* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: Arial, sans-serif;
}

/* Fondo con imagen */
.background {
    width: 100vw;
    height: 100vh;
    background: url('portada.png') no-repeat center center/cover;
}

/* Capa oscura */
.overlay {
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.4);
    position: relative;
}

/* Login oculto por defecto */
.login-container {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.8);
    background: rgba(255, 255, 255, 0.15);
    padding: 30px;
    border-radius: 15px;
    backdrop-filter: blur(10px);
    opacity: 0;
    transition: all 0.4s ease;
}



/* Estilos del formulario */
.login-container h2 {
    text-align: center;
    color: white;
    margin-bottom: 15px;
}

.login-container input {
    width: 100%;
    padding: 10px;
    margin: 10px 0;
    border: none;
    border-radius: 5px;
}

.login-container button {
    width: 100%;
    padding: 10px;
    border: none;
    background: #3498db;
    color: white;
    border-radius: 5px;
    cursor: pointer;
}

.login-container button:hover {
    background: #2980b9;
}

.error {
    color: #ff6b6b;
    text-align: center;
}