* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: Arial, Helvetica, sans-serif;
  background: linear-gradient(120deg, #3b82f6, #06b6d4);
  min-height: 100vh;
  display: grid;
  place-items: center;
}

.container { padding: 24px; }
.card {
  width: min(480px, 92vw);
  background: #fff;
  border-radius: 12px;
  padding: 30px;
  box-shadow: 0 8px 20px rgba(0,0,0,.15);
}

.card__title {
  text-align: center;
  color: #111827;
  margin-bottom: 5px;
}

.card__sub {
  text-align: center;
  color: #6b7280;
  margin-bottom: 20px;
}

.register-form {
  display: grid;
  gap: 14px;
}

.field {
  display: grid;
  gap: 8px;
}

.field--inline {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

label {
  font-weight: 600;
  color: #1f2937;
}

.input,
.select {
  width: 100%;
  padding: 10px 12px;
  border: 1.5px solid #cbd5e1;
  border-radius: 8px;
  font-size: 1rem;
  transition: border .15s, box-shadow .15s;
}

.input:focus, .select:focus {
  border-color: #60a5fa;
  box-shadow: 0 0 0 3px rgba(96,165,250,.3);
}

.checkbox {
  display: flex;
  align-items: center;
  gap: 10px;
}

.error {
  color: #dc2626;
  font-size: 0.9rem;
  display: none;
}

.btn {
  width: 100%;
  padding: 12px;
  border: none;
  border-radius: 8px;
  background: #3b82f6;
  color: #fff;
  font-weight: 700;
  cursor: pointer;
  transition: filter .2s ease, transform .05s ease;
}

.btn:hover { filter: brightness(1.05); }
.btn:active { transform: translateY(1px); }