){
    .checklist-grid{grid-template-columns:1fr}
  }

  .why{
    background:var(--panel-2); border:1px solid var(--line); border-radius:12px;
    padding:28px 30px; max-width:720px; margin:0 auto;
  }
  .why p{color:var(--text); font-size:15px; margin:0 0 12px}
  .why p:last-child{margin-bottom:0}
  .why strong{color:var(--accent-ink)}

  /* ── Results ─────────────────────────────────────────────────────── */

  #results{padding-top:8px}
  .scores{display:flex; gap:18px; justify-content:center; flex-wrap:wrap; margin:36px 0 8px}
  .score{
    background:var(--panel); border:1px solid var(--line); border-radius:12px;
    padding:22px 18px; width:180px; text-align:center; box-shadow:var(--shadow);
  }
  .dial{position:relative; width:104px; height:104px; margin:0 auto 12px}
  .dial svg{transform:rotate(-90deg)}
  .dial .val{
    position:absolute; inset:0; display:flex; flex-direction:column; align-items:center;
    justify-content:center;
  }
  .dial .val b{font-size:24px; font-weight:700; line-height:1}
  .dial .val .grade{font-size:11px; font-weight:700; margin-top:2px; letter-spacing:.4px}
  .score .name{font-weight:600; font-size:15px}
  .score .sub{color:var(--muted); font-size:13px; margin-top:2px}

  .overall{text-align:center; color:var(--muted); margin:6px 0 28px; font-size:14px}
  .overall strong{color:var(--text); font-size:17px}

  .cwv{
    background:var(--panel); border:1px solid var(--line); border-radius:12px;
    padding:18px 20px; margin:0 0 26px; box-shadow:var(--shadow);
  }
  .cwv h2{margin:0 0 4px; font-size:15px; font-weight:600}
  .cwv .src{color:var(--muted); font-size:13px; margin:0 0 12px}
  .cwv .metrics{display:flex; gap:26px; flex-wrap:wrap}
  .cwv .metric b{display:block; font-size:19px; font-weight:700}
  .cwv .metric span{color:var(--muted); font-size:12px; text-transform:uppercase; letter-spacing:.6px}

  .filters{display:flex; gap:8px; flex-wrap:wrap; margin:0 0 18px}
  .filters button{
    background:var(--panel); border:1px solid var(--line); color:var(--muted);
    padding:7px 14px; font-size:13px; font-weight:600; border-radius:20px;
  }
  .filters button[aria-pressed=true]{background:var(--accent); border-color:var(--accent); color:#fff}

  .issue{
    background:var(--panel); border:1px solid var(--line); border-left-width:3px;
    border-radius:8px; padding:14px 16px; margin-bottom:10px;
  }
  .issue.critical{border-left-color:var(--bad)}
  .issue.high{border-left-color:#D4703A}
  .issue.medium{border-left-color:var(--warn)}
  .issue.low{border-left-color:var(--muted)}
  .issue.pass{border-left-color:var(--ok)}
  .issue.info{border-left-color:var(--info)}
  .issue .top{display:flex; gap:10px; align-items:baseline; flex-wrap:wrap}
  .tag{
    font-size:11px; font-weight:700; letter-spacing:.5px; text-transform:uppercase;
    padding:2px 7px; border-radius:4px; background:var(--panel-2); color:var(--muted);
  }
  .issue .msg{font-weight:600; font-size:15px}
  .issue .fix{color:var(--muted); font-size:14px; margin-top:6px}
  .issue .id{color:var(--muted); font-size:12px; font-family:ui-monospace,Menlo,monospace}

  .lead{
    background:linear-gradient(180deg,var(--panel-2),var(--panel)); border:1px solid var(--line);
    border-radius:12px; padding:28px; margin:36px 0; text-align:center;
  }
  .lead h2{margin:0 0 8px; font-size:22px}
  .lead p{color:var(--muted); margin:0 auto 20px; max-width:480px}
  .lead form{max-width:460px}
  .lead .done{color:var(--ok); font-weight:600}

  .history{margin:34px 0}
  .history-head{display:flex; align-items:center; justify-content:space-between; margin:0 0 10px}
  .history .history-title{font-size:14px; color:var(--muted); font-weight:600; margin:0}
  .history-clear{
    background:none; border:0; color:var(--muted); font-size:12px; padding:2px 0;
    text-decoration:underline; cursor:pointer; font-weight:400;
  }
  .history-clear:hover{color:var(--accent-ink)}
  .history a{color:var(--accent-ink); text-decoration:none; font-size:14px; display:block; padding:3px 0}
  .history a:hover{text-decoration:underline}

  footer{border-top:1px solid var(--line); margin-top:20px; padding:26px 0 40px; color:var(--muted); font-size:13px; text-align:center}
  footer a{color:var(--muted)}
  .footer-nav{margin:0 0 14px; font-size:13px}
  .footer-nav a{color:var(--muted); text-decoration:none}
  .footer-nav a:hover{color:var(--accent-ink); text-decoration:underline}
  .hidden{display:none}

  @media (max-width:760px){
    .steps, .cards{grid-template-columns:1fr}
    .score{width:150px} .dial{width:88px;height:88px}
  }