body {
  font-family: Arial, sans-serif;
  background: #f6f7fb;
  color: #222;
  margin: 0;
  padding: 30px;
}
.container {
  max-width: 650px;
  margin: 0 auto;
  background: #fff;
  padding: 28px;
  border-radius: 10px;
  box-shadow: 0 2px 10px rgba(0,0,0,.08);
}
.container.wide { max-width: 1100px; }
h1 { margin-top: 0; }
label { display: block; font-weight: bold; margin-top: 18px; }
small { display: block; color: #555; margin: 4px 0 8px; line-height: 1.4; }
input, select, textarea {
  width: 100%;
  box-sizing: border-box;
  padding: 10px;
  border: 1px solid #bbb;
  border-radius: 6px;
  font-size: 16px;
}
textarea { resize: vertical; }
button {
  margin-top: 22px;
  padding: 12px 18px;
  border: none;
  border-radius: 6px;
  background: #1f6feb;
  color: white;
  font-size: 16px;
  cursor: pointer;
}
button:hover { background: #185abc; }
nav { margin-bottom: 20px; }
.error { color: #b00020; font-weight: bold; }
.success { color: #0a7a28; font-weight: bold; }
.checkbox-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 8px;
  margin-top: 8px;
}
.checkbox-label {
  font-weight: normal;
  margin: 0;
  display: flex;
  align-items: center;
  gap: 8px;
}
.checkbox-label input { width: auto; }
table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 18px;
  background: #fff;
}
th, td {
  border: 1px solid #ddd;
  padding: 9px;
  text-align: left;
  vertical-align: top;
}
th { background: #f0f2f5; }