:root { color-scheme: light; }
* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: Arial, sans-serif;
  line-height: 1.4;
}

.container {
  max-width: 820px;
  margin: 0 auto;
  padding: 40px 16px;
}

.header { margin-bottom: 16px; }
.subtitle { margin-top: 8px; opacity: 0.8; }

.card {
  border: 1px solid #ddd;
  border-radius: 12px;
  padding: 20px;
}

.form {
  display: grid;
  gap: 12px;
  margin-top: 12px;
}

label { display: grid; gap: 6px; }

input, textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid #ccc;
  border-radius: 10px;
  font: inherit;
}

button {
  padding: 10px 14px;
  border: 0;
  border-radius: 10px;
  cursor: pointer;
}

.hint { margin-top: 12px; opacity: 0.75; }

.footer { margin-top: 24px; opacity: 0.7; }

.hidden { display: none; }