:root{--bg:#f7f8fb;--card:#ffffff;--ink:#1c2230;--muted:#5b6478;--accent:#3457d5;--accent2:#22b07d;--border:#e4e7f0;}
*{box-sizing:border-box}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;background:var(--bg);color:var(--ink);line-height:1.55}
header{background:var(--card);border-bottom:1px solid var(--border)}
.nav{max-width:960px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;padding:16px 20px}
.brand{font-weight:800;font-size:1.15rem;color:var(--ink);text-decoration:none}
.nav a.link{color:var(--muted);text-decoration:none;font-size:.95rem;margin-left:18px}
.nav a.link:hover{color:var(--ink)}
.wrap{max-width:960px;margin:0 auto;padding:28px 20px 60px}
h1{font-size:1.9rem;margin:.2rem 0 .6rem}
h2{font-size:1.3rem;margin-top:2.2rem}
h3{font-size:1.05rem;margin:1.6rem 0 .4rem}
p.lead{color:var(--muted);font-size:1.05rem;max-width:70ch}
main p,main li{max-width:70ch}
.card{background:var(--card);border:1px solid var(--border);border-radius:14px;padding:22px;box-shadow:0 1px 3px rgba(20,20,50,.04)}
textarea,input[type=text],input[type=number],select{width:100%;padding:12px 14px;border:1px solid var(--border);border-radius:10px;font-size:1rem;background:#fff;color:var(--ink);font-family:inherit}
textarea{min-height:150px;resize:vertical}
button{background:var(--accent);color:#fff;border:none;padding:12px 20px;border-radius:10px;font-size:1rem;font-weight:600;cursor:pointer}
button:hover{opacity:.92}
button.secondary{background:#eef0f7;color:var(--ink)}
:focus-visible{outline:3px solid var(--accent);outline-offset:2px}
.row{display:flex;gap:10px;flex-wrap:wrap;margin-top:14px}
.faq dt{font-weight:700;margin-top:14px}
.faq dd{margin:4px 0 0;color:var(--muted)}
.adslot{background:#eef0f7;border:1px dashed #c6cbe0;border-radius:10px;color:var(--muted);text-align:center;padding:18px;margin:22px 0;font-size:.85rem}
footer{border-top:1px solid var(--border);margin-top:40px;padding:26px 20px;color:var(--muted);font-size:.9rem}
footer .wrap{display:flex;flex-wrap:wrap;gap:16px;justify-content:space-between;align-items:center;padding:0}
footer a{color:var(--muted)}
small.note{color:var(--muted)}

/* Case converter specifics */
.fieldlabel{display:block;font-weight:700;margin-bottom:8px}
.caseset{margin-top:18px}
.caseset h3{margin:0 0 8px;font-size:.95rem;color:var(--muted);font-weight:700}
.cases{display:flex;flex-wrap:wrap;gap:8px}
.cases button{background:#eef0f7;color:var(--ink);font-weight:600;font-size:.95rem;padding:9px 14px;border-radius:9px}
.cases button[aria-pressed="true"]{background:var(--accent);color:#fff}
.toolbar{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px;align-items:center}
.toolbar button{padding:10px 16px;font-size:.95rem}
.stats{display:flex;flex-wrap:wrap;gap:6px 20px;margin-top:14px;color:var(--muted);font-size:.9rem}
.stats span strong{color:var(--ink)}
.replace{display:flex;gap:8px;flex-wrap:wrap;margin-top:10px}
.replace input{flex:1 1 180px;width:auto}
.replace button{flex:0 0 auto;padding:10px 16px;font-size:.95rem}
.status{margin-top:10px;font-size:.9rem;color:var(--accent2);min-height:1.2em;font-weight:600}
.reference{width:100%;border-collapse:collapse;margin-top:12px;font-size:.95rem}
.reference th,.reference td{text-align:left;padding:9px 10px;border-bottom:1px solid var(--border);vertical-align:top}
.reference th{color:var(--muted);font-weight:700}
.reference code{background:#eef0f7;border-radius:5px;padding:2px 6px}
@media (max-width:600px){
  h1{font-size:1.55rem}
  .card{padding:16px}
  .reference{font-size:.9rem}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}