:root{
  --primary:#0f766e;
  --bg:#f3f5f6;
  --card:#ffffff;
  --text:#0f172a;
  --muted:#475569;
  --border:#e5e7eb;
  --shadow: 0 10px 25px rgba(0,0,0,0.06);
  --radius:14px;
}

*{box-sizing:border-box;}
body{
  margin:0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  color:var(--text);
  background:var(--bg);
}
a{color:inherit;}
.header{
  background:#ffffff;
  padding:38px 20px 26px;
  text-align:center;
}
.brand-title{
  font-size:48px;
  margin:0 0 10px;
  letter-spacing:0.2px;
}
.brand-subtitle{
  margin:0;
  color:#111827;
  font-size:18px;
}
.navbar{
  background:var(--primary);
  padding:14px 16px;
}
.navbar .nav{
  display:flex;
  justify-content:center;
  gap:34px;
  flex-wrap:wrap;
  align-items:center;
}
.navbar a{
  color:#fff;
  text-decoration:none;
  font-weight:700;
}
.navbar a.active{
  text-decoration:underline;
  text-underline-offset:6px;
}
.container{
  max-width:1200px;
  margin:0 auto;
  padding:26px 18px 40px;
}
.page-title{
  font-size:36px;
  margin:10px 0 18px;
}
.grid{
  display:grid;
  grid-template-columns: repeat(4, minmax(240px, 1fr));
  gap:20px;
}
@media (max-width: 1100px){
  .grid{grid-template-columns: repeat(2, minmax(240px, 1fr));}
}
@media (max-width: 560px){
  .grid{grid-template-columns: 1fr;}
  .brand-title{font-size:36px;}
}
.card{
  background:var(--card);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
  padding:18px;
  border:1px solid rgba(0,0,0,0.03);
}
.card h3{
  margin:0 0 12px;
  font-size:22px;
}
.field{
  width:100%;
  padding:10px 12px;
  border:1px solid var(--border);
  border-radius:10px;
  font-size:14px;
  outline:none;
  background:#fff;
}
.field:focus{border-color: rgba(15,118,110,0.55); box-shadow:0 0 0 3px rgba(15,118,110,0.12);}
.row{display:flex; gap:10px;}
.row > *{flex:1;}
.btn{
  display:inline-block;
  background:var(--primary);
  color:#fff;
  border:none;
  border-radius:10px;
  padding:10px 16px;
  font-weight:700;
  cursor:pointer;
}
.btn:active{transform:translateY(1px);}
.out{
  margin-top:12px;
  padding:10px 12px;
  border-radius:10px;
  background:#f8fafc;
  border:1px solid var(--border);
  color:var(--muted);
  min-height:42px;
  white-space:pre-wrap;
}
.footer{
  text-align:center;
  padding:22px 10px 32px;
  color:#111827;
}
.footer a{
  color:#4c1d95;
  text-decoration:underline;
}
.footer .mini{margin-top:6px; color:#111827;}



/* Brand logo sizing (wide logo support) */
.site-logo{
  width: 280px;
  max-width: 90vw;
  height: auto;
  display: block;
  margin: 0 auto 14px;
}
@media (max-width: 768px){
  .site-logo{ width: 190px; }
}