* { box-sizing: border-box; }
body {
  font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  background: linear-gradient(140deg, #eef2ff 0%, #f8fafc 100%);
  min-height: 100vh; margin: 0; padding: 2rem 1rem;
  display: grid; place-items: center; color: #1f2937;
}
.card {
  width: 100%; max-width: 420px; background: #fff;
  padding: 2rem 1.75rem; border-radius: 16px;
  box-shadow: 0 10px 30px rgba(15, 23, 42, 0.08);
}
.card h1 { margin: 0 0 .35rem; font-size: 1.5rem; }
.sub { color: #6b7280; margin: 0 0 1.25rem; }
.tag {
  display: inline-block; padding: .15rem .55rem; background: #eef2ff;
  color: #4338ca; border-radius: 999px; font-size: .75rem; margin-bottom: .5rem;
}
form { display: grid; gap: .9rem; }
label { display: grid; gap: .35rem; font-size: .875rem; color: #374151; }
input {
  padding: .65rem .8rem; border: 1px solid #d1d5db; border-radius: 10px;
  font-size: 1rem; transition: border-color .15s, box-shadow .15s;
}
input:focus {
  outline: none; border-color: #4f46e5;
  box-shadow: 0 0 0 3px rgba(79, 70, 229, .15);
}
button {
  margin-top: .35rem; padding: .7rem 1rem; background: #4f46e5; color: #fff;
  border: 0; border-radius: 10px; font-size: 1rem; font-weight: 600;
  cursor: pointer; transition: background .15s;
}
button:hover:not(:disabled) { background: #4338ca; }
button:disabled { opacity: .6; cursor: not-allowed; }
.msg { margin: .25rem 0 0; min-height: 1.25rem; font-size: .85rem; color: #dc2626; }
.msg.ok { color: #15803d; }
.alt { margin: 1.25rem 0 0; font-size: .875rem; color: #6b7280; text-align: center; }
.alt.tiny { font-size: .8rem; margin-top: .5rem; }
.alt a { color: #4f46e5; text-decoration: none; font-weight: 500; }
.alt a:hover { text-decoration: underline; }