/* ================= AI Humanizer — light theme (Sigline-style) ================= */
:root{
  --bg:#FAF9F6;
  --panel:#ffffff;
  --panel-2:#F5F3EE;
  --input:#ffffff;
  --border:#E8E2D6;
  --text:#1a1a1a;
  --heading:#111111;
  --muted:#6F6A63;
  --accent:#6c5ce7;
  --accent-2:#8b7bff;
  --radius:16px;
  --green:#1e7d4f;
  --amber:#b26a00;
  --red:#b3261e;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;color:var(--text);
  font-family:'Inter',system-ui,-apple-system,'Segoe UI',Roboto,sans-serif;
  background:
    radial-gradient(900px 420px at 15% -5%, rgba(108,92,231,.07), transparent 60%),
    radial-gradient(800px 380px at 90% 0%, rgba(245,185,66,.08), transparent 60%),
    var(--bg);
  min-height:100vh;
}
a{color:var(--accent)}
h1{font-size:clamp(28px,4vw,44px);font-weight:800;letter-spacing:-.03em;margin:0 0 10px;color:var(--heading)}
h2{font-size:22px;font-weight:800;letter-spacing:-.02em;margin:0 0 8px;color:var(--heading)}
h3{font-size:16px;font-weight:700;margin:0 0 6px;color:var(--heading)}
p{line-height:1.6}
.muted{color:var(--muted)}
.small{font-size:13px}
.center{text-align:center}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:50;backdrop-filter:blur(14px);background:rgba(250,249,246,.88);border-bottom:1px solid var(--border)}
.header-inner{max-width:1080px;margin:0 auto;padding:14px 24px;display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap}
.brand{display:flex;align-items:baseline;gap:10px;flex-wrap:wrap;text-decoration:none}
.logo{font-size:22px;font-weight:800;letter-spacing:-.02em;color:var(--heading)}
.logo .spark{color:var(--accent)}
.tagline{color:var(--muted);font-size:13px}
.nav{display:flex;gap:6px;align-items:center;flex-wrap:wrap}
.nav-link{color:var(--text);text-decoration:none;font-weight:600;font-size:14px;padding:8px 12px;border-radius:10px}
.nav-link:hover{background:#F5F3EE}
.nav-link.active{color:var(--accent);background:rgba(108,92,231,.08)}
.tab{display:inline-block;font-weight:700;font-size:14px;color:#fff;text-decoration:none;background:linear-gradient(135deg,var(--accent),#5a4bd1);border-radius:10px;padding:9px 18px;box-shadow:0 4px 14px rgba(108,92,231,.30);white-space:nowrap}
.tab:hover{box-shadow:0 6px 20px rgba(108,92,231,.45);color:#fff}

/* ---------- layout ---------- */
.wrap{max-width:1080px;margin:0 auto;padding:40px 24px 24px}
.hero{padding:48px 24px 8px}
.hero p{color:var(--muted);font-size:16px;max-width:640px;margin:0}
.hero-kicker{margin-top:10px!important;font-size:13px!important;color:var(--accent)!important;font-weight:600}
.panel{background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);padding:22px;box-shadow:0 1px 4px rgba(60,50,35,.05)}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:18px}
@media (max-width:760px){.grid-2{grid-template-columns:1fr}.hero{padding-top:32px}}
.tool-card{display:block;background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);padding:22px;text-decoration:none;color:var(--text);box-shadow:0 1px 3px rgba(60,50,35,.06)}
.tool-card:hover{border-color:var(--accent);box-shadow:0 4px 14px rgba(108,92,231,.12)}
.tool-card h3{font-size:18px}
.tool-card p{font-size:14px;color:var(--muted);margin:0 0 10px}
.tool-card .go{font-weight:700;font-size:14px;color:var(--accent)}
.section{margin-top:36px}
.how-list{margin:0;padding-left:20px;line-height:1.7;color:var(--text)}
.how-list li{margin-bottom:6px}
.honest-box{background:#FFF8E6;border:1px solid #F0DFB0;border-radius:12px;padding:16px 18px;font-size:14px;line-height:1.6}
.honest-box strong{color:#7a5b00}

