* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Inter", "Segoe UI", system-ui, -apple-system, sans-serif;
  background: #f5f6f8;
  color: #1f2937;
}

.login-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 16px;
}

.login-card {
  width: min(420px, 100%);
  background: #ffffff;
  border: 1px solid #e5e7eb;
  border-radius: 14px;
  box-shadow: 0 12px 26px rgba(0, 0, 0, 0.08);
  padding: 22px;
}

h1 {
  margin: 0 0 8px;
  font-size: 22px;
}

.hint {
  margin: 0 0 16px;
  color: #4b5563;
  font-size: 13px;
}

form {
  display: grid;
  gap: 12px;
}

label {
  display: grid;
  gap: 6px;
  font-size: 14px;
}

input {
  width: 100%;
  border: 1px solid #cbd5e1;
  border-radius: 8px;
  padding: 10px 12px;
  font-size: 14px;
}

button {
  border: none;
  border-radius: 8px;
  padding: 10px 12px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  color: #ffffff;
  background: #0f766e;
}

.error {
  min-height: 20px;
  font-size: 13px;
  color: #b91c1c;
}