// basic layout
body {
  font-family: Arial, Helvetica, sans-serif;
  background: #f0f0f0;
  color: #222;
  padding: 24px;
  line-height: 1.5;
}

.container {
  max-width: 960px; // simple width
  margin: 24px auto;
  background: #fff;
  padding: 24px;
  border: 1px solid #ccc;
}

// headings
h1, h2, h3 {
  font-weight: bold;
  color: #111;
  margin-bottom: 16px;
}

h2 {
  font-size: 20px;
  border-bottom: 1px solid #ccc;
  padding-bottom: 6px;
  margin-top: 24px;
}

// text
p {
  margin-bottom: 12px;
}

// forms
.form-group {
  margin-bottom: 16px;
}

label {
  display: block;
  font-size: 13px;
  margin-bottom: 6px;
}

input[type="text"],
input[type="file"],
select {
  width: 100%;
  font-size: 13px;
  padding: 6px 8px;
  border: 1px solid #aaa;
  background: #fff;
  margin-bottom: 12px;
}

// buttons
.btn,
button {
  font-size: 13px;
  padding: 6px 14px;
  border: 1px solid #666;
  background: #e0e0e0;
  color: #000;
  cursor: pointer;
  margin-right: 8px;
  margin-bottom: 8px;
}

.btn:hover,
button:hover {
  background: #d0d0d0;
}

// tables
table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
  font-size: 13px;
}

th, td {
  border: 1px solid #bbb;
  padding: 8px 10px;
  text-align: left;
}

// alerts
.warning,
.success,
.error,
.info {
  border: 1px solid #aaa;
  background: #f9f9f9;
  padding: 12px;
  margin: 16px 0;
  font-size: 13px;
}

// small screen tweaks
@media (max-width: 640px) {
  body { padding: 16px; }
  .container { padding: 16px; margin: 16px auto; }
  table { font-size: 12px; }
  th, td { padding: 6px 8px; }
}