* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: #f4f6f8;
  color: #1f2937;
}
.container {
  width: min(430px, calc(100% - 32px));
  margin: 70px auto;
  background: white;
  border-radius: 14px;
  padding: 28px;
  box-shadow: 0 10px 30px rgba(0,0,0,.08);
}
.dashboard {
  width: min(760px, calc(100% - 32px));
}
h1 { margin-top: 0; font-size: 26px; }
label { display: block; margin-top: 14px; font-weight: 700; }
input {
  width: 100%;
  margin-top: 6px;
  padding: 12px;
  border: 1px solid #cbd5e1;
  border-radius: 10px;
  font-size: 15px;
}
button {
  width: 100%;
  margin-top: 18px;
  padding: 12px;
  border: 0;
  border-radius: 10px;
  background: #1f2937;
  color: white;
  font-weight: 700;
  cursor: pointer;
}
button:hover { background: #111827; }
a { color: #2563eb; text-decoration: none; }
.links { margin-top: 18px; display: grid; gap: 8px; }
.message {
  margin-top: 16px;
  padding: 12px;
  border-radius: 10px;
  display: none;
}
.message.show { display: block; }
.message.error { background: #fee2e2; color: #991b1b; }
.message.success { background: #dcfce7; color: #166534; }
.message.info { background: #dbeafe; color: #1e40af; }