/* ---------- Base reset & typography ---------- */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
body {
  font-family:
    system-ui,
    -apple-system,
    "Segoe UI",
    Roboto,
    sans-serif;
  line-height: 1.5;
  color: #1f2937;
  background: #f8fafc;
  padding: 2rem;
}
img {
  max-width: 100%;
  display: block;
}
a {
  color: #2563eb;
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}

/* ---------- Registration Form ---------- */
.auth {
  max-width: 420px;
  margin: 2rem auto;
  background: #fff;
  padding: 2rem;
  border-radius: 0.75rem;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.auth h1 {
  text-align: center;
  margin-bottom: 1rem;
}
.auth label {
  font-size: 0.875rem;
  font-weight: 600;
  margin-top: 0.5rem;
}
.auth input[type="text"],
.auth input[type="email"],
.auth input[type="password"] {
  padding: 0.75rem;
  border: 1px solid #d1d5db;
  border-radius: 0.5rem;
  font: inherit;
}
.check {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 400;
}
.auth button {
  margin-top: 1rem;
  padding: 0.75rem;
  background: #16a34a;
  color: #fff;
  border: 0;
  border-radius: 0.5rem;
  font-weight: 600;
  cursor: pointer;
}
.auth button:hover {
  background: #15803d;
}