/* RESET */
* {
  box-sizing: border-box;
  font-family: system-ui, -apple-system, sans-serif;
}

/* BODY */
body {
  margin: 0;
  background: #f3f4f6;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 10px;
}

/* CARD */
.card {
  background: #ffffff;
  width: 100%;
  max-width: 340px;
  padding: 20px;
  border-radius: 8px;
  box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

/* TÍTULO */
h1 {
  text-align: center;
  margin: 0 0 15px;
  font-size: 22px;
  color: #111827;
}

/* LABEL */
label {
  font-size: 14px;
  font-weight: 600;
  color: #374151;
  display: block;
  margin-bottom: 4px;
}

/* INPUTS */
input {
  width: 100%;
  font-size: 16px;
  padding: 14px;
  margin-bottom: 15px;
  border: 2px solid #d1d5db;
  border-radius: 6px;
  -webkit-appearance: none;
}

input:focus {
  border-color: #2563eb;
  outline: none;
  background: #f0f7ff;
}

/* BOTÓN */
button {
  width: 100%;
  background: #1d4ed8;
  color: #ffffff;
  border: none;
  padding: 16px;
  border-radius: 6px;
  font-size: 18px;
  font-weight: bold;
  cursor: pointer;
  touch-action: manipulation;
}

button:active {
  background: #1e3a8a;
  transform: scale(0.98);
}

/* MENSAJE */
#msg {
  text-align: center;
  margin-top: 10px;
  font-size: 14px;
  color: #dc2626;
}