:root{
  --bg:#f4f6f9;
  --card:#ffffff;
  --text:#111827;
  --muted:#6b7280;
  --primary:#111827;
  --shadow: 0 8px 20px rgba(0,0,0,0.08);
  --radius: 12px;
}

*{ box-sizing:border-box; }
body{
  margin:0;
  font-family: Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}

header{
  background: var(--primary);
  color:#fff;
  padding: 28px 16px;
  text-align:center;
}

header h1{
  margin:0;
  font-size: 32px;
  letter-spacing: .5px;
}

header p{
  margin: 10px 0 0;
  opacity: .9;
}

.container{
  max-width: 1000px;
  margin: 32px auto;
  padding: 0 16px;
}

.grid{
  display:grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
}

.card{
  background: var(--card);
  padding: 18px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  text-align:center;
}

.card a{
  display:block;
  text-decoration:none;
  font-weight: 700;
  color: var(--text);
  padding: 10px;
}

.card a:hover{
  text-decoration: underline;
}

.page-title{
  margin: 0 0 8px;
  font-size: 24px;
}

.lead{
  margin: 0 0 18px;
  color: var(--muted);
  line-height: 1.5;
}

.form{
  display:grid;
  gap: 10px;
  margin-top: 14px;
}

input, button{
  width:100%;
  padding: 12px;
  border-radius: 10px;
  border: 1px solid #d1d5db;
  font-size: 16px;
}

button{
  background:#2563eb;
  color:#fff;
  border:none;
  cursor:pointer;
  font-weight: 700;
}

button:hover{ filter: brightness(0.95); }

.result{
  margin-top: 12px;
  font-weight: 700;
  padding: 12px;
  border-radius: 10px;
  background: #eef2ff;
}

.small{
  color: var(--muted);
  font-size: 14px;
  line-height: 1.5;
}

.breadcrumb{
  margin-bottom: 16px;
}

.breadcrumb a{
  color:#2563eb;
  text-decoration:none;
}

.breadcrumb a:hover{ text-decoration: underline; }

footer{
  text-align:center;
  padding: 20px;
  background:#e5e7eb;
  margin-top: 40px;
}