/* Minimal clean responsive CSS */
* {
  box-sizing: border-box;
}

body {
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  margin: 0;
  color: #0b1220;
  background-color: #fff;
  line-height: 1.6;
}

.container {
  max-width: 980px;
  margin: 0 auto;
  padding: 18px;
}

/* Header */
.site-header {
  background: #fff;
  color: #fafafa;
  padding: 12px 0;
  border-bottom: 1px solid #ddd;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.site-header .brand {
  margin: 0;
  font-weight: 700;
  font-size: 1.2rem;
}

.site-header nav a {
  color: #0b1220;
  text-decoration: none;
  margin-left: 18px;
  font-weight: 500;
  transition: color 0.2s;
}

.site-header nav a:hover {
  color: #0056b3;
}

/* Cards */
.cards {
  display: flex;
  gap: 18px;
  margin-top: 18px;
  flex-wrap: wrap;
}

.card {
  flex: 1;
  min-width: 220px;
  border: 1px solid #e3e6ef;
  padding: 16px;
  border-radius: 10px;
  background: #fafafa;
  box-shadow: 0 2px 5px rgba(0,0,0,0.05);
  transition: transform 0.2s, box-shadow 0.2s;
}

.card:hover {
  transform: translateY(-3px);
  box-shadow: 0 4px 10px rgba(0,0,0,0.1);
}

/* Footer */
.site-footer {
  background: #f9fafc;
  padding: 16px;
  margin-top: 28px;
  text-align: center;
  font-size: 0.9rem;
  color: #555;
  border-top: 1px solid #ddd;
}

/* Forms */
form label {
  display: block;
  margin: 10px 0 6px;
  font-weight: 500;
}

input, textarea {
  width: 100%;
  padding: 10px;
  border: 1px solid #ccd0db;
  border-radius: 6px;
  font-size: 1rem;
}

button {
  padding: 10px 18px;
  border-radius: 6px;
  border: 0;
  background: #0b1320;
  color: #fff;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s;
}

button:hover {
  background: #1a2640;
}

/* Mobile responsiveness */
@media (max-width: 640px) {
  .site-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .site-header nav {