:root{
  --bg:#0b0b0c;
  --card:#141416;
  --card-2:#1a1a1e;
  --border:#242428;
  --border-strong:#2e2e33;
  --text:#f2f2f3;
  --muted:#9a9aa0;
  --dim:#6e6e73;
  --accent:#e8e8ea;
  --green:#b7ff6a;
  --radius:14px;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family: ui-sans-system, -apple-system, "Segoe UI", Inter, Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height:1.5;
  min-height:100vh;
  display:flex; flex-direction:column;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit}
.hidden{display:none!important}
/* topbar */
.topbar{position:sticky;top:0;z-index:10;background:rgba(11,11,12,.85);backdrop-filter:blur(10px);border-bottom:1px solid var(--border)}
.topbar-inner{max-width:980px;margin:0 auto;padding:12px 20px;display:flex;align-items:center;justify-content:space-between;gap:16px}
.brand{font-weight:700;letter-spacing:-.4px;font-size:16px}
.brand span{font-weight:400;color:var(--muted)}
.nav{display:flex;gap:10px;align-items:center}
.btn{border:1px solid var(--border-strong);background:var(--card);color:var(--text);padding:8px 14px;border-radius:999px;font:inherit;font-size:13px;font-weight:600;cursor:pointer}
.btn:hover{border-color:#3a3a40}
.btn-primary{background:var(--text);color:#0b0b0c;border-color:var(--text)}
.btn-primary:hover{opacity:.92}
.btn:disabled{opacity:.5;cursor:not-allowed}
.container{max-width:760px;width:100%;margin:0 auto;padding:48px 20px 64px;flex:1}
/* hero */
.hero{text-align:center;padding:42px 0 10px}
.hero h1{font-size: clamp(28px,5vw,42px);font-weight:800;letter-spacing:-1.2px;margin:0 0 10px;line-height:1.05}
.hero h1 em{font-style:normal;font-weight:300;color:var(--muted)}
.hero-sub{color:var(--muted);font-size:15px;max-width:520px;margin:0 auto 28px}
.search-wrap{max-width:640px;margin:0 auto;position:relative}
.search-box{display:flex;gap:10px;align-items:center;background:var(--card);border:1px solid var(--border-strong);border-radius:16px;padding:8px 8px 8px 16px;transition:border-color .15s, box-shadow .15s}
.search-box:focus-within{border-color:#3a3a40;box-shadow:0 0 0 4px rgba(255,255,255,.04)}
.search-box input{flex:1;background:transparent;border:none;outline:none;color:var(--text);font-size:15px;padding:8px 0}
.search-box input::placeholder{color:var(--dim)}
.examples{margin:22px auto 0;max-width:640px;text-align:left}
.examples-label{font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--dim);margin:0 0 10px}
.example{font-size:13.5px;color:var(--muted);padding:10px 14px;border:1px solid var(--border);border-radius:12px;margin-bottom:8px;cursor:pointer;background:var(--card)}
.example:hover{border-color:var(--border-strong);color:var(--text)}
/* investigation */
.q-head{margin-bottom:18px}
.q-head h1{font-size:22px;line-height:1.3;letter-spacing:-.4px;margin:0}
.meta{color:var(--dim);font-size:12.5px;margin-top:6px}
.progress-steps{display:flex;flex-wrap:wrap;gap:8px;margin:14px 0 20px}
.step{font-size:12px;padding:6px 10px;border-radius:999px;border:1px solid var(--border);color:var(--dim);background:var(--card)}
.step.done{color:var(--text);border-color:#2a2a2e;background:var(--card-2)}
.step.active{color:#0b0b0c;background:var(--text);border-color:var(--text)}
.badge{font-size:11px;letter-spacing:.06em;text-transform:uppercase;padding:5px 9px;border-radius:999px;border:1px solid var(--border);color:var(--muted)}
.badge.strong{background:#b7ff6a;color:#0b0b0c;border-color:#b7ff6a}
.badge.mixed{background:#ffd166;color:#0b0b0c;border-color:#ffd166}
.badge.weak{color:var(--muted)}
.card{background:var(--card);border:1px solid var(--border);border-radius:16px;padding:18px;margin-bottom:14px}
.card h3{margin:0 0 8px;font-size:14px;letter-spacing:.04em;text-transform:uppercase;color:var(--muted)}
.card p{margin:0;color:var(--text);font-size:14.5px;line-height:1.6}
.finding{padding:14px 16px;border-left:3px solid var(--border-strong);background:var(--card);border-radius:12px;margin-bottom:10px}
.finding.high{border-left-color:#b7ff6a}
.finding.medium{border-left-color:#ffd166}
.finding.low{border-left-color:#ff8a5b}
.finding small{color:var(--dim);font-size:12px}
.sources{display:grid;gap:10px}
.source{padding:12px 14px;border:1px solid var(--border);border-radius:12px;background:var(--card)}
.source a{color:var(--text);text-decoration:none;border-bottom:1px solid var(--border-strong)}
.source a:hover{border-bottom-color:var(--text)}
.source .domain{color:var(--dim);font-size:12px}
.claim{padding:14px 16px;border:1px solid var(--border);border-radius:12px;margin-bottom:10px;background:var(--card)}
.claim-head{display:flex;gap:8px;align-items:center;margin-bottom:6px;flex-wrap:wrap}
.footer{max-width:980px;margin:0 auto;padding:24px 20px;color:var(--dim);font-size:12px;text-align:center;border-top:1px solid var(--border)}
/* forms */
.field{display:block;width:100%;background:var(--card);border:1px solid var(--border-strong);color:var(--text);padding:11px 14px;border-radius:12px;font:inherit;font-size:14px}
.field:focus{outline:2px solid #2a2a2e;outline-offset:1px}
.form{max-width:420px;margin:0 auto}
.form h2{font-size:20px;margin:0 0 14px}
.form .row{margin-bottom:12px}
.form label{font-size:13px;color:var(--muted);display:block;margin-bottom:6px}
.alert{padding:10px 12px;border-radius:10px;font-size:13px;margin-bottom:12px}
.alert.err{background:rgba(255,84,112,.1);border:1px solid rgba(255,84,112,.3);color:#ff8aa0}
.alert.ok{background:rgba(183,255,106,.08);border:1px solid rgba(183,255,106,.25);color:#b7ff6a}
.history-list{display:grid;gap:10px}
.hist{padding:14px 16px;border:1px solid var(--border);border-radius:12px;background:var(--card);cursor:pointer}
.hist:hover{border-color:var(--border-strong)}
.hist time{color:var(--dim);font-size:12px}