/* LabReason — Minimal Light Theme */
:root{
  --bg: #ffffff;
  --ink: #0a0a0a;
  --muted: #5b6068;
  --line: #e7ebf0;
  --accent: #0f766e;
  --radius: 14px;
  --shadow: 0 1px 2px rgba(0,0,0,.04), 0 8px 24px rgba(3,7,18,.06);
}
*{box-sizing:border-box}
html,body{height:100%}
body{margin:0;background:var(--bg);color:var(--ink);
  font:16px/1.55 ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,"Apple Color Emoji","Segoe UI Emoji"}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:880px;margin:0 auto;padding:28px 20px 72px}
header{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}
.brand{display:flex;align-items:center;gap:10px}
.brand img{width:28px;height:28px}
.brand-name{font-weight:700;letter-spacing:.2px}
nav a{color:var(--muted);margin-left:16px}
nav a:hover,nav a.active{color:var(--ink)}
.hero{display:grid;grid-template-columns:1.2fr 1fr;gap:28px;align-items:center;
  padding:28px;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);background:#fff}
@media (max-width:880px){.hero{grid-template-columns:1fr}}
.tag{display:inline-block;font-size:12px;font-weight:700;letter-spacing:.3px;color:#fff;background:var(--accent);padding:6px 10px;border-radius:999px}
h1{font-size:clamp(28px,4vw,40px);line-height:1.1;margin:12px 0 10px}
.sub{color:var(--muted);margin:0 0 16px}
ul.clean{padding-left:18px;margin:10px 0 22px}
ul.clean li{margin:6px 0}
.panel{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:18px;box-shadow:var(--shadow)}
.form{display:grid;gap:12px}
label{font-size:14px;color:var(--muted)}
input,select,textarea{width:100%;padding:12px 14px;background:#fff;color:var(--ink);border:1px solid var(--line);border-radius:12px;outline:none}
input::placeholder{color:#9aa1a9}
input:focus,select:focus,textarea:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(15,118,110,.15)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;padding:12px 16px;border-radius:12px;border:1px solid var(--accent);background:var(--accent);color:#fff;font-weight:700;cursor:pointer}
.btn:hover{filter:brightness(0.96)}
.btn.ghost{background:#fff;color:var(--accent)}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:12px}
@media (max-width:640px){.grid-2{grid-template-columns:1fr}}
footer{margin-top:36px;color:var(--muted);font-size:13px}
small.mono{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;color:#7a818a}
hr{border:none;border-top:1px solid var(--line);margin:18px 0}
.center{text-align:center}
h2{margin:0 0 8px;font-size:20px}
.hide{display:none}