/* ---------- forms ---------- */
label{display:block;font-size:13px;font-weight:600;margin-bottom:6px;color:#4a453e}
textarea{
  width:100%;font:inherit;font-size:15px;line-height:1.6;color:var(--text);
  background:var(--input);border:1px solid var(--border);border-radius:10px;
  padding:12px;outline:none;resize:vertical;min-height:180px;
}
textarea:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(108,92,231,.15)}
.btn{font:inherit;font-weight:600;font-size:14px;border:1px solid transparent;border-radius:10px;padding:11px 20px;cursor:pointer;color:var(--text);background:transparent}
.btn:active{transform:translateY(1px)}
.btn.primary{background:linear-gradient(135deg,var(--accent),#5a4bd1);color:#fff;box-shadow:0 6px 20px rgba(108,92,231,.30)}
.btn.primary:hover{box-shadow:0 8px 26px rgba(108,92,231,.45)}
.btn.primary:disabled{opacity:.6;cursor:wait;box-shadow:none}
.btn.ghost{border-color:var(--border);background:#fff}
.btn.ghost:hover{background:#F5F3EE}
.btnrow{display:flex;gap:10px;flex-wrap:wrap;align-items:center;margin-top:14px}
.count{font-size:13px;color:var(--muted)}
.tone-row{display:flex;gap:8px;flex-wrap:wrap;margin:0 0 14px}
.tone{border:1px solid var(--border);background:#fff;border-radius:999px;padding:8px 16px;font:inherit;font-size:14px;font-weight:600;cursor:pointer;color:var(--text)}
.tone.active{background:var(--accent);border-color:var(--accent);color:#fff}
.status{font-size:13px;color:var(--muted);margin-top:10px;min-height:18px}
.status.error{color:var(--red)}

/* ---------- detector results ---------- */
.score-wrap{display:flex;gap:20px;align-items:center;flex-wrap:wrap;margin:6px 0 14px}
.gauge{position:relative;width:120px;height:120px;flex:0 0 auto}
.gauge svg{transform:rotate(-90deg)}
.gauge .num{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center}
.gauge .num b{font-size:30px;font-weight:800}
.gauge .num span{font-size:11px;color:var(--muted);font-weight:600}
.verdict{font-size:20px;font-weight:800}
.verdict.human{color:var(--green)}
.verdict.mixed{color:var(--amber)}
.verdict.ai{color:var(--red)}
.verdict-sub{color:var(--muted);font-size:14px;max-width:420px;margin-top:4px}
.signals{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:10px;margin-top:14px}
.signal{background:var(--panel-2);border:1px solid var(--border);border-radius:10px;padding:12px}
.signal b{display:block;font-size:18px}
.signal span{font-size:12px;color:var(--muted)}
.sentences{margin-top:16px;line-height:1.9}
.sent{border-radius:6px;padding:2px 4px;cursor:default}
.sent.low{background:rgba(30,125,79,.12)}
.sent.mid{background:rgba(178,106,0,.14)}
.sent.high{background:rgba(179,38,30,.13)}
.legend{display:flex;gap:14px;flex-wrap:wrap;font-size:12px;color:var(--muted);margin-top:10px}
.legend i{display:inline-block;width:12px;height:12px;border-radius:3px;margin-right:4px;vertical-align:-1px}
.hidden{display:none!important}
.linklike{background:none;border:none;padding:0;cursor:pointer;color:var(--accent);font:inherit;font-size:inherit;text-decoration:underline}

/* ---------- footer ---------- */
.site-footer{border-top:1px solid var(--border);margin-top:48px}
.footer-inner{max-width:1080px;margin:0 auto;padding:24px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13px;color:var(--muted)}
.footer-inner a{color:var(--muted);text-decoration:none}
.footer-inner a:hover{color:var(--accent)}