:root {
  --bg: #f4f7fb;
  --card: #ffffff;
  --text: #1f2937;
  --muted: #6b7280;
  --border: #dbe3ee;
  --primary: #0f62fe;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  background: var(--bg);
  color: var(--text);
}
.container {
  max-width: 920px;
  margin: 0 auto;
  padding: 24px;
}
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 20px;
  margin-bottom: 18px;
  box-shadow: 0 8px 20px rgba(15, 23, 42, 0.05);
}
.hero h1 {
  margin-top: 0;
  margin-bottom: 10px;
}
.hero p, .notes p, li, small {
  color: var(--muted);
}
.field { margin-bottom: 16px; }
label {
  display: block;
  margin-bottom: 8px;
  font-weight: 700;
}
input[type="file"],
input[type="number"],
input[type="text"],
select {
  width: 100%;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 14px;
}
.grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
button {
  background: var(--primary);
  color: white;
  border: 0;
  padding: 12px 18px;
  border-radius: 10px;
  cursor: pointer;
  font-weight: 700;
}
button:hover { opacity: 0.92; }
.alert {
  border-color: #f59e0b;
  background: #fff7e6;
}
code {
  background: #eef2ff;
  padding: 2px 6px;
  border-radius: 6px;
}
@media (max-width: 720px) {
  .grid { grid-template-columns: 1fr; }
  .container { padding: 14px; }
}