/* Atividades suite — shared styles, mobile-first */
:root{--ink:#1f2430;--soft:#6b7280;--line:#e5e7eb;--brand:#2563eb;--brand2:#1e40af;
  --ok:#16a34a;--warn:#d97706;--bg:#f4f6fb;--card:#fff;--radius:14px}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:-apple-system,"Segoe UI",Roboto,Arial,sans-serif;color:var(--ink);
  background:var(--bg);line-height:1.55;-webkit-text-size-adjust:100%}
header.top{background:#fff;border-bottom:1px solid var(--line);padding:12px 16px;
  display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.logo{display:flex;align-items:center;gap:8px;font-weight:800;font-size:16px;text-decoration:none;color:var(--ink)}
.logo .mark{width:30px;height:30px;border-radius:8px;background:linear-gradient(135deg,var(--brand),var(--brand2));
  color:#fff;display:grid;place-items:center;font-size:15px}
.gennav{display:flex;gap:6px;flex-wrap:wrap;margin-left:auto}
.gennav a{font-size:12.5px;padding:6px 11px;border-radius:999px;text-decoration:none;
  color:var(--brand2);background:#eef2ff;border:1px solid #dbe3ff}
.gennav a.on{background:var(--brand);color:#fff;border-color:var(--brand)}
.wrap{max-width:1080px;margin:0 auto;padding:16px}
h1{font-size:22px;line-height:1.3;margin:8px 0 4px}
.sub{color:var(--soft);font-size:14px;margin-bottom:14px}
.cols{display:grid;grid-template-columns:1fr;gap:16px}
@media(min-width:900px){.cols{grid-template-columns:360px 1fr}}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:18px}
label{display:block;font-size:12px;color:var(--soft);margin:10px 0 4px}
input,select,textarea{width:100%;padding:10px;border:1px solid var(--line);border-radius:10px;
  font-size:15px;font-family:inherit;outline:none}
input:focus,textarea:focus,select:focus{border-color:var(--brand)}
.seg{display:flex;background:#eef2ff;border-radius:10px;padding:3px;gap:2px;flex-wrap:wrap}
.seg button{flex:1;border:none;background:none;padding:8px 6px;border-radius:8px;cursor:pointer;
  font-size:13px;font-weight:600;color:var(--brand2);min-width:64px}
.seg button.on{background:#fff;box-shadow:0 1px 3px rgba(0,0,0,.12)}
.btn{width:100%;border:none;border-radius:12px;padding:14px;font-size:16px;font-weight:800;
  cursor:pointer;margin-top:14px}
.btn.primary{background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff}
.btn.green{background:linear-gradient(135deg,#22c55e,#15803d);color:#fff}
.btn.ghost{background:#fff;border:1.5px solid var(--line);color:var(--ink)}
.btn:active{transform:translateY(1px)}
.btnrow{display:flex;gap:10px}
.btnrow .btn{margin-top:10px}
.chkrow{display:flex;align-items:center;gap:8px;font-size:13.5px;margin-top:12px;color:var(--ink)}
.chkrow input{width:17px;height:17px;accent-color:var(--brand)}
.hint{font-size:11.5px;color:var(--soft);margin-top:6px}
/* preview area */
.preview{overflow:auto}
.ws-grid{display:inline-block;border:2px solid #cbd5e1;border-radius:8px;padding:6px;background:#fff;user-select:none}
.ws-row{display:flex}
.ws-cell{width:30px;height:30px;display:grid;place-items:center;font-family:ui-monospace,Consolas,monospace;
  font-weight:700;font-size:15px;border-radius:6px;cursor:pointer}
@media(max-width:520px){.ws-cell{width:24px;height:24px;font-size:12.5px}}
.ws-cell.sel{background:#dbeafe}
.ws-cell.found{background:#bbf7d0;color:#14532d}
.wordlist{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}
.wordlist span{font-size:13px;padding:4px 12px;border-radius:999px;background:#eef2ff;color:var(--brand2);font-weight:600}
.wordlist span.done{background:#dcfce7;color:#15803d;text-decoration:line-through}
.congrats{display:none;margin-top:14px;padding:14px;border-radius:12px;background:#dcfce7;
  color:#14532d;font-weight:800;text-align:center;font-size:17px}
.share{display:flex;gap:10px;margin-top:14px;flex-wrap:wrap}
.share a{flex:1;min-width:150px;text-align:center;text-decoration:none;border-radius:11px;padding:12px;
  font-weight:700;font-size:14px}
.share .wa{background:#25d366;color:#fff}
.share .cp{background:#eef2ff;color:var(--brand2)}
/* cross links + faq + ad slots */
.related{margin-top:22px}
.related h2{font-size:16px;margin-bottom:10px}
.relgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:12px}
.relgrid a{display:block;background:#fff;border:1px solid var(--line);border-radius:12px;padding:14px;
  text-decoration:none;color:var(--ink)}
.relgrid a b{color:var(--brand2)}
.relgrid a span{font-size:12.5px;color:var(--soft);display:block;margin-top:3px}
.faq{margin-top:26px}
.faq h2{font-size:17px;margin-bottom:8px}
.faq details{background:#fff;border:1px solid var(--line);border-radius:10px;padding:12px 14px;margin-bottom:8px}
.faq summary{font-weight:700;font-size:14px;cursor:pointer}
.faq p{font-size:13.5px;color:var(--soft);margin-top:8px}
.ad-slot{min-height:0;margin:16px 0;display:none;place-items:center;background:#f8fafc;
  border:1px dashed #e2e8f0;border-radius:10px;color:#cbd5e1;font-size:11px}
.ad-slot.on{display:grid;min-height:100px}
footer{max-width:1080px;margin:26px auto;padding:0 16px 34px;font-size:12.5px;color:var(--soft);text-align:center}
footer a{color:var(--brand2)}