/* RESET BÁSICO */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Segoe UI", Arial, sans-serif;
}

/* HEADER */
.header {
  display: flex;
  padding: 15px 20px;
  width: 100%;
}

#logo {
  width: 120px;
  height: auto;
  max-width: 40vw;
}

/* CONTENEDOR PRINCIPAL */
.main-container {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: calc(100vh - 150px);
  padding: 20px;
}

/* CAJA DE LOGIN */
.login-box {
  background-color: white;
  padding: 40px 50px;
  border-radius: 12px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.2);
  text-align: center;
  width: 100%;
  max-width: 350px;
  transition: all 0.3s ease;
}

.login-box h2 {
  margin-bottom: 25px;
  color: #0077b6;
  font-size: 1.5rem;
}

/* INPUTS */
.input-group {
  margin-bottom: 20px;
}

.input-group input {
  width: 100%;
  padding: 12px;
  border: 1px solid #ccc;
  border-radius: 6px;
  font-size: 1rem;
  transition: border-color 0.3s;
}

.input-group input:focus {
  outline: none;
  border-color: deepskyblue;
}

/* BOTÓN LOGIN */
.btn-login {
  width: 100%;
  padding: 12px;
  background-color: deepskyblue;
  color: white;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-weight: bold;
  font-size: 1rem;
  transition: background 0.3s ease;
}

.btn-login:hover {
  background-color: #009fd4;
}
/* MENSAJE DE ERROR */
.login-error {
  color: red;
  font-size: 0.9rem;
  margin-bottom: 15px;
  min-height: 18px; /* reserva espacio aunque esté vacío */
  text-align: left;
}
/* 📱 RESPONSIVE DESIGN */

/* Móviles */
@media (max-width: 600px) {
  #logo {
    width: 90px;
  }

  .login-box {
    padding: 30px 25px;
    max-width: 90%;
  }

  .login-box h2 {
    font-size: 1.3rem;
  }
}

/* Tablets */
@media (min-width: 601px) and (max-width: 1024px) {
  #logo {
    width: 110px;
  }

  .login-box {
    max-width: 400px;
  }
}

/* Escritorio grande */
@media (min-width: 1025px) {
  .login-box {
    max-width: 380px;
  }
}