/* --- Variables y Estilos Globales --- */
:root {
  --primary-color: #2193b0;
  --orange-color: #00556f;
  --secondary-color: #6dd5ed;
  --background-color: #f4f7f6;
  --card-background: #ffffff;
  --text-color: #333;
  --error-color: #e74c3c;
  --input-border-color: #ddd;
  --input-focus-color: #2193b0;
}

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

body {
  font-family: "Poppins", sans-serif;
  background: linear-gradient(
    135deg,
    var(--secondary-color),
    var(--primary-color)
  );
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* --- Contenedor Principal --- */
.login-container {
  background: var(--card-background);
  padding: 2.5rem;
  border-radius: 15px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
  width: 100%;
  max-width: 400px;
  text-align: center;
  transition: transform 0.3s ease;
}

.login-container:hover {
  transform: translateY(-5px);
}

.login-container h2 {
  margin-bottom: 2rem;
  color: var(--text-color);
  font-weight: 600;
}

/* --- Grupos de Inputs con Iconos --- */
.input-group {
  position: relative;
  margin-bottom: 1.5rem;
}

.input-icon {
  position: absolute;
  left: 15px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--orange-color);
  transition: color 0.3s;
}

.input-group input {
  width: 100%;
  padding: 0.9rem 0.9rem 0.9rem 45px; /* Espacio para el icono */
  border: 1px solid var(--input-border-color);
  border-radius: 8px;
  font-size: 1rem;
  transition: border-color 0.3s, box-shadow 0.3s;
}

.input-group input:focus {
  outline: none;
  border-color: var(--input-focus-color);
  box-shadow: 0 0 0 3px rgba(33, 147, 176, 0.2);
}

.input-group input:focus + .input-icon {
  color: var(--primary-color);
}

/* ver/ocultar contraseña  */
.toggle-password {
  position: absolute;
  right: 15px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  cursor: pointer;
  color: var(--orange-color);
  font-size: 1.1rem;
}

/* --- Mensajes de Error --- */
.error-message {
  color: var(--error-color);
  font-size: 0.9rem;
  min-height: 20px; /* Evita que el layout salte */
  margin-bottom: 1rem;
  text-align: left;
}

/* --- Botón de Envío y Spinner --- */
button[type="submit"] {
  width: 100%;
  background: var(--primary-color);
  color: white;
  border: none;
  padding: 0.9rem;
  border-radius: 8px;
  font-size: 1.1rem;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.3s, transform 0.2s;
  display: flex;
  align-items: center;
  justify-content: center;
}

button[type="submit"]:hover {
  background: #176f85;
  transform: translateY(-2px);
}

button[type="submit"]:disabled {
  background-color: #999;
  cursor: not-allowed;
}

.spinner {
  display: none;
  width: 20px;
  height: 20px;
  border: 3px solid rgba(255, 255, 255, 0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

button[type="submit"].loading .spinner {
  display: block;
}

button[type="submit"].loading .button-text {
  display: none;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* --- Enlaces Extra --- */
.extra-links {
  margin-top: 1.5rem;
}
.extra-links a {
  color: #555;
  text-decoration: none;
  font-size: 0.9rem;
}
.extra-links a:hover {
  text-decoration: underline;
